Document and Entity Information (USD $)	12 Months Ended
Document and Entity Information (USD $)	Dec. 31, 2011	Feb. 17, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	WILLIS GROUP HOLDINGS PLC
Entity Central Index Key	0001140536
Document Type	10-K
Document Period End Date	Dec. 31, 2011
Amendment Flag	false
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$ 5,813,892,215
Entity Common Stock, Shares Outstanding		174,139,971

Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
REVENUES
Commissions and fees	$ 3,414	$ 3,293	$ 3,200
Investment income	31	38	50
Other income	2	1	3
Total revenues	3,447	3,332	3,253
EXPENSES
Salaries and benefits	(2,087)	(1,868)	(1,822)
Other operating expenses	(656)	(564)	(590)
Depreciation expense	(74)	(63)	(64)
Amortization of intangible assets	(68)	(82)	(100)
Net gain (loss) on disposal of operations	4	(2)	13
Total expenses	(2,881)	(2,579)	(2,563)
OPERATING INCOME	566	753	690
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs	(171)
Interest expense	(156)	(166)	(174)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES	239	587	516
Income taxes	(32)	(140)	(94)
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES	207	447	422
Interest in earnings of associates, net of tax	12	23	33
INCOME FROM CONTINUING OPERATIONS	219	470	455
Discontinued operations, net of tax	1		4
NET INCOME	220	470	459
Less: net income attributable to noncontrolling interests	(16)	(15)	(21)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	204	455	438
AMOUNTS ATTRIBUTABLE TO WILLIS GROUP HOLDINGS SHAREHOLDERS
Income from continued operations, net of tax	203	455	434
Income from discontinued operations, net of tax	1		4
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$ 204	$ 455	$ 438
BASIC EARNINGS PER SHARE
Continuing operations	$ 1.17	$ 2.68	$ 2.58
DILUTED EARNINGS PER SHARE
Continuing operations	$ 1.15	$ 2.66	$ 2.57
CASH DIVIDENDS DECLARED PER SHARE	$ 1.04	$ 1.04	$ 1.04

Consolidated Balance Sheets In Millions, unless otherwise specified	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)
CURRENT ASSETS
Cash and cash equivalents	$ 436	$ 316
Accounts receivable, net	910	839
Fiduciary assets	9,338	9,569
Deferred tax assets	44	36
Other current assets	259	340
Total current assets	10,987	11,100
NON-CURRENT ASSETS
Fixed assets, net	406	381
Goodwill	3,295	3,294
Other intangible assets, net	420	492
Investments in associates	170	161
Deferred tax assets	22	7
Pension benefits asset	145	182
Other non-current assets	283	233
Total non-current assets	4,741	4,750
TOTAL ASSETS	15,728	15,850
CURRENT LIABILITIES
Fiduciary liabilities	9,338	9,569
Deferred revenue and accrued expenses	320	298
Income taxes payable	15	57
Short-term debt and current portion of long-term debt	15	110
Deferred tax liabilities	26	9
Other current liabilities	282	266
Total current liabilities	9,996	10,309
NON-CURRENT LIABILITIES
Long-term debt	2,354	2,157
Liability for pension benefits	270	167
Deferred tax liabilities	32	83
Provisions for liabilities	196	179
Other non-current liabilities	363	347
Total non-current liabilities	3,215	2,933
Total liabilities	13,211	13,242
COMMITMENTS AND CONTINGENCIES
EQUITY
Ordinary shares, $0.000115 nominal value; Authorized: 4,000,000,000; Issued 173,829,693 shares in 2011 and 170,883,865 shares in 2010 / Ordinary shares, EUR1 nominal value; Authorized: 40,000; Issued 40,000 shares in 2011 and 2010
Preference shares, $0.000115 nominal value; Authorized:1,000,000,000; Issued nil shares in 2011 and 2010
Additional paid-in capital	1,073	985
Retained earnings	2,160	2,136
Accumulated other comprehensive loss, net of tax	(744)	(541)
Treasury shares, at cost, 46,408 shares in 2011 and 2010 and 40,000 shares, EUR1 nominal value, in 2011 and 2010	(3)	(3)
Total Willis Group Holdings shareholders' equity	2,486	2,577
Noncontrolling interests	31	31
Total equity	2,517	2,608
TOTAL LIABILITIES AND EQUITY	$ 15,728	$ 15,850

Consolidated Balance Sheets (Parenthetical)	Dec. 31, 2011 United States of America, Dollars [Member] USD ($)	Dec. 31, 2010 United States of America, Dollars [Member] USD ($)	Dec. 31, 2011 Euro [Member] EUR (€)	Dec. 31, 2010 Euro [Member] EUR (€)
Ordinary shares, nominal value	$ 0.000115	$ 0.000115	€ 1	€ 1
Ordinary shares, shares authorized	4,000,000,000	4,000,000,000	40,000	40,000
Ordinary shares, shares issued	173,829,693	170,883,865	40,000	40,000
Preference shares, nominal value	$ 0.000115	$ 0.000115
Preference shares, shares authorized	1,000,000,000	1,000,000,000
Preference shares, shares issued
Treasury shares, at cost			€ 1	€ 1
Treasury shares	46,408	46,408	40,000	40,000

- Definition

Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share.

+ References+ Details

Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 220	$ 470	$ 459
Adjustments to reconcile net income to total net cash provided by operating activities:
Income from discontinued operations	(1)		(4)
Net (gain) loss on disposal of operations, fixed and intangible assets	(6)	3	(14)
Depreciation expense	74	63	64
Amortization of intangible assets	68	82	100
Provision for doubtful accounts	4		(1)
Provision (benefit) for deferred income taxes	17	77	(21)
Excess tax benefits from share-based payment arrangements	(5)	(2)	(1)
Share-based compensation	41	47	39
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs	171
Undistributed earnings of associates	(5)	(18)	(21)
Non-cash Venezuela currency devaluation		12
Effect of exchange rate changes on net income	14	6	(4)
Changes in operating assets and liabilities, net of effects from purchase of subsidiaries:
Accounts receivable, net	(92)	(35)	77
Fiduciary assets	162	78	776
Fiduciary liabilities	(162)	(78)	(776)
Other assets	(43)	(230)	(103)
Other liabilities	(32)	61	(193)
Movements on provisions	16	(45)	44
Net cash provided by continuing operating activities	441	491	421
Net cash used in discontinued operating activities	(2)	(2)	(2)
Total net cash provided by operating activities	439	489	419
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets	13	10	20
Purchases of fixed assets	(111)	(83)	(96)
Acquisitions of subsidiaries, net of cash acquired	(10)	(21)
Acquisition of investments in associates	(2)	(1)	(42)
Investment in Trident V Parallel Fund, LP	(5)	(1)
Proceeds from reorganization of investment in associates			155
Proceeds from sale of continuing operations, net of cash disposed		2	4
Proceeds from sale of discontinued operations, net of cash disposed	14		40
Proceeds on sale of short-term investments			21
Total net cash (used in) provided by continuing investing activities	(101)	(94)	102
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS FROM OPERATING AND INVESTING ACTIVITIES	338	395	521
CASH FLOWS FROM FINANCING ACTIVITIES
(Repayment on) proceeds from draw down of revolving credit facility	(90)	90
Repayments of debt	(911)	(209)	(1,089)
Senior notes issued	794		800
Debt issuance costs	(12)		(22)
Proceeds from issue of term loan	300
Make whole on repurchase and redemption of senior notes	(158)
Proceeds from issue of shares	60	36	18
Excess tax benefits from share-based payment arrangements	5	2	1
Dividends paid	(180)	(176)	(174)
Acquisition of noncontrolling interests	(9)	(10)	(33)
Dividends paid to noncontrolling interests	(13)	(26)	(17)
Total net cash used in continuing financing activities	(214)	(293)	(516)
INCREASE IN CASH AND CASH EQUIVALENTS	124	102	5
Effect of exchange rate changes on cash and cash equivalents	(4)	(7)	11
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	316	221	205
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 436	$ 316	$ 221

Consolidated Statements of Changes in Equity and Comprehensive Income (USD $) In Millions, except Share data, unless otherwise specified	Total USD ($)	Shares Outstanding	Additional Paid-in Capital USD ($)	Retained Earnings USD ($)	Accumulated Other Comprehensive Income (Loss) USD ($)	Treasury shares USD ($)	Noncontrolling Interest USD ($)
Balance, beginning of year, noncontrolling interest at Dec. 31, 2008	$ 50						$ 50
Balance, beginning of year at Dec. 31, 2008	1,845		886	1,593	(630)	(4)
Balance, beginning of year, shares at Dec. 31, 2008		166,758,000
Change in equity and other comprehensive income
Shares issued		486,000
Exercise of stock options and release of non vested shares		1,417,000
Issue of shares under employee stock compensation plans and related tax benefits			18
Issue of shares for acquisitions			12
Share-based compensation			39
Acquisition of noncontrolling interests			(33)
Repurchase of out of the money options			(4)
Net income attributable to Willis Group Holdings	438			438
Dividends	(189)			(172)			(17)
Foreign currency translation adjustment					27
Unrealized holding gain (loss)	(1)				(1)
Pension funding adjustment					(33)
Net (loss) gain on derivative instruments	43				43
Shares reissued under stock compensation plans	1					1
Net income	21						21
Purchase of subsidiary shares from noncontrolling interests, net	(10)						(10)
Additional noncontrolling interests	5						5
Total equity	2,229
Total Comprehensive income (loss) attributable to Willis Group Holdings	474
Balance, end of year, noncontrolling interest at Dec. 31, 2009	49						49
Balance, end of year at Dec. 31, 2009	2,180		918	1,859	(594)	(3)
Balance, end of year, shares at Dec. 31, 2009		168,661,000
Change in equity and other comprehensive income
Shares issued		14,000
Exercise of stock options and release of non vested shares		2,209,000
Issue of shares under employee stock compensation plans and related tax benefits			37
Issue of shares for acquisitions			1
Share-based compensation			47
Acquisition of noncontrolling interests			(18)
Net income attributable to Willis Group Holdings	455			455
Dividends	(204)			(178)			(26)
Foreign currency translation adjustment					(6)		(2)
Unrealized holding gain (loss)	2				2
Pension funding adjustment					51
Net (loss) gain on derivative instruments	6				6
Net income	15						15
Purchase of subsidiary shares from noncontrolling interests, net	(5)						(5)
Total equity	2,608
Total Comprehensive income (loss) attributable to Willis Group Holdings	508
Balance, end of year, noncontrolling interest at Dec. 31, 2010	31						31
Balance, end of year at Dec. 31, 2010	2,577		985	2,136	(541)	(3)
Balance, end of year, shares at Dec. 31, 2010		170,884,000
Change in equity and other comprehensive income
Exercise of stock options and release of non vested shares		2,946,000
Issue of shares under employee stock compensation plans and related tax benefits			49
Share-based compensation			39
Net income attributable to Willis Group Holdings	204			204
Dividends	(195)			(180)			(15)
Foreign currency translation adjustment					(28)		(1)
Pension funding adjustment					(172)
Net (loss) gain on derivative instruments	(3)				(3)
Net income	16						16
Total equity	2,517
Total Comprehensive income (loss) attributable to Willis Group Holdings	1
Balance, end of year, noncontrolling interest at Dec. 31, 2011	31						31
Balance, end of year at Dec. 31, 2011	$ 2,486		$ 1,073	$ 2,160	$ (744)	$ (3)
Balance, end of year, shares at Dec. 31, 2011		173,830,000

Nature of Operations

12 Months Ended

Dec. 31, 2011

Nature of Operations [Abstract]

NATURE OF OPERATIONS


1.	NATURE OF OPERATIONS

Willis provides a broad range of insurance and reinsurance broking and risk management consulting services to its clients worldwide, both directly and indirectly through its associates. The Company provides both specialized risk management advisory and consulting services on a global basis to clients engaged in specific industrial and commercial activities, and services to small, medium and large corporations through its retail operations.

In its capacity as an advisor and insurance broker, the Company acts as an intermediary between clients and insurance carriers by advising clients on risk management requirements, helping clients determine the best means of managing risk, and negotiating and placing insurance risk with insurance carriers through the Company’s global distribution network.

Basis of Presentation and Significant Accounting Policies

12 Months Ended

Dec. 31, 2011

Basis of Presentation and Significant Accounting Policies [Abstract]

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

2. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

Redomicile to Ireland

On September 24, 2009, Willis Group Holdings was incorporated in Ireland, in order to effectuate the change of the place of incorporation of the parent company of the Group. Willis Group Holdings operated as a wholly-owned subsidiary of Willis-Bermuda until December 31, 2009, when the outstanding common shares of Willis-Bermuda were canceled and Willis Group Holdings issued ordinary shares with substantially the same rights and preferences on a one-for-one basis to the holders of the Willis-Bermuda common shares that were canceled. Upon completion of this transaction, Willis Group Holdings replaced Willis-Bermuda as the ultimate parent company and Willis-Bermuda became a wholly-owned subsidiary of Willis Group Holdings. On July 29, 2010 Willis-Bermuda was liquidated.

This transaction was accounted for as a merger between entities under common control; accordingly, the historical financial statements of Willis-Bermuda for periods prior to this transaction are considered to be the historical financial statements of Willis Group Holdings. No changes in capital structure, assets or liabilities resulted from this transaction, other than Willis Group Holdings providing a guarantee of amounts due under certain borrowing arrangements of one of its subsidiaries as described in Note 29.

Recent Accounting Pronouncements

Fair Value Measurement and Disclosure

In May 2011, the Financial Accounting Standards Board (‘FASB’) issued Accounting Standards Update (‘ASU’) No. 2011-04, Fair Value Measurement: Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The new guidance was issued to provide a consistent definition of fair value and ensure that fair value measurements and disclosure requirements are similar between US GAAP and International Financial Reporting Standards (‘IFRS’). The guidance changes certain fair value measurement principles and enhances the disclosure requirements for fair value measurements.

This guidance is effective for interim and annual periods beginning after December 15, 2011 and is applied prospectively.

Other Comprehensive Income

In June 2011, the FASB issued ASU No. 2011-05, Presentation of Comprehensive Income to revise the manner in which entities present comprehensive income in their financial statements. These changes require that components of comprehensive income be presented in either a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendments do not change the items that must be reported in other comprehensive income or when an item of other comprehensive income must be reclassified to net income.

This guidance is effective for interim and annual periods beginning after December 15, 2011 and is applied retrospectively.

ASU No. 2011-05 also requires entities to present on the face of the financial statements reclassification adjustments for items that are reclassified from other comprehensive income to net income in the statement(s) where the components of net income and the components of other comprehensive income are presented. In December 2011, the FASB issued ASU No. 2011-12 in order to defer those changes in ASU No. 2011-05 that relate to the presentation of reclassification adjustments.

Goodwill impairment testing

In September 2011, the FASB issued ASU No. 2011-08, Intangibles — Goodwill and Other: Testing Goodwill for Impairment. The new guidance was issued to reduce complexity and costs by allowing an entity the option to make a qualitative evaluation about the likelihood of goodwill impairment to determine whether it should calculate the fair value of a reporting unit.

This guidance is effective for interim and annual goodwill impairment tests performed for fiscal years beginning after December 15, 2011.

The adoption of this guidance is not expected to have a material impact on the financial statements.

Significant Accounting Policies

These consolidated financial statements conform to accounting principles generally accepted in the United States of America (‘US GAAP’). Presented below are summaries of significant accounting policies followed in the preparation of the consolidated financial statements.

Certain reclassifications have been made to prior year amounts to conform to the current year presentation.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Willis Group Holdings and its subsidiaries, which are controlled through the ownership of a majority voting interest. Intercompany balances and transactions have been eliminated on consolidation.

Foreign Currency Translation

Transactions in currencies other than the functional currency of the entity are recorded at the rates of exchange prevailing at the date of the transaction. Monetary assets and liabilities in currencies other than the functional currency are translated at the rates of exchange prevailing at the balance sheet date and the related transaction gains and losses are reported in the statements of operations. Certain intercompany loans are determined to be of a long-term investment nature. The Company records transaction gains and losses from remeasuring such loans as a component of other comprehensive income.

Upon consolidation, the results of operations of subsidiaries and associates whose functional currency is other than the US dollar are translated into US dollars at the average exchange rate and assets and liabilities are translated at year-end exchange rates. Translation adjustments are presented as a separate component of other comprehensive income in the financial statements and are included in net income only upon sale or liquidation of the underlying foreign subsidiary or associated company.

Use of Estimates

The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the dates of the financial statements and the reported amounts of revenues and expenses during the year. In the preparation of these consolidated financial statements, estimates and assumptions have been made by management concerning: the valuation of intangible assets and goodwill (including those acquired through business combinations); the selection of useful lives of fixed and intangible assets; impairment testing; provisions necessary for accounts receivable, commitments and contingencies and accrued liabilities; long-term asset returns, discount rates and mortality rates in order to estimate pension liabilities and pension expense; income tax valuation allowances; and other similar evaluations. Actual results could differ from the estimates underlying these consolidated financial statements.

Cash and Cash Equivalents

Cash and cash equivalents primarily consist of time deposits with original maturities of three months or less.

Fiduciary Assets and Fiduciary Liabilities

In its capacity as an insurance agent or broker, the Company collects premiums from insureds and, after deducting its commissions, remits the premiums to the respective insurers; the Company also collects claims or refunds from insurers which it then remits to insureds.

Fiduciary Receivables

Fiduciary receivables represent uncollected premiums from insureds and uncollected claims or refunds from insurers.

Fiduciary Funds

Fiduciary funds represent unremitted premiums received from insureds and unremitted claims or refunds received from insurers. Fiduciary funds are generally required to be kept in certain regulated bank accounts subject to guidelines which emphasize capital preservation and liquidity. Such funds are not available to service the Company’s debt or for other corporate purposes. Notwithstanding the legal relationships with insureds and insurers, the Company is entitled to retain investment income earned on fiduciary funds in accordance with industry custom and practice and, in some cases, as supported by agreements with insureds.

In certain instances, the Company advances premiums, refunds or claims to insurance underwriters or insureds prior to collection. Such advances are made from fiduciary funds and are reflected in the accompanying consolidated balance sheets as fiduciary assets.

Fiduciary Liabilities

The obligations to remit these funds to insurers or insureds are recorded as fiduciary liabilities on the Company’s consolidated balance sheets. The period for which the Company holds such funds is dependent upon the date the insured remits the payment of the premium to the Company and the date the Company is required to forward such payment to the insurer. Balances arising from insurance brokerage transactions are reported as separate assets or liabilities unless such balances are due to or from the same party and a right of offset exists, in which case the balances are recorded net.

Accounts Receivable

Accounts receivable are stated at estimated net realizable values. Allowances are recorded, when necessary, in an amount considered by management to be sufficient to meet probable future losses related to uncollectible accounts.

Fixed Assets

Fixed assets are stated at cost less accumulated depreciation. Expenditures for improvements are capitalized; repairs and maintenance are charged to expenses as incurred. Depreciation is computed using the straight-line method based on the estimated useful lives of assets.

Depreciation on buildings and long leaseholds is calculated over the lesser of 50 years or the lease term. Depreciation on leasehold improvements is calculated over the lesser of the useful life of the assets or the remaining lease term. Depreciation on furniture and equipment is calculated based on a range of 3 to 10 years. Freehold land is not depreciated.

Recoverability of Fixed Assets

Long-lived assets are tested for recoverability whenever events or changes in circumstance indicate that their carrying amounts may not be recoverable. An impairment loss is recognized if the carrying amount of a long-lived asset is not recoverable and exceeds its fair value. Recoverability is determined based on the undiscounted cash flows expected to result from the use and eventual disposition of the asset or asset group. Long-lived assets and certain identifiable intangible assets to be disposed of are reported at the lower of carrying amount or fair value less cost to sell.

Operating Leases

Rentals payable on operating leases are charged straight line to expenses over the lease term as the rentals become payable.

Goodwill and Other Intangible Assets

Goodwill represents the excess of the cost of businesses acquired over the fair market value of identifiable net assets at the dates of acquisition. The Company reviews goodwill for impairment annually and whenever facts or circumstances indicate that the carrying amounts may not be recoverable. In testing for impairment, the fair value of each reporting unit is compared with its carrying value, including goodwill. If the carrying amount of a reporting unit exceeds its fair value, the amount of an impairment loss, if any, is calculated by comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill.

Acquired intangible assets are amortized over the following periods:


		Expected
	Amortization basis	life (years)

Acquired intangible assets	Straight line		10
Acquired HRH customer relationships	In line with underlying cashflows		20
Acquired HRH non-compete agreements	Straight line		2
Acquired HRH trade names	Straight line		4

Amortizable intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable.

Investments in Associates

Investments are accounted for using the equity method of accounting if the Company has the ability to exercise significant influence, but not control, over the investee. Significant influence is generally deemed to exist if the Company has an equity ownership in the voting stock of the investee between 20 and 50 percent, although other factors, such as representation on the Board of Directors and the impact of commercial arrangements, are considered in determining whether the equity method of accounting is appropriate. Under the equity method of accounting the investment is carried at cost of acquisition, plus the Company’s equity in undistributed net income since acquisition, less any dividends received since acquisition.

The Company periodically reviews its investments in associates for which fair value is less than cost to determine if the decline in value is other than temporary. If the decline in value is judged to be other than temporary, the cost basis of the investment is written down to fair value. The amount of any write-down is included in the statements of operations as a realized loss.

All other equity investments where the Company does not have the ability to exercise significant influence are accounted for by the cost method. Such investments are not publicly traded.

Derivative Financial Instruments

The Company uses derivative financial instruments for other than trading purposes to alter the risk profile of an existing underlying exposure. Interest rate swaps are used to manage interest risk exposures. Forward foreign currency exchange contracts are used to manage currency exposures arising from future income and expenses. The fair values of derivative contracts are recorded in other assets and other liabilities. The effective portions of changes in the fair value of derivatives that qualify for hedge accounting as cash flow hedges are recorded in other comprehensive income. Amounts are reclassified from other comprehensive income into earnings when the hedged exposure affects earnings. If the derivative is designated as and qualifies as an effective fair value hedge, the changes in the fair value of the derivative and of the hedged item attributable to the hedged risk are both recognized in earnings. The amount of hedge ineffectiveness recognised in earnings is based on the extent to which an offset between the fair value of the derivative and hedged item is not achieved. Changes in fair value of derivatives that do not qualify for hedge accounting, together with any hedge ineffectiveness on those that do qualify, are recorded in other operating expenses or interest expense as appropriate.

Income Taxes

The Company recognizes deferred tax assets and liabilities for the estimated future tax consequences of events attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating and capital loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted rates in effect for the year in which the differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of changes in tax rates is recognized in the statement of operations in the period in which the enactment date changes. Deferred tax assets are reduced through the establishment of a valuation allowance at such time as, based on available evidence, it is more likely than not that the deferred tax assets will not be realized. The Company adjusts valuation allowances to measure deferred tax assets at the amount considered realizable in future periods if the Company’s facts and assumptions change. In making such determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies and recent financial operations.

Positions taken in the Company’s tax returns may be subject to challenge by the taxing authorities upon examination. The Company recognizes the benefit of uncertain tax positions in the financial statements when it is more likely than not that the position will be sustained on examination by the tax authorities upon lapse of the relevant statute of limitations, or when positions are effectively settled. The benefit recognized is the largest amount of tax benefit that is greater than 50 percent likely to be realized on settlement with the tax authority, assuming full knowledge of the position and all relevant facts. The Company adjusts its recognition of these uncertain tax benefits in the period in which new information is available impacting either the recognition or measurement of its uncertain tax positions. These differences will be reflected as increases or decreases to income tax expense in the period in which they are determined.

Changes in tax laws and rates could also affect recorded deferred tax assets and liabilities in the future. Management is not aware of any such changes that would have a material effect on the Company’s results of operations, cash flows or financial position.

The Company recognizes interest and penalties relating to unrecognized tax benefits within income taxes.

Provisions for Liabilities

The Company is subject to various actual and potential claims, lawsuits and other proceedings. The Company records liabilities for such contingencies including legal costs when it is probable that a liability has been incurred before the balance sheet date and the amount can be reasonably estimated. To the extent such losses can be recovered under the Company’s insurance programs, estimated recoveries are recorded when losses for insured events are recognized and the recoveries are likely to be realized. Significant management judgment is required to estimate the amounts of such contingent liabilities and the related insurance recoveries. The Company analyzes its litigation exposure based on available information, including consultation with outside counsel handling the defense of these matters, to assess its potential liability. Contingent liabilities are not discounted.

Pensions

The Company has two principal defined benefit pension plans which cover approximately half of employees in the United States and United Kingdom. Both these plans are now closed to new entrants. New entrants in the United Kingdom are offered the opportunity to join a defined contribution plan and in the United States are offered the opportunity to join a 401(k) plan. In addition, there are smaller plans in certain other countries in which the Company operates. Elsewhere, pension benefits are typically provided through defined contribution plans.

Defined benefit plans

The net periodic cost of the Company’s defined benefit plans are measured on an actuarial basis using the projected unit credit method and several actuarial assumptions the most significant of which are the discount rate and the expected long-term rate of return on plan assets. Other material assumptions include rates of participant mortality, the expected long-term rate of compensation and pension increases and rates of employee termination. Gains and losses occur when actual experience differs from actuarial assumptions. If such gains or losses exceed ten percent of the greater of plan assets or plan liabilities the Company amortizes those gains or losses over the average remaining service period of the employees.

In accordance with US GAAP the Company records on the balance sheet the funded status of its pension plans based on the projected benefit obligation.

Defined contribution plans

Contributions to the Company’s defined contribution plans are recognized as they fall due. Differences between contributions payable in the year and contributions actually paid are shown as either other assets or other liabilities in the consolidated balance sheets.

Share-Based Compensation

The Company accounts for share-based compensation as follows:


•	the cost resulting from all equity awards is recognized in the financial statements at fair value estimated at the grant date;

•	the fair value is recognized (generally as compensation cost) over the requisite service period for all awards that vest; and

•	compensation cost is not recognized for awards that do not vest because service or performance conditions are not satisfied.

Revenue Recognition

Revenue includes insurance commissions, fees for services rendered, certain commissions receivable from insurance carriers, investment income and other income.

Brokerage income and fees negotiated in lieu of brokerage are recognized at the later of policy inception date or when the policy placement is complete. Commissions on additional premiums and adjustments are recognized when approved by or agreed between the parties and collectability is reasonably assured.

Fees for risk management and other services are recognized as the services are provided. Consideration for negotiated fee arrangements for an agreed period covering multiple insurance placements, the provision of risk management and/or other services are allocated to all deliverables on the basis of their relative selling prices. The Company establishes contract cancellation reserves where appropriate: at December 31, 2011, 2010 and 2009, such amounts were not material.

Investment income is recognized as earned.

Other income comprises gains on disposal of intangible assets, which primarily arise on the disposal of books of business. Although the Company is not in the business of selling intangible assets, from time to time the Company will dispose of a book of business (a customer list) or other intangible assets that do not produce adequate margins or fit with the Company’s strategy.

Employees

12 Months Ended

Dec. 31, 2011

Employees [Abstract]

EMPLOYEES


3.	EMPLOYEES

The average number of persons, including Executive Directors, employed by the Company is as follows:


	Years ended December 31,
	2011		2010		2009

Global		4,042		3,931		3,815

North America		6,479		6,710		7,116
International		6,634		6,460		6,202

Total Retail		13,113		13,170		13,318

Total average number of employees for the year		17,155		17,101		17,133

Salaries and benefits expense comprises the following:


	Years ended December 31,
	2011		2010		2009
	(millions)

Salaries and other compensation awards including amortization of cash retention awards of $185 million, $119 million and $88 million (see below)	$	1,776	$	1,618	$	1,570
Share-based compensation		41		47		39
Severance costs		89		15		24
Social security costs		130		119		117
Retirement benefits — defined benefit plan expense		11		35		42
Retirement benefits — defined contribution plan expense		40		34		30

Total salaries and benefits expense	$	2,087	$	1,868	$	1,822

Severance Costs

As part of the Company’s 2011 Operational Review, the Company incurred severance costs of $89 million in the year ended December 31, 2011. These costs relate to approximately 1,200 positions that have been eliminated.

$81 million of these severance costs for these employees were recognized pursuant to a one-time benefit arrangement, with the remaining $8 million recognized pursuant to the terms of employees’ existing benefit arrangements or employee arrangements. All of these costs have been recognized within salaries and benefits.

In addition to the severance incurred as part of the 2011 Operational Review, an additional charge of $9 million in the year ended December 31, 2011 was recognized within salaries and benefits relating to the write-off of retention awards held on the balance sheet for the approximately 1,200 positions that have been eliminated.

The Company’s severance liability under the 2011 Operational Review was:


	December 31,
	2011
	(millions)

Balance at January 1, 2011	$	—
Severance costs accrued		89
Cash payments		(64	)
Foreign exchange		(1	)

Balance at December 31, 2011	$	24

The Company evaluates the performance of its operating segments based on organic commissions and fees growth and operating income. For internal reporting and segmental reporting, segmental management are not held accountable for certain items deemed to be centrally-controlled costs and initiatives, which includes the 2011 Operational Review. See Note 27 — Segment Information for an analysis of centrally-controlled costs and initiatives, including the 2011 Operational Review costs, disclosed within ‘Corporate and Other’.

Severance costs also arise in the normal course of business and these charges amounted to a nominal amount in the year ended December 31, 2011 (2010: $15 million; 2009: $24 million). These relate to approximately 100 positions (2010: 550 positions; 2009: 450 positions) that have been, or are in the process of being, eliminated.

Cash Retention Awards

As part of the Company’s incentive compensation, the Company makes annual cash retention awards to its employees. Employees must repay a proportionate amount of these awards if they voluntarily leave the Company’s employ (other than in the event of retirement or permanent disability) before a certain time period, currently up to three years. The Company makes cash payments to its employees in the year it grants these retention awards and recognizes these payments ratably over the period they are subject to repayment, beginning in the quarter in which the award is made. The unamortized portion of cash retention awards is recorded within other current assets and other non-current assets.

The following table sets out the amount of cash retention awards made and the related amortization of those awards for the years ended December 31, 2011, 2010 and 2009:


	Years ended December 31,
	2011		2010		2009
	(millions)

Cash retention awards made	$	210	$	196	$	148
Amortization of cash retention awards included in salaries and benefits		185		119		88

Unamortized cash retention awards totaled $196 million as of December 31, 2011 (2010: $173 million; 2009: $98 million).

- Definition

The entire disclosure for compensation costs, including compensated absences accruals, compensated absences liability, deferred compensation arrangements and income statement compensation items. Deferred compensation arrangements may include a description of an arrangement with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain amounts at designated future dates, usually including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares (units) issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability.

+ References+ Details

Share-Based Compensation

12 Months Ended

Dec. 31, 2011

Share-Based Compensation [Abstract]

SHARE-BASED COMPENSATION


4.	SHARE-BASED COMPENSATION

On December 31, 2011, the Company had a number of open share-based compensation plans, which provide for the grant of time-based options and performance-based options, restricted stock units and various other share-based grants to employees. All of the Company’s share-based compensation plans under which any options, restricted stock units or other share-based grants are outstanding as at December 31, 2011 are described below. The compensation cost that has been recognized for those plans for the year ended December 31, 2011 was $41 million (2010: $47 million; 2009: $39 million). The total income tax benefit recognized in the statement of operations for share-based compensation arrangements for the year ended December 31, 2011 was $11 million (2010: $14 million; 2009: $12 million).

2008 Share Purchase and Option Plan

This plan, which was established on April 23, 2008, provides for the granting of time and performance-based options, restricted stock units and various other share-based grants at fair market value to employees of the Company. There are 8,000,000 shares available for grant under this plan. Options are exercisable on a variety of dates, including from the third, fourth or fifth anniversary of grant. Unless terminated sooner by the Board of Directors, the 2008 Plan will expire 10 years after the date of its adoption. That termination will not affect the validity of any grant outstanding at that date.

2001 Share Purchase and Option Plan

This plan, which was established on May 3, 2001, provides for the granting of time-based options, restricted stock units and various other share-based grants at fair market value to employees of the Company. The Board of Directors has adopted several sub-plans under the 2001 plan to provide employee sharesave schemes in the UK, Ireland and internationally. The 2001 Plan (and all sub-plans) expired on May 3, 2011 and no further grants will be made under the plan. Options are exercisable on a variety of dates, including from the first, second, third, sixth or eighth anniversary of grant, although for certain options the exercisable date may accelerate depending on the achievement of certain performance goals.

HRH Option Plans

Options granted under the Hilb Rogal and Hamilton Company 2000 Stock Incentive Plan (‘HRH 2000 Plan’) and the Hilb Rogal & Hobbs Company 2007 Stock Incentive Plan (the ‘HRH 2007 Plan’) were converted into options to acquire shares of Willis Group Holdings. No further grants are to be made under the HRH 2000 Plan. Willis is authorized to grant equity awards under the HRH 2007 Plan until 2017 to employees who were formerly employed by HRH and to new employees who have joined Willis or one of its subsidiaries since October 1, 2008, the date that the acquisition of HRH was completed.

Employee Stock Purchase Plans

The Company has adopted the Willis Group Holdings 2001 North America Employee Share Purchase Plan, which expired on May 31, 2011 and the Willis Group Holdings 2010 North America Employee Stock Purchase Plan. They provide certain eligible employees to the Company’s subsidiaries in the US and Canada the ability to contribute payroll deductions to the purchase of Willis Shares at the end of each offering period.

Option Valuation Assumptions

The fair value of each option is estimated on the date of grant using the Black-Scholes option pricing model that uses the assumptions noted in the following table. Expected volatility is based on historical volatility of the Company’s stock. With effect from January 1, 2006, the Company uses the simplified method set out in Accounting Standard Codification (‘ASC’) 718-10-S99 to derive the expected term of options granted. The risk-free rate for periods within the expected life of the option is based on the US Treasury yield curve in effect at the time of grant.


	Years ended December 31,
	2011			2010			2009

Expected volatility		31.4	%		30.4	%		32.4	%
Expected dividends		2.5	%		3.4	%		3.9	%
Expected life (years)		6			5			5
Risk-free interest rate		2.2	%		2.2	%		3.0	%

A summary of option activity under the plans at December 31, 2011, and changes during the year then ended is presented below:


						Weighted
				Weighted		Average
				Average		Remaining		Aggregate
				Exercise		Contractual		Intrinsic
(Options in thousands)	Options			Price⁽ⁱ⁾		Term		Value
								(millions)

Time-based stock options
Balance, beginning of year		11,449		$	32.73
Granted		140		$	30.30
Exercised		(1,769	)	$	29.44
Forfeited		(521	)	$	32.46
Expired		(125	)	$	32.17

Balance, end of year		9,174		$	33.35		3 years	$	50

Options vested or expected to vest at December 31, 2011		8,896		$	33.51		3 years	$	49
Options exercisable at December 31, 2011		7,702		$	34.07		3 years	$	38

Performance-based stock options
Balance, beginning of year		9,449		$	32.14
Granted		1,523		$	41.40
Exercised		(96	)	$	29.61
Forfeited		(3,593	)	$	36.23

Balance, end of year		7,283		$	32.09		6 years	$	49

Options vested or expected to vest at December 31, 2011		6,227		$	32.30		6 years	$	44
Options exercisable at December 31, 2011		1,879		$	32.80		5 years	$	11


⁽ⁱ⁾		Certain options are exercisable in pounds sterling and are converted to dollars using the exchange rate at December 31, 2011.

The weighted average grant-date fair value of time-based options granted during the year ended December 31, 2011 was $9.49 (2010: $5.25; 2009: $5.87). The total intrinsic value of options exercised during the year ended December 31, 2011 was $17 million (2010: $8 million; 2009: $3 million). At December 31, 2011 there was $7 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements under time-based stock option plans; that cost is expected to be recognized over a weighted average period of 2 years.

The weighted average grant-date fair value of performance-based options granted during the year ended December 31, 2011 was $10.26 (2010: $7.11; 2009: $5.89). The total intrinsic value of options exercised during the year ended December 31, 2011 was $1 million (2010: $nil; 2009: $1 million). At December 31, 2011 there was $26 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements under performance-based stock option plans; that cost is expected to be recognized over a weighted-average period of 3 years.

A summary of restricted stock unit activity under the Plans at December 31, 2011, and changes during the year then ended is presented below:


				Weighted
				Average
				Grant Date
(Units awarded in thousands)	Shares			Fair Value

Nonvested shares (restricted stock units)
Balance, beginning of year		1,798		$	28.82
Granted		346		$	40.77
Vested		(918	)	$	29.31
Forfeited		(34	)	$	27.18

Balance, end of year		1,192		$	31.96

The total number of restricted stock units vested during the year ended December 31, 2011 was 918,480 shares at an average share price of $39.52 (2010: 744,633 shares at an average share price of $32.17). At December 31, 2011 there was $17 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements under the plan; that cost is expected to be recognized over a weighted average period of 2 years.

Cash received from option exercises under all share-based payment arrangements for the year ended December 31, 2011 was $60 million (2010: $37 million; 2009: $19 million). The actual tax benefit realized for the tax deductions from option exercises of the share-based payment arrangements totaled $18 million for the year ended December 31, 2011 (2010: $10 million; 2009: $5 million).

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64, 65, A240

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 93-6

-Paragraph 53

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 50

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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-Paragraph 4

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-Topic 718

-SubTopic 40

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

Net Gain (Loss) on Disposal of Operations

12 Months Ended

Dec. 31, 2011

Net Gain (Loss) on Disposal of Operations and Discontinued operations [Abstract]

NET GAIN (LOSS) ON DISPOSAL OF OPERATIONS


6.	NET GAIN (LOSS) ON DISPOSAL OF OPERATIONS

A gain on disposal of $4 million is recorded in the consolidated statements of operations for the year ended December 31, 2011 following conclusion of the accounting for the Gras Savoye December 2009 leveraged transaction — see Note 14 — Investments in Associates.

Total proceeds from the disposal of operations for 2010 were $4 million, comprising $2 million relating to 2010 disposals of operations and $2 million of deferred proceeds relating to prior year. A loss on disposal of $2 million is recorded in the consolidated statements of operations for the year ended December 31, 2010.

Total proceeds from the disposal of operations for 2009 were $315 million, including $281 million for 18 percent of the Group’s 49 percent interest in Gras Savoye and $39 million for 100 percent of Bliss & Glennon. A gain on disposal of $13 million is recorded in the statement of consolidated operations for the year ended December 31, 2009, of which $10 million relates to Gras Savoye as shown below.

On December 17, 2009, the Company completed a leveraged transaction with the original family shareholders of Gras Savoye and Astorg Partners, a private equity fund, to reorganize the capital of Gras Savoye (‘December 2009 leveraged transaction’), its principal investment in associates. The Company, the family shareholders and Astorg owned equal stakes of 31 percent in Gras Savoye and had equal representation of one third of the voting rights on its board. The remaining shareholding was held by a large pool of Gras Savoye managers and minority shareholders. The Company’s interest was reduced from 31 percent to 30 percent in 2011 following issuance of additional share capital as part of an employee share incentive scheme.

As a result of the December 2009 leveraged transaction the Company recognized a gain of $10 million in the consolidated statement of operations from the reduction of its interest in Gras Savoye from 49 percent to 31 percent.

The Company received total proceeds of $281 million, comprising cash and interest bearing vendor loans and convertible bonds issued by Gras Savoye. An analysis of the proceeds and the calculation of the gain is as follows:


	(millions)

Proceeds:
Cash	$	155
Vendor Loans		47
Convertible Bonds		79

Net proceeds		281
Less net assets disposed of		(97	)
Less interest in new liabilities of Gras Savoye		(174	)

Gain on disposal	$	10

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 43-48

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

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-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

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-Topic 205

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-Topic 205

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-Paragraph 5

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-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

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-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1012-107759

Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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+ Details

Income Taxes

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

INCOME TAXES


7.	INCOME TAXES

An analysis of income from continuing operations before income taxes and interest in earnings of associates by location of the taxing jurisdiction is as follows:


	Years ended December 31,
	2011			2010		2009
	(millions)

Ireland	$	(39	)	$	3	$	(2	)
US		(25	)		84		2
UK		(58	)		183		204
Other jurisdictions		361			317		312

Income from continuing operations before income taxes and interest in earnings of associates	$	239		$	587	$	516

The provision for income taxes by location of the taxing jurisdiction consisted of the following:


	Years ended December 31,
	2011			2010			2009
	(millions)

Current income taxes:
Irish corporation tax	$	—		$	1		$	—
US federal tax		—			(30	)		40
US state and local taxes		1			—			17
UK corporation tax		(33	)		54			17
Other jurisdictions		42			41			52

Total current taxes		10			66			126

Non-current taxes:
US federal tax		5			(3	)		(9	)
US state and local taxes		—			(3	)		(2	)
UK corporation tax		(4	)		—			—
Other jurisdictions		4			3			—

Total non-current taxes		5			(3	)		(11	)

Deferred taxes:
US federal tax		(6	)		57			(24	)
US state and local taxes		1			9			(3	)
UK corporation tax		20			3			1
Other jurisdictions		2			8			5

Total deferred taxes		17			77			(21	)

Total income taxes	$	32		$	140		$	94

The reconciliation between US federal income taxes at the statutory rate and the Company’s provision for income taxes on continuing operations is as follows:


	Years ended December 31,
	2011			2010			2009
	(millions, except percentages)

Income from continuing operations before income taxes and interest in earnings of associates	$	239		$	587		$	516

US federal statutory income tax rate		35	%		35	%		35	%

Income tax expense at US federal tax rate		84			205			181
Adjustments to derive effective rate:
Non-deductible expenditure		15			7			4
Movement in provision for non-current taxes		3			(3	)		(11	)
Release of provision for unremitted earnings		—			—			(27	)
Impact of change in tax rate on deferred tax balances		(3	)		(4	)		—
Adjustment in respect of prior periods		(13	)		(22	)		(6	)
Non-deductible Venezuelan foreign exchange loss		—			4			—
Non-taxable profit on disposal of Gras Savoye		—			1			(3	)
Effect of foreign exchange and other differences		1			11			2
Changes in valuation allowances applied to deferred tax assets		5			—			—
Net tax effect of intra-group items		(31	)		(26	)		—
Tax differentials of foreign earnings:
UK earnings		6			(13	)		(13	)
Other jurisdictions and US state taxes		(35	)		(20	)		(33	)

Provision for income taxes	$	32		$	140		$	94

The net tax effect of intra-group items principally relates to transactions, the pre-tax effect of which has been eliminated in arriving at the Company’s consolidated income from continuing operations before income taxes. The prior-year comparative analysis is restated to separately disclose these items, which were previously included as part of the effect of foreign exchange and other differences.

The significant components of deferred income tax assets and liabilities and their balance sheet classifications are as follows:


	December 31,
	2011			2010
	(millions)

Deferred tax assets:
Accrued expenses not currently deductible	$	116		$	34
US state net operating losses		56			47
US federal net operating losses		23			—
UK net operating losses		1			2
Other net operating losses		7			3
UK capital losses		45			49
Accrued retirement benefits		105			62
Deferred compensation		45			46
Stock options		34			51

Gross deferred tax assets		432			294
Less: valuation allowance		(102	)		(87	)

Net deferred tax assets	$	330		$	207

Deferred tax liabilities:
Cost of intangible assets, net of related amortization	$	149		$	155
Cost of tangible assets, net of related amortization		42			25
Prepaid retirement benefits		36			50
Accrued revenue not currently taxable		26			7
Cash retention award		63			10
Tax-leasing transactions		2			3
Financial derivative transactions		4			6
Other		—			—

Deferred tax liabilities		322			256

Net deferred tax asset (liability)	$	8		$	(49	)


	December 31,
	2011			2010
	(millions)

Balance sheet classifications:
Current:
Deferred tax assets	$	44		$	36
Deferred tax liabilities		(26	)		(9	)

Net current deferred tax assets		18			27

Non-current:
Deferred tax assets		22			7
Deferred tax liabilities		(32	)		(83	)

Net non-current deferred tax liabilities		(10	)		(76	)

Net deferred tax asset (liability)	$	8		$	(49	)

At December 31, 2011 the Company had valuation allowances of $102 million (2010: $87 million) to reduce its deferred tax assets to estimated realizable value. The valuation allowances at December 31, 2011 relate to the deferred tax assets arising from UK capital loss carryforwards ($45 million) and other net operating losses ($6 million), which have no expiration date and to the deferred tax assets arising from US State net operating losses ($51 million). US State net operating losses will expire by 2030. Capital loss carryforwards can only be offset against future UK capital gains.


			Additions/
			(releases)								Balance
	Balance at		charged to					Foreign			at
	beginning		costs and		Deductions/Other			exchange			end of
Description	of year		expenses		movements			differences			year
	(millions)

Year ended December 31, 2011
Deferred tax valuation allowance		87		—		15			—			102

Year ended December 31, 2010
Deferred tax valuation allowance		92		—		(4	)		(1	)		87

Year ended December 31, 2009
Deferred tax valuation allowance		85		—		2			5			92

At December 31, 2011 the Company had deferred tax assets of $330 million (2010: $207 million), net of the valuation allowance. Management believes, based upon the level of historical taxable income and projections for future taxable income, it is more likely than not that the Company will realize the benefits of these deductible differences, net of the valuation allowance. However, the amount of the deferred tax asset considered realizable could be adjusted in the future if estimates of taxable income are revised.

The Company recognizes deferred tax balances related to the undistributed earnings of subsidiaries when the Company expects that it will recover those undistributed earnings in a taxable manner, such as through receipt of dividends or sale of the investments. The Company does not, however, provide for income taxes on the unremitted earnings of certain other subsidiaries where, in management’s opinion, such earnings have been indefinitely reinvested in those operations, or will be remitted either in a tax free liquidation or as dividends with taxes substantially offset by foreign tax credits. It is not practical to determine the amount of unrecognized deferred tax liabilities for temporary differences related to these investments.

Unrecognized tax benefits

Total unrecognized tax benefits as at December 31, 2011, totaled $16 million. During the next 12 months it is reasonably possible that the Company will recognize approximately $1 million of tax benefits related to the release of provisions no longer required due to either settlement through negotiation or closure of the statute of limitations on assessment.

A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows:


	2011		2010			2009
	(millions)

Balance at January 1	$	13	$	17		$	33
Reductions due to a lapse of the applicable statute of limitation		—		(7	)		(11	)
Adjustment to assessment of acquired HRH balances		—		—			(8	)
Other movements		3		3			3

Balance at December 31	$	16	$	13		$	17

All of the unrecognized tax benefits at December 31, 2011 would, if recognized, favorably affect the effective tax rate in future periods.

The Company files tax returns in the various tax jurisdictions in which it operates. The 2007 US tax year closed in 2011 upon the expiration of the statute of limitations on assessment. US tax returns have been filed timely. The Company has received notice that the IRS will be examining the 2009 tax return. The Company has not extended the federal statute of limitations for assessment in the US.

All UK tax returns have been filed timely and are in the normal process of being reviewed, with HM Revenue & Customs making enquiries to obtain additional information. There are no material ongoing enquiries in relation to filed UK returns. In other jurisdictions the Company is no longer subject to examinations prior to 2002.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 136, 172

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 43, 44, 45, 46, 47, 48, 49

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

+ Details

Discontinued operations

12 Months Ended

Dec. 31, 2011

Net Gain (Loss) on Disposal of Operations and Discontinued operations [Abstract]

DISCONTINUED OPERATIONS


8.	DISCONTINUED OPERATIONS

On December 31, 2011, the Company disposed of Global Special Risks, LLC, Faber & Dumas Canada Ltd and the trade and assets of Maclean, Oddy & Associates, Inc.. Gross proceeds were $15 million.

The net assets at December 31, 2011 were $11 million, of which $9 million related to identifiable intangible assets and goodwill. In addition, there were costs and income taxes relating to the transaction of $2 million. The gain (net of tax) on this disposal was $2 million.

Amounts of revenue and pre-tax income reported in discontinued operations include the following:


	Years ended December 31,
	2011			2010		2009
	(millions)

Revenues	$	8		$	7	$	19

Income before income taxes		(1	)		—		6
Income taxes		—			—		(2	)

Income from discontinued operations	$	(1	)	$	—	$	4
Gain on disposal of discontinued operations, net of tax		2			—		—

Discontinued operations, net of tax	$	1		$	—	$	4

Net assets and liabilities of discontinued operations consist of the following:


	At
	December 31,
	2011
	(millions)

Cash and cash equivalents	$	1
Fiduciary assets		17
Goodwill		3
Other intangible assets, net		6
Other current assets		2

Total assets		29

Fiduciary liabilities		(17	)
Other current liabilities		(1	)

Total liabilities		(18	)

Net assets of discontinued operations	$	11

Earnings Per Share

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

EARNINGS PER SHARE


9.	EARNINGS PER SHARE

Basic and diluted earnings per share are calculated by dividing net income attributable to Willis Group Holdings by the average number of shares outstanding during each period. The computation of diluted earnings per share reflects the potential dilution that could occur if dilutive securities and other contracts to issue shares were exercised or converted into shares or resulted in the issue of shares that then shared in the net income of the Company.

For the year ended December 31, 2011, time-based and performance-based options to purchase 9.2 million and 7.3 million (2010: 11.5 million and 9.4 million; 2009: 13.4 million and 8.9 million) shares, respectively, and 1.2 million restricted stock units (2010: 1.8 million; 2009: 2.2 million), were outstanding.

Basic and diluted earnings per share are as follows:


	Years ended December 31,
	2011			2010			2009
	(millions, except per share data)

Net income attributable to Willis Group Holdings	$	204		$	455		$	438

Basic average number of shares outstanding		173			170			168
Dilutive effect of potentially issuable shares		3			1			1

Diluted average number of shares outstanding		176			171			169

Basic earnings per share:
Continuing operations	$	1.17		$	2.68		$	2.58
Discontinued operations		0.01			—			0.03

Net income attributable to Willis Group Holdings shareholders	$	1.18		$	2.68		$	2.61

Dilutive effect of potentially issuable shares		(0.02	)		(0.02	)		(0.02	)

Diluted earnings per share:
Continuing operations	$	1.15		$	2.66		$	2.57
Discontinued operations		0.01			—			0.02

Net income attributable to Willis Group Holdings shareholders	$	1.16		$	2.66		$	2.59

Options to purchase 4.1 million shares for the year ended December 31, 2011 were not included in the computation of the dilutive effect of stock options because the effect was antidilutive (2010: 13.9 million shares; 2009: 16.1 million shares).

- Definition

The entire disclosure for earnings per share.

+ References+ Details

Fixed Assets, Net

12 Months Ended

Dec. 31, 2011

Fixed Assets, Net [Abstract]

FIXED ASSETS, NET


11.	FIXED ASSETS, NET

An analysis of fixed asset activity for the years ended December 31, 2011 and 2010 are as follows:


	Land and			Leasehold			Furniture and
	buildings⁽ⁱ⁾			improvements			equipment			Total
	(millions)

Cost: at January 1, 2010	$	51		$	184		$	473		$	708
Additions		24			13			69			106
Disposals		—			(4	)		(45	)		(49	)
Foreign exchange		(2	)		(1	)		(9	)		(12	)

Cost: at December 31, 2010		73			192			488			753
Additions		—			24			87			111
Disposals		—			(13	)		(52	)		(65	)
Foreign exchange		—			7			(14	)		(7	)

Cost: at December 31, 2011	$	73		$	210		$	509		$	792


Depreciation: at January 1, 2010	$	(24	)	$	(46	)	$	(286	)	$	(356	)
Depreciation expense provided⁽ⁱⁱ⁾		(2	)		(12	)		(49	)		(63	)
Disposals		—			2			39			41
Foreign exchange		1			—			5			6

Depreciation: at December 31, 2010		(25	)		(56	)		(291	)		(372	)
Depreciation expense provided⁽ⁱⁱ⁾		(3	)		(15	)		(58	)		(76	)
Disposals		—			13			45			58
Foreign exchange		—			(3	)		7			4

Depreciation: at December 31, 2011	$	(28	)	$	(61	)	$	(297	)	$	(386	)

Net book value:
At December 31, 2010	$	48		$	136		$	197		$	381

At December 31, 2011	$	45		$	149		$	212		$	406


⁽ⁱ⁾		Included within land and buildings are assets held under capital leases. At December 31, 2011, cost and accumulated depreciation were $23 million and $2 million respectively (2010: $23 million and $1 million, respectively; 2009 $nil and $nil, respectively). Depreciation in the year ended December 31, 2011 was $1 million (2010: $1 million; 2009: $nil).

⁽ⁱⁱ⁾		The depreciation charge for the year ended December 31, 2011 includes an element that is disclosed in salaries and benefits, separate to the depreciation charge line, of $2 million (2010: $nil).

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

+ References+ Details

Goodwill

12 Months Ended

Dec. 31, 2011

Goodwill and Other Intangible Assets, Net [Abstract]

GOODWILL


12.	GOODWILL

Goodwill represents the excess of the cost of businesses acquired over the fair market value of identifiable net assets at the dates of acquisition. Goodwill is not amortized but is subject to impairment testing annually and whenever facts or circumstances indicate that the carrying amounts may not be recoverable.

The Company’s annual goodwill impairment test for 2011 has not resulted in an impairment charge (2010: $nil; 2009: $nil).

When a business entity is sold, goodwill is allocated to the disposed entity based on the fair value of that entity compared to the fair value of the reporting unit in which it is included.

The changes in the carrying amount of goodwill by operating segment for the years ended December 31, 2011 and 2010 are as follows:


				North
	Global			America			International			Total
	(millions)

Balance at January 1, 2010	$	1,065		$	1,780		$	432		$	3,277
Purchase price allocation adjustments		—			6			—			6
Other movements⁽ⁱ⁾		—			(3	)		—			(3	)
Foreign exchange		(2	)		—			16			14

Balance at December 31, 2010	$	1,063		$	1,783		$	448		$	3,294
Purchase price allocation adjustments		—			—			2			2
Goodwill acquired during the period		—			—			10			10
Goodwill disposed of during the year		—			(3	)		—			(3	)
Other movements ^{(i) (ii)}		60			2			(61	)		1
Foreign exchange		(1	)		—			(8	)		(9	)

Balance at December 31, 2011	$	1,122		$	1,782		$	391		$	3,295


⁽ⁱ⁾		North America — $(1) million (2010: $3 million) tax benefit arising on the exercise of fully vested HRH stock options which were issued as part of the acquisition of HRH in 2008.

⁽ⁱⁱ⁾		Effective January 1, 2011, the Company changed its internal reporting structure: Global Markets International, previously reported within the International segment, is now reported in the Global segment; and Mexico Retail, which was previously reported within the International segment, is now reported in the North America segment. As a result of these changes, goodwill of $60 million has been reallocated from the International segment into the Global segment for Global Markets International, and $1 million has been reallocated from the International segment into the North America segment for Mexico Retail. Goodwill has been reallocated between segments using the relative fair value allocation approach.

Other Intangible Assets, Net

12 Months Ended

Dec. 31, 2011

Goodwill and Other Intangible Assets, Net [Abstract]

OTHER INTANGIBLE ASSETS, NET


13.	OTHER INTANGIBLE ASSETS, NET

Other intangible assets are classified into the following categories:


•	‘Customer and Marketing Related’, including


	•	client relationships,

	•	client lists,

	•	non-compete agreements,

	•	trade names; and


•	‘Contract based, Technology and Other’ includes all other purchased intangible assets.

The major classes of amortizable intangible assets are as follows:


	December 31, 2011							December 31, 2010
	Gross carrying		Accumulated					Gross carrying		Accumulated
	amount		amortization			Net carrying amount		amount		amortization			Net carrying amount
	(millions)

Customer and Marketing Related:
Client Relationships	$	686	$	(269	)	$	417	$	695	$	(207	)	$	488
Client Lists		8		(7	)		1		9		(7	)		2
Non-compete Agreements		36		(36	)		—		36		(36	)		—
Trade Names		11		(10	)		1		11		(10	)		1

Total Customer and Marketing Related		741		(322	)		419		751		(260	)		491

Contract based, Technology and Other		4		(3	)		1		4		(3	)		1

Total amortizable intangible assets	$	745	$	(325	)	$	420	$	755	$	(263	)	$	492

The aggregate amortization of intangible assets for the year ended December 31, 2011 was $68 million (2010: $82 million; 2009: $100 million). The estimated aggregate amortization of intangible assets for each of the next five years ended December 31 is as follows:


	(millions)

2012	$	61
2013		53
2014		45
2015		38
2016		33
Thereafter		190

Total	$	420

- Definition

The entire disclosure for all or part of the information related to intangible assets.

+ References+ Details

Investments in Associates

12 Months Ended

Dec. 31, 2011

Investments in Associates [Abstract]

INVESTMENTS IN ASSOCIATES


14.	INVESTMENTS IN ASSOCIATES

The Company holds a number of investments which it accounts for using the equity method. The Company’s approximate interest in the outstanding stock of the more significant associates is as follows:

December 31,

Country

2011

2010

Al-Futtaim Willis Co. L.L.C.

Dubai

49%

GS & Cie Groupe

France

30%

31%

The Company’s principal investment as of December 31, 2011 and 2010 is GS & Cie Groupe (‘Gras Savoye’), France’s leading insurance broker.

The Company’s original investment in Gras Savoye was made in 1997, when it acquired a 33 percent ownership interest. Between 1997 and December 2009 this interest was increased by a series of incremental investments to 49 percent.

On December 17, 2009, the Company completed a leveraged transaction with the original family shareholders of Gras Savoye and Astorg Partners, a private equity fund, to reorganize the capital of Gras Savoye (‘December 2009 leveraged transaction’). The Company, the original family shareholders and Astorg now own equal stakes of 30 percent in Gras Savoye and have equal representation of one third of the voting rights on its board. The remaining shareholding is held by a large pool of Gras Savoye managers and minority shareholders.

A put option that was in place prior to the December 2009 leveraged transaction, and which could have increased the Company’s interest to 90 percent, has been canceled and the Company now has a new call option to purchase 100 percent of the capital of Gras Savoye. If the Company does not waive the new call option before April 30, 2014, then it must exercise the new call option in 2015 or the other shareholders may initiate procedures to sell Gras Savoye. Except with the unanimous consent of the supervisory board and other customary exceptions, the parties are prohibited from transferring any shares of Gras Savoye until 2015. At the end of this period, shareholders are entitled to pre-emptive and tag-along rights.

As a result of the December 2009 leveraged transaction the Company recognized a gain of $10 million in the consolidated statement of operations for the year ended December 31, 2009 from the reduction of its interest in Gras Savoye from 49 percent to 31 percent. The Company received total proceeds of $281 million, comprising cash and interest bearing vendor loans and convertible bonds issued by Gras Savoye. See Note 6 — Net Gain (Loss) on Disposal of Operations for an analysis of the proceeds and the calculation of the gain.

In 2011 the Company’s ownership of Gras Savoye reduced from 31 percent to 30 percent following issuance of additional share capital as part of an employee share incentive scheme.

The carrying amount of the Gras Savoye investment as of December 31, 2011 includes goodwill of $82 million (2010: $88 million) and interest bearing vendor loans and convertible bonds issued by Gras Savoye of $43 million and $85 million respectively (2010: $44 million and $78 million, respectively).

A gain of $4 million was recorded in 2011 following conclusion of the accounting for the December 2009 leveraged transaction.

As of December 31, 2011 and 2010, the Company’s other investments in associates, individually and in the aggregate, were not material to the Company’s operations.

Unaudited condensed financial information for associates, in the aggregate, as of and for the three years ended December 31, 2011, is presented below. For convenience purposes: (i) balance sheet data has been translated to US dollars at the relevant year-end exchange rate, and (ii) condensed statements of operations data has been translated to US dollars at the relevant average exchange rate.


	2011			2010			2009
	(millions)

Condensed statements of operations data⁽ⁱ⁾:
Total revenues	$	527		$	510		$	534
Income before income taxes		5			61			96
Net income		(2	)		43			64
Condensed balance sheets data⁽ⁱ⁾:
Total assets		1,882			2,043			2,204
Total liabilities		(1,736	)		(1,825	)		(1,767	)
Stockholders’ equity		(146	)		(218	)		(437	)


⁽ⁱ⁾		Disclosure is based on the Company’s best estimate of the results of its associates and is subject to change upon receipt of their financial statements for 2011.

For the year ended December 31, 2011, the Company recognized $4 million (2010: $5 million; 2009: $12 million) in respect of dividends received from associates.

- Definition

The entire disclosure for equity investment, or group of investments, for which combined disclosure is appropriate, including: (a) the name of each investee and percentage of ownership of common stock, (b) accounting policies for investments in common stock, (c) difference between the amount at which the investment is carried and the amount of underlying equity in net assets and the accounting treatment of the difference, (d) the total fair value of each identified investment for which a market value is available, (e) summarized information as to assets, liabilities, and results of operations of the investees (for investments in unconsolidated subsidiaries, common stock of joint ventures, or other investments using the equity method), and (f) material effects of possible conversions, exercises, or contingent issuances of the investee. Other disclosures include (a) the names of any investee in which the investor owns 20 percent or more of the voting stock and investment is not accounted for using the equity method, and the reasons why not, and (b) the names of any investee in which the investor owns less than 20 percent of the voting stock and the investment is accounted for using the equity method, and the reasons why it is.

+ References+ Details

Pension Plans

12 Months Ended

Dec. 31, 2011

Pension Plans [Abstract]

PENSION PLANS


18.	PENSION PLANS

The Company maintains two principal defined benefit pension plans that cover the majority of our employees in the United States and United Kingdom. Both of these plans are now closed to new entrants. New entrants in the United Kingdom are offered the opportunity to join a defined contribution plan and in the United States are offered the opportunity to join a 401(k) plan. In addition to the Company’s UK and US defined benefit pension plans, the Company has several smaller defined benefit pension plans in certain other countries in which it operates. Elsewhere, pension benefits are typically provided through defined contribution plans. It is the Company’s policy to fund pension costs as required by applicable laws and regulations.

Effective May 15, 2009, the Company closed the US defined benefit plan to future accrual. Consequently, a curtailment gain of $12 million was recognized during the year ended December 31, 2009.

At December 31, 2011, the Company recorded, on the Consolidated Balance Sheets:


•	a pension benefit asset of $145 million (2010: $182 million) representing:


	•	$136 million (2010: $179 million) in respect of the UK defined benefit pension plan; and

	•	$9 million (2010: $3 million) in respect of the international defined benefit pension plans.


•	a total liability for pension benefits of $270 million (2010: $167 million) representing:


	•	$258 million (2010: $154 million) in respect of the US defined benefit pension plan; and

	•	$12 million (2010: $13 million) in respect of the international defined benefit pension plans.

UK and US defined benefit plans

The following schedules provide information concerning the Company’s UK and US defined benefit pension plans as of and for the years ended December 31:


	UK Pension Benefits						US Pension Benefits
	2011			2010			2011			2010
	(millions)

Change in benefit obligation:
Benefit obligation, beginning of year	$	1,906		$	1,811		$	756		$	686
Service cost		36			37			—			—
Interest cost		106			100			41			40
Employee contributions		2			2			—			—
Actuarial loss		272			84			127			57
Benefits paid		(72	)		(72	)		(29	)		(27	)
Foreign currency changes		(23	)		(56	)		—			—
Plan amendments		(10	)		—			—			—

Benefit obligations, end of year		2,217			1,906			895			756

Change in plan assets:
Fair value of plan assets, beginning of year		2,085			1,880			602			529
Actual return on plan assets		269			245			34			70
Employee contributions		2			2			—			—
Employer contributions		92			88			30			30
Benefits paid		(72	)		(72	)		(29	)		(27	)
Foreign currency changes		(23	)		(58	)		—			—

Fair value of plan assets, end of year		2,353			2,085			637			602

Funded status at end of year	$	136		$	179		$	(258	)	$	(154	)

Components on the Consolidated Balance Sheets:
Pension benefits asset	$	136		$	179		$	—		$	—
Liability for pension benefits		—			—			(258	)		(154	)

Amounts recognized in accumulated other comprehensive loss consist of:


	UK Pension Benefits						US Pension Benefits
	2011			2010			2011		2010
				(millions)

Net actuarial loss	$	698		$	571		$	303	$	169
Prior service gain		(35	)		(30	)		—		—

The accumulated benefit obligations for the Company’s UK and US defined benefit pension plans were $2,217 million and $895 million, respectively (2010: $1,906 million and $756 million, respectively).

The components of the net periodic benefit cost and other amounts recognized in other comprehensive loss for the UK and US defined benefit plans are as follows:


	Years ended December 31,
	UK Pension Benefits									US Pension Benefits
	2011			2010			2009			2011			2010			2009
							(millions)

Components of net periodic benefit cost:
Service cost	$	36		$	37		$	28		$	—		$	—		$	7
Interest cost		106			100			96			41			40			40
Expected return on plan assets		(161	)		(141	)		(127	)		(44	)		(42	)		(36	)
Amortization of unrecognized prior service gain		(5	)		(5	)		(5	)		—			—			—
Amortization of unrecognized actuarial loss		30			37			33			3			3			8
Curtailment gain		—			—			—			—			—			(12	)

Net periodic benefit cost (income)	$	6		$	28		$	25		$	—		$	1		$	7

Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Net actuarial (gain) loss	$	164		$	(20	)	$	102		$	137		$	29		$	(31	)
Amortization of unrecognized actuarial loss⁽ⁱ⁾		(30	)		(37	)		(33	)		(3	)		(3	)		(12	)
Prior service gain		(10	)		—			—			—			—			—
Amortization of unrecognized prior service gain		5			5			5			—			—			—
Curtailment gain		—			—			—			—			—			12

Total recognized in other comprehensive (loss) income	$	129		$	(52	)	$	74		$	134		$	26		$	(31	)

Total recognized in net periodic benefit cost and other comprehensive income	$	135		$	(24	)	$	99		$	134		$	27		$	(24	)


⁽ⁱ⁾		2009 US Pension Benefits figure includes $4 million due to curtailment.

The estimated net loss and prior service cost for the UK and US defined benefit plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year are:


	UK Pension		US Pension
	Benefits		Benefits
	(millions)

Estimated net loss	$	40	$	8
Prior service gain		6		—

The following schedule provides other information concerning the Company’s UK and US defined benefit pension plans:


	Years ended December 31,
	UK Pension Benefits						US Pension Benefits
	2011			2010			2011			2010

Weighted-average assumptions to determine benefit obligations:
Discount rate		4.8	%		5.5	%		4.6	%		5.6	%
Rate of compensation increase		2.1	%		2.6	%		N/A			N/A

Weighted-average assumptions to determine net periodic benefit cost:
Discount rate		5.5	%		5.8	%		5.6	%		6.1	%
Expected return on plan assets		7.5	%		7.8	%		7.5	%		8.0	%
Rate of compensation increase		2.6	%		2.5	%		N/A			N/A

The expected return on plan assets was determined on the basis of the weighted-average of the expected future returns of the various asset classes, using the target allocations shown below. The expected returns on UK plan assets are: UK and foreign equities 8.80 percent, debt securities 4.52 percent and real estate 6.48 percent. The expected returns on US plan assets are: US and foreign equities 9.25 percent and debt securities 5.25 percent.

The Company’s pension plan asset allocations based on fair values were as follows:


	Years ended December 31,
	UK Pension Benefits						US Pension Benefits
Asset Category	2011			2010			2011			2010

Equity securities		42	%		51	%		43	%		54	%
Debt securities		35	%		24	%		56	%		45	%
Hedge funds		18	%		20	%		—	%		—	%
Real estate		4	%		4	%		—	%		—	%
Cash		1	%		1	%		1	%		1	%

Total		100	%		100	%		100	%		100	%

In the UK the pension trustees in consultation with the Company maintain a diversified asset portfolio and this together with contributions made by the Company is expected to meet the pension scheme’s liabilities as they become due. The UK plan’s assets are divided into 12 separate portfolios according to asset class and managed by 11 investment managers. The broad target allocations are UK and foreign equities (51 percent), debt securities (22 percent), hedge funds (22 percent) and real estate (5 percent). In the US the Company’s investment policy is to maintain a diversified asset portfolio, which together with contributions made by the Company is expected to meet the pension scheme’s liabilities as they become due. The US plan’s assets are currently invested in 11 funds representing most standard equity and debt security classes. The broad target allocations are US and foreign equities (55 percent) and debt securities (45 percent).

Fair Value Hierarchy

The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value:


•	Level 1: refers to fair values determined based on quoted market prices in active markets for identical assets;

•	Level 2: refers to fair values estimated using observable market based inputs or unobservable inputs that are corroborated by market data; and

•	Level 3: includes fair values estimated using unobservable inputs that are not corroborated by market data.

The following tables present, at December 31, 2011 and 2010, for each of the fair value hierarchy levels, the Company’s UK pension plan assets that are measured at fair value on a recurring basis.


	UK Pension Plan
December 31, 2011	Level 1		Level 2			Level 3		Total
			(millions)

Equity securities:
US equities	$	422	$	93		$	—	$	515
UK equities		278		41			—		319
Other equities		15		137			—		152
Fixed income securities:
US Government bonds		—		—			—		—
UK Government bonds		599		—			—		599
Other Government bonds		1		—			—		1
UK corporate bonds		63		—			—		63
Other corporate bonds		23		—			—		23
Derivatives		—		158			—		158
Real estate		—		—			86		86
Cash		28		—			—		28
Other investments:
Hedge funds		—		—			414		414
Other		—		(7	)		2		(5	)

Total	$	1,429	$	422		$	502	$	2,353


	UK Pension Plan
December 31, 2010	Level 1		Level 2			Level 3		Total
			(millions)

Equity securities:
US equities	$	421	$	90		$	—	$	511
UK equities		303		97			—		400
Other equities		—		149			—		149
Fixed income securities:
US Government bonds		49		—			—		49
UK Government bonds		348		—			—		348
Other Government bonds		17		—			—		17
UK corporate bonds		57		—			—		57
Other corporate bonds		14		—			—		14
Derivatives		—		22			—		22
Real estate		—		—			83		83
Cash		31		—			—		31
Other investments:
Hedge funds		—		—			415		415
Other		—		(13	)		2		(11	)

Total	$	1,240	$	345		$	500	$	2,085

The UK plan’s real estate investment comprises UK property and infrastructure investments which are valued by the fund manager taking into account cost, independent appraisals and market based comparable data. The UK plan’s hedge fund investments are primarily invested in various ‘fund of funds’ and are valued based on net asset values calculated by the fund and are not publicly available. Liquidity is typically monthly and is subject to liquidity of the underlying funds.

The following tables present, at December 31, 2011 and 2010, for each of the fair value hierarchy levels, the Company’s US pension plan assets that are measured at fair value on a recurring basis.


	US Pension Plan
December 31, 2011	Level 1		Level 2		Level 3		Total
			(millions)

Equity securities:
US equities	$	172	$	—	$	—	$	172
Non US equities		106		—		—		106
Fixed income securities:
US Government bonds		—		55		—		55
US corporate bonds		—		252		—		252
Non US Government bonds		48		—		—		48
Cash		—		4		—		4
Other investments:
Other		—		—		—		—

Total	$	326	$	311	$	—	$	637


	US Pension Plan
December 31, 2010	Level 1		Level 2			Level 3		Total
			(millions)

Equity securities:
US equities	$	201	$	—		$	—	$	201
Non US equities		127		—			—		127
Fixed income securities:
US Government bonds		112		—			—		112
US corporate bonds		111		—			—		111
Non US Government bonds		47		—			—		47
Cash		—		5			—		5
Other investments:
Other		—		(1	)		—		(1	)

Total	$	598	$	4		$	—	$	602

Equity securities comprise:


•	common stock and preferred stock which are valued using quoted market prices; and

•	pooled investment vehicles which are valued at their net asset values as calculated by the investment manager and typically have daily or weekly liquidity.

Fixed income securities comprise US, UK and other Government Treasury Bills, loan stock, index linked loan stock and UK and other corporate bonds which are typically valued using quoted market prices.

As a result of the inherent limitations related to the valuations of the Level 3 investments, due to the unobservable inputs of the underlying funds, the estimated fair value may differ significantly from the values that would have been used had a market for those investments existed.

The following table summarizes the changes in the UK pension plan’s Level 3 assets for the years ended December 31, 2011 and 2010:


	UK Pension
	Plan
	Level 3
	(millions)

Balance at January 1, 2010	$	328
Purchases, sales, issuances and settlements, net		156
Unrealized gains relating to instruments still held at end of year		22
Foreign exchange		(6	)

Balance at December 31, 2010	$	500
Purchases, sales, issuances and settlements, net		2
Unrealized gains relating to instruments still held at end of year		5
Foreign exchange		(5	)

Balance at December 31, 2011	$	502

In 2012, the Company expects to make contributions to the UK plan approximately equal to those made in 2011 of $92 million, of which approximately $12 million is in respect of salary sacrifice contributions, and $40 million to the US plan.

The following benefit payments, which reflect expected future service, as appropriate, are estimated to be paid by the UK and US defined benefit pension plans:


	UK Pension		US Pension
Expected future benefit payments	Benefits		Benefits
	(millions)

2012	$	73	$	33
2013		76		36
2014		78		39
2015		81		42
2016		82		44
2017-2021		450		256

Willis North America has a 401(k) plan covering all eligible employees of Willis North America and its subsidiaries. The plan allows participants to make pre-tax contributions which the Company, at its discretion may match. During 2009, the Company had decided not to make any matching contributions other than for former HRH employees whose contributions were matched up to 75 percent under the terms of the acquisition. In January 2011, 401(k) matching was reinstated for our US associates. All investment assets of the plan are held in a trust account administered by independent trustees. The Company’s 401(k) matching contributions for 2011 were $10 million (2010: $nil; 2009: $5 million).

International defined benefit pension plans

In addition to the Company’s UK and US defined benefit pension plans, the Company has several smaller defined benefit pension plans in certain other countries in which it operates.

A $3 million net pension benefit liability (2010: $10 million) has been recognized in respect of these schemes.

The following schedules provide information concerning the Company’s international defined benefit pension plans:


	International Pension
	Benefits
	2011			2010
	(millions)

Change in benefit obligation:
Benefit obligation, beginning of year	$	135		$	150
Service cost		4			4
Interest cost		7			7
Actuarial (gain) loss		(4	)		(4	)
Benefits paid		(6	)		(15	)
Curtailment		(1	)		1
Foreign currency changes		(4	)		(8	)

Benefit obligations, end of year		131			135

Change in plan assets:
Fair value of plan assets, beginning of year		125			120
Actual return on plan assets		1			15
Employer contributions		13			12
Benefits paid		(6	)		(15	)
Foreign currency changes		(5	)		(7	)

Fair value of plan assets, end of year		128			125

Funded status at end of year	$	(3	)	$	(10	)

Components on the Consolidated Balance Sheets:
Pension benefits asset	$	9		$	3
Liability for pension benefits	$	(12	)	$	(13	)

Amounts recognized in accumulated other comprehensive loss consist of a net actuarial loss of $10 million (2010: $10 million).

The accumulated benefit obligation for the Company’s international defined benefit pension plans was $128 million (2010: $131 million).

The components of the net periodic benefit cost and other amounts recognized in other comprehensive loss for the international defined benefit plans are as follows:


	International Pension Benefits
	2011			2010			2009
	(millions)

Components of net periodic benefit cost:
Service cost	$	4		$	4		$	6
Interest cost		7			7			8
Expected return on plan assets		(6	)		(6	)		(6	)
Amortization of unrecognized actuarial loss		1			—			2
Curtailment (gain) loss		(1	)		1			—
Other		—			—			—

Net periodic benefit cost	$	5		$	6		$	10

Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Amortization of unrecognized actuarial loss	$	(1	)	$	—		$	(2	)
Net actuarial gain		2			(13	)		(2	)

Total recognized in other comprehensive loss		1			(13	)		(4	)

Total recognized in net periodic benefit cost and other comprehensive (loss) income	$	6		$	(7	)	$	6

The estimated net loss for the international defined benefit plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year is $3 million.

The following schedule provides other information concerning the Company’s international defined benefit pension plans:


	International
	Pension Benefits
	2011		2010

Weighted-average assumptions to determine benefit obligations:
Discount rate		3.30% – 5.30%		4.00% – 5.10%
Rate of compensation increase		2.50% – 3.00%		2.50% – 3.00%
Weighted-average assumptions to determine net periodic benefit cost:
Discount rate		4.00% – 5.10%		5.00% – 5.30%
Expected return on plan assets		4.80% – 5.73%		4.60% – 6.31%
Rate of compensation increase		2.50% – 3.00%		2.00% – 3.00%

The determination of the expected long-term rate of return on the international plan assets is dependent upon the specific circumstances of each individual plan. The assessment may include analyzing historical investment performance, investment community forecasts and current market conditions to develop expected returns for each asset class used by the plans.

The Company’s international pension plan asset allocations at December 31, 2011 based on fair values were as follows:


	International
	Pension Benefits
Asset Category	2011			2010

Equity securities		35	%		44	%
Debt securities		58	%		42	%
Real estate		4	%		4	%
Other		3	%		10	%

Total		100	%		100	%

The investment policies for the international plans vary by jurisdiction but are typically established by the local pension plan trustees, where applicable, and seek to maintain the plans’ ability to meet liabilities of the plans as they fall due and to comply with local minimum funding requirements.

Fair Value Hierarchy

The following tables present, at December 31, 2011 and 2010, for each of the fair value hierarchy levels, the Company’s international pension plan assets that are measured at fair value on a recurring basis.


	International Pension Plans
December 31, 2011	Level 1		Level 2		Level 3		Total
			(millions)

Equity securities:
US equities	$	20	$	—	$	—	$	20
UK equities		4		—		—		4
Overseas equities		18		—		1		19
Unit linked funds		—		—		—		—
Fixed income securities:
Other Government bonds		48		1		—		49
Real estate		—		—		5		5
Cash		4		—		—		4
Other investments:
Derivative instruments		—		22		—		22
Other investments		—		—		5		5

Total	$	94	$	23	$	11	$	128


	International Pension Plans
December 31, 2010	Level 1		Level 2		Level 3		Total
			(millions)

Equity securities:
US equities	$	21	$	—	$	—	$	21
UK equities		4		—		—		4
Overseas equities		20		—		—		20
Unit linked funds		7		—		—		7
Fixed income securities:
Other Government bonds		29		2		—		31
Real estate		—		—		5		5
Cash		11		—		—		11
Other investments:
Derivative instruments		—		21		—		21
Other investments		—		—		5		5

Total	$	92	$	23	$	10	$	125

Equity securities comprise:


•	common stock which are valued using quoted market prices; and

•	unit linked funds which are valued at their net asset values as calculated by the investment manager and typically have daily liquidity.

Fixed income securities comprise overseas Government loan stock which is typically valued using quoted market prices. Real estate investment comprises overseas property and infrastructure investments which are valued by the fund manager taking into account cost, independent appraisals and market based comparable data. Derivative instruments are valued using an income approach typically using swap curves as an input.

Assets classified as Level 3 investments did not materially change during the year ended December 31, 2011.

In 2012, the Company expects to contribute $12 million to the international plans.

The following benefit payments, which reflect expected future service, as appropriate, are estimated to be paid by the international defined benefit pension plans:


	International
	Pension
Expected future benefit payments	Benefits
	(millions)

2012	$	3
2013		4
2014		4
2015		4
2016		4
2017-2021		23

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Implementation Guide (Q and A)

-Number FAS88

-Paragraph 63

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-URI http://asc.fasb.org/topic&trid=2235017

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 158

-Paragraph 7, 21, 22

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5, 6, 7, 8

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph h

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph q

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-Publisher FASB

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-Number 132R

-Paragraph 8

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-Number 106

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-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 264

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-Name Accounting Principles Board Opinion (APB)

-Number 30

-Paragraph 26

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+ Details

Debt

12 Months Ended

Dec. 31, 2011

Debt [Abstract]

DEBT


19.	DEBT

Short-term debt and current portion of the long-term debt consists of the following:


	December 31,
	2011		2010
	(millions)

Current portion of 5-year term loan facility expires 2016	$	11	$	—
Current portion of 5-year term loan facility repaid 2011		—		110
6.000% loan notes due 2012		4		—

	$	15	$	110

Long-term debt consists of the following:


	December 31,
	2011		2010
	(millions)

5-year term loan facility expires 2016	$	289	$	—
5-year term loan facility repaid 2011		—		301
Revolving $300 million credit facility		—		90
6.000% loan notes due 2012		—		4
5.625% senior notes due 2015		350		350
Fair value adjustment on 5.625% senior notes due 2015		20		12
12.875% senior notes due 2016		—		500
4.125% senior notes due 2016		299		—
6.200% senior notes due 2017		600		600
7.000% senior notes due 2019		300		300
5.750% senior notes due 2021		496		—

	$	2,354	$	2,157

Until December 22, 2010, all direct obligations under the 5.625%, 6.200% and 7.000% senior notes were guaranteed by Willis Group Holdings, Willis Netherlands B.V., Willis Investment UK Holdings Limited, TA I Limited, TA II Limited, TA III Limited, Trinity Acquisition plc, TA IV Limited and Willis Group Limited.

On that date and in connection with a group reorganization, TA II Limited, TA III Limited and TA IV Limited transferred their obligations as guarantors to the other Guarantor Companies. TA II Limited, TA III Limited and TA IV Limited entered member’s voluntary liquidation on December 31, 2010.

Debt issuance

In December 2011 we refinanced our bank facility, comprising a 5-year $300 million term loan and a 5-year $500 million revolving credit facility. The $300 million term loan replaces the $328 million balance on our $700 million 5-year term loan facility and the $500 million revolving facility replaces our $300 million and our $200 million revolving credit facilities. Unamortized debt issuance costs of $10 million relating to these facilities were written off in December 2011 following completion of the refinancing. In 2011, we made $83 million of mandatory repayments against the 5-year term loan before repaying the $328 million balance in December 2011.

The 5-year term loan facility expiring 2016 bears interest at LIBOR plus 1.50% and is repayable in quarterly installments and a final repayment of $225 million is due in the fourth quarter of 2016. Drawings under the new revolving $500 million credit facility bear interest at LIBOR plus 1.50% and the facility expires on December 16, 2016. As of December 31, 2011 $nil was outstanding under the revolving credit facility. These margins apply while the Company’s debt rating remains BBB-/Baa3.

The agreements relating to our 5-year term loan facility expiring 2016 and the revolving $500 million credit facility contain requirements to maintain maximum levels of consolidated funded indebtedness in relation to consolidated EBITDA and minimum level of consolidated EBITDA to consolidated cash interest expense, subject to certain adjustments. In addition, the agreements relating to our credit facilities and senior notes include, in the aggregate covenants relating to the delivery of financial statements, reports and notices, limitations on liens, limitations on sales and other disposals of assets, limitations on indebtedness and other liabilities, limitations on sale and leaseback transactions, limitations on mergers and other fundamental changes, maintenance of property, maintenance of insurance, nature of business, compliance with applicable laws, maintenance of corporate existence and rights, payment of taxes and access to information and properties. At December 31, 2011, the Company was in compliance with all covenants.

In March 2011, the Company issued $300 million of 4.125% senior notes due 2016 and $500 million of 5.750% senior notes due 2021. The effective interest rates of these senior notes are 4.240% and 5.871% respectively, which include the impact of the discount upon issuance. The proceeds were used to repurchase and redeem $500 million of 12.875% senior notes due 2016 including a make-whole payment (representing a slight discount to the contractual make-whole amount) of $158 million. Following the repurchase the Company wrote off $13 million of unamortized debt issuance costs.

During the year ended December 31, 2010, the Company entered into a series of interest rate swaps for a total notional amount of $350 million to receive a fixed rate and pay a variable rate on a semi-annual basis, with a maturity date of July 15, 2015. The Company has designated and accounts for these instruments as fair value hedges against its $350 million 5.625% senior notes due 2015. The fair values of the interest rate swaps are included within other assets or other liabilities and the fair value of the hedged element of the senior notes is included within long-term debt.

On June 22, 2010, a further revolving facility of $20 million was put in place which bears interest at LIBOR plus 1.700% until 2012 and LIBOR plus 1.850% thereafter. The facility expires on December 22, 2012. As at December 31, 2011 no drawings had been made on the facility. This facility is solely for the use of our main UK regulated entity and would be available in certain exceptional circumstances. The facility is secured against the freehold of the UK regulated entity’s freehold property in Ipswich.

Lines of credit

The Company also has available $3 million (2010: $2 million) in lines of credit, of which $nil was drawn as of December 31, 2011 (2010: $nil).

Analysis of interest expense

The following table shows an analysis of the interest expense for the years ended December 31:


	Year ended December 31,
	2011		2010		2009
	(millions)

5-year term loan facility repaid 2011	$	14	$	17	$	26
Revolving $300 million credit facility		4		3		3
5.625% senior notes due 2015		12		14		20
12.875% senior notes due 2016		15		67		55
4.125% senior notes due 2016		10		—		—
6.200% senior notes due 2017		38		38		38
7.000% senior notes due 2019		21		21		5
5.125% senior notes due 2010		—		3		16
5.750% senior notes due 2021		23		—		—
Interim credit facility		—		—		7
Other⁽ⁱ⁾		19		3		4

Total interest expense	$	156	$	166	$	174


⁽ⁱ⁾		Other includes $10 million relating to the write off of unamortized debt issuance fees.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References+ Details

Provisions for Liabilities

12 Months Ended

Dec. 31, 2011

Provisions for Liabilities [Abstract]

PROVISIONS FOR LIABILITIES


20.	PROVISIONS FOR LIABILITIES

An analysis of movements on provisions for liabilities is as follows:


	Claims,
	lawsuits and
	other			Other
	proceedings⁽ⁱ⁾			provisions⁽ⁱⁱ⁾			Total
				(millions)

Balance at January 1, 2010	$	178		$	48		$	226
Net provisions made during the year		19			(7	)		12
Utilised in the year		(50	)		(7	)		(57	)
Foreign currency translation adjustment		(2	)		—			(2	)

Balance at December 31, 2010	$	145		$	34		$	179
Net provisions made during the year		45			11			56
Utilised in the year		(31	)		(7	)		(38	)
Foreign currency translation adjustment		(1	)		—			(1	)

Balance at December 31, 2011	$	158		$	38		$	196


⁽ⁱ⁾		The claims, lawsuits and other proceedings provision includes E&O cases which represents management’s assessment of liabilities that may arise from asserted and unasserted claims for alleged errors and omissions that arise in the ordinary course of the Group’s business. Where some of the potential liability is recoverable under the Group’s external insurance arrangements, the full assessment of the liability is included in the provision with the associated insurance recovery shown separately as an asset. Insurance recoveries recognised at December 31, 2011 amounted to $6 million (2010: $15 million).


⁽ⁱⁱ⁾		The ‘Other’ category includes amounts relating to vacant property provisions of $20 million (2010: $14 million).

Commitments and Contingencies

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies [Abstract]

COMMITMENTS AND CONTINGENCIES


21.	COMMITMENTS AND CONTINGENCIES

The Company’s contractual obligations as at December 31, 2011 are presented below:


					Payments due by
Obligations	Total		2012		2013-2014		2015-2016		After 2016
	(millions)

5-year term loan facility expires 2016	$	300	$	11	$	30	$	259	$	—
Interest on term loan		28		6		12		10		—
Revolving $500 million credit facility commitment fees		6		1		3		2		—
6.000% loan notes due 2012		4		4		—		—		—
5.625% senior notes due 2015		350		—		—		350		—
Fair value adjustments on 5.625% senior notes due 2015		20		—		—		20		—
4.125% senior notes due 2016		300		—		—		300		—
6.200% senior notes due 2017		600		—		—		—		600
7.000% senior notes due 2019		300		—		—		—		300
5.750% senior notes due 2021		500		—		—		—		500
Interest on senior notes		744		119		238		200		187

Total debt and related interest		3,152		141		283		1,141		1,587
Operating leases⁽ⁱ⁾		1,307		146		203		151		807
Pensions		386		91		181		114		—
Other contractual obligations⁽ⁱⁱ⁾		164		72		13		37		42

Total contractual obligations	$	5,009	$	450	$	680	$	1,443	$	2,436


⁽ⁱ⁾		Presented gross of sublease income.


⁽ⁱⁱ⁾		Other contractual obligations include capital lease commitments, put option obligations and investment fund capital call obligations, the timing of which are included at the earliest point they may fall due.

Debt obligations and facilities

The Company’s debt and related interest obligations at December 31, 2011 are shown in the above table.

During 2011, the Company entered into a new revolving credit facility agreement under which $500 million is available. As at December 31, 2011 $nil was outstanding under the revolving credit facility.

This facility is in addition to the remaining availability of $20 million under the Company’s previously existing $20 million revolving credit facility.

The only mandatory repayments of debt over the next 12 months are the scheduled repayment of $11 million current portion of the Company’s 5-year term loan and the final payment of the 6.000% loan notes. We also have the right, at our option, to prepay indebtedness under the credit facility without further penalty and to redeem the senior notes at our option by paying a ‘make whole’ premium as provided under the applicable debt instrument.

Operating leases

The Company leases certain land, buildings and equipment under various operating lease arrangements. Original non-cancellable lease terms typically are between 10 and 20 years and may contain escalation clauses, along with options that permit early withdrawal. The total amount of the minimum rent is expensed on a straight-line basis over the term of the lease.

As of December 31, 2011, the aggregate future minimum rental commitments under all non-cancellable operating lease agreements are as follows:


	Gross rental		Rentals from			Net rental
	commitments		subleases			commitments
			(millions)

2012	$	146	$	(14	)	$	132
2013		109		(14	)		95
2014		94		(13	)		81
2015		79		(12	)		67
2016		72		(11	)		61
Thereafter		807		(32	)		775

Total	$	1,307	$	(96	)	$	1,211

The Company leases its main London building under a 25-year operating lease, which expires in 2032. The Company’s contractual obligations in relation to this commitment included in the table above total $715 million (2010: $744 million). Annual rentals are $30 million (2010: $31 million) per year and the Company has subleased approximately 29 percent (2010: 25 percent) of the premises under leases up to 15 years. The amounts receivable from subleases, included in the table above, total $82 million (2010: $87 million; 2009: $100 million).

Rent expense amounted to $127 million for the year ended December 31, 2011 (2010: $131 million; 2009: $154 million). The Company’s rental income from subleases was $18 million for the year ended December 31, 2011 (2010: $22 million; 2009: $21 million).

Pensions

Contractual obligations for our pension plans reflect the contributions we expect to make over the next five years into our US and UK plans. These contributions are based on current funding positions and may increase or decrease dependent on the future performance of the two plans.

In the UK, we are required to agree a funding strategy for our UK defined benefit plan with the plan’s trustees. In February 2009, we agreed to make full year contributions to the UK plan of $39 million for 2009 through 2012, excluding amounts in respect of the salary sacrifice scheme. In addition, if certain funding targets were not met at the beginning of any of the following years, 2010 through 2012, a further contribution of $39 million would be required for that year. In 2010, the additional funding requirement was triggered and we expect to make a similar additional contribution in 2011. A similar, additional contribution may also be required for 2012, depending on actual performance against funding targets at the beginning of 2012.

Based on the current UK funding strategy and as shown in the table above, the total contracted contributions for all plans are currently estimated to be approximately $91 million in 2012, excluding amounts of approximately $12 million in respect of the salary sacrifice scheme. However, a revised UK funding strategy, and hence 2012 contribution, is expected to be finalized shortly and the final 2012 contribution for all plans is expected to be approximately $142 million, including salary sacrifice.

Guarantees

Guarantees issued by certain of Willis Group Holdings’ subsidiaries with respect to the senior notes and revolving credit facilities are discussed in Note 19 — Debt in these consolidated financial statements.

Certain of Willis Group Holdings’ subsidiaries have given the landlords of some leasehold properties occupied by the Company in the United Kingdom and the United States guarantees in respect of the performance of the lease obligations of the subsidiary holding the lease. The operating lease obligations subject to such guarantees amounted to $828 million and $855 million at December 31, 2011 and 2010, respectively.

In addition, the Company has given guarantees to bankers and other third parties relating principally to letters of credit amounting to $7 million and $11 million at December 31, 2011 and 2010, respectively. Willis Group Holdings also guarantees certain of its UK and Irish subsidiaries’ obligations to fund the UK and Irish defined benefit plans.

Other contractual obligations

For certain subsidiaries and associates, the Company has the right to purchase shares (a call option) from co-shareholders at various dates in the future. In addition, the co-shareholders of certain subsidiaries and associates have the right to sell their shares (a put option) to the Company at various dates in the future. Generally, the exercise price of such put options and call options is formula-based (using revenues and earnings) and is designed to reflect fair value. Based on current projections of profitability and exchange rates and assuming the put options are exercised, the potential amount payable from these options is not expected to exceed $72 million (2010: $40 million).

In July 2010, the Company made a capital commitment of $25 million to Trident V Parallel Fund, LP, an investment fund managed by Stone Point Capital. This replaced a capital commitment of $25 million that had been made to Trident V, LP in December 2009. As at December 31, 2011 there have been approximately $6 million of capital contributions.

In May 2011, the Company made a capital commitment of $10 million to Dowling Capital Partners I, LP. As at December 31, 2011 there had been no capital contributions.

Other contractual obligations at December 31, 2011 also include the capital lease on the Company’s Nashville property of $63 million, payable from 2012 onwards.

Claims, Lawsuits and Other Proceedings

In the ordinary course of business, the Company is subject to various actual and potential claims, lawsuits, and other proceedings relating principally to alleged errors and omissions in connection with the placement of insurance and reinsurance. Similar to other corporations, the Company is also subject to a variety of other claims, including those relating to the Company’s employment practices. Some of the claims, lawsuits and other proceedings seek damages in amounts which could, if assessed, be significant.

Errors and omissions claims, lawsuits, and other proceedings arising in the ordinary course of business are covered in part by professional indemnity or other appropriate insurance. The terms of this insurance vary by policy year and self-insured risks have increased significantly in recent years. Regarding self-insured risks, the Company has established provisions which are believed to be adequate in the light of current information and legal advice, and the Company adjusts such provisions from time to time according to developments.

On the basis of current information, the Company does not expect that the actual claims, lawsuits and other proceedings, to which the Company is subject, or potential claims, lawsuits, and other proceedings relating to matters of which it is aware, will ultimately have a material adverse effect on the Company’s financial condition, results of operations or liquidity. Nonetheless, given the large or indeterminate amounts sought in certain of these actions, and the inherent unpredictability of litigation and disputes with insurance companies, it is possible that an adverse outcome in certain matters could, from time to time, have a material adverse effect on the Company’s results of operations or cash flows in particular quarterly or annual periods.

The material actual or potential claims, lawsuits and other proceedings, of which the Company is currently aware, are:

Assurance of Discontinuance

In connection with the investigation launched by the New York State Attorney General in April 2004 concerning, among other things, contingent commissions paid by insurers to insurance brokers, in April 2005, the Company entered into an Assurance of Discontinuance (‘Original AOD’) with the New York State Attorney General and the Superintendent of the New York Insurance Department and paid $50 million to eligible clients. As part of the Original AOD, the Company also agreed not to accept contingent compensation and to disclose to customers any compensation the Company will receive in connection with providing policy placement services to the customer. The Company also resolved similar investigations launched by the Minnesota Attorney General, the Florida Attorney General, the Florida Department of Financial Services, and the Florida Office of Insurance Regulation for amounts that were not material to the Company.

Similarly, in August 2005, HRH entered into an agreement with the Attorney General of the State of Connecticut and the Insurance Commissioner of the State of Connecticut to resolve all issues related to their investigations into certain insurance brokerage and insurance agency practices and to settle a lawsuit brought in August 2005 by the Connecticut Attorney General alleging violations of the Connecticut Unfair Trade Practices Act and the Connecticut Unfair Insurance Practices Act. As part of this settlement, HRH agreed to take certain actions including establishing a $30 million national fund for distribution to certain clients; enhancing disclosure practices for agency and broker clients; and declining to accept contingent compensation on brokerage business.

On February 16, 2010, the Company entered into the Amended and Restated Assurance of Discontinuance with the Attorney General of the State of New York and the Amended and Restated Stipulation with the Superintendent of Insurance of the State of New York (the ‘Amended and Restated AOD’) on behalf of itself and its named subsidiaries. The Amended and Restated AOD was effective February 11, 2010 and supersedes and replaces the Original AOD.

The Amended and Restated AOD specifically recognizes that the Company has substantially met its obligations under the Original AOD and ends many of the requirements previously imposed. It relieves the Company of a number of technical compliance obligations that have imposed significant administrative and financial burdens on its operations. The Amended and Restated AOD no longer limits the types of compensation the Company can receive and has lowered the compensation disclosure requirements. The Amended and Restated AOD requires the Company, among other things to: (i) in New York, and each of the other 49 states of the United States, the District of Columbia and U.S. territories, provide compensation disclosure that will, at a minimum, comply with the terms of the applicable regulations, as may be amended from time to time, or the provisions of the AOD that existed prior to the adoption of the Amended and Restated AOD; and (ii) maintain its compliance programs and continue to provide appropriate training to relevant employees in business ethics, professional obligations, conflicts of interest, and antitrust and trade practices compliance.

European Commission Sector Inquiry

In 2006, the European Commission issued questionnaires pursuant to its Sector Inquiry or, in respect of Norway, the European Free Trade Association Surveillance Authority, related to insurance business practices, including compensation arrangements for brokers, to at least 150 European brokers including our operations in nine European countries. The Company filed responses to the European Commission and the European Free Trade Association Surveillance Authority questionnaires. The European Commission reported on September 25, 2007, expressing concerns over potential conflicts of interest in the industry relating to remuneration and binding authorities and also over the nature of the coinsurance market.

The Company cooperated with both the European Free Trade Association Surveillance Authority and the European Commission to resolve issues raised in its final report regarding coinsurance as required of the industry by the European Commission. The European Commission has appointed Ernst & Young to conduct a review of the coinsurance market and we anticipate that, along with our competitors and insurers, our European subsidiaries will receive further questionnaires on this matter this year.

Contingent Compensation Class Action

Since August 2004, the Company and HRH (along with various other brokers and insurers) have been named as defendants in purported class actions in various courts across the United States. All of these actions have been consolidated into a single action in the US District Court for the District of New Jersey (‘MDL’). These actions allege that the brokers breached their duties to their clients by entering into contingent compensation agreements with either no disclosure or limited disclosure to clients and participated in other improper activities. Plaintiffs seek monetary damages, including punitive damages, and certain equitable relief. In May 2011, the majority of defendants, including the Company and HRH, entered into a written settlement agreement with plaintiffs. On June 28, 2011, the Judge entered an Order granting preliminary approval to the settlement agreement. Notice of the settlement was sent to all members of the class and each member was given the opportunity to opt out of the settlement and pursue its own individual claim against any defendant. A total of 84 members of the class have opted out of the settlement. A Fairness Hearing to decide if the settlement should be given final approval took place on September 14, 2011, but the Judge has not yet issued his decision on approval of the settlement. The amount of the proposed settlement to be paid by the Company and HRH is immaterial and was previously reserved.

Additional actions could be brought in the future by individual policyholders. The Company disputes the allegations in all of these suits and has been and intends to continue to defend itself vigorously against these actions. The outcomes of these lawsuits, however, including any losses or other payments that may occur as a result, cannot be predicted at this time.

Gender Discrimination Class Action

In December 2006, a purported class action was filed against the Company in the United States District Court, Southern District of New York, alleging that the Company discriminated against female officers and officer equivalent employees on the basis of their gender and seeking injunctive relief, monetary damages and attorneys’ fees and costs. In January 2011, the Company reached a settlement with plaintiffs that resolves all individual and class claims. The amount of this settlement is not material. The Court has given preliminary approval to the settlement. Notice of that settlement has been provided to the class members and the Court held a Fairness Hearing on December 12, 2011 to decide if final approval should be given to the settlement. On December 19, 2011, the Court granted final approval of the settlement, and the settlement payments are being distributed to class members.

World Trade Center

The Company acted as the insurance broker, but not as an underwriter, for the placement of both property and casualty insurance for a number of entities which were directly impacted by the September 11, 2001 destruction of the World Trade Center complex, including Silverstein Properties LLC, which acquired a 99-year leasehold interest in the twin towers and related facilities from the Port Authority of New York and New Jersey in July 2001. Although the World Trade Center complex insurance was bound at or before the July 2001 closing of the leasehold acquisition, consistent with standard industry practice, the final policy wording for the placements was still in the process of being finalized when the twin towers and other buildings in the complex were destroyed on September 11, 2001. There have been a number of lawsuits in the United States between the insured parties and the insurers for several placements. Other disputes may arise in respect of insurance placed by us which could affect the Company including claims by one or more of the insureds that the Company made culpable errors or omissions in connection with our brokerage activities. However, the Company does not believe that our role as broker will lead to liabilities which in the aggregate would have a material adverse effect on our results of operations, financial condition or liquidity.

Stanford Financial Group Litigation

The Company has been named as a defendant in six similar lawsuits relating to the collapse of The Stanford Financial Group (‘Stanford’), for which Willis of Colorado, Inc. acted as broker of record on certain lines of insurance. The complaints in these actions generally allege that the defendants actively and materially aided Stanford’s alleged fraud by providing Stanford with certain letters regarding coverage that they knew would be used to help retain or attract actual or prospective Stanford client investors. The complaints further allege that these letters, which contain statements about Stanford and the insurance policies that the defendants placed for Stanford, contained untruths and omitted material facts and were drafted in this manner to help Stanford promote and sell its allegedly fraudulent certificates of deposit.

The six actions are as follows:


•	Troice, et al. v. Willis of Colorado, Inc., et al., C.A. No. 3:09-CV-01274-N, was filed on July 2, 2009 in the U.S. District Court for the Northern District of Texas against Willis Group Holdings plc, Willis of Colorado, Inc. and a Willis associate, among others. On April 1, 2011, plaintiffs filed the operative Third Amended Class Action Complaint individually and on behalf of a putative, worldwide class of Stanford investors, adding Willis Limited as a defendant and alleging claims under Texas statutory and common law and seeking damages in excess of $1 billion, punitive damages and costs. On May 2, 2011, the defendants filed motions to dismiss the Third Amended Class Action Complaint, arguing, inter alia, that the plaintiffs’ claims are precluded by the Securities Litigation Uniform Standards Act of 1998 (‘SLUSA’).

•	Ranni v. Willis of Colorado, Inc., et al., C.A. No. 09-22085, was filed on July 17, 2009 against Willis Group Holdings plc and Willis of Colorado, Inc. in the U.S. District Court for the Southern District of Florida. The complaint was filed on behalf of a putative class of Venezuelan and other South American Stanford investors and alleges claims under Section 10(b) of the Securities Exchange Act of 1934 (and Rule 10b-5 thereunder) and Florida statutory and common law and seeks damages in an amount to be determined at trial. On October 6, 2009, Ranni was transferred, for consolidation or coordination with other Stanford-related actions (including Troice), to the Northern District of Texas by the U.S. Judicial Panel on Multidistrict Litigation (the ‘JPML’). The defendants have not yet responded to the complaint in Ranni.

•	Canabal, et al. v. Willis of Colorado, Inc., et al., C.A. No. 3:09-CV-01474-D, was filed on August 6, 2009 against Willis Group Holdings plc, Willis of Colorado, Inc. and the same Willis associate named as a defendant in Troice, among others, also in the Northern District of Texas. The complaint was filed individually and on behalf of a putative class of Venezuelan Stanford investors, alleged claims under Texas statutory and common law and sought damages in excess of $1 billion, punitive damages, attorneys’ fees and costs. On December 18, 2009, the parties in Troice and Canabal stipulated to the consolidation of those actions (under the Troice civil action number), and, on December 31, 2009, the plaintiffs in Canabal filed a notice of dismissal, dismissing the action without prejudice.

•	Rupert, et al. v. Winter, et al., Case No. 2009C115137, was filed on September 14, 2009 on behalf of 97 Stanford investors against Willis Group Holdings plc, Willis of Colorado, Inc. and the same Willis associate, among others, in Texas state court (Bexar County). The complaint alleges claims under the Securities Act of 1933, Texas and Colorado statutory law and Texas common law and seeks special, consequential and treble damages of more than $300 million, attorneys’ fees and costs. On October 20, 2009, certain defendants, including Willis of Colorado, Inc., (i) removed Rupert to the U.S. District Court for the Western District of Texas, (ii) notified the JPML of the pendency of this related action and (iii) moved to stay the action pending a determination by the JPML as to whether it should be transferred to the Northern District of Texas for consolidation or coordination with the other Stanford-related actions. On April 1, 2010, the JPML issued a final transfer order for the transfer of Rupert to the Northern District of Texas. On January 24, 2012, the Court remanded Rupert to Texas State Court (Bexar County), but stayed these cases until further order of the court. The defendants have not yet responded to the complaint in Rupert.

•	Casanova, et al. v. Willis of Colorado, Inc., et al., C.A. No. 3:10-CV-01862-O, was filed on September 16, 2010 on behalf of seven Stanford investors against Willis Group Holdings plc, Willis Limited, Willis of Colorado, Inc. and the same Willis associate, among others, also in the Northern District of Texas. The complaint alleges claims under Texas statutory and common law and seeks actual damages in excess of $5 million, punitive damages, attorneys’ fees and costs. The defendants have not yet responded to the complaint in Casanova.

•

Rishmague, et ano. v. Winter, et al., Case No. 2011CI02585, was filed on March 11, 2011 on behalf of two Stanford investors, individually and as representatives of certain trusts, against Willis Group Holdings plc, Willis of Colorado, Inc., Willis of Texas, Inc. and the same Willis associate, among others, in Texas state court (Bexar County). The complaint alleges claims under Texas and Colorado statutory law and Texas common law and seeks special, consequential and treble damages of more than $37 million and attorneys’ fees and costs. On April 11, 2011, certain defendants, including Willis of Colorado, Inc., (i) removed Rishmague to the Western District of Texas, (ii) notified the JPML of the pendency of this related action and (iii) moved to stay the action pending a determination by the JPML as to whether it should be transferred to the Northern District of Texas for consolidation or coordination with the other Stanford-related actions. On August 8, 2011, the JPML issued a final transfer order for the transfer of Rishmague to the Northern District of Texas, where it is currently pending. The defendants have not yet responded to the complaint in Rishmague.

On May 10, 2011, the court presiding over the Stanford-related actions in the Northern District of Texas entered an order providing that it would consider the applicability of SLUSA to the Stanford-related actions based on the decision in a separate Stanford action not involving a Willis entity, Roland v. Green, Civil Action No. 3:10-CV-0224-N. On August 31, 2011, the court issued its decision in Roland, dismissing that action with prejudice under SLUSA

On October 27, 2011, the court in Troice entered an order (i) dismissing with prejudice those claims asserted in the Third Amended Class Action Complaint on a class basis on the grounds set forth in the Roland decision discussed above and (ii) dismissing without prejudice those claims asserted the Third Amended Class Action Complaint on an individual basis. Also on October 27, 2011, the court entered a final judgment in the action.

On October 28, 2011, the plaintiffs in Troice filed a notice of appeal to the U.S. Court of Appeals for the Fifth Circuit. Subsequently, Troice, Roland and a third action captioned Troice, et al. v. Proskauer Rose LLP, Civil Action No. 3:09-CV-01600-N, which also was dismissed on the grounds set forth in the Roland decision discussed above and on appeal to the U.S. Court of Appeals for the Fifth Circuit, were consolidated for purposes of briefing and oral argument. The appeals have been fully briefed and the Fifth Circuit heard oral argument on February 7, 2012. A ruling is expected sometime this year.

Additional actions could be brought in the future by other investors in certificates of deposit issued by Stanford and its affiliates. The Company disputes these allegations and intends to defend itself vigorously against these actions. The outcomes of these actions, however, including any losses or other payments that may occur as a result, cannot be predicted at this time.

Regulatory Investigation

Given the increased interest expressed by US and UK regulators in the effectiveness of compliance controls relating to financial crime in our market sector in particular, we began a voluntary internal review of our policies and controls four years ago. This review includes analysis and advice from external experts on best practices, review of public regulatory decisions, and discussions with government regulators in the US and UK. In addition, during 2010 and 2011 the UK Financial Services Authority (the ‘FSA’) conducted an investigation of Willis Limited’s, our UK brokerage subsidiary, compliance systems and controls between 2005 and 2009. On July 21, 2011, we and the FSA announced a settlement under which the FSA concluded its investigation by assessing a £7 million ($11 million) fine on Willis Limited for lapses in its implementation and documentation of its controls to counter the risks of improper payments being made to non-FSA authorized overseas third parties engaged to help win business, particularly in high risk jurisdictions.

As a result of the FSA settlement, we are conducting a further internal review of all payments made between 2005 and 2009. We also continue to fully cooperate with our US regulators, however we are unable to predict at this time when our discussions with them will be concluded. We do not believe that this further internal review or our discussions with the US regulators will result in any material fines or sanctions, but there can be no assurance that any resolution will not have an adverse impact on our ability to conduct our business in certain jurisdictions. While we believe that our current systems and controls are adequate and in accordance with all applicable laws and regulations, we cannot assure that such systems and controls will prevent any violations of applicable laws and regulations.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 14

-Paragraph 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.25)

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-Name Accounting Standards Codification

-Topic 450

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-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 5: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 460

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-Section 50

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-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

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-Topic 825

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Accumulated Other Comprehensive Loss, Net of Tax

12 Months Ended

Dec. 31, 2011

Accumulated Other Comprehensive Loss, Net of Tax and Equity and Noncontrolling Interests [Abstract]

ACCUMULATED OTHER COMPREHENSIVE LOSS, NET OF TAX


22.	ACCUMULATED OTHER COMPREHENSIVE LOSS, NET OF TAX

The components of comprehensive income (loss) are as follows:


	Years ended December 31,
	2011			2010			2009
	(millions)

Net income	$	220		$	470		$	459
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment (net of tax of $nil in 2011, 2010 and 2009)		(29	)		(8	)		27
Unrealized holding gain (loss) (net of tax of $nil in 2011, 2010 and 2009)		—			2			(1	)
Pension funding adjustment (net of tax of $84 million in 2011, $(12) million in 2010 and $6 million in 2009)		(172	)		51			(33	)
Net (loss) gain on derivative instruments (net of tax of $2 million in 2011, $(3) million in 2010 and $(16) million in 2009)		(3	)		6			43

Other comprehensive (loss) income (net of tax of $86 million in 2011, $(15) million in 2010 and $(10) million in 2009)		(204	)		51			36

Comprehensive income		16			521			495
Noncontrolling interests		(15	)		(13	)		(21	)

Comprehensive income attributable to Willis Group Holdings	$	1		$	508		$	474

The components of accumulated other comprehensive loss, net of tax, are as follows:


	December 31,
	2011			2010			2009
	(millions)

Net foreign currency translation adjustment	$	(80	)	$	(52	)	$	(46	)
Net unrealized holding loss		—			—			(2	)
Pension funding adjustment		(675	)		(503	)		(554	)
Net unrealized gain on derivative instruments		11			14			8

Accumulated other comprehensive loss, attributable to Willis Group Holdings, net of tax	$	(744	)	$	(541	)	$	(594	)

- Definition

The entire disclosure for comprehensive income. Includes, but is not limited to, the following: 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. Components of comprehensive income include: (1) foreign currency translation adjustments; (2) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (3) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (4) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (5) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (6) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (7) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e689-108580

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

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Reference 10: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Glossary Reclassification Adjustments

-URI http://asc.fasb.org/extlink&oid=6522872

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+ Details

Equity and Noncontrolling Interests

12 Months Ended

Dec. 31, 2011

Accumulated Other Comprehensive Loss, Net of Tax and Equity and Noncontrolling Interests [Abstract]

EQUITY AND NONCONTROLLING INTERESTS


23.	EQUITY AND NONCONTROLLING INTEREST

The components of equity and noncontrolling interests are as follows:


	December 31, 2011									December 31, 2010									December 31, 2009
	Willis									Willis									Willis
	Group									Group									Group
	Holdings’			Noncontrolling			Total			Holdings’			Noncontrolling			Total			Holdings’			Noncontrolling			Total
	stockholders			interests			equity			stockholders			interests			equity			stockholders			interests			equity

Balance at January 1,	$	2,577		$	31		$	2,608		$	2,180		$	49		$	2,229		$	1,845		$	50		$	1,895
Comprehensive income:
Net income		204			16			220			455			15			470			438			21			459
Other comprehensive income, net of tax		(203	)		(1	)		(204	)		53			(2	)		51			36			—			36

Comprehensive income		1			15			16			508			13			521			474			21			495
Dividends		(180	)		(15	)		(195	)		(178	)		(26	)		(204	)		(172	)		(17	)		(189	)
Additional paid-in capital		88			—			88			67			—			67			32			—			32
Shares reissued under stock compensation plans		—			—			—			—			—			—			1			—			1
Purchase of subsidiary shares from noncontrolling interests		—			—			—			—			(5	)		(5	)		—			(10	)		(10	)
Additional noncontrolling interests		—			—			—			—			—			—			—			5			5

Balance at December 31,	$	2,486		$	31		$	2,517		$	2,577		$	31		$	2,608		$	2,180		$	49		$	2,229

The effects on equity of changes in Willis Group Holdings, ownership interest in its subsidiaries are as follows:


	Years ended December 31,
	2011		2010			2009
			(millions)

Net income attributable to Willis Group Holdings	$	204	$	455		$	438
Transfers from noncontrolling interest:
Decrease in Willis Group Holdings’ paid-in capital for purchase of noncontrolling interest		—		(19	)		(23	)
Increase in Willis Group Holdings’ paid-in capital for sale of noncontrolling interest		—		—			1

Net transfers from noncontrolling interest		—		(19	)		(22	)

Change from net income attributable to Willis Group Holdings and transfers from noncontrolling interests	$	204	$	436		$	416

- Definition

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

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-Number Topic 4

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-Name Accounting Standards Codification

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-Publisher FASB

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-URI http://asc.fasb.org/extlink&oid=6521494

Reference 14: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

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-Number 129

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Section 08

-Article 4

Reference 21: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Financial Accounting Standard (FAS)

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-Name Staff Accounting Bulletin (SAB)

-Number Topic 4

-Section E

+ Details

Supplemental Disclosures of Cash Flow Information

12 Months Ended

Dec. 31, 2011

Supplemental Disclosures of Cash Flow Information [Abstract]

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION


24.	SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION

Supplemental disclosures regarding cash flow information and non-cash flow investing and financing activities are as follows:


	Years Ended December 31,
	2011			2010			2009
	(millions)

Supplemental disclosures of cash flow information:
Cash payments for income taxes, net	$	15		$	99		$	80
Cash payments for interest		128			163			179

Supplemental disclosures of non-cash flow investing and financing activities:
Write-off of unamortized debt issuance costs	$	(23	)	$	—		$	—
Assets acquired under capital leases		—			23			—
Non cash proceeds from reorganization of investments in associates (Note 6)		—			—			126
Issue of stock on acquisitions of subsidiaries		—			—			1
Issue of loan notes on acquisitions of noncontrolling interests		—			—			13
Issue of stock on acquisitions of noncontrolling interests		—			—			11
Deferred payments on acquisitions of subsidiaries		3			—			1
Deferred payments on acquisitions of noncontrolling interests		8			13			1

Acquisitions:
Fair value of assets acquired	$	6		$	12		$	28
Less:
Liabilities assumed		(3	)		(18	)		(55	)
Cash acquired		(3	)		—			(12	)

Net liabilities assumed, net of cash acquired	$	—		$	(6	)	$	(39	)

- Definition

The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References+ Details

Derivative Financial Instruments and Hedging Activities

12 Months Ended

Dec. 31, 2011

Derivative Financial Instruments and Hedging Activities [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES


25.	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES

Fair value of derivative financial instruments

In addition to the note below, see Note 26 for information about the fair value hierarchy of derivatives.

Primary risks managed by derivative financial instruments

The main risks managed by derivative financial instruments are interest rate risk and foreign currency risk. The Company’s board of directors reviews and approves policies for managing each of these risks as summarized below.

The Company enters into derivative transactions (principally interest rate swaps and forward foreign currency contracts) in order to manage interest rate and foreign currency risks arising from the Company’s operations and its sources of finance. The Company does not hold financial or derivative instruments for trading purposes.

Interest Rate Risk — Investment Income

As a result of the Company’s operating activities, the Company receives cash for premiums and claims which it deposits in short-term investments denominated in US dollars and other currencies. The Company earns interest on these funds, which is included in the Company’s financial statements as investment income. These funds are regulated in terms of access and the instruments in which they may be invested, most of which are short-term in maturity. In order to manage interest rate risk arising from these financial assets, the Company enters into interest rate swaps to receive a fixed rate of interest and pay a variable rate of interest fixed in the various currencies related to the short-term investments. The use of interest rate contracts essentially converts groups of short-term variable rate investments to fixed rates.

The fair value of these contracts is recorded in other assets and other liabilities. For contracts that qualify as cash flow hedges for accounting purposes, the effective portions of changes in fair value are recorded as a component of other comprehensive income.

At December 31, 2011 and 2010, the Company had the following derivative financial instruments that were designated as cash flow hedges of interest rate risk:


		December 31,
						Weighted Average
		Notional		Termination		Interest Rates
		Amount⁽ⁱ⁾		Dates		Receive		Pay
		(millions)				%		%

2011
US dollar	Receive fixed-pay variable	$	740		2012-2015		2.20		0.88
Pounds sterling	Receive fixed-pay variable		241		2012-2015		3.00		1.35
Euro	Receive fixed-pay variable		143		2012-2015		2.31		1.33
2010
US dollar	Receive fixed-pay variable	$	725		2011-2014		2.44		1.33
Pounds sterling	Receive fixed-pay variable		229		2011-2014		3.16		1.88
Euro	Receive fixed-pay variable		155		2011-2014		2.18		1.81


⁽ⁱ⁾		Notional amounts represent US dollar equivalents translated at the spot rate as of December 31.

Interest Rate Risk — Interest Expense

The Company’s operations are financed principally by $2,050 million fixed rate senior notes and $300 million under a 5-year term loan facility.

During the year ended December 31, 2010, the Company entered into a series of interest rate swaps for a total notional amount of $350 million to receive a fixed rate and pay a variable rate on a semi-annual basis, with a maturity date of July 15, 2015. At the year end the weighted average fixed rate was 2.71% and variable rate was 0.44%. The Company has designated and accounts for these instruments as fair value hedges against its $350 million 5.625% senior notes due 2015. The fair values of the interest rate swaps are included within other assets or other liabilities and the fair value of the hedged element of the senior notes is included within long-term debt.

The Company also has access to $520 million under two revolving credit facilities; as of December 31, 2011 $nil was drawn on these facilities. The 5-year term loan facility bears interest at LIBOR plus 1.50%. Drawings under the revolving $500 million credit facility bear interest at LIBOR plus 1.50%. These margins apply while the Company’s debt rating remains BBB-/Baa3. Should the Company’s debt rating change, then the margin will change in accordance with the credit facilities agreements.

At December 31, 2011 and 2010, the Company’s interest rate swaps were all designated as hedging instruments.

Foreign Currency Risk

The Company’s primary foreign exchange risks arise:


•	from changes in the exchange rate between US dollars and pounds sterling as its London market operations earn the majority of their revenues in US dollars and incur expenses predominantly in pounds sterling, and may also hold a significant net sterling asset or liability position on the balance sheet. In addition, the London market operations earn significant revenues in Euros and Japanese yen; and

•	from the translation into US dollars of the net income and net assets of its foreign subsidiaries, excluding the London market operations which are US dollar denominated.

The foreign exchange risks in its London market operations are hedged as follows:


•	to the extent that forecast pound sterling expenses exceed pound sterling revenues, the Company limits its exposure to this exchange rate risk by the use of forward contracts matched to specific, clearly identified cash outflows arising in the ordinary course of business; and

•	to the extent the UK operations earn significant revenues in Euros and Japanese yen, the Company limits its exposure to changes in the exchange rate between the US dollar and these currencies by the use of forward contracts matched to a percentage of forecast cash inflows in specific currencies and periods.

The Company does not hedge net income earned within foreign subsidiaries outside of the UK.

The fair value of foreign currency contracts is recorded in other assets and other liabilities. For contracts that qualify as accounting hedges, changes in fair value resulting from movements in the spot exchange rate are recorded as a component of other comprehensive income whilst changes resulting from a movement in the time value are recorded in interest expense. For contracts that do not qualify for hedge accounting, the total change in fair value is recorded in interest expense. Amounts held in comprehensive income are reclassified into earnings when the hedged exposure affects earnings.

At December 31, 2011 and 2010, the Company’s foreign currency contracts were all designated as hedging instruments except for those relating to short-term cash flows in its London market operations.

The table below summarizes by major currency the contractual amounts of the Company’s forward contracts to exchange foreign currencies for pounds sterling in the case of US dollars and US dollars for Euro and Japanese yen. Foreign currency notional amounts are reported in US dollars translated at contracted exchange rates.


	December 31,
	Sell		Sell
	2011⁽ⁱ⁾		2010
	(millions)

US dollar	$	235	$	315
Euro		129		157
Japanese yen		50		64


⁽ⁱ⁾		Forward exchange contracts range in maturity from 2012 to 2014.

In addition to forward exchange contracts we undertake short-term foreign exchange swaps for liquidity purposes, these are not designated as hedges and do not qualify for hedge accounting. Both the fair value and the year to date gain/loss at December 31, 2011 and 2010 were immaterial.

Derivative financial instruments

The table below presents the fair value of the Company’s derivative financial instruments and their balance sheet classification at December 31:


		Fair value
	Balance sheet	December 31,		December 31,
Derivative financial instruments designated as hedging instruments:	classification	2011		2010
		(millions)

Assets:
Interest rate swaps (cash flow hedges)	Other assets	$	15	$	17
Interest rate swaps (fair value hedges)	Other assets		26		14
Forward exchange contracts	Other assets		11		16

Total derivatives designated as hedging instruments		$	52	$	47

Liabilities:
Interest rate swaps (cash flow hedges)	Other liabilities	$	—	$	2
Forward exchange contracts	Other liabilities		11		10

Total derivatives designated as hedging instruments		$	11	$	12

Cash Flow Hedges

The table below presents the effects of derivative financial instruments in cash flow hedging relationships on the consolidated statements of operations and the consolidated statements of equity for years ended December 31, 2011 and 2010:


								Amount of
								gain (loss)
				Amount of				recognized
				gain (loss)				in income
	Amount of			reclassified				on derivative
	gain (loss)			from				(ineffective
	recognized			accumulated			Location of gain (loss)	hedges and
	in OCI⁽ⁱ⁾		Location of gain (loss)	OCI⁽ⁱ⁾ into			recognized in income	ineffective
	on derivative		reclassified from	income			on derivative (ineffective	element of
Derivatives in cash flow	(effective		accumulated OCI⁽ⁱ⁾ into	(effective			hedges and ineffective	effective
hedging relationships	element)		income (effective element)	element)			element of effective hedges)	hedges)
	(millions)			(millions)				(millions)

Year ended December 31, 2011
Interest rate swaps	$	13	Investment income	$	(14	)	Other operating expenses	$	—
Forward exchange contracts		3	Other operating expenses		(7	)	Interest expense		(2	)

Total	$	16		$	(21	)		$	(2	)

Year ended December 31, 2010
Interest rate swaps	$	15	Investment income	$	(26	)	Other operating expenses	$	—
Forward exchange contracts		—	Other operating expenses		20		Interest expense		—

Total	$	15		$	(6	)		$	—

Year ended December 31, 2009
Interest rate swaps	$	16	Investment income	$	(27	)	Other operating expenses	$	(1	)
Forward exchange contracts		25	Other operating expenses		45		Interest expense		—

Total	$	41		$	18			$	(1	)

Amounts above shown gross of tax.


⁽ⁱ⁾		OCI means other comprehensive income.

For interest rate swaps all components of each derivative’s gain or loss were included in the assessment of hedge effectiveness. For foreign exchange contracts only the changes in fair value resulting from movements in the spot exchange rate are included in this assessment. In instances where the timing of expected cash flows can be matched exactly to the maturity of the foreign exchange contract, then changes in fair value attributable to movement in the forward points are also included.

At December 31, 2011 the Company estimates there will be $2 million of net derivative gains reclassified from accumulated comprehensive income into earnings within the next twelve months.

Fair Value Hedges

The table below presents the effects of derivative financial instruments in fair value hedging relationships on the consolidated statements of operations for the year ended December 31, 2011 and 2010. The Company did not have any derivative financial instruments in fair value hedging relationships during 2009.


				Loss			Ineffectiveness
		Gain		recognized			recognized in
	Hedged item in fair value	recognized		for hedged			interest
Derivatives in fair value hedging relationships	hedging relationship	for derivative		item			expense
		(millions)

Year ended December 31, 2011
Interest rate swaps	5.625% senior notes due 2015	$	7	$	(8	)	$	1

Year ended December 31, 2010
Interest rate swaps	5.625% senior notes due 2015	$	14	$	(12	)	$	(2	)

All components of each derivative’s gain or loss were included in the assessment of hedge effectiveness.

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

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+ Details

Fair Value Measurements

12 Months Ended

Dec. 31, 2011

Fair Value Measurements [Abstract]

FAIR VALUE MEASUREMENTS


26.	FAIR VALUE MEASUREMENTS

The Company’s principal financial instruments, other than derivatives, comprise the fixed rate senior notes, the 5-year term loan, a revolving credit facility, fiduciary assets and liabilities, and cash deposits.

The following table presents, for each of the fair-value hierarchy levels, the Company’s assets and liabilities that are measured at fair value on a recurring basis:


	December 31, 2011
	Quoted
	prices in
	active
	markets		Significant		Significant
	for		other		other
	identical		observable		unobservable
	assets		inputs		inputs
	Level 1		Level 2		Level 3		Total
			(millions)

Assets at fair value:
Cash and cash equivalents	$	436	$	—	$	—	$	436
Fiduciary funds (included within Fiduciary assets)		1,688		—		—		1,688
Derivative financial instruments		—		52		—		52

Total assets	$	2,124	$	52	$	—	$	2,176

Liabilities at fair value:
Derivative financial instruments	$	—	$	11	$	—	$	11
Changes in fair value of hedged debt⁽ⁱ⁾		—		20		—		20

Total liabilities	$	—	$	31	$	—	$	31


⁽ⁱ⁾		Changes in the fair value of the underlying hedged debt instrument since inception of the hedging relationship are included in long-term debt.


	December 31, 2010
	Quoted
	prices in
	active
	markets		Significant		Significant
	for		other		other
	identical		observable		unobservable
	assets		inputs		inputs
	Level 1		Level 2		Level 3		Total
			(millions)

Assets at fair value:
Cash and cash equivalents	$	316	$	—	$	—	$	316
Fiduciary funds (included within Fiduciary assets)		1,764		—		—		1,764
Derivative financial instruments		—		47		—		47

Total assets	$	2,080	$	47	$	—	$	2,127

Liabilities at fair value:
Derivative financial instruments	$	—	$	12	$	—	$	12
Changes in fair value of hedged debt⁽ⁱ⁾		—		12		—		12

Total liabilities	$	—	$	24	$	—	$	24


⁽ⁱ⁾		Changes in the fair value of the underlying hedged debt instrument since inception of the hedging relationship are included in long-term debt.

The estimated fair value of the Company’s financial instruments held or issued to finance the Company’s operations is summarized below. Certain estimates and judgments were required to develop the fair value amounts. The fair value amounts shown below are not necessarily indicative of the amounts that the Company would realize upon disposition nor do they indicate the Company’s intent or ability to dispose of the financial instrument.


	December 31,
	2011				2010
	Carrying		Fair		Carrying		Fair
	amount		value		amount		value
			(millions)

Assets:
Cash and cash equivalents	$	436	$	436	$	316	$	316
Fiduciary funds (included within Fiduciary assets)		1,688		1,688		1,764		1,764
Derivative financial instruments		52		52		47		47
Liabilities:
Short-term debt	$	15	$	15	$	110	$	110
Long-term debt		2,354		2,499		2,157		2,450
Derivative financial instruments		11		11		12		12

The following methods and assumptions were used by the Company in estimating its fair value disclosure for financial instruments:

Cash and cash equivalents—The estimated fair value of these financial instruments approximates their carrying values due to their short maturities.

Fiduciary funds—Fair values are based on quoted market values.

Long-term debt excluding the fair value hedge—Fair values are based on quoted market values.

Derivative financial instruments—Market values have been used to determine the fair value of interest rate swaps and forward foreign exchange contracts based on estimated amounts the Company would receive or have to pay to terminate the agreements, taking into account the current interest rate environment or current foreign currency forward rates.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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+ Details

Segment Information

12 Months Ended

Dec. 31, 2011

Segment Information [Abstract]

SEGMENT INFORMATION


27.	SEGMENT INFORMATION

During the periods presented, the Company operated through three segments: Global, North America and International. Global provides specialist brokerage and consulting services to clients worldwide for specific industrial and commercial activities and is organized by specialism. North America and International predominantly comprise our retail operations which provide services to small, medium and large corporations, accessing Global’s specialist expertise when required.


	(i)	costs of the holding company;

	(ii)	foreign exchange loss from the devaluation of the Venezuelan currency;

	(iii)	foreign exchange hedging activities, foreign exchange movements on the UK pension plan asset and foreign exchange gains and losses from currency purchases and sales;


	(iv)	amortization of intangible assets;

	(v)	gains and losses on the disposal of operations;

	(vi)	significant legal and regulatory settlements which are managed centrally; and

	(vii)	costs associated with the 2011 Operational Review.

The accounting policies of the operating segments are consistent with those described in Note 2 — Basis of Presentation and Significant Accounting Policies. There are no inter-segment revenues, with segments operating on a revenue-sharing basis equivalent to that used when sharing business with other third-party brokers.

Selected information regarding the Company’s operating segments is as follows:


													Interest in
									Depreciation				earnings of
	Commissions		Investment		Other		Total		and		Operating		associates,
	and fees		income		income		revenues		amortization		income		net of tax
							(millions)

Year ended December 31, 2011
Global	$	1,073	$	9	$	—	$	1,082	$	23	$	352	$	—
North America		1,314		7		2		1,323		28		271		—
International		1,027		15		—		1,042		18		221		12

Total Retail		2,341		22		2		2,365		46		492		12

Total Operating Segments		3,414		31		2		3,447		69		844		12
Corporate and Other⁽ⁱ⁾		—		—		—		—		73		(278)		—

Total Consolidated	$	3,414	$	31	$	2	$	3,447	$	142	$	566	$	12

Year ended December 31, 2010
Global	$	987	$	9	$	—	$	996	$	18	$	320	$	—
North America		1,369		15		1		1,385		23		320		—
International		937		14		—		951		22		226		23

Total Retail		2,306		29		1		2,336		45		546		23

Total Operating Segments		3,293		38		1		3,332		63		866		23
Corporate and Other⁽ⁱ⁾		—		—		—		—		82		(113)		—

Total Consolidated	$	3,293	$	38	$	1	$	3,332	$	145	$	753	$	23

Year ended December 31, 2009
Global	$	921	$	17	$	—	$	938	$	15	$	311	$	—
North America		1,381		15		3		1,399		23		328		—
International		898		18		—		916		26		216		33

Total Retail		2,279		33		3		2,315		49		544		33

Total Operating Segments		3,200		50		3		3,253		64		855		33
Corporate and Other⁽ⁱ⁾		—		—		—		—		100		(165)		—

Total Consolidated	$	3,200	$	50	$	3	$	3,253	$	164	$	690	$	33


⁽ⁱ⁾		See the following table for an analysis of the ‘Corporate and other’ line.


	Years ended December 31,
	2011			2010			2009
	(millions)

Amortization of intangible assets	$	(68	)	$	(82	)	$	(100	)
Foreign exchange hedging		5			(16	)		(42	)
Foreign exchange gain (loss) on the UK pension plan asset		—			3			(6	)
HRH integration costs		—			—			(18	)
Net gain (loss) on disposal of operations		4			(2	)		13
2011 Operational Review		(180	)		—			—
FSA regulatory settlement		(11	)		—			—
Venezuela currency devaluation		—			(12	)		—
Write-off of uncollectible accounts receivable balance in North America		(22	)		—			—
Redomicile of parent company costs		—			—			(6	)
Other^(a)		(6	)		(4	)		(6	)

Total Corporate and Other	$	(278	)	$	(113	)	$	(165	)


^(a)		Other includes $12 million (2010: $7 million, 2009: $nil) from the release of funds and reserves related to potential legal liabilities.

The following table reconciles total consolidated operating income, as disclosed in the operating segment tables above, to consolidated income from continuing operations before income taxes and interest in earnings of associates.


	Years ended December 31,
	2011			2010			2009
	(millions)

Total consolidated operating income	$	566		$	753		$	690
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs		(171	)		—			—
Interest expense		(156	)		(166	)		(174	)

Income from continuing operations before income taxes and interest in earnings of associates	$	239		$	587		$	516

The Company does not currently provide asset information by reportable segment as it does not routinely evaluate the total asset position by segment, and as such, no segmental analysis of assets has been disclosed. Segments are evaluated on organic commissions and fees growth and operating margin.

Operating segment revenue by product is as follows:


	Years ended December 31,
	2011		2010		2009		2011		2010		2009		2011		2010		2009		2011		2010		2009
	Global						North America						International						Total
	(millions)

Commissions and fees:
Retail insurance services	$	—	$	—	$	—	$	1,314	$	1,369	$	1,381	$	1,027	$	937	$	898	$	2,341	$	2,306	$	2,279
Specialty insurance services		1,073		987		921		—		—		—		—		—		—		1,073		987		921

Total commissions and fees		1,073		987		921		1,314		1,369		1,381		1,027		937		898		3,414		3,293		3,200
Investment income		9		9		17		7		15		15		15		14		18		31		38		50
Other income		—		—		—		2		1		3		—		—		—		2		1		3

Total Revenues	$	1,082	$	996	$	938	$	1,323	$	1,385	$	1,399	$	1,042	$	951	$	916	$	3,447	$	3,332	$	3,253

None of the Company’s customers represented more than 10 percent of the Company’s consolidated commissions and fees for the years ended December 31, 2011, 2010 and 2009.

Information regarding the Company’s geographic locations is as follows:


	Years Ended December 31,
	2011		2010		2009
	(millions)

Commissions and fees⁽ⁱ⁾
UK	$	963	$	902	$	859
US		1,461		1,503		1,508
Other⁽ⁱⁱ⁾		990		888		833

Total	$	3,414	$	3,293	$	3,200


	December 31,
	2011		2010
	(millions)

Fixed assets
UK	$	171	$	163
US		194		178
Other⁽ⁱⁱ⁾		41		40

Total	$	406	$	381


⁽ⁱ⁾		Commissions and fees are attributed to countries based upon the location of the subsidiary generating the revenue.


⁽ⁱⁱ⁾		Other than in the United Kingdom and the United States, the Company does not conduct business in any country in which its commissions and fees and/or fixed assets exceed 10 percent of consolidated commissions and fees and/or fixed assets, respectively.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

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-Section 50

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

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-Publisher FASB

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+ Details

Subsidiary Undertakings

12 Months Ended

Dec. 31, 2011

Subsidiary Undertakings [Abstract]

SUBSIDIARY UNDERTAKINGS


28.	SUBSIDIARY UNDERTAKINGS

The Company has investments in the following subsidiary undertakings which principally affect the net income or net assets of the Group.

A full list of the Group’s subsidiary undertakings is included within the Company’s annual return.


	Country of
Subsidiary name	registration	Class of share	Percentage ownership

Holding companies
TAI Limited	England and Wales	Ordinary shares		100	%
Trinity Acquisition plc	England and Wales	Ordinary shares		100	%
Willis Faber Limited	England and Wales	Ordinary shares		100	%
Willis Group Limited	England and Wales	Ordinary shares		100	%
Willis Investment UK Holdings Limited	England and Wales	Ordinary shares		100	%
Willis Netherlands Holdings B.V	Netherlands	Ordinary shares		100	%
Willis Europe B.V	England and Wales	Ordinary shares		100	%
Insurance broking companies
Willis HRH, Inc.	USA	Common shares		100	%
Willis Limited	England and Wales	Ordinary shares		100	%
Willis North America, Inc.	USA	Common shares		100	%
Willis Re, Inc.	USA	Common shares		100	%

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries

12 Months Ended

Dec. 31, 2011

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries [Abstract]

FINANCIAL INFORMATION FOR PARENT GUARANTOR, OTHER GUARANTOR SUBSIDIARIES AND NON-GUARANTOR SUBSIDIARIES


29.	FINANCIAL INFORMATION FOR PARENT GUARANTOR, OTHER GUARANTOR SUBSIDIARIES AND NON-GUARANTOR SUBSIDIARIES

Willis North America Inc. (‘Willis North America’) has $350 million senior notes outstanding that were issued on July 1, 2005. Willis North America issued a further $600 million of senior notes on March 28, 2007 and another $300 million on September 29, 2009.

Until December 22, 2010, all direct obligations under the senior notes were jointly and severally, irrevocably and fully and unconditionally guaranteed by Willis Group Holdings, Willis Netherlands Holdings B.V., Willis Investment UK Holdings Limited, TA I Limited, TA II Limited, Trinity Acquisition plc, TA III Limited, TA IV Limited and Willis Group Limited. On that date and in connection with an internal group reorganization, TA II Limited, TA III Limited and TA IV Limited transferred their obligations as guarantors to the other guarantor companies. TA II Limited, TA III Limited and TA IV Limited entered voluntary liquidation on December 31, 2010. The assets of these companies were distributed to the other guarantor companies described below (‘Other Guarantors’), either directly or indirectly, as a final distribution paid prior to their entering voluntary liquidation. As such, these transactions did not have a material impact on the guarantees of the senior notes and did not require the consent of the noteholders under the applicable indentures.

The debt securities that were issued by Willis North America and guaranteed by the entities described above, and for which the disclosures set forth below relate and are required under applicable SEC rules, were issued under a ‘shelf’ registration statement on Form S-3, including our current June 2009 registration statement (the ‘Willis Shelf’).

Presented below is condensed consolidating financial information for:


	(i)	Willis Group Holdings, which is a guarantor, on a parent company only basis;

	(ii)	the Other Guarantors, which are all 100 percent directly or indirectly owned subsidiaries of the parent and are all direct or indirect parents of the issuer;

	(iii)	the Issuer, Willis North America;

	(iv)	Other, which are the non-guarantor subsidiaries, on a combined basis;

	(v)	Consolidating adjustments; and

	(vi)	the Consolidated Company.

The equity method has been used for investments in subsidiaries in the condensed consolidating balance sheets for the year ended December 31, 2011 of Willis Group Holdings, the Other Guarantors and the Issuer. Investments in subsidiaries in the condensed consolidating balance sheet for Other, represents the cost of investment in subsidiaries recorded in the parent companies of the non-guarantor subsidiaries.

The entities included in the Other Guarantors column for the year ended December 31, 2011 are Willis Netherlands Holdings B.V., Willis Investment UK Holdings Limited, Trinity Acquisition plc, TA I Limited and Willis Group Limited.

Condensed Consolidating Statement of Operations


	Year ended December 31, 2011
	Willis
	Group			The Other			The						Consolidating
	Holdings			Guarantors			Issuer			Other			adjustments			Consolidated
							(millions)


REVENUES
Commissions and fees	$	—		$	—		$	—		$	3,414		$	—		$	3,414
Investment income		—			11			2			29			(11	)		31
Other income		—			—			—			24			(22	)		2

Total revenues		—			11			2			3,467			(33	)		3,447

EXPENSES
Salaries and benefits		(3	)		—			(69	)		(2,015	)		—			(2,087	)
Other operating expenses		(17	)		32			(98	)		(571	)		(2	)		(656	)
Depreciation expense		—			—			(14	)		(60	)		—			(74	)
Amortization of intangible assets		—			—			—			(74	)		6			(68	)
Net gain on disposal of operations		—			—			—			7			(3	)		4

Total expenses		(20	)		32			(181	)		(2,713	)		1			(2,881	)

OPERATING (LOSS) INCOME		(20	)		43			(179	)		754			(32	)		566
Investment income from Group undertakings		35			406			341			(157	)		(625	)		—
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs		—			(171	)		—			—			—			(171	)
Interest expense		(34	)		(251	)		(159	)		(332	)		620			(156	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		(19	)		27			3			265			(37	)		239
Income taxes		—			56			27			(117	)		2			(32	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		(19	)		83			30			148			(35	)		207
Interest in earnings of associates, net of tax		—			—			—			4			8			12

(LOSS) INCOME FROM CONTINUING OPERATIONS		(19	)		83			30			152			(27	)		219
Discontinued operations, net of tax		—			—			—			1			—			1

NET (LOSS) INCOME		(19	)		83			30			153			(27	)		220
Less: Net income attributable to noncontrolling interests		—			—			—			(16	)		—			(16	)
EQUITY ACCOUNT FOR SUBSIDIARIES		223			91			(66	)		—			(248	)		—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	204		$	174		$	(36	)	$	137		$	(275	)	$	204

Condensed Consolidating Statement of Operations


	Year Ended December 31, 2010
	Willis
	Group			The Other			The						Consolidating
	Holdings			Guarantors			Issuer			Other			adjustments			Consolidated
							(millions)

REVENUES
Commissions and fees	$	—		$	—		$	—		$	3,293		$	—		$	3,293
Investment income		—			10			2			36			(10	)		38
Other income		—			—			—			1			—			1

Total revenues		—			10			2			3,330			(10	)		3,332

EXPENSES
Salaries and benefits		—			—			(65	)		(1,818	)		15			(1,868	)
Other operating expenses		335			(10	)		(45	)		(825	)		(19	)		(564	)
Depreciation expense		—			—			(9	)		(54	)		—			(63	)
Amortization of intangible assets		—			—			—			(82	)		—			(82	)
Net (loss) gain on disposal of operations		(347	)		—			—			350			(5	)		(2	)

Total expenses		(12	)		(10	)		(119	)		(2,429	)		(9	)		(2,579	)

OPERATING (LOSS) INCOME		(12	)		—			(117	)		901			(19	)		753
Investment income from Group undertakings		—			1,683			356			952			(2,991	)		—
Interest expense		—			(423	)		(157	)		(374	)		788			(166	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		(12	)		1,260			82			1,479			(2,222	)		587
Income taxes		—			16			29			(186	)		1			(140	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		(12	)		1,276			111			1,293			(2,221	)		447
Interest in earnings of associates, net of tax		—			—			—			16			7			23

(LOSS) INCOME FROM CONTINUING OPERATIONS		(12	)		1,276			111			1,309			(2,214	)		470

NET (LOSS) INCOME		(12	)		1,276			111			1,309			(2,214	)		470
Less: Net income attributable to noncontrolling interests		—			—			—			(15	)		—			(15	)
EQUITY ACCOUNT FOR SUBSIDIARIES		467			(823	)		(76	)		—			432			—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	455		$	453		$	35		$	1,294		$	(1,782	)	$	455

Condensed Consolidating Statement of Operations


	Year ended December 31, 2009
	Willis
	Group		The Other			The						Consolidating
	Holdings		Guarantors			Issuer			Other			adjustments			Consolidated
						(millions)

REVENUES
Commissions and fees	$	—	$	—		$	—		$	3,200		$	—		$	3,200
Investment income		—		—			4			46			—			50
Other income		—		—			—			3			—			3

Total revenues		—		—			4			3,249			—			3,253

EXPENSES
Salaries and benefits		—		—			(28	)		(1,803	)		9			(1,822	)
Other operating expenses		—		57			(34	)		(617	)		4			(590	)
Depreciation expense		—		—			(8	)		(56	)		—			(64	)
Amortization of intangible assets		—		—			—			(100	)		—			(100	)
Net gain on disposal of operations		—		—			—			13			—			13

Total expenses		—		57			(70	)		(2,563	)		13			(2,563	)

OPERATING INCOME (LOSS)		—		57			(66	)		686			13			690
Investment income from Group undertakings		—		917			492			504			(1,913	)		—
Interest expense		—		(415	)		(173	)		(346	)		760			(174	)

INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		—		559			253			844			(1,140	)		516
Income taxes		—		(5	)		20			(110	)		1			(94	)

INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		—		554			273			734			(1,139	)		422
Interest in earnings of associates, net of tax		—		—			—			33			—			33

INCOME FROM CONTINUING OPERATIONS		—		554			273			767			(1,139	)		455
Discontinued operations, net of tax		—		—			—			4			—			4

NET INCOME		—		554			273			771			(1,139	)		459
Less: Net income attributable to noncontrolling interests		—		—			—			(4	)		(17	)		(21	)
EQUITY ACCOUNT FOR SUBSIDIARIES		438		(156	)		(30	)		—			(252	)		—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	438	$	398		$	243		$	767		$	(1,408	)	$	438

Condensed Consolidating Balance Sheet


	As at December 31, 2011
	Willis
	Group			The Other			The					Consolidating
	Holdings			Guarantors			Issuer		Other			adjustments			Consolidated
							(millions)

ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	—		$	—		$	163	$	273		$	—		$	436
Accounts receivable, net		2			—			3		877			28			910
Fiduciary assets		—			—			—		9,941			(603	)		9,338
Deferred tax assets		—			1			—		43			—			44
Other current assets		1			52			21		271			(86	)		259

Total current assets		3			53			187		11,405			(661	)		10,987

Investments in subsidiaries		(1,023	)		3,778			1,482		3,848			(8,085	)		—
Amounts owed by (to) Group undertakings		4,354			(4,716	)		476		(114	)		—			—
NON-CURRENT ASSETS
Fixed assets, net		—			4			59		345			(2	)		406
Goodwill		—			—			—		1,704			1,591			3,295
Other intangible assets, net		—			—			—		435			(15	)		420
Investments in associates		—			—			—		(45	)		215			170
Deferred tax assets		—			—			—		22			—			22
Pension benefits asset		—			—			—		145			—			145
Other non-current assets		5			170			43		192			(127	)		283

Total non-current assets		5			174			102		2,798			1,662			4,741

TOTAL ASSETS	$	3,339		$	(711	)	$	2,247	$	17,937		$	(7,084	)	$	15,728


LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES
Fiduciary liabilities	$	—		$	—		$	—	$	9,941		$	(603	)	$	9,338
Deferred revenue and accrued expenses		2			—			—		318			—			320
Income taxes payable		—			40			—		30			(55	)		15
Short-term debt and current portion of long-term debt		—			11			—		4			—			15
Deferred tax liabilities		—			—			1		25			—			26
Other current liabilities		56			11			57		185			(27	)		282

Total current liabilities		58			62			58		10,503			(685	)		9,996

NON-CURRENT LIABILITIES
Long-term debt		795			289			1,270		—			—			2,354
Liabilities for pension benefits		—			—			—		270			—			270
Deferred tax liabilities		—			5			35		(9	)		1			32
Provisions for liabilities		—			—			—		198			(2	)		196
Other non-current liabilities		—			9			9		345			—			363

Total non-current liabilities		795			303			1,314		804			(1	)		3,215

TOTAL LIABILITIES	$	853		$	365		$	1,372	$	11,307		$	(686	)	$	13,211

EQUITY
Total Willis Group Holdings stockholders’ equity		2,486			(1,076	)		875		6,599			(6,398	)		2,486
Noncontrolling interests		—			—			—		31			—			31

Total equity		2,486			(1,076	)		875		6,630			(6,398	)		2,517

TOTAL LIABILITIES AND EQUITY	$	3,339		$	(711	)	$	2,247	$	17,937		$	(7,084	)	$	15,728

Condensed Consolidating Balance Sheet


	As at December 31, 2010
	Willis
	Group			The Other			The					Consolidating
	Holdings			Guarantors			Issuer		Other			adjustments			Consolidated
							(millions)

ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	—		$	—		$	76	$	240		$	—		$	316
Accounts receivable, net		2			—			—		809			28			839
Fiduciary assets		—			—			—		10,167			(598	)		9,569
Deferred tax assets		—			—			1		35			—			36
Other current assets		—			23			57		293			(33	)		340

Total current assets		2			23			134		11,544			(603	)		11,100

Investments in subsidiaries		(1,039	)		3,814			1,455		3,855			(8,085	)		—
Amounts owed by (to) Group undertakings		3,659			(4,590	)		1,002		(71	)		—			—
NON-CURRENT ASSETS
Fixed assets, net		—			—			52		330			(1	)		381
Goodwill		—			—			—		1,696			1,598			3,294
Other intangible assets, net		—			—			—		492			—			492
Investments in associates		—			—			—		(51	)		212			161
Deferred tax assets		—			—			—		7			—			7
Pension benefits asset		—			—			—		182			—			182
Other non-current assets		—			166			41		149			(123	)		233

Total non-current assets		—			166			93		2,805			1,686			4,750

TOTAL ASSETS	$	2,622		$	(587	)	$	2,684	$	18,133		$	(7,002	)	$	15,850


LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES
Fiduciary liabilities	$	—		$	—		$	—	$	10,167		$	(598	)	$	9,569
Deferred revenue and accrued expenses		1			—			—		297			—			298
Income taxes payable		—			—			—		69			(12	)		57
Short-term debt and current portion of long-term debt		—			—			110		—			—			110
Deferred tax liabilities		—			3			1		5			—			9
Other current liabilities		44			15			38		189			(20	)		266

Total current liabilities		45			18			149		10,727			(630	)		10,309

NON-CURRENT LIABILITIES
Long-term debt		—			500			1,653		4			—			2,157
Liabilities for pension benefits		—			—			—		167			—			167
Deferred tax liabilities		—			3			26		54			—			83
Provisions for liabilities		—			—			—		183			(4	)		179
Other non-current liabilities		—			10			16		321			—			347

Total non-current liabilities		—			513			1,695		729			(4	)		2,933

TOTAL LIABILITIES	$	45		$	531		$	1,844	$	11,456		$	(634	)	$	13,242

EQUITY
Total Willis Group Holdings stockholders’ equity		2,577			(1,118	)		840		6,646			(6,368	)		2,577
Noncontrolling interests		—			—			—		31			—			31

Total equity		2,577			(1,118	)		840		6,677			(6,368	)		2,608

TOTAL LIABILITIES AND EQUITY	$	2,622		$	(587	)	$	2,684	$	18,133		$	(7,002	)	$	15,850

Condensed Consolidating Statement of Cash Flows


	Year ended December 31, 2011
	Willis
	Group			The Other			The						Consolidating
	Holdings			Guarantors			Issuer			Other			adjustments			Consolidated
							(millions)

NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	(41	)	$	184		$	88		$	1,269		$	(1,061	)	$	439

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—			—			—			13			—			13
Purchases of fixed assets		—			(4	)		(21	)		(86	)		—			(111	)
Acquisitions of subsidiaries, net of cash acquired		—			—			—			(10	)		—			(10	)
Acquisitions of investments in associates		—			—			—			(2	)		—			(2	)
Investment in Trident V Parallel Fund, LP		—			—			—			(5	)		—			(5	)
Proceeds from sale of discontinued operations, net of cash disposed		—			—			—			14			—			14

Net cash used in investing activities		—			(4	)		(21	)		(76	)		—			(101	)

CASH FLOWS FROM FINANCING ACTIVITIES
Repayments on revolving credit facility		—			—			(90	)		—			—			(90	)
Senior notes issued		794			—			—			—			—			794
Debt issuance costs		(7	)		(5	)		—			—			—			(12	)
Proceeds from issue term loan		—			300			—			—			—			300
Repayments of debt		—			(500	)		(411	)		—			—			(911	)
Make-whole on repurchase and redemption of senior notes		—			(158	)		—			—			—			(158	)
Proceeds from issue of shares		60			—			—			—			—			60
Excess tax benefits from share-based payment arrangement		—			—			—			5			—			5
Amounts owed (to) by Group undertakings		(626	)		187			521			(82	)		—			—
Dividends paid		(180	)		—			—			(1,061	)		1,061			(180	)
Acquisition of noncontrolling interests		—			(4	)		—			(5	)		—			(9	)
Dividends paid to noncontrolling interests		—			—			—			(13	)		—			(13	)

Net cash provided by (used in) financing activities		41			(180	)		20			(1,156	)		1,061			(214	)

INCREASE IN CASH AND CASH EQUIVALENTS		—			—			87			37			—			124
Effect of exchange rate changes on cash and cash equivalents		—			—			—			(4	)		—			(4	)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—			—			76			240			—			316

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—		$	—		$	163		$	273		$	—		$	436

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2010
	Willis
	Group			The Other			The						Consolidating
	Holdings			Guarantors			Issuer			Other			adjustments			Consolidated
							(millions)

NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	(9	)	$	1,170		$	83		$	1,572		$	(2,327	)	$	489

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—			—			—			10			—			10
Additions to fixed assets		—			—			(7	)		(76	)		—			(83	)
Acquisitions of subsidiaries, net of cash acquired		—			—			—			(21	)		—			(21	)
Acquisitions of investments in associates		—			—			—			(1	)		—			(1	)
Investment in Trident V Parallel Fund, LP		—			—			—			(1	)		—			(1	)
Proceeds from sale of continuing operations, net of cash disposed		—			—			—			2			—			2

Net cash used in investing activities		—			—			(7	)		(87	)		—			(94	)

CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from draw down of revolving credit facility		—			—			90			—			—			90
Repayments of debt		—			—			(200	)		(9	)		—			(209	)
Proceeds from issue of shares		36			—			—			—			—			36
Excess tax benefits from share-based payment arrangement		—			—			—			2			—			2
Amounts owed by (to) Group undertakings		106			(317	)		6			205			—			—
Dividends paid		(133	)		(849	)		—			(1,521	)		2,327			(176	)
Acquisition of noncontrolling interests		—			(4	)		—			(6	)		—			(10	)
Dividends paid to noncontrolling interests		—			—			—			(26	)		—			(26	)

Net cash provided by (used in) financing activities		9			(1,170	)		(104	)		(1,355	)		2,327			(293	)

(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS		—			—			(28	)		130			—			102
Effect of exchange rate changes on cash and cash equivalents		—			—			—			(7	)		—			(7	)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—			—			104			117			—			221

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—		$	—		$	76		$	240		$	—		$	316

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2009
	Willis
	Group		The Other			The						Consolidating
	Holdings		Guarantors			Issuer			Other			adjustments			Consolidated
						(millions)

NET CASH PROVIDED BY OPERATING ACTIVITIES	$	—	$	867		$	390		$	27		$	(865	)	$	419

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—		—			—			20			—			20
Additions to fixed assets		—		—			(17	)		(79	)		—			(96	)
Acquisitions of investments in associates		—		—			—			(42	)		—			(42	)
Proceeds from reorganization of investments in associates		—		—			—			155			—			155
Proceeds from sale of continuing operations, net of cash disposed		—		—			—			4			—			4
Proceeds from sale of discontinued operations, net of cash disposed		—		—			—			40			—			40
Proceeds on sale of short-term investments		—		—			—			21			—			21

Net cash (used in) provided by investing activities		—		—			(17	)		119			—			102

CASH FLOWS FROM FINANCING ACTIVITIES
Repayments of debt		—		—			(1,090	)		1			—			(1,089	)
Senior notes issued		—		500			300			—			—			800
Debt issuance costs		—		(18	)		(4	)		—			—			(22	)
Proceeds from issue of shares		—		—			—			18			—			18
Amounts owed by and to Group undertakings		—		(646	)		525			121			—			—
Excess tax benefits from share-based payment arrangements		—		—			—			1			—			1
Dividends paid		—		(703	)		—			(336	)		865			(174	)
Acquisition of noncontrolling interests		—		—			—			(33	)		—			(33	)
Dividends paid to noncontrolling interests		—		—			—			(17	)		—			(17	)

Net cash used in financing activities		—		(867	)		(269	)		(245	)		865			(516	)

INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		—		—			104			(99	)		—			5
Effect of exchange rate changes on cash and cash equivalents		—		—			—			11			—			11
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—		—			—			205			—			205

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—	$	—		$	104		$	117		$	—		$	221

- Definition

The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.

+ References+ Details

Financial Information for Parent Issuer, Guarantor Subsidiaries and Non-Guarantor Subsidiaries

12 Months Ended

Dec. 31, 2011

Financial Information for Parent Issuer Guarantor Subsidiaries and Non-Guarantor Subsidiaries Disclosure [Abstract]

FINANCIAL INFORMATION FOR PARENT ISSUER, GUARANTOR SUBSIDIARIES AND NON-GUARANTOR SUBSIDIARIES


30.	FINANCIAL INFORMATION FOR PARENT ISSUER, GUARANTOR SUBSIDIARIES AND NON-GUARANTOR SUBSIDIARIES

The Company may offer debt securities, preferred stock, ordinary stock and other securities pursuant to the Willis Shelf. On March 17, 2011, the Company issued senior notes totaling $800 million under its existing registration statement. These debt securities are issued by Willis Group Holdings (‘Holdings Debt Securities’) and are guaranteed by certain of the Company’s subsidiaries. Therefore, the Company is providing the condensed consolidating financial information below. The following 100 percent directly or indirectly owned subsidiaries fully and unconditionally guarantee the Holdings Debt Securities on a joint and several basis: Willis Netherlands Holdings B.V., Willis Investment UK Holdings Limited, TA I Limited, Trinity Acquisition plc, Willis Group Limited and Willis North America (the ‘Guarantors’).

The guarantor structure described above differs from the guarantor structure associated with the senior notes issued by Willis North America (the ‘Willis North America Debt Securities’) (and for which condensed consolidating financial information is presented in Note 29) in that Willis Group Holdings is the Parent Issuer and Willis North America is a subsidiary guarantor.

Presented below is condensed consolidating financial information for:


	(i)	Willis Group Holdings, which is the Parent Issuer;

	(ii)	the Guarantors, which are all 100 percent directly or indirectly owned subsidiaries of the parent;

	(iii)	Other, which are the non-guarantor subsidiaries, on a combined basis;

	(iv)	Consolidating adjustments; and

	(v)	the Consolidated Company.

The equity method has been used for investments in subsidiaries in the condensed consolidating balance sheets for the year ended December 31, 2011 of Willis Group Holdings and the Guarantors. Investments in subsidiaries in the condensed consolidating balance sheet for Other, represents the cost of investment in subsidiaries recorded in the parent companies of the non-guarantor subsidiaries.

The entities included in the Guarantors column for the year ended December 31, 2011 are Willis Netherlands Holdings B.V., Willis Investment UK Holdings Limited, TA I Limited, Trinity Acquisition plc, Willis Group Limited and Willis North America.

Condensed Consolidating Statement of Operations


	Year ended December 31, 2011
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

REVENUES
Commissions and fees	$	—		$	—		$	3,414		$	—		$	3,414
Investment income		—			13			29			(11	)		31
Other income		—			—			24			(22	)		2

Total revenues		—			13			3,467			(33	)		3,447

EXPENSES
Salaries and benefits		(3	)		(69	)		(2,015	)		—			(2,087	)
Other operating expenses		(17	)		(66	)		(571	)		(2	)		(656	)
Depreciation expense		—			(14	)		(60	)		—			(74	)
Amortization of intangible assets		—			—			(74	)		6			(68	)
Net gain on disposal of operations		—			—			7			(3	)		4

Total expenses		(20	)		(149	)		(2,713	)		1			(2,881	)

OPERATING (LOSS) INCOME		(20	)		(136	)		754			(32	)		566
Investment income from Group undertakings		35			747			(157	)		(625	)		—
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs		—			(171	)		—			—			(171	)
Interest expense		(34	)		(410	)		(332	)		620			(156	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		(19	)		30			265			(37	)		239
Income taxes		—			83			(117	)		2			(32	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		(19	)		113			148			(35	)		207
Interest in earnings of associates, net of tax		—			—			4			8			12

(LOSS) INCOME FROM CONTINUING OPERATIONS		(19	)		113			152			(27	)		219
Discontinued operations, net of tax		—			—			1			—			1

NET (LOSS) INCOME		(19	)		113			153			(27	)		220
Less: Net income attributable to noncontrolling interests		—			—			(16	)		—			(16	)
EQUITY ACCOUNT FOR SUBSIDIARIES		223			61			—			(284	)		—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	204		$	174		$	137		$	(311	)	$	204

Condensed Consolidating Statement of Operations


	Year Ended December 31, 2010
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

REVENUES
Commissions and fees	$	—		$	—		$	3,293		$	—		$	3,293
Investment income		—			12			36			(10	)		38
Other income		—			—			1			—			1

Total revenues		—			12			3,330			(10	)		3,332

EXPENSES
Salaries and benefits		—			(65	)		(1,818	)		15			(1,868	)
Other operating expenses		335			(55	)		(825	)		(19	)		(564	)
Depreciation expense		—			(9	)		(54	)		—			(63	)
Amortization of intangible assets		—			—			(82	)		—			(82	)
Net (loss) gain on disposal of operations		(347	)		—			350			(5	)		(2	)

Total expenses		(12	)		(129	)		(2,429	)		(9	)		(2,579	)

OPERATING (LOSS) INCOME		(12	)		(117	)		901			(19	)		753
Investment income from Group undertakings		—			2,039			952			(2,991	)		—
Interest expense		—			(580	)		(374	)		788			(166	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		(12	)		1,342			1,479			(2,222	)		587
Income taxes		—			45			(186	)		1			(140	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		(12	)		1,387			1,293			(2,221	)		447
Interest in earnings of associates, net of tax		—			—			16			7			23

(LOSS) INCOME FROM CONTINUING OPERATIONS		(12	)		1,387			1,309			(2,214	)		470

NET (LOSS) INCOME		(12	)		1,387			1,309			(2,214	)		470
Less: Net income attributable to noncontrolling interests		—			—			(15	)		—			(15	)
EQUITY ACCOUNT FOR SUBSIDIARIES		467			(934	)		—			467			—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	455		$	453		$	1,294		$	(1,747	)	$	455

Condensed Consolidating Statement of Operations


	Year Ended December 31, 2009
	Willis
	Group
	Holdings —
	the Parent		The						Consolidating
	Issuer		Guarantors			Other			adjustments			Consolidated
	(millions)

REVENUES
Commissions and fees	$	—	$	—		$	3,200		$	—		$	3,200
Investment income		—		4			46			—			50
Other income		—		—			3			—			3

Total revenues		—		4			3,249			—			3,253

EXPENSES
Salaries and benefits		—		(28	)		(1,803	)		9			(1,822	)
Other operating expenses		—		23			(617	)		4			(590	)
Depreciation expense		—		(8	)		(56	)		—			(64	)
Amortization of intangible assets		—		—			(100	)		—			(100	)
Net gain on disposal of operations		—		—			13			—			13

Total expenses		—		(13	)		(2,563	)		13			(2,563	)

OPERATING (LOSS) INCOME		—		(9	)		686			13			690
Investment income from Group undertakings		—		1,409			504			(1,913	)		—
Interest expense		—		(588	)		(346	)		760			(174	)

INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		—		812			844			(1,140	)		516
Income taxes		—		15			(110	)		1			(94	)

INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		—		827			734			(1,139	)		422
Interest in earnings of associates, net of tax		—		—			33			—			33

INCOME FROM CONTINUING OPERATIONS		—		827			767			(1,139	)		455
Discontinued operations, net of tax		—		—			4			—			4

NET INCOME		—		827			771			(1,139	)		459
Less: Net income attributable to noncontrolling interests		—		—			(4	)		(17	)		(21	)
EQUITY ACCOUNT FOR SUBSIDIARIES		438		(429	)		—			(9	)		—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	438	$	398		$	767		$	(1,165	)	$	438

Condensed Consolidating Balance Sheet


	As at December 31, 2011
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	—		$	163		$	273		$	—		$	436
Accounts receivable, net		2			3			877			28			910
Fiduciary assets		—			—			9,941			(603	)		9,338
Deferred tax assets		—			1			43			—			44
Other current assets		1			73			271			(86	)		259

Total current assets		3			240			11,405			(661	)		10,987

Investments in subsidiaries		(1,023	)		4,385			3,848			(7,210	)		—
Amounts owed by (to) Group undertakings		4,354			(4,240	)		(114	)		—			—
NON-CURRENT ASSETS
Fixed assets, net		—			63			345			(2	)		406
Goodwill		—			—			1,704			1,591			3,295
Other intangible assets, net		—			—			435			(15	)		420
Investments in associates		—			—			(45	)		215			170
Deferred tax assets		—			—			22			—			22
Pension benefits asset		—			—			145			—			145
Other non-current assets		5			213			192			(127	)		283

Total non-current assets		5			276			2,798			1,662			4,741


TOTAL ASSETS	$	3,339		$	661		$	17,937		$	(6,209	)	$	15,728


LIABILITIES AND STOCKHOLDERS’ EQUITY

CURRENT LIABILITIES
Fiduciary liabilities	$	—		$	—		$	9,941		$	(603	)	$	9,338
Deferred revenue and accrued expenses		2			—			318			—			320
Income taxes payable		—			40			30			(55	)		15
Short-term debt and current portion on long-term debt		—			11			4			—			15
Deferred tax liabilities		—			1			25			—			26
Other current liabilities		56			68			185			(27	)		282

Total current liabilities		58			120			10,503			(685	)		9,996


NON-CURRENT LIABILITIES
Long-term debt		795			1,559			—			—			2,354
Liabilities for pension benefits		—			—			270			—			270
Deferred tax liabilities		—			40			(9	)		1			32
Provisions for liabilities		—			—			198			(2	)		196
Other non-current liabilities		—			18			345			—			363

Total non-current liabilities		795			1,617			804			(1	)		3,215

TOTAL LIABILITIES	$	853		$	1,737		$	11,307		$	(686	)	$	13,211

EQUITY
Total Willis Group Holdings stockholders’ equity		2,486			(1,076	)		6,599			(5,523	)		2,486
Noncontrolling interests		—			—			31			—			31

Total equity		2,486			(1,076	)		6,630			(5,523	)		2,517

TOTAL LIABILITIES AND EQUITY	$	3,339		$	661		$	17,937		$	(6,209	)	$	15,728

Condensed Consolidating Balance Sheet


	As at December 31, 2010
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	—		$	76		$	240		$	—		$	316
Accounts receivable, net		2			—			809			28			839
Fiduciary assets		—			—			10,167			(598	)		9,569
Deferred tax assets		—			1			35			—			36
Other current assets		—			80			293			(33	)		340

Total current assets		2			157			11,544			(603	)		11,100

Investments in subsidiaries		(1,039	)		4,429			3,855			(7,245	)		—
Amounts owed by (to) Group undertakings		3,659			(3,588	)		(71	)		—			—
NON-CURRENT ASSETS
Fixed assets, net		—			52			330			(1	)		381
Goodwill		—			—			1,696			1,598			3,294
Other intangible assets, net		—			—			492			—			492
Investments in associates		—			—			(51	)		212			161
Deferred tax assets		—			—			7			—			7
Pension benefits asset		—			—			182			—			182
Other non-current assets		—			207			149			(123	)		233

Total non-current assets		—			259			2,805			1,686			4,750

TOTAL ASSETS	$	2,622		$	1,257		$	18,133		$	(6,162	)	$	15,850


LIABILITIES AND STOCKHOLDERS’ EQUITY

CURRENT LIABILITIES
Fiduciary liabilities	$	—		$	—		$	10,167		$	(598	)	$	9,569
Deferred revenue and accrued expenses		1			—			297			—			298
Income taxes payable		—			—			69			(12	)		57
Short-term debt and current portion of long-term debt		—			110			—			—			110
Deferred tax liabilities		—			4			5			—			9
Other current liabilities		44			53			189			(20	)		266

Total current liabilities		45			167			10,727			(630	)		10,309


NON-CURRENT LIABILITIES
Long-term debt		—			2,153			4			—			2,157
Liabilities for pension benefits		—			—			167			—			167
Deferred tax liabilities		—			29			54			—			83
Provisions for liabilities		—			—			183			(4	)		179
Other non-current liabilities		—			26			321			—			347

Total non-current liabilities		—			2,208			729			(4	)		2,933

TOTAL LIABILITIES	$	45		$	2,375		$	11,456		$	(634	)	$	13,242

EQUITY
Total Willis Group Holdings stockholders’ equity		2,577			(1,118	)		6,646			(5,528	)		2,577
Noncontrolling interests		—			—			31			—			31

Total equity		2,577			(1,118	)		6,677			(5,528	)		2,608

TOTAL LIABILITIES AND EQUITY	$	2,622		$	1,257		$	18,133		$	(6,162	)	$	15,850

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2011
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	(41	)	$	272		$	1,269		$	(1,061	)	$	439

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—			—			13			—			13
Purchases of fixed assets		—			(25	)		(86	)		—			(111	)
Acquisitions of subsidiaries, net of cash acquired		—			—			(10	)		—			(10	)
Acquisitions of investments in associates		—			—			(2	)		—			(2	)
Investment in Trident V Parallel Fund, LP		—			—			(5	)		—			(5	)
Proceeds from sale of discontinued operations, net of cash disposed		—			—			14			—			14

Net cash used in investing activities		—			(25	)		(76	)		—			(101	)

CASH FLOWS FROM FINANCING ACTIVITIES
Repayments on revolving credit facility		—			(90	)		—			—			(90	)
Senior notes issued		794			—			—			—			794
Debt issuance costs		(7	)		(5	)		—			—			(12	)
Proceeds from issue term loan		—			300			—			—			300
Repayments of debt		—			(911	)		—			—			(911	)
Make-whole on repurchase and redemption of senior notes		—			(158	)		—			—			(158	)
Proceeds from issue of shares		60			—			—			—			60
Excess tax benefits from share-based payment arrangement		—			—			5			—			5
Amounts owed (to) by Group undertakings		(626	)		708			(82	)		—			—
Dividends paid		(180	)		—			(1,061	)		1,061			(180	)
Acquisition of noncontrolling interests		—			(4	)		(5	)		—			(9	)
Dividends paid to noncontrolling interests		—			—			(13	)		—			(13	)

Net cash provided by (used in) financing activities		41			(160	)		(1,156	)		1,061			(214	)

INCREASE IN CASH AND CASH EQUIVALENTS		—			87			37			—			124
Effect of exchange rate changes on cash and cash equivalents		—			—			(4	)		—			(4	)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—			76			240			—			316

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—		$	163		$	273		$	—		$	436

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2010
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	(9	)	$	1,253		$	1,572		$	(2,327	)	$	489

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—			—			10			—			10
Additions to fixed assets		—			(7	)		(76	)		—			(83	)
Acquisitions of subsidiaries, net of cash acquired		—			—			(21	)		—			(21	)
Acquisitions of investments in associates		—			—			(1	)		—			(1	)
Investment in Trident V Parallel Fund, LP		—			—			(1	)		—			(1	)
Proceeds from sale of continuing operations, net of cash disposed		—			—			2			—			2

Net cash used in investing activities		—			(7	)		(87	)		—			(94	)

CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from draw down of revolving credit facility		—			90			—			—			90
Repayments of debt		—			(200	)		(9	)		—			(209	)
Proceeds from issue of shares		36			—			—			—			36
Excess tax benefits from share-based payment arrangement		—			—			2			—			2
Amounts owed by (to) Group undertakings		106			(311	)		205			—			—
Dividends paid		(133	)		(849	)		(1,521	)		2,327			(176	)
Acquisition of noncontrolling interests		—			(4	)		(6	)		—			(10	)
Dividends paid to noncontrolling interests		—			—			(26	)		—			(26	)

Net cash provided by (used in) financing activities		9			(1,274	)		(1,355	)		2,327			(293	)

(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS		—			(28	)		130			—			102
Effect of exchange rate changes on cash and cash equivalents		—			—			(7	)		—			(7	)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—			104			117			—			221

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—		$	76		$	240		$	—		$	316

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2009
	Willis
	Group
	Holdings —
	the Parent		The						Consolidating
	Issuer		Guarantors			Other			adjustments			Consolidated
	(millions)

NET CASH PROVIDED BY OPERATING ACTIVITIES	$	—	$	1,257		$	27		$	(865	)	$	419

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—		—			20			—			20
Additions to fixed assets		—		(17	)		(79	)		—			(96	)
Acquisitions of investments in associates		—		—			(42	)		—			(42	)
Proceeds from reorganization of investments in associates		—		—			155			—			155
Proceeds from sale of continuing operations, net of cash disposed		—		—			4			—			4
Proceeds from sale of discontinued operations, net of cash disposed		—		—			40			—			40
Proceeds on sale of short-term investments		—		—			21			—			21

Net cash (used in) provided by investing activities		—		(17	)		119			—			102

CASH FLOWS FROM FINANCING ACTIVITIES
Repayments of debt		—		(1,090	)		1			—			(1,089	)
Senior notes issued		—		800			—			—			800
Debt issuance costs		—		(22	)		—			—			(22	)
Proceeds from issue of shares		—		—			18			—			18
Amounts owed by (to) Group undertakings		—		(121	)		121			—			—
Excess tax benefits from share-based payment arrangements		—		—			1			—			1
Dividends paid		—		(703	)		(336	)		865			(174	)
Acquisition of noncontrolling interests		—		—			(33	)		—			(33	)
Dividends paid to noncontrolling interests		—		—			(17	)		—			(17	)

Net cash used in financing activities		—		(1,136	)		(245	)		865			(516	)

INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		—		104			(99	)		—			5
Effect of exchange rate changes on cash and cash equivalents		—		—			11			—			11
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—		—			205			—			205

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—	$	104		$	117		$	—		$	221

Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Data [Unaudited] [Abstract]

QUARTERLY FINANCIAL DATA (UNAUDITED)


31.	QUARTERLY FINANCIAL DATA (UNAUDITED)

Quarterly financial data for 2011 and 2010 were as follows:


	Three Months Ended
	March 31,			June 30,			September 30,			December 31,
	(millions, except per share data)

2011
Total revenues	$	1,007		$	861		$	760		$	819
Total expenses		(768	)		(705	)		(670	)		(738	)
Net income		42			89			60			29
Net income attributable to Willis Group Holdings		34			85			60			25
Earnings per share — continuing operations
— Basic	$	0.20		$	0.49		$	0.35		$	0.14
— Diluted	$	0.20		$	0.48		$	0.34		$	0.14
Earnings per share — discontinued operations
— Basic	$	—		$	—		$	—		$	—
— Diluted	$	—		$	—		$	—		$	—

2010
Total revenues	$	971		$	797		$	731		$	833
Total expenses		(669	)		(629	)		(625	)		(656	)
Net income		211			91			65			103
Net income attributable to Willis Group Holdings		204			89			64			98
Earnings per share — continuing operations
— Basic	$	1.21		$	0.52		$	0.38		$	0.57
— Diluted	$	1.21		$	0.51		$	0.37		$	0.57
Earnings per share — discontinued operations
— Basic	$	—		$	—		$	—		$	—
— Diluted	$	—		$	—		$	—		$	—

- Definition

The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished.

+ References+ Details

Basis of Presentation and Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2011

Basis of Presentation and Significant Accounting Policies [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Fair Value Measurement and Disclosure

This guidance is effective for interim and annual periods beginning after December 15, 2011 and is applied prospectively.

Other Comprehensive Income

This guidance is effective for interim and annual periods beginning after December 15, 2011 and is applied retrospectively.

Goodwill impairment testing

This guidance is effective for interim and annual goodwill impairment tests performed for fiscal years beginning after December 15, 2011.

Principles of Consolidation

Principles of Consolidation

Foreign Currency Translation

Foreign Currency Translation

Use of Estimates

Use of Estimates

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash and cash equivalents primarily consist of time deposits with original maturities of three months or less.

Fiduciary Assets and Fiduciary Liabilities

Fiduciary Assets and Fiduciary Liabilities

Fiduciary Receivables

Fiduciary receivables represent uncollected premiums from insureds and uncollected claims or refunds from insurers.

Fiduciary Funds

Fiduciary Liabilities

Accounts Receivable

Accounts Receivable

Fixed Assets

Fixed Assets

Recoverability of Fixed Assets

Recoverability of Fixed Assets

Operating Leases

Operating Leases

Rentals payable on operating leases are charged straight line to expenses over the lease term as the rentals become payable.

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

Acquired intangible assets are amortized over the following periods:


		Expected
	Amortization basis	life (years)

Acquired intangible assets	Straight line		10
Acquired HRH customer relationships	In line with underlying cashflows		20
Acquired HRH non-compete agreements	Straight line		2
Acquired HRH trade names	Straight line		4

Amortizable intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable.

Investments in Associates

Investments in Associates

All other equity investments where the Company does not have the ability to exercise significant influence are accounted for by the cost method. Such investments are not publicly traded.

Derivative Financial Instruments

Derivative Financial Instruments

Income Taxes

Income Taxes

The Company recognizes interest and penalties relating to unrecognized tax benefits within income taxes.

Provisions for Liabilities

Provisions for Liabilities

Pensions

Pensions

Defined benefit plans

In accordance with US GAAP the Company records on the balance sheet the funded status of its pension plans based on the projected benefit obligation.

Defined contribution plans

Share-Based Compensation

Share-Based Compensation

The Company accounts for share-based compensation as follows:


•	the cost resulting from all equity awards is recognized in the financial statements at fair value estimated at the grant date;

•	the fair value is recognized (generally as compensation cost) over the requisite service period for all awards that vest; and

•	compensation cost is not recognized for awards that do not vest because service or performance conditions are not satisfied.

Revenue Recognition

Revenue Recognition

Revenue includes insurance commissions, fees for services rendered, certain commissions receivable from insurance carriers, investment income and other income.

Investment income is recognized as earned.

Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Basis of Presentation and Significant Accounting Policies [Abstract]

Acquired intangible assets are amortized over the following periods:


		Expected
	Amortization basis	life (years)

Acquired intangible assets	Straight line		10
Acquired HRH customer relationships	In line with underlying cashflows		20
Acquired HRH non-compete agreements	Straight line		2
Acquired HRH trade names	Straight line		4

Employees (Tables)

12 Months Ended

Dec. 31, 2011

Employees [Abstract]

Average number of persons, including Executive Directors, employed by the Company


	Years ended December 31,
	2011		2010		2009

Global		4,042		3,931		3,815

North America		6,479		6,710		7,116
International		6,634		6,460		6,202

Total Retail		13,113		13,170		13,318

Total average number of employees for the year		17,155		17,101		17,133

Salaries and benefit expenses


	Years ended December 31,
	2011		2010		2009
	(millions)

Salaries and other compensation awards including amortization of cash retention awards of $185 million, $119 million and $88 million (see below)	$	1,776	$	1,618	$	1,570
Share-based compensation		41		47		39
Severance costs		89		15		24
Social security costs		130		119		117
Retirement benefits — defined benefit plan expense		11		35		42
Retirement benefits — defined contribution plan expense		40		34		30

Total salaries and benefits expense	$	2,087	$	1,868	$	1,822

Severance liability


	December 31,
	2011
	(millions)

Balance at January 1, 2011	$	—
Severance costs accrued		89
Cash payments		(64	)
Foreign exchange		(1	)

Balance at December 31, 2011	$	24

Cash retention awards


	Years ended December 31,
	2011		2010		2009
	(millions)

Cash retention awards made	$	210	$	196	$	148
Amortization of cash retention awards included in salaries and benefits		185		119		88

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Share-Based Compensation [Abstract]

Option valuation assumptions


	Years ended December 31,
	2011			2010			2009

Expected volatility		31.4	%		30.4	%		32.4	%
Expected dividends		2.5	%		3.4	%		3.9	%
Expected life (years)		6			5			5
Risk-free interest rate		2.2	%		2.2	%		3.0	%

Summary of option activity under share based compensation plans


						Weighted
				Weighted		Average
				Average		Remaining		Aggregate
				Exercise		Contractual		Intrinsic
(Options in thousands)	Options			Price⁽ⁱ⁾		Term		Value
								(millions)

Time-based stock options
Balance, beginning of year		11,449		$	32.73
Granted		140		$	30.30
Exercised		(1,769	)	$	29.44
Forfeited		(521	)	$	32.46
Expired		(125	)	$	32.17

Balance, end of year		9,174		$	33.35		3 years	$	50

Options vested or expected to vest at December 31, 2011		8,896		$	33.51		3 years	$	49
Options exercisable at December 31, 2011		7,702		$	34.07		3 years	$	38

Performance-based stock options
Balance, beginning of year		9,449		$	32.14
Granted		1,523		$	41.40
Exercised		(96	)	$	29.61
Forfeited		(3,593	)	$	36.23

Balance, end of year		7,283		$	32.09		6 years	$	49

Options vested or expected to vest at December 31, 2011		6,227		$	32.30		6 years	$	44
Options exercisable at December 31, 2011		1,879		$	32.80		5 years	$	11


⁽ⁱ⁾		Certain options are exercisable in pounds sterling and are converted to dollars using the exchange rate at December 31, 2011.

Summary of restricted stock unit activity under share based compensation plans


				Weighted
				Average
				Grant Date
(Units awarded in thousands)	Shares			Fair Value

Nonvested shares (restricted stock units)
Balance, beginning of year		1,798		$	28.82
Granted		346		$	40.77
Vested		(918	)	$	29.31
Forfeited		(34	)	$	27.18

Balance, end of year		1,192		$	31.96

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Income from continuing operations before income taxes and interest in earnings of associates by location of taxing jurisdiction


	Years ended December 31,
	2011			2010		2009
	(millions)

Ireland	$	(39	)	$	3	$	(2	)
US		(25	)		84		2
UK		(58	)		183		204
Other jurisdictions		361			317		312

Income from continuing operations before income taxes and interest in earnings of associates	$	239		$	587	$	516

Provision for income taxes by location of the taxing jurisdiction


	Years ended December 31,
	2011			2010			2009
	(millions)

Current income taxes:
Irish corporation tax	$	—		$	1		$	—
US federal tax		—			(30	)		40
US state and local taxes		1			—			17
UK corporation tax		(33	)		54			17
Other jurisdictions		42			41			52

Total current taxes		10			66			126

Non-current taxes:
US federal tax		5			(3	)		(9	)
US state and local taxes		—			(3	)		(2	)
UK corporation tax		(4	)		—			—
Other jurisdictions		4			3			—

Total non-current taxes		5			(3	)		(11	)

Deferred taxes:
US federal tax		(6	)		57			(24	)
US state and local taxes		1			9			(3	)
UK corporation tax		20			3			1
Other jurisdictions		2			8			5

Total deferred taxes		17			77			(21	)

Total income taxes	$	32		$	140		$	94

Reconciliation between US federal income taxes at the statutory rate and the Company's provision for income taxes on continuing operations


	Years ended December 31,
	2011			2010			2009
	(millions, except percentages)

Income from continuing operations before income taxes and interest in earnings of associates	$	239		$	587		$	516

US federal statutory income tax rate		35	%		35	%		35	%

Income tax expense at US federal tax rate		84			205			181
Adjustments to derive effective rate:
Non-deductible expenditure		15			7			4
Movement in provision for non-current taxes		3			(3	)		(11	)
Release of provision for unremitted earnings		—			—			(27	)
Impact of change in tax rate on deferred tax balances		(3	)		(4	)		—
Adjustment in respect of prior periods		(13	)		(22	)		(6	)
Non-deductible Venezuelan foreign exchange loss		—			4			—
Non-taxable profit on disposal of Gras Savoye		—			1			(3	)
Effect of foreign exchange and other differences		1			11			2
Changes in valuation allowances applied to deferred tax assets		5			—			—
Net tax effect of intra-group items		(31	)		(26	)		—
Tax differentials of foreign earnings:
UK earnings		6			(13	)		(13	)
Other jurisdictions and US state taxes		(35	)		(20	)		(33	)

Provision for income taxes	$	32		$	140		$	94

Significant components of deferred income tax assets and liabilities and their balance sheet classifications


	December 31,
	2011			2010
	(millions)

Deferred tax assets:
Accrued expenses not currently deductible	$	116		$	34
US state net operating losses		56			47
US federal net operating losses		23			—
UK net operating losses		1			2
Other net operating losses		7			3
UK capital losses		45			49
Accrued retirement benefits		105			62
Deferred compensation		45			46
Stock options		34			51

Gross deferred tax assets		432			294
Less: valuation allowance		(102	)		(87	)

Net deferred tax assets	$	330		$	207

Deferred tax liabilities:
Cost of intangible assets, net of related amortization	$	149		$	155
Cost of tangible assets, net of related amortization		42			25
Prepaid retirement benefits		36			50
Accrued revenue not currently taxable		26			7
Cash retention award		63			10
Tax-leasing transactions		2			3
Financial derivative transactions		4			6
Other		—			—

Deferred tax liabilities		322			256

Net deferred tax asset (liability)	$	8		$	(49	)


	December 31,
	2011			2010
	(millions)

Balance sheet classifications:
Current:
Deferred tax assets	$	44		$	36
Deferred tax liabilities		(26	)		(9	)

Net current deferred tax assets		18			27

Non-current:
Deferred tax assets		22			7
Deferred tax liabilities		(32	)		(83	)

Net non-current deferred tax liabilities		(10	)		(76	)

Net deferred tax asset (liability)	$	8		$	(49	)

Summary valuation allowances


			Additions/
			(releases)								Balance
	Balance at		charged to					Foreign			at
	beginning		costs and		Deductions/Other			exchange			end of
Description	of year		expenses		movements			differences			year
	(millions)

Year ended December 31, 2011
Deferred tax valuation allowance		87		—		15			—			102

Year ended December 31, 2010
Deferred tax valuation allowance		92		—		(4	)		(1	)		87

Year ended December 31, 2009
Deferred tax valuation allowance		85		—		2			5			92

Reconciliation of the beginning and ending amounts of unrecognized tax benefits


	2011		2010			2009
	(millions)

Balance at January 1	$	13	$	17		$	33
Reductions due to a lapse of the applicable statute of limitation		—		(7	)		(11	)
Adjustment to assessment of acquired HRH balances		—		—			(8	)
Other movements		3		3			3

Balance at December 31	$	16	$	13		$	17

- Definition

Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions.

+ References+ Details

- Definition

Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance.

+ References+ Details

Discontinued Operation (Tables)

12 Months Ended

Dec. 31, 2011

Net Gain (Loss) on Disposal of Operations and Discontinued operations [Abstract]

Amount of revenue and pre tax income reported in discontinued operation


	Years ended December 31,
	2011			2010		2009
	(millions)

Revenues	$	8		$	7	$	19

Income before income taxes		(1	)		—		6
Income taxes		—			—		(2	)

Income from discontinued operations	$	(1	)	$	—	$	4
Gain on disposal of discontinued operations, net of tax		2			—		—

Discontinued operations, net of tax	$	1		$	—	$	4

Net assets and liabilities of discontinued operation


	At
	December 31,
	2011
	(millions)

Cash and cash equivalents	$	1
Fiduciary assets		17
Goodwill		3
Other intangible assets, net		6
Other current assets		2

Total assets		29

Fiduciary liabilities		(17	)
Other current liabilities		(1	)

Total liabilities		(18	)

Net assets of discontinued operations	$	11

- Definition

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

+ References+ Details

Fixed Assets, Net (Tables)

12 Months Ended

Dec. 31, 2011

Fixed Assets, Net [Abstract]

Analysis of fixed asset activity


	Land and			Leasehold			Furniture and
	buildings⁽ⁱ⁾			improvements			equipment			Total
	(millions)

Cost: at January 1, 2010	$	51		$	184		$	473		$	708
Additions		24			13			69			106
Disposals		—			(4	)		(45	)		(49	)
Foreign exchange		(2	)		(1	)		(9	)		(12	)

Cost: at December 31, 2010		73			192			488			753
Additions		—			24			87			111
Disposals		—			(13	)		(52	)		(65	)
Foreign exchange		—			7			(14	)		(7	)

Cost: at December 31, 2011	$	73		$	210		$	509		$	792


Depreciation: at January 1, 2010	$	(24	)	$	(46	)	$	(286	)	$	(356	)
Depreciation expense provided⁽ⁱⁱ⁾		(2	)		(12	)		(49	)		(63	)
Disposals		—			2			39			41
Foreign exchange		1			—			5			6

Depreciation: at December 31, 2010		(25	)		(56	)		(291	)		(372	)
Depreciation expense provided⁽ⁱⁱ⁾		(3	)		(15	)		(58	)		(76	)
Disposals		—			13			45			58
Foreign exchange		—			(3	)		7			4

Depreciation: at December 31, 2011	$	(28	)	$	(61	)	$	(297	)	$	(386	)

Net book value:
At December 31, 2010	$	48		$	136		$	197		$	381

At December 31, 2011	$	45		$	149		$	212		$	406


⁽ⁱ⁾		Included within land and buildings are assets held under capital leases. At December 31, 2011, cost and accumulated depreciation were $23 million and $2 million respectively (2010: $23 million and $1 million, respectively; 2009 $nil and $nil, respectively). Depreciation in the year ended December 31, 2011 was $1 million (2010: $1 million; 2009: $nil).

⁽ⁱⁱ⁾		The depreciation charge for the year ended December 31, 2011 includes an element that is disclosed in salaries and benefits, separate to the depreciation charge line, of $2 million (2010: $nil).

Goodwill (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill and Other Intangible Assets, Net [Abstract]

Changes in the carrying amount of goodwill by operating segment


				North
	Global			America			International			Total
	(millions)

Balance at January 1, 2010	$	1,065		$	1,780		$	432		$	3,277
Purchase price allocation adjustments		—			6			—			6
Other movements⁽ⁱ⁾		—			(3	)		—			(3	)
Foreign exchange		(2	)		—			16			14

Balance at December 31, 2010	$	1,063		$	1,783		$	448		$	3,294
Purchase price allocation adjustments		—			—			2			2
Goodwill acquired during the period		—			—			10			10
Goodwill disposed of during the year		—			(3	)		—			(3	)
Other movements ^{(i) (ii)}		60			2			(61	)		1
Foreign exchange		(1	)		—			(8	)		(9	)

Balance at December 31, 2011	$	1,122		$	1,782		$	391		$	3,295


⁽ⁱ⁾		North America — $(1) million (2010: $3 million) tax benefit arising on the exercise of fully vested HRH stock options which were issued as part of the acquisition of HRH in 2008.

⁽ⁱⁱ⁾		Effective January 1, 2011, the Company changed its internal reporting structure: Global Markets International, previously reported within the International segment, is now reported in the Global segment; and Mexico Retail, which was previously reported within the International segment, is now reported in the North America segment. As a result of these changes, goodwill of $60 million has been reallocated from the International segment into the Global segment for Global Markets International, and $1 million has been reallocated from the International segment into the North America segment for Mexico Retail. Goodwill has been reallocated between segments using the relative fair value allocation approach.

- Definition

Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

+ References+ Details

Investments in Associates (Tables)

12 Months Ended

Dec. 31, 2011

Investments in Associates [Abstract]

The Company's approximate interest in the outstanding stock of the more significant associates

December 31,

Country

2011

2010

Al-Futtaim Willis Co. L.L.C.

Dubai

49%

GS & Cie Groupe

France

30%

31%

Condensed financial information for associates


	2011			2010			2009
	(millions)

Condensed statements of operations data⁽ⁱ⁾:
Total revenues	$	527		$	510		$	534
Income before income taxes		5			61			96
Net income		(2	)		43			64
Condensed balance sheets data⁽ⁱ⁾:
Total assets		1,882			2,043			2,204
Total liabilities		(1,736	)		(1,825	)		(1,767	)
Stockholders’ equity		(146	)		(218	)		(437	)


⁽ⁱ⁾		Disclosure is based on the Company’s best estimate of the results of its associates and is subject to change upon receipt of their financial statements for 2011.

- Definition

Tabular disclosure of equity method investments in common stock. The disclosure may include: (a) the name of each investee or group of investments for which combined disclosure is appropriate, (2) the percentage ownership of common stock, (3) the difference, if any, between the carrying amount of an investment and the value of the underlying equity in the net assets and the accounting treatment of difference, if any, and (4) the aggregate value of each identified investment based on its quoted market price, if available.

+ References+ Details

Other Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill and Other Intangible Assets, Net [Abstract]

Summary of major classes of amortizable intangible assets


	December 31, 2011							December 31, 2010
	Gross carrying		Accumulated					Gross carrying		Accumulated
	amount		amortization			Net carrying amount		amount		amortization			Net carrying amount
	(millions)

Customer and Marketing Related:
Client Relationships	$	686	$	(269	)	$	417	$	695	$	(207	)	$	488
Client Lists		8		(7	)		1		9		(7	)		2
Non-compete Agreements		36		(36	)		—		36		(36	)		—
Trade Names		11		(10	)		1		11		(10	)		1

Total Customer and Marketing Related		741		(322	)		419		751		(260	)		491

Contract based, Technology and Other		4		(3	)		1		4		(3	)		1

Total amortizable intangible assets	$	745	$	(325	)	$	420	$	755	$	(263	)	$	492

Estimated aggregate amortization of intangible assets for each of the next five years


	(millions)

2012	$	61
2013		53
2014		45
2015		38
2016		33
Thereafter		190

Total	$	420

- Definition

Tabular disclosure of amortizable intangibles assets, in total and by major class, including the gross carrying amount and accumulated amortization. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References+ Details

Pension Plans (Tables)

12 Months Ended

Dec. 31, 2011

Defined Benefit Plan Disclosure [Line Items]

Changes in the UK pension plan's Level 3 assets


	UK Pension
	Plan
	Level 3
	(millions)

Balance at January 1, 2010	$	328
Purchases, sales, issuances and settlements, net		156
Unrealized gains relating to instruments still held at end of year		22
Foreign exchange		(6	)

Balance at December 31, 2010	$	500
Purchases, sales, issuances and settlements, net		2
Unrealized gains relating to instruments still held at end of year		5
Foreign exchange		(5	)

Balance at December 31, 2011	$	502

UK Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of defined benefit pension plan assets fair value measured on a recurring basis


	UK Pension Plan
December 31, 2011	Level 1		Level 2			Level 3		Total
			(millions)

Equity securities:
US equities	$	422	$	93		$	—	$	515
UK equities		278		41			—		319
Other equities		15		137			—		152
Fixed income securities:
US Government bonds		—		—			—		—
UK Government bonds		599		—			—		599
Other Government bonds		1		—			—		1
UK corporate bonds		63		—			—		63
Other corporate bonds		23		—			—		23
Derivatives		—		158			—		158
Real estate		—		—			86		86
Cash		28		—			—		28
Other investments:
Hedge funds		—		—			414		414
Other		—		(7	)		2		(5	)

Total	$	1,429	$	422		$	502	$	2,353


	UK Pension Plan
December 31, 2010	Level 1		Level 2			Level 3		Total
			(millions)

Equity securities:
US equities	$	421	$	90		$	—	$	511
UK equities		303		97			—		400
Other equities		—		149			—		149
Fixed income securities:
US Government bonds		49		—			—		49
UK Government bonds		348		—			—		348
Other Government bonds		17		—			—		17
UK corporate bonds		57		—			—		57
Other corporate bonds		14		—			—		14
Derivatives		—		22			—		22
Real estate		—		—			83		83
Cash		31		—			—		31
Other investments:
Hedge funds		—		—			415		415
Other		—		(13	)		2		(11	)

Total	$	1,240	$	345		$	500	$	2,085

US Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of defined benefit pension plan assets fair value measured on a recurring basis


	US Pension Plan
December 31, 2011	Level 1		Level 2		Level 3		Total
			(millions)

Equity securities:
US equities	$	172	$	—	$	—	$	172
Non US equities		106		—		—		106
Fixed income securities:
US Government bonds		—		55		—		55
US corporate bonds		—		252		—		252
Non US Government bonds		48		—		—		48
Cash		—		4		—		4
Other investments:
Other		—		—		—		—

Total	$	326	$	311	$	—	$	637


	US Pension Plan
December 31, 2010	Level 1		Level 2			Level 3		Total
			(millions)

Equity securities:
US equities	$	201	$	—		$	—	$	201
Non US equities		127		—			—		127
Fixed income securities:
US Government bonds		112		—			—		112
US corporate bonds		111		—			—		111
Non US Government bonds		47		—			—		47
Cash		—		5			—		5
Other investments:
Other		—		(1	)		—		(1	)

Total	$	598	$	4		$	—	$	602

US and UK Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of defined benefit pension plans


	UK Pension Benefits						US Pension Benefits
	2011			2010			2011			2010
	(millions)

Change in benefit obligation:
Benefit obligation, beginning of year	$	1,906		$	1,811		$	756		$	686
Service cost		36			37			—			—
Interest cost		106			100			41			40
Employee contributions		2			2			—			—
Actuarial loss		272			84			127			57
Benefits paid		(72	)		(72	)		(29	)		(27	)
Foreign currency changes		(23	)		(56	)		—			—
Plan amendments		(10	)		—			—			—

Benefit obligations, end of year		2,217			1,906			895			756

Change in plan assets:
Fair value of plan assets, beginning of year		2,085			1,880			602			529
Actual return on plan assets		269			245			34			70
Employee contributions		2			2			—			—
Employer contributions		92			88			30			30
Benefits paid		(72	)		(72	)		(29	)		(27	)
Foreign currency changes		(23	)		(58	)		—			—

Fair value of plan assets, end of year		2,353			2,085			637			602

Funded status at end of year	$	136		$	179		$	(258	)	$	(154	)

Components on the Consolidated Balance Sheets:
Pension benefits asset	$	136		$	179		$	—		$	—
Liability for pension benefits		—			—			(258	)		(154	)

Amounts recognized in accumulated other comprehensive loss


	UK Pension Benefits						US Pension Benefits
	2011			2010			2011		2010
				(millions)

Net actuarial loss	$	698		$	571		$	303	$	169
Prior service gain		(35	)		(30	)		—		—

Components of the net periodic benefit cost and other amounts


	Years ended December 31,
	UK Pension Benefits									US Pension Benefits
	2011			2010			2009			2011			2010			2009
							(millions)

Components of net periodic benefit cost:
Service cost	$	36		$	37		$	28		$	—		$	—		$	7
Interest cost		106			100			96			41			40			40
Expected return on plan assets		(161	)		(141	)		(127	)		(44	)		(42	)		(36	)
Amortization of unrecognized prior service gain		(5	)		(5	)		(5	)		—			—			—
Amortization of unrecognized actuarial loss		30			37			33			3			3			8
Curtailment gain		—			—			—			—			—			(12	)

Net periodic benefit cost (income)	$	6		$	28		$	25		$	—		$	1		$	7

Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Net actuarial (gain) loss	$	164		$	(20	)	$	102		$	137		$	29		$	(31	)
Amortization of unrecognized actuarial loss⁽ⁱ⁾		(30	)		(37	)		(33	)		(3	)		(3	)		(12	)
Prior service gain		(10	)		—			—			—			—			—
Amortization of unrecognized prior service gain		5			5			5			—			—			—
Curtailment gain		—			—			—			—			—			12

Total recognized in other comprehensive (loss) income	$	129		$	(52	)	$	74		$	134		$	26		$	(31	)

Total recognized in net periodic benefit cost and other comprehensive income	$	135		$	(24	)	$	99		$	134		$	27		$	(24	)


⁽ⁱ⁾		2009 US Pension Benefits figure includes $4 million due to curtailment.

Estimated net loss and prior service cost to be amortized from accumulated other comprehensive loss into net periodic benefit cost


	UK Pension		US Pension
	Benefits		Benefits
	(millions)

Estimated net loss	$	40	$	8
Prior service gain		6		—

Schedule of other information concerning defined benefit pension plans


	Years ended December 31,
	UK Pension Benefits						US Pension Benefits
	2011			2010			2011			2010

Weighted-average assumptions to determine benefit obligations:
Discount rate		4.8	%		5.5	%		4.6	%		5.6	%
Rate of compensation increase		2.1	%		2.6	%		N/A			N/A

Weighted-average assumptions to determine net periodic benefit cost:
Discount rate		5.5	%		5.8	%		5.6	%		6.1	%
Expected return on plan assets		7.5	%		7.8	%		7.5	%		8.0	%
Rate of compensation increase		2.6	%		2.5	%		N/A			N/A

Pension plan asset allocations based on fair values


	Years ended December 31,
	UK Pension Benefits						US Pension Benefits
Asset Category	2011			2010			2011			2010

Equity securities		42	%		51	%		43	%		54	%
Debt securities		35	%		24	%		56	%		45	%
Hedge funds		18	%		20	%		—	%		—	%
Real estate		4	%		4	%		—	%		—	%
Cash		1	%		1	%		1	%		1	%

Total		100	%		100	%		100	%		100	%

Expected future benefit payments


	UK Pension		US Pension
Expected future benefit payments	Benefits		Benefits
	(millions)

2012	$	73	$	33
2013		76		36
2014		78		39
2015		81		42
2016		82		44
2017-2021		450		256

International Pension Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of defined benefit pension plans


	International Pension
	Benefits
	2011			2010
	(millions)

Change in benefit obligation:
Benefit obligation, beginning of year	$	135		$	150
Service cost		4			4
Interest cost		7			7
Actuarial (gain) loss		(4	)		(4	)
Benefits paid		(6	)		(15	)
Curtailment		(1	)		1
Foreign currency changes		(4	)		(8	)

Benefit obligations, end of year		131			135

Change in plan assets:
Fair value of plan assets, beginning of year		125			120
Actual return on plan assets		1			15
Employer contributions		13			12
Benefits paid		(6	)		(15	)
Foreign currency changes		(5	)		(7	)

Fair value of plan assets, end of year		128			125

Funded status at end of year	$	(3	)	$	(10	)

Components on the Consolidated Balance Sheets:
Pension benefits asset	$	9		$	3
Liability for pension benefits	$	(12	)	$	(13	)

Components of the net periodic benefit cost and other amounts


	International Pension Benefits
	2011			2010			2009
	(millions)

Components of net periodic benefit cost:
Service cost	$	4		$	4		$	6
Interest cost		7			7			8
Expected return on plan assets		(6	)		(6	)		(6	)
Amortization of unrecognized actuarial loss		1			—			2
Curtailment (gain) loss		(1	)		1			—
Other		—			—			—

Net periodic benefit cost	$	5		$	6		$	10

Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Amortization of unrecognized actuarial loss	$	(1	)	$	—		$	(2	)
Net actuarial gain		2			(13	)		(2	)

Total recognized in other comprehensive loss		1			(13	)		(4	)

Total recognized in net periodic benefit cost and other comprehensive (loss) income	$	6		$	(7	)	$	6

Schedule of other information concerning defined benefit pension plans


	International
	Pension Benefits
	2011		2010

Weighted-average assumptions to determine benefit obligations:
Discount rate		3.30% – 5.30%		4.00% – 5.10%
Rate of compensation increase		2.50% – 3.00%		2.50% – 3.00%
Weighted-average assumptions to determine net periodic benefit cost:
Discount rate		4.00% – 5.10%		5.00% – 5.30%
Expected return on plan assets		4.80% – 5.73%		4.60% – 6.31%
Rate of compensation increase		2.50% – 3.00%		2.00% – 3.00%

Pension plan asset allocations based on fair values


	International
	Pension Benefits
Asset Category	2011			2010

Equity securities		35	%		44	%
Debt securities		58	%		42	%
Real estate		4	%		4	%
Other		3	%		10	%

Total		100	%		100	%

Schedule of defined benefit pension plan assets fair value measured on a recurring basis


	International Pension Plans
December 31, 2011	Level 1		Level 2		Level 3		Total
			(millions)

Equity securities:
US equities	$	20	$	—	$	—	$	20
UK equities		4		—		—		4
Overseas equities		18		—		1		19
Unit linked funds		—		—		—		—
Fixed income securities:
Other Government bonds		48		1		—		49
Real estate		—		—		5		5
Cash		4		—		—		4
Other investments:
Derivative instruments		—		22		—		22
Other investments		—		—		5		5

Total	$	94	$	23	$	11	$	128


	International Pension Plans
December 31, 2010	Level 1		Level 2		Level 3		Total
			(millions)

Equity securities:
US equities	$	21	$	—	$	—	$	21
UK equities		4		—		—		4
Overseas equities		20		—		—		20
Unit linked funds		7		—		—		7
Fixed income securities:
Other Government bonds		29		2		—		31
Real estate		—		—		5		5
Cash		11		—		—		11
Other investments:
Derivative instruments		—		21		—		21
Other investments		—		—		5		5

Total	$	92	$	23	$	10	$	125

Expected future benefit payments


	International
	Pension
Expected future benefit payments	Benefits
	(millions)

2012	$	3
2013		4
2014		4
2015		4
2016		4
2017-2021		23

Debt (Tables)

12 Months Ended

Dec. 31, 2011

Debt [Abstract]

Short term debt and current portion of long-term debt


	December 31,
	2011		2010
	(millions)

Current portion of 5-year term loan facility expires 2016	$	11	$	—
Current portion of 5-year term loan facility repaid 2011		—		110
6.000% loan notes due 2012		4		—

	$	15	$	110

Long-term debt


	December 31,
	2011		2010
	(millions)

5-year term loan facility expires 2016	$	289	$	—
5-year term loan facility repaid 2011		—		301
Revolving $300 million credit facility		—		90
6.000% loan notes due 2012		—		4
5.625% senior notes due 2015		350		350
Fair value adjustment on 5.625% senior notes due 2015		20		12
12.875% senior notes due 2016		—		500
4.125% senior notes due 2016		299		—
6.200% senior notes due 2017		600		600
7.000% senior notes due 2019		300		300
5.750% senior notes due 2021		496		—

	$	2,354	$	2,157

Analysis of interest expense


	Year ended December 31,
	2011		2010		2009
	(millions)

5-year term loan facility repaid 2011	$	14	$	17	$	26
Revolving $300 million credit facility		4		3		3
5.625% senior notes due 2015		12		14		20
12.875% senior notes due 2016		15		67		55
4.125% senior notes due 2016		10		—		—
6.200% senior notes due 2017		38		38		38
7.000% senior notes due 2019		21		21		5
5.125% senior notes due 2010		—		3		16
5.750% senior notes due 2021		23		—		—
Interim credit facility		—		—		7
Other⁽ⁱ⁾		19		3		4

Total interest expense	$	156	$	166	$	174


⁽ⁱ⁾		Other includes $10 million relating to the write off of unamortized debt issuance fees.

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

+ Details

Provisions for Liabilities (Tables)

12 Months Ended

Dec. 31, 2011

Provisions for Liabilities [Abstract]

Analysis of movements on provisions for liabilities


	Claims,
	lawsuits and
	other			Other
	proceedings⁽ⁱ⁾			provisions⁽ⁱⁱ⁾			Total
				(millions)

Balance at January 1, 2010	$	178		$	48		$	226
Net provisions made during the year		19			(7	)		12
Utilised in the year		(50	)		(7	)		(57	)
Foreign currency translation adjustment		(2	)		—			(2	)

Balance at December 31, 2010	$	145		$	34		$	179
Net provisions made during the year		45			11			56
Utilised in the year		(31	)		(7	)		(38	)
Foreign currency translation adjustment		(1	)		—			(1	)

Balance at December 31, 2011	$	158		$	38		$	196


⁽ⁱ⁾		The claims, lawsuits and other proceedings provision includes E&O cases which represents management’s assessment of liabilities that may arise from asserted and unasserted claims for alleged errors and omissions that arise in the ordinary course of the Group’s business. Where some of the potential liability is recoverable under the Group’s external insurance arrangements, the full assessment of the liability is included in the provision with the associated insurance recovery shown separately as an asset. Insurance recoveries recognised at December 31, 2011 amounted to $6 million (2010: $15 million).


⁽ⁱⁱ⁾		The ‘Other’ category includes amounts relating to vacant property provisions of $20 million (2010: $14 million).

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies [Abstract]

Contractual obligations


					Payments due by
Obligations	Total		2012		2013-2014		2015-2016		After 2016
	(millions)

5-year term loan facility expires 2016	$	300	$	11	$	30	$	259	$	—
Interest on term loan		28		6		12		10		—
Revolving $500 million credit facility commitment fees		6		1		3		2		—
6.000% loan notes due 2012		4		4		—		—		—
5.625% senior notes due 2015		350		—		—		350		—
Fair value adjustments on 5.625% senior notes due 2015		20		—		—		20		—
4.125% senior notes due 2016		300		—		—		300		—
6.200% senior notes due 2017		600		—		—		—		600
7.000% senior notes due 2019		300		—		—		—		300
5.750% senior notes due 2021		500		—		—		—		500
Interest on senior notes		744		119		238		200		187

Total debt and related interest		3,152		141		283		1,141		1,587
Operating leases⁽ⁱ⁾		1,307		146		203		151		807
Pensions		386		91		181		114		—
Other contractual obligations⁽ⁱⁱ⁾		164		72		13		37		42

Total contractual obligations	$	5,009	$	450	$	680	$	1,443	$	2,436


⁽ⁱ⁾		Presented gross of sublease income.


⁽ⁱⁱ⁾		Other contractual obligations include capital lease commitments, put option obligations and investment fund capital call obligations, the timing of which are included at the earliest point they may fall due.

Future minimum rental commitments under all non-cancellable operating lease agreements


	Gross rental		Rentals from			Net rental
	commitments		subleases			commitments
			(millions)

2012	$	146	$	(14	)	$	132
2013		109		(14	)		95
2014		94		(13	)		81
2015		79		(12	)		67
2016		72		(11	)		61
Thereafter		807		(32	)		775

Total	$	1,307	$	(96	)	$	1,211

Accumulated Other Comprehensive Loss, Net of Tax (Tables)

12 Months Ended

Dec. 31, 2011

Accumulated Other Comprehensive Loss, Net of Tax and Equity and Noncontrolling Interests [Abstract]

Components of comprehensive income (loss)


	Years ended December 31,
	2011			2010			2009
	(millions)

Net income	$	220		$	470		$	459
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment (net of tax of $nil in 2011, 2010 and 2009)		(29	)		(8	)		27
Unrealized holding gain (loss) (net of tax of $nil in 2011, 2010 and 2009)		—			2			(1	)
Pension funding adjustment (net of tax of $84 million in 2011, $(12) million in 2010 and $6 million in 2009)		(172	)		51			(33	)
Net (loss) gain on derivative instruments (net of tax of $2 million in 2011, $(3) million in 2010 and $(16) million in 2009)		(3	)		6			43

Other comprehensive (loss) income (net of tax of $86 million in 2011, $(15) million in 2010 and $(10) million in 2009)		(204	)		51			36

Comprehensive income		16			521			495
Noncontrolling interests		(15	)		(13	)		(21	)

Comprehensive income attributable to Willis Group Holdings	$	1		$	508		$	474

Components of accumulated other comprehensive loss, net of tax


	December 31,
	2011			2010			2009
	(millions)

Net foreign currency translation adjustment	$	(80	)	$	(52	)	$	(46	)
Net unrealized holding loss		—			—			(2	)
Pension funding adjustment		(675	)		(503	)		(554	)
Net unrealized gain on derivative instruments		11			14			8

Accumulated other comprehensive loss, attributable to Willis Group Holdings, net of tax	$	(744	)	$	(541	)	$	(594	)

- Definition

Tabular disclosure of components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans.

+ References+ Details

Equity and Noncontrolling Interest (Tables)

12 Months Ended

Dec. 31, 2011

Accumulated Other Comprehensive Loss, Net of Tax and Equity and Noncontrolling Interests [Abstract]

Equity and noncontrolling interests


	December 31, 2011									December 31, 2010									December 31, 2009
	Willis									Willis									Willis
	Group									Group									Group
	Holdings’			Noncontrolling			Total			Holdings’			Noncontrolling			Total			Holdings’			Noncontrolling			Total
	stockholders			interests			equity			stockholders			interests			equity			stockholders			interests			equity

Balance at January 1,	$	2,577		$	31		$	2,608		$	2,180		$	49		$	2,229		$	1,845		$	50		$	1,895
Comprehensive income:
Net income		204			16			220			455			15			470			438			21			459
Other comprehensive income, net of tax		(203	)		(1	)		(204	)		53			(2	)		51			36			—			36

Comprehensive income		1			15			16			508			13			521			474			21			495
Dividends		(180	)		(15	)		(195	)		(178	)		(26	)		(204	)		(172	)		(17	)		(189	)
Additional paid-in capital		88			—			88			67			—			67			32			—			32
Shares reissued under stock compensation plans		—			—			—			—			—			—			1			—			1
Purchase of subsidiary shares from noncontrolling interests		—			—			—			—			(5	)		(5	)		—			(10	)		(10	)
Additional noncontrolling interests		—			—			—			—			—			—			—			5			5

Balance at December 31,	$	2,486		$	31		$	2,517		$	2,577		$	31		$	2,608		$	2,180		$	49		$	2,229

Effects of changes in ownership interest in subsidiaries


	Years ended December 31,
	2011		2010			2009
			(millions)

Net income attributable to Willis Group Holdings	$	204	$	455		$	438
Transfers from noncontrolling interest:
Decrease in Willis Group Holdings’ paid-in capital for purchase of noncontrolling interest		—		(19	)		(23	)
Increase in Willis Group Holdings’ paid-in capital for sale of noncontrolling interest		—		—			1

Net transfers from noncontrolling interest		—		(19	)		(22	)

Change from net income attributable to Willis Group Holdings and transfers from noncontrolling interests	$	204	$	436		$	416

- Definition

The tabular disclosure of the effects of any changes in a parent's ownership interest in a subsidiary on the equity attributable to the parent if the ownership interests in a subsidiary changes during the period. The changes represented by this element did not result in the deconsolidation of the subsidiary.

+ References+ Details

Supplemental Disclosures of Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2011

Supplemental Disclosures of Cash Flow Information [Abstract]

Supplemental disclosures regarding cash flow information and non-cash flow investing and financing activities


	Years Ended December 31,
	2011			2010			2009
	(millions)

Supplemental disclosures of cash flow information:
Cash payments for income taxes, net	$	15		$	99		$	80
Cash payments for interest		128			163			179

Supplemental disclosures of non-cash flow investing and financing activities:
Write-off of unamortized debt issuance costs	$	(23	)	$	—		$	—
Assets acquired under capital leases		—			23			—
Non cash proceeds from reorganization of investments in associates (Note 6)		—			—			126
Issue of stock on acquisitions of subsidiaries		—			—			1
Issue of loan notes on acquisitions of noncontrolling interests		—			—			13
Issue of stock on acquisitions of noncontrolling interests		—			—			11
Deferred payments on acquisitions of subsidiaries		3			—			1
Deferred payments on acquisitions of noncontrolling interests		8			13			1

Acquisitions:
Fair value of assets acquired	$	6		$	12		$	28
Less:
Liabilities assumed		(3	)		(18	)		(55	)
Cash acquired		(3	)		—			(12	)

Net liabilities assumed, net of cash acquired	$	—		$	(6	)	$	(39	)

Derivative Financial Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2011

Derivative Financial Instruments and Hedging Activities [Abstract]

Interest rate risk


		December 31,
						Weighted Average
		Notional		Termination		Interest Rates
		Amount⁽ⁱ⁾		Dates		Receive		Pay
		(millions)				%		%

2011
US dollar	Receive fixed-pay variable	$	740		2012-2015		2.20		0.88
Pounds sterling	Receive fixed-pay variable		241		2012-2015		3.00		1.35
Euro	Receive fixed-pay variable		143		2012-2015		2.31		1.33
2010
US dollar	Receive fixed-pay variable	$	725		2011-2014		2.44		1.33
Pounds sterling	Receive fixed-pay variable		229		2011-2014		3.16		1.88
Euro	Receive fixed-pay variable		155		2011-2014		2.18		1.81


⁽ⁱ⁾		Notional amounts represent US dollar equivalents translated at the spot rate as of December 31.

Foreign currency risk


	December 31,
	Sell		Sell
	2011⁽ⁱ⁾		2010
	(millions)

US dollar	$	235	$	315
Euro		129		157
Japanese yen		50		64


⁽ⁱ⁾		Forward exchange contracts range in maturity from 2012 to 2014.

Derivative financial and hedging instruments


		Fair value
	Balance sheet	December 31,		December 31,
Derivative financial instruments designated as hedging instruments:	classification	2011		2010
		(millions)

Assets:
Interest rate swaps (cash flow hedges)	Other assets	$	15	$	17
Interest rate swaps (fair value hedges)	Other assets		26		14
Forward exchange contracts	Other assets		11		16

Total derivatives designated as hedging instruments		$	52	$	47

Liabilities:
Interest rate swaps (cash flow hedges)	Other liabilities	$	—	$	2
Forward exchange contracts	Other liabilities		11		10

Total derivatives designated as hedging instruments		$	11	$	12

Derivatives in cash flow hedging relationships


								Amount of
								gain (loss)
				Amount of				recognized
				gain (loss)				in income
	Amount of			reclassified				on derivative
	gain (loss)			from				(ineffective
	recognized			accumulated			Location of gain (loss)	hedges and
	in OCI⁽ⁱ⁾		Location of gain (loss)	OCI⁽ⁱ⁾ into			recognized in income	ineffective
	on derivative		reclassified from	income			on derivative (ineffective	element of
Derivatives in cash flow	(effective		accumulated OCI⁽ⁱ⁾ into	(effective			hedges and ineffective	effective
hedging relationships	element)		income (effective element)	element)			element of effective hedges)	hedges)
	(millions)			(millions)				(millions)

Year ended December 31, 2011
Interest rate swaps	$	13	Investment income	$	(14	)	Other operating expenses	$	—
Forward exchange contracts		3	Other operating expenses		(7	)	Interest expense		(2	)

Total	$	16		$	(21	)		$	(2	)

Year ended December 31, 2010
Interest rate swaps	$	15	Investment income	$	(26	)	Other operating expenses	$	—
Forward exchange contracts		—	Other operating expenses		20		Interest expense		—

Total	$	15		$	(6	)		$	—

Year ended December 31, 2009
Interest rate swaps	$	16	Investment income	$	(27	)	Other operating expenses	$	(1	)
Forward exchange contracts		25	Other operating expenses		45		Interest expense		—

Total	$	41		$	18			$	(1	)

Amounts above shown gross of tax.


⁽ⁱ⁾		OCI means other comprehensive income.

Derivative in fair value hedging relationships


				Loss			Ineffectiveness
		Gain		recognized			recognized in
	Hedged item in fair value	recognized		for hedged			interest
Derivatives in fair value hedging relationships	hedging relationship	for derivative		item			expense
		(millions)

Year ended December 31, 2011
Interest rate swaps	5.625% senior notes due 2015	$	7	$	(8	)	$	1

Year ended December 31, 2010
Interest rate swaps	5.625% senior notes due 2015	$	14	$	(12	)	$	(2	)

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References+ Details

- Definition

Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.

+ References+ Details

Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Measurements [Abstract]

Assets and liabilities measured at fair value on a recurring basis


	December 31, 2011
	Quoted
	prices in
	active
	markets		Significant		Significant
	for		other		other
	identical		observable		unobservable
	assets		inputs		inputs
	Level 1		Level 2		Level 3		Total
			(millions)

Assets at fair value:
Cash and cash equivalents	$	436	$	—	$	—	$	436
Fiduciary funds (included within Fiduciary assets)		1,688		—		—		1,688
Derivative financial instruments		—		52		—		52

Total assets	$	2,124	$	52	$	—	$	2,176

Liabilities at fair value:
Derivative financial instruments	$	—	$	11	$	—	$	11
Changes in fair value of hedged debt⁽ⁱ⁾		—		20		—		20

Total liabilities	$	—	$	31	$	—	$	31


⁽ⁱ⁾		Changes in the fair value of the underlying hedged debt instrument since inception of the hedging relationship are included in long-term debt.


	December 31, 2010
	Quoted
	prices in
	active
	markets		Significant		Significant
	for		other		other
	identical		observable		unobservable
	assets		inputs		inputs
	Level 1		Level 2		Level 3		Total
			(millions)

Assets at fair value:
Cash and cash equivalents	$	316	$	—	$	—	$	316
Fiduciary funds (included within Fiduciary assets)		1,764		—		—		1,764
Derivative financial instruments		—		47		—		47

Total assets	$	2,080	$	47	$	—	$	2,127

Liabilities at fair value:
Derivative financial instruments	$	—	$	12	$	—	$	12
Changes in fair value of hedged debt⁽ⁱ⁾		—		12		—		12

Total liabilities	$	—	$	24	$	—	$	24


⁽ⁱ⁾		Changes in the fair value of the underlying hedged debt instrument since inception of the hedging relationship are included in long-term debt.

Summary of the estimated fair value of the company's financial instruments held or issued to finance the company's operations


	December 31,
	2011				2010
	Carrying		Fair		Carrying		Fair
	amount		value		amount		value
			(millions)

Assets:
Cash and cash equivalents	$	436	$	436	$	316	$	316
Fiduciary funds (included within Fiduciary assets)		1,688		1,688		1,764		1,764
Derivative financial instruments		52		52		47		47
Liabilities:
Short-term debt	$	15	$	15	$	110	$	110
Long-term debt		2,354		2,499		2,157		2,450
Derivative financial instruments		11		11		12		12

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 14

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15

-Subparagraph b-d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph a, c(1), c(2), c(3), d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph c(2), d, e, f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 19

-Subparagraph a, b, c(1), d(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13467-108611

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13476-108611

Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 30

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

+ Details

Segment Information (Tables)

12 Months Ended

Dec. 31, 2011

Segment Information [Abstract]

Information regarding operating segments


													Interest in
									Depreciation				earnings of
	Commissions		Investment		Other		Total		and		Operating		associates,
	and fees		income		income		revenues		amortization		income		net of tax
							(millions)

Year ended December 31, 2011
Global	$	1,073	$	9	$	—	$	1,082	$	23	$	352	$	—
North America		1,314		7		2		1,323		28		271		—
International		1,027		15		—		1,042		18		221		12

Total Retail		2,341		22		2		2,365		46		492		12

Total Operating Segments		3,414		31		2		3,447		69		844		12
Corporate and Other⁽ⁱ⁾		—		—		—		—		73		(278)		—

Total Consolidated	$	3,414	$	31	$	2	$	3,447	$	142	$	566	$	12

Year ended December 31, 2010
Global	$	987	$	9	$	—	$	996	$	18	$	320	$	—
North America		1,369		15		1		1,385		23		320		—
International		937		14		—		951		22		226		23

Total Retail		2,306		29		1		2,336		45		546		23

Total Operating Segments		3,293		38		1		3,332		63		866		23
Corporate and Other⁽ⁱ⁾		—		—		—		—		82		(113)		—

Total Consolidated	$	3,293	$	38	$	1	$	3,332	$	145	$	753	$	23

Year ended December 31, 2009
Global	$	921	$	17	$	—	$	938	$	15	$	311	$	—
North America		1,381		15		3		1,399		23		328		—
International		898		18		—		916		26		216		33

Total Retail		2,279		33		3		2,315		49		544		33

Total Operating Segments		3,200		50		3		3,253		64		855		33
Corporate and Other⁽ⁱ⁾		—		—		—		—		100		(165)		—

Total Consolidated	$	3,200	$	50	$	3	$	3,253	$	164	$	690	$	33


⁽ⁱ⁾		See the following table for an analysis of the ‘Corporate and other’ line.

Corporate and other information


	Years ended December 31,
	2011			2010			2009
	(millions)

Amortization of intangible assets	$	(68	)	$	(82	)	$	(100	)
Foreign exchange hedging		5			(16	)		(42	)
Foreign exchange gain (loss) on the UK pension plan asset		—			3			(6	)
HRH integration costs		—			—			(18	)
Net gain (loss) on disposal of operations		4			(2	)		13
2011 Operational Review		(180	)		—			—
FSA regulatory settlement		(11	)		—			—
Venezuela currency devaluation		—			(12	)		—
Write-off of uncollectible accounts receivable balance in North America		(22	)		—			—
Redomicile of parent company costs		—			—			(6	)
Other^(a)		(6	)		(4	)		(6	)

Total Corporate and Other	$	(278	)	$	(113	)	$	(165	)


^(a)		Other includes $12 million (2010: $7 million, 2009: $nil) from the release of funds and reserves related to potential legal liabilities.

Total consolidated operating income


	Years ended December 31,
	2011			2010			2009
	(millions)

Total consolidated operating income	$	566		$	753		$	690
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs		(171	)		—			—
Interest expense		(156	)		(166	)		(174	)

Income from continuing operations before income taxes and interest in earnings of associates	$	239		$	587		$	516

Operating segment revenue by product


	Years ended December 31,
	2011		2010		2009		2011		2010		2009		2011		2010		2009		2011		2010		2009
	Global						North America						International						Total
	(millions)

Commissions and fees:
Retail insurance services	$	—	$	—	$	—	$	1,314	$	1,369	$	1,381	$	1,027	$	937	$	898	$	2,341	$	2,306	$	2,279
Specialty insurance services		1,073		987		921		—		—		—		—		—		—		1,073		987		921

Total commissions and fees		1,073		987		921		1,314		1,369		1,381		1,027		937		898		3,414		3,293		3,200
Investment income		9		9		17		7		15		15		15		14		18		31		38		50
Other income		—		—		—		2		1		3		—		—		—		2		1		3

Total Revenues	$	1,082	$	996	$	938	$	1,323	$	1,385	$	1,399	$	1,042	$	951	$	916	$	3,447	$	3,332	$	3,253

Information regarding geographic locations


	Years Ended December 31,
	2011		2010		2009
	(millions)

Commissions and fees⁽ⁱ⁾
UK	$	963	$	902	$	859
US		1,461		1,503		1,508
Other⁽ⁱⁱ⁾		990		888		833

Total	$	3,414	$	3,293	$	3,200


	December 31,
	2011		2010
	(millions)

Fixed assets
UK	$	171	$	163
US		194		178
Other⁽ⁱⁱ⁾		41		40

Total	$	406	$	381


⁽ⁱ⁾		Commissions and fees are attributed to countries based upon the location of the subsidiary generating the revenue.


⁽ⁱⁱ⁾		Other than in the United Kingdom and the United States, the Company does not conduct business in any country in which its commissions and fees and/or fixed assets exceed 10 percent of consolidated commissions and fees and/or fixed assets, respectively.

- Definition

Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries.

+ References+ Details

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References+ Details

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non Guarantor Subsidiaries (Tables)

12 Months Ended

Dec. 31, 2011

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries [Abstract]

Condensed Consolidating Statement of Operations

Condensed Consolidating Statement of Operations


	Year ended December 31, 2011
	Willis
	Group			The Other			The						Consolidating
	Holdings			Guarantors			Issuer			Other			adjustments			Consolidated
							(millions)


REVENUES
Commissions and fees	$	—		$	—		$	—		$	3,414		$	—		$	3,414
Investment income		—			11			2			29			(11	)		31
Other income		—			—			—			24			(22	)		2

Total revenues		—			11			2			3,467			(33	)		3,447

EXPENSES
Salaries and benefits		(3	)		—			(69	)		(2,015	)		—			(2,087	)
Other operating expenses		(17	)		32			(98	)		(571	)		(2	)		(656	)
Depreciation expense		—			—			(14	)		(60	)		—			(74	)
Amortization of intangible assets		—			—			—			(74	)		6			(68	)
Net gain on disposal of operations		—			—			—			7			(3	)		4

Total expenses		(20	)		32			(181	)		(2,713	)		1			(2,881	)

OPERATING (LOSS) INCOME		(20	)		43			(179	)		754			(32	)		566
Investment income from Group undertakings		35			406			341			(157	)		(625	)		—
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs		—			(171	)		—			—			—			(171	)
Interest expense		(34	)		(251	)		(159	)		(332	)		620			(156	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		(19	)		27			3			265			(37	)		239
Income taxes		—			56			27			(117	)		2			(32	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		(19	)		83			30			148			(35	)		207
Interest in earnings of associates, net of tax		—			—			—			4			8			12

(LOSS) INCOME FROM CONTINUING OPERATIONS		(19	)		83			30			152			(27	)		219
Discontinued operations, net of tax		—			—			—			1			—			1

NET (LOSS) INCOME		(19	)		83			30			153			(27	)		220
Less: Net income attributable to noncontrolling interests		—			—			—			(16	)		—			(16	)
EQUITY ACCOUNT FOR SUBSIDIARIES		223			91			(66	)		—			(248	)		—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	204		$	174		$	(36	)	$	137		$	(275	)	$	204

Condensed Consolidating Statement of Operations


	Year Ended December 31, 2010
	Willis
	Group			The Other			The						Consolidating
	Holdings			Guarantors			Issuer			Other			adjustments			Consolidated
							(millions)

REVENUES
Commissions and fees	$	—		$	—		$	—		$	3,293		$	—		$	3,293
Investment income		—			10			2			36			(10	)		38
Other income		—			—			—			1			—			1

Total revenues		—			10			2			3,330			(10	)		3,332

EXPENSES
Salaries and benefits		—			—			(65	)		(1,818	)		15			(1,868	)
Other operating expenses		335			(10	)		(45	)		(825	)		(19	)		(564	)
Depreciation expense		—			—			(9	)		(54	)		—			(63	)
Amortization of intangible assets		—			—			—			(82	)		—			(82	)
Net (loss) gain on disposal of operations		(347	)		—			—			350			(5	)		(2	)

Total expenses		(12	)		(10	)		(119	)		(2,429	)		(9	)		(2,579	)

OPERATING (LOSS) INCOME		(12	)		—			(117	)		901			(19	)		753
Investment income from Group undertakings		—			1,683			356			952			(2,991	)		—
Interest expense		—			(423	)		(157	)		(374	)		788			(166	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		(12	)		1,260			82			1,479			(2,222	)		587
Income taxes		—			16			29			(186	)		1			(140	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		(12	)		1,276			111			1,293			(2,221	)		447
Interest in earnings of associates, net of tax		—			—			—			16			7			23

(LOSS) INCOME FROM CONTINUING OPERATIONS		(12	)		1,276			111			1,309			(2,214	)		470

NET (LOSS) INCOME		(12	)		1,276			111			1,309			(2,214	)		470
Less: Net income attributable to noncontrolling interests		—			—			—			(15	)		—			(15	)
EQUITY ACCOUNT FOR SUBSIDIARIES		467			(823	)		(76	)		—			432			—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	455		$	453		$	35		$	1,294		$	(1,782	)	$	455

Condensed Consolidating Statement of Operations


	Year ended December 31, 2009
	Willis
	Group		The Other			The						Consolidating
	Holdings		Guarantors			Issuer			Other			adjustments			Consolidated
						(millions)

REVENUES
Commissions and fees	$	—	$	—		$	—		$	3,200		$	—		$	3,200
Investment income		—		—			4			46			—			50
Other income		—		—			—			3			—			3

Total revenues		—		—			4			3,249			—			3,253

EXPENSES
Salaries and benefits		—		—			(28	)		(1,803	)		9			(1,822	)
Other operating expenses		—		57			(34	)		(617	)		4			(590	)
Depreciation expense		—		—			(8	)		(56	)		—			(64	)
Amortization of intangible assets		—		—			—			(100	)		—			(100	)
Net gain on disposal of operations		—		—			—			13			—			13

Total expenses		—		57			(70	)		(2,563	)		13			(2,563	)

OPERATING INCOME (LOSS)		—		57			(66	)		686			13			690
Investment income from Group undertakings		—		917			492			504			(1,913	)		—
Interest expense		—		(415	)		(173	)		(346	)		760			(174	)

INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		—		559			253			844			(1,140	)		516
Income taxes		—		(5	)		20			(110	)		1			(94	)

INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		—		554			273			734			(1,139	)		422
Interest in earnings of associates, net of tax		—		—			—			33			—			33

INCOME FROM CONTINUING OPERATIONS		—		554			273			767			(1,139	)		455
Discontinued operations, net of tax		—		—			—			4			—			4

NET INCOME		—		554			273			771			(1,139	)		459
Less: Net income attributable to noncontrolling interests		—		—			—			(4	)		(17	)		(21	)
EQUITY ACCOUNT FOR SUBSIDIARIES		438		(156	)		(30	)		—			(252	)		—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	438	$	398		$	243		$	767		$	(1,408	)	$	438

Condensed Consolidating Balance Sheet

Condensed Consolidating Balance Sheet


	As at December 31, 2011
	Willis
	Group			The Other			The					Consolidating
	Holdings			Guarantors			Issuer		Other			adjustments			Consolidated
							(millions)

ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	—		$	—		$	163	$	273		$	—		$	436
Accounts receivable, net		2			—			3		877			28			910
Fiduciary assets		—			—			—		9,941			(603	)		9,338
Deferred tax assets		—			1			—		43			—			44
Other current assets		1			52			21		271			(86	)		259

Total current assets		3			53			187		11,405			(661	)		10,987

Investments in subsidiaries		(1,023	)		3,778			1,482		3,848			(8,085	)		—
Amounts owed by (to) Group undertakings		4,354			(4,716	)		476		(114	)		—			—
NON-CURRENT ASSETS
Fixed assets, net		—			4			59		345			(2	)		406
Goodwill		—			—			—		1,704			1,591			3,295
Other intangible assets, net		—			—			—		435			(15	)		420
Investments in associates		—			—			—		(45	)		215			170
Deferred tax assets		—			—			—		22			—			22
Pension benefits asset		—			—			—		145			—			145
Other non-current assets		5			170			43		192			(127	)		283

Total non-current assets		5			174			102		2,798			1,662			4,741

TOTAL ASSETS	$	3,339		$	(711	)	$	2,247	$	17,937		$	(7,084	)	$	15,728


LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES
Fiduciary liabilities	$	—		$	—		$	—	$	9,941		$	(603	)	$	9,338
Deferred revenue and accrued expenses		2			—			—		318			—			320
Income taxes payable		—			40			—		30			(55	)		15
Short-term debt and current portion of long-term debt		—			11			—		4			—			15
Deferred tax liabilities		—			—			1		25			—			26
Other current liabilities		56			11			57		185			(27	)		282

Total current liabilities		58			62			58		10,503			(685	)		9,996

NON-CURRENT LIABILITIES
Long-term debt		795			289			1,270		—			—			2,354
Liabilities for pension benefits		—			—			—		270			—			270
Deferred tax liabilities		—			5			35		(9	)		1			32
Provisions for liabilities		—			—			—		198			(2	)		196
Other non-current liabilities		—			9			9		345			—			363

Total non-current liabilities		795			303			1,314		804			(1	)		3,215

TOTAL LIABILITIES	$	853		$	365		$	1,372	$	11,307		$	(686	)	$	13,211

EQUITY
Total Willis Group Holdings stockholders’ equity		2,486			(1,076	)		875		6,599			(6,398	)		2,486
Noncontrolling interests		—			—			—		31			—			31

Total equity		2,486			(1,076	)		875		6,630			(6,398	)		2,517

TOTAL LIABILITIES AND EQUITY	$	3,339		$	(711	)	$	2,247	$	17,937		$	(7,084	)	$	15,728

Condensed Consolidating Balance Sheet


	As at December 31, 2010
	Willis
	Group			The Other			The					Consolidating
	Holdings			Guarantors			Issuer		Other			adjustments			Consolidated
							(millions)

ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	—		$	—		$	76	$	240		$	—		$	316
Accounts receivable, net		2			—			—		809			28			839
Fiduciary assets		—			—			—		10,167			(598	)		9,569
Deferred tax assets		—			—			1		35			—			36
Other current assets		—			23			57		293			(33	)		340

Total current assets		2			23			134		11,544			(603	)		11,100

Investments in subsidiaries		(1,039	)		3,814			1,455		3,855			(8,085	)		—
Amounts owed by (to) Group undertakings		3,659			(4,590	)		1,002		(71	)		—			—
NON-CURRENT ASSETS
Fixed assets, net		—			—			52		330			(1	)		381
Goodwill		—			—			—		1,696			1,598			3,294
Other intangible assets, net		—			—			—		492			—			492
Investments in associates		—			—			—		(51	)		212			161
Deferred tax assets		—			—			—		7			—			7
Pension benefits asset		—			—			—		182			—			182
Other non-current assets		—			166			41		149			(123	)		233

Total non-current assets		—			166			93		2,805			1,686			4,750

TOTAL ASSETS	$	2,622		$	(587	)	$	2,684	$	18,133		$	(7,002	)	$	15,850


LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES
Fiduciary liabilities	$	—		$	—		$	—	$	10,167		$	(598	)	$	9,569
Deferred revenue and accrued expenses		1			—			—		297			—			298
Income taxes payable		—			—			—		69			(12	)		57
Short-term debt and current portion of long-term debt		—			—			110		—			—			110
Deferred tax liabilities		—			3			1		5			—			9
Other current liabilities		44			15			38		189			(20	)		266

Total current liabilities		45			18			149		10,727			(630	)		10,309

NON-CURRENT LIABILITIES
Long-term debt		—			500			1,653		4			—			2,157
Liabilities for pension benefits		—			—			—		167			—			167
Deferred tax liabilities		—			3			26		54			—			83
Provisions for liabilities		—			—			—		183			(4	)		179
Other non-current liabilities		—			10			16		321			—			347

Total non-current liabilities		—			513			1,695		729			(4	)		2,933

TOTAL LIABILITIES	$	45		$	531		$	1,844	$	11,456		$	(634	)	$	13,242

EQUITY
Total Willis Group Holdings stockholders’ equity		2,577			(1,118	)		840		6,646			(6,368	)		2,577
Noncontrolling interests		—			—			—		31			—			31

Total equity		2,577			(1,118	)		840		6,677			(6,368	)		2,608

TOTAL LIABILITIES AND EQUITY	$	2,622		$	(587	)	$	2,684	$	18,133		$	(7,002	)	$	15,850

Condensed Consolidating Statement of Cash Flows

Condensed Consolidating Statement of Cash Flows


	Year ended December 31, 2011
	Willis
	Group			The Other			The						Consolidating
	Holdings			Guarantors			Issuer			Other			adjustments			Consolidated
							(millions)

NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	(41	)	$	184		$	88		$	1,269		$	(1,061	)	$	439

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—			—			—			13			—			13
Purchases of fixed assets		—			(4	)		(21	)		(86	)		—			(111	)
Acquisitions of subsidiaries, net of cash acquired		—			—			—			(10	)		—			(10	)
Acquisitions of investments in associates		—			—			—			(2	)		—			(2	)
Investment in Trident V Parallel Fund, LP		—			—			—			(5	)		—			(5	)
Proceeds from sale of discontinued operations, net of cash disposed		—			—			—			14			—			14

Net cash used in investing activities		—			(4	)		(21	)		(76	)		—			(101	)

CASH FLOWS FROM FINANCING ACTIVITIES
Repayments on revolving credit facility		—			—			(90	)		—			—			(90	)
Senior notes issued		794			—			—			—			—			794
Debt issuance costs		(7	)		(5	)		—			—			—			(12	)
Proceeds from issue term loan		—			300			—			—			—			300
Repayments of debt		—			(500	)		(411	)		—			—			(911	)
Make-whole on repurchase and redemption of senior notes		—			(158	)		—			—			—			(158	)
Proceeds from issue of shares		60			—			—			—			—			60
Excess tax benefits from share-based payment arrangement		—			—			—			5			—			5
Amounts owed (to) by Group undertakings		(626	)		187			521			(82	)		—			—
Dividends paid		(180	)		—			—			(1,061	)		1,061			(180	)
Acquisition of noncontrolling interests		—			(4	)		—			(5	)		—			(9	)
Dividends paid to noncontrolling interests		—			—			—			(13	)		—			(13	)

Net cash provided by (used in) financing activities		41			(180	)		20			(1,156	)		1,061			(214	)

INCREASE IN CASH AND CASH EQUIVALENTS		—			—			87			37			—			124
Effect of exchange rate changes on cash and cash equivalents		—			—			—			(4	)		—			(4	)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—			—			76			240			—			316

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—		$	—		$	163		$	273		$	—		$	436

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2010
	Willis
	Group			The Other			The						Consolidating
	Holdings			Guarantors			Issuer			Other			adjustments			Consolidated
							(millions)

NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	(9	)	$	1,170		$	83		$	1,572		$	(2,327	)	$	489

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—			—			—			10			—			10
Additions to fixed assets		—			—			(7	)		(76	)		—			(83	)
Acquisitions of subsidiaries, net of cash acquired		—			—			—			(21	)		—			(21	)
Acquisitions of investments in associates		—			—			—			(1	)		—			(1	)
Investment in Trident V Parallel Fund, LP		—			—			—			(1	)		—			(1	)
Proceeds from sale of continuing operations, net of cash disposed		—			—			—			2			—			2

Net cash used in investing activities		—			—			(7	)		(87	)		—			(94	)

CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from draw down of revolving credit facility		—			—			90			—			—			90
Repayments of debt		—			—			(200	)		(9	)		—			(209	)
Proceeds from issue of shares		36			—			—			—			—			36
Excess tax benefits from share-based payment arrangement		—			—			—			2			—			2
Amounts owed by (to) Group undertakings		106			(317	)		6			205			—			—
Dividends paid		(133	)		(849	)		—			(1,521	)		2,327			(176	)
Acquisition of noncontrolling interests		—			(4	)		—			(6	)		—			(10	)
Dividends paid to noncontrolling interests		—			—			—			(26	)		—			(26	)

Net cash provided by (used in) financing activities		9			(1,170	)		(104	)		(1,355	)		2,327			(293	)

(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS		—			—			(28	)		130			—			102
Effect of exchange rate changes on cash and cash equivalents		—			—			—			(7	)		—			(7	)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—			—			104			117			—			221

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—		$	—		$	76		$	240		$	—		$	316

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2009
	Willis
	Group		The Other			The						Consolidating
	Holdings		Guarantors			Issuer			Other			adjustments			Consolidated
						(millions)

NET CASH PROVIDED BY OPERATING ACTIVITIES	$	—	$	867		$	390		$	27		$	(865	)	$	419

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—		—			—			20			—			20
Additions to fixed assets		—		—			(17	)		(79	)		—			(96	)
Acquisitions of investments in associates		—		—			—			(42	)		—			(42	)
Proceeds from reorganization of investments in associates		—		—			—			155			—			155
Proceeds from sale of continuing operations, net of cash disposed		—		—			—			4			—			4
Proceeds from sale of discontinued operations, net of cash disposed		—		—			—			40			—			40
Proceeds on sale of short-term investments		—		—			—			21			—			21

Net cash (used in) provided by investing activities		—		—			(17	)		119			—			102

CASH FLOWS FROM FINANCING ACTIVITIES
Repayments of debt		—		—			(1,090	)		1			—			(1,089	)
Senior notes issued		—		500			300			—			—			800
Debt issuance costs		—		(18	)		(4	)		—			—			(22	)
Proceeds from issue of shares		—		—			—			18			—			18
Amounts owed by and to Group undertakings		—		(646	)		525			121			—			—
Excess tax benefits from share-based payment arrangements		—		—			—			1			—			1
Dividends paid		—		(703	)		—			(336	)		865			(174	)
Acquisition of noncontrolling interests		—		—			—			(33	)		—			(33	)
Dividends paid to noncontrolling interests		—		—			—			(17	)		—			(17	)

Net cash used in financing activities		—		(867	)		(269	)		(245	)		865			(516	)

INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		—		—			104			(99	)		—			5
Effect of exchange rate changes on cash and cash equivalents		—		—			—			11			—			11
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—		—			—			205			—			205

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—	$	—		$	104		$	117		$	—		$	221

Financial Information for Parent Issuer, Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Tables)

12 Months Ended

Dec. 31, 2011

Financial Information for Parent Issuer Guarantor Subsidiaries and Non-Guarantor Subsidiaries Disclosure [Abstract]

Condensed Consolidated Statement of Operations

Condensed Consolidating Statement of Operations


	Year ended December 31, 2011
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

REVENUES
Commissions and fees	$	—		$	—		$	3,414		$	—		$	3,414
Investment income		—			13			29			(11	)		31
Other income		—			—			24			(22	)		2

Total revenues		—			13			3,467			(33	)		3,447

EXPENSES
Salaries and benefits		(3	)		(69	)		(2,015	)		—			(2,087	)
Other operating expenses		(17	)		(66	)		(571	)		(2	)		(656	)
Depreciation expense		—			(14	)		(60	)		—			(74	)
Amortization of intangible assets		—			—			(74	)		6			(68	)
Net gain on disposal of operations		—			—			7			(3	)		4

Total expenses		(20	)		(149	)		(2,713	)		1			(2,881	)

OPERATING (LOSS) INCOME		(20	)		(136	)		754			(32	)		566
Investment income from Group undertakings		35			747			(157	)		(625	)		—
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs		—			(171	)		—			—			(171	)
Interest expense		(34	)		(410	)		(332	)		620			(156	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		(19	)		30			265			(37	)		239
Income taxes		—			83			(117	)		2			(32	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		(19	)		113			148			(35	)		207
Interest in earnings of associates, net of tax		—			—			4			8			12

(LOSS) INCOME FROM CONTINUING OPERATIONS		(19	)		113			152			(27	)		219
Discontinued operations, net of tax		—			—			1			—			1

NET (LOSS) INCOME		(19	)		113			153			(27	)		220
Less: Net income attributable to noncontrolling interests		—			—			(16	)		—			(16	)
EQUITY ACCOUNT FOR SUBSIDIARIES		223			61			—			(284	)		—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	204		$	174		$	137		$	(311	)	$	204

Condensed Consolidating Statement of Operations


	Year Ended December 31, 2010
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

REVENUES
Commissions and fees	$	—		$	—		$	3,293		$	—		$	3,293
Investment income		—			12			36			(10	)		38
Other income		—			—			1			—			1

Total revenues		—			12			3,330			(10	)		3,332

EXPENSES
Salaries and benefits		—			(65	)		(1,818	)		15			(1,868	)
Other operating expenses		335			(55	)		(825	)		(19	)		(564	)
Depreciation expense		—			(9	)		(54	)		—			(63	)
Amortization of intangible assets		—			—			(82	)		—			(82	)
Net (loss) gain on disposal of operations		(347	)		—			350			(5	)		(2	)

Total expenses		(12	)		(129	)		(2,429	)		(9	)		(2,579	)

OPERATING (LOSS) INCOME		(12	)		(117	)		901			(19	)		753
Investment income from Group undertakings		—			2,039			952			(2,991	)		—
Interest expense		—			(580	)		(374	)		788			(166	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		(12	)		1,342			1,479			(2,222	)		587
Income taxes		—			45			(186	)		1			(140	)

(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		(12	)		1,387			1,293			(2,221	)		447
Interest in earnings of associates, net of tax		—			—			16			7			23

(LOSS) INCOME FROM CONTINUING OPERATIONS		(12	)		1,387			1,309			(2,214	)		470

NET (LOSS) INCOME		(12	)		1,387			1,309			(2,214	)		470
Less: Net income attributable to noncontrolling interests		—			—			(15	)		—			(15	)
EQUITY ACCOUNT FOR SUBSIDIARIES		467			(934	)		—			467			—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	455		$	453		$	1,294		$	(1,747	)	$	455

Condensed Consolidating Statement of Operations


	Year Ended December 31, 2009
	Willis
	Group
	Holdings —
	the Parent		The						Consolidating
	Issuer		Guarantors			Other			adjustments			Consolidated
	(millions)

REVENUES
Commissions and fees	$	—	$	—		$	3,200		$	—		$	3,200
Investment income		—		4			46			—			50
Other income		—		—			3			—			3

Total revenues		—		4			3,249			—			3,253

EXPENSES
Salaries and benefits		—		(28	)		(1,803	)		9			(1,822	)
Other operating expenses		—		23			(617	)		4			(590	)
Depreciation expense		—		(8	)		(56	)		—			(64	)
Amortization of intangible assets		—		—			(100	)		—			(100	)
Net gain on disposal of operations		—		—			13			—			13

Total expenses		—		(13	)		(2,563	)		13			(2,563	)

OPERATING (LOSS) INCOME		—		(9	)		686			13			690
Investment income from Group undertakings		—		1,409			504			(1,913	)		—
Interest expense		—		(588	)		(346	)		760			(174	)

INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES		—		812			844			(1,140	)		516
Income taxes		—		15			(110	)		1			(94	)

INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES		—		827			734			(1,139	)		422
Interest in earnings of associates, net of tax		—		—			33			—			33

INCOME FROM CONTINUING OPERATIONS		—		827			767			(1,139	)		455
Discontinued operations, net of tax		—		—			4			—			4

NET INCOME		—		827			771			(1,139	)		459
Less: Net income attributable to noncontrolling interests		—		—			(4	)		(17	)		(21	)
EQUITY ACCOUNT FOR SUBSIDIARIES		438		(429	)		—			(9	)		—

NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	$	438	$	398		$	767		$	(1,165	)	$	438

Condensed Consolidated Balance Sheet

Condensed Consolidating Balance Sheet


	As at December 31, 2011
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	—		$	163		$	273		$	—		$	436
Accounts receivable, net		2			3			877			28			910
Fiduciary assets		—			—			9,941			(603	)		9,338
Deferred tax assets		—			1			43			—			44
Other current assets		1			73			271			(86	)		259

Total current assets		3			240			11,405			(661	)		10,987

Investments in subsidiaries		(1,023	)		4,385			3,848			(7,210	)		—
Amounts owed by (to) Group undertakings		4,354			(4,240	)		(114	)		—			—
NON-CURRENT ASSETS
Fixed assets, net		—			63			345			(2	)		406
Goodwill		—			—			1,704			1,591			3,295
Other intangible assets, net		—			—			435			(15	)		420
Investments in associates		—			—			(45	)		215			170
Deferred tax assets		—			—			22			—			22
Pension benefits asset		—			—			145			—			145
Other non-current assets		5			213			192			(127	)		283

Total non-current assets		5			276			2,798			1,662			4,741


TOTAL ASSETS	$	3,339		$	661		$	17,937		$	(6,209	)	$	15,728


LIABILITIES AND STOCKHOLDERS’ EQUITY

CURRENT LIABILITIES
Fiduciary liabilities	$	—		$	—		$	9,941		$	(603	)	$	9,338
Deferred revenue and accrued expenses		2			—			318			—			320
Income taxes payable		—			40			30			(55	)		15
Short-term debt and current portion on long-term debt		—			11			4			—			15
Deferred tax liabilities		—			1			25			—			26
Other current liabilities		56			68			185			(27	)		282

Total current liabilities		58			120			10,503			(685	)		9,996


NON-CURRENT LIABILITIES
Long-term debt		795			1,559			—			—			2,354
Liabilities for pension benefits		—			—			270			—			270
Deferred tax liabilities		—			40			(9	)		1			32
Provisions for liabilities		—			—			198			(2	)		196
Other non-current liabilities		—			18			345			—			363

Total non-current liabilities		795			1,617			804			(1	)		3,215

TOTAL LIABILITIES	$	853		$	1,737		$	11,307		$	(686	)	$	13,211

EQUITY
Total Willis Group Holdings stockholders’ equity		2,486			(1,076	)		6,599			(5,523	)		2,486
Noncontrolling interests		—			—			31			—			31

Total equity		2,486			(1,076	)		6,630			(5,523	)		2,517

TOTAL LIABILITIES AND EQUITY	$	3,339		$	661		$	17,937		$	(6,209	)	$	15,728

Condensed Consolidating Balance Sheet


	As at December 31, 2010
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	—		$	76		$	240		$	—		$	316
Accounts receivable, net		2			—			809			28			839
Fiduciary assets		—			—			10,167			(598	)		9,569
Deferred tax assets		—			1			35			—			36
Other current assets		—			80			293			(33	)		340

Total current assets		2			157			11,544			(603	)		11,100

Investments in subsidiaries		(1,039	)		4,429			3,855			(7,245	)		—
Amounts owed by (to) Group undertakings		3,659			(3,588	)		(71	)		—			—
NON-CURRENT ASSETS
Fixed assets, net		—			52			330			(1	)		381
Goodwill		—			—			1,696			1,598			3,294
Other intangible assets, net		—			—			492			—			492
Investments in associates		—			—			(51	)		212			161
Deferred tax assets		—			—			7			—			7
Pension benefits asset		—			—			182			—			182
Other non-current assets		—			207			149			(123	)		233

Total non-current assets		—			259			2,805			1,686			4,750

TOTAL ASSETS	$	2,622		$	1,257		$	18,133		$	(6,162	)	$	15,850


LIABILITIES AND STOCKHOLDERS’ EQUITY

CURRENT LIABILITIES
Fiduciary liabilities	$	—		$	—		$	10,167		$	(598	)	$	9,569
Deferred revenue and accrued expenses		1			—			297			—			298
Income taxes payable		—			—			69			(12	)		57
Short-term debt and current portion of long-term debt		—			110			—			—			110
Deferred tax liabilities		—			4			5			—			9
Other current liabilities		44			53			189			(20	)		266

Total current liabilities		45			167			10,727			(630	)		10,309


NON-CURRENT LIABILITIES
Long-term debt		—			2,153			4			—			2,157
Liabilities for pension benefits		—			—			167			—			167
Deferred tax liabilities		—			29			54			—			83
Provisions for liabilities		—			—			183			(4	)		179
Other non-current liabilities		—			26			321			—			347

Total non-current liabilities		—			2,208			729			(4	)		2,933

TOTAL LIABILITIES	$	45		$	2,375		$	11,456		$	(634	)	$	13,242

EQUITY
Total Willis Group Holdings stockholders’ equity		2,577			(1,118	)		6,646			(5,528	)		2,577
Noncontrolling interests		—			—			31			—			31

Total equity		2,577			(1,118	)		6,677			(5,528	)		2,608

TOTAL LIABILITIES AND EQUITY	$	2,622		$	1,257		$	18,133		$	(6,162	)	$	15,850

Condensed Consolidated Statement of Cash Flows

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2011
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	(41	)	$	272		$	1,269		$	(1,061	)	$	439

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—			—			13			—			13
Purchases of fixed assets		—			(25	)		(86	)		—			(111	)
Acquisitions of subsidiaries, net of cash acquired		—			—			(10	)		—			(10	)
Acquisitions of investments in associates		—			—			(2	)		—			(2	)
Investment in Trident V Parallel Fund, LP		—			—			(5	)		—			(5	)
Proceeds from sale of discontinued operations, net of cash disposed		—			—			14			—			14

Net cash used in investing activities		—			(25	)		(76	)		—			(101	)

CASH FLOWS FROM FINANCING ACTIVITIES
Repayments on revolving credit facility		—			(90	)		—			—			(90	)
Senior notes issued		794			—			—			—			794
Debt issuance costs		(7	)		(5	)		—			—			(12	)
Proceeds from issue term loan		—			300			—			—			300
Repayments of debt		—			(911	)		—			—			(911	)
Make-whole on repurchase and redemption of senior notes		—			(158	)		—			—			(158	)
Proceeds from issue of shares		60			—			—			—			60
Excess tax benefits from share-based payment arrangement		—			—			5			—			5
Amounts owed (to) by Group undertakings		(626	)		708			(82	)		—			—
Dividends paid		(180	)		—			(1,061	)		1,061			(180	)
Acquisition of noncontrolling interests		—			(4	)		(5	)		—			(9	)
Dividends paid to noncontrolling interests		—			—			(13	)		—			(13	)

Net cash provided by (used in) financing activities		41			(160	)		(1,156	)		1,061			(214	)

INCREASE IN CASH AND CASH EQUIVALENTS		—			87			37			—			124
Effect of exchange rate changes on cash and cash equivalents		—			—			(4	)		—			(4	)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—			76			240			—			316

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—		$	163		$	273		$	—		$	436

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2010
	Willis
	Group
	Holdings —
	the Parent			The						Consolidating
	Issuer			Guarantors			Other			adjustments			Consolidated
	(millions)

NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	(9	)	$	1,253		$	1,572		$	(2,327	)	$	489

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—			—			10			—			10
Additions to fixed assets		—			(7	)		(76	)		—			(83	)
Acquisitions of subsidiaries, net of cash acquired		—			—			(21	)		—			(21	)
Acquisitions of investments in associates		—			—			(1	)		—			(1	)
Investment in Trident V Parallel Fund, LP		—			—			(1	)		—			(1	)
Proceeds from sale of continuing operations, net of cash disposed		—			—			2			—			2

Net cash used in investing activities		—			(7	)		(87	)		—			(94	)

CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from draw down of revolving credit facility		—			90			—			—			90
Repayments of debt		—			(200	)		(9	)		—			(209	)
Proceeds from issue of shares		36			—			—			—			36
Excess tax benefits from share-based payment arrangement		—			—			2			—			2
Amounts owed by (to) Group undertakings		106			(311	)		205			—			—
Dividends paid		(133	)		(849	)		(1,521	)		2,327			(176	)
Acquisition of noncontrolling interests		—			(4	)		(6	)		—			(10	)
Dividends paid to noncontrolling interests		—			—			(26	)		—			(26	)

Net cash provided by (used in) financing activities		9			(1,274	)		(1,355	)		2,327			(293	)

(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS		—			(28	)		130			—			102
Effect of exchange rate changes on cash and cash equivalents		—			—			(7	)		—			(7	)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—			104			117			—			221

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—		$	76		$	240		$	—		$	316

Condensed Consolidating Statement of Cash Flows


	Year Ended December 31, 2009
	Willis
	Group
	Holdings —
	the Parent		The						Consolidating
	Issuer		Guarantors			Other			adjustments			Consolidated
	(millions)

NET CASH PROVIDED BY OPERATING ACTIVITIES	$	—	$	1,257		$	27		$	(865	)	$	419

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		—		—			20			—			20
Additions to fixed assets		—		(17	)		(79	)		—			(96	)
Acquisitions of investments in associates		—		—			(42	)		—			(42	)
Proceeds from reorganization of investments in associates		—		—			155			—			155
Proceeds from sale of continuing operations, net of cash disposed		—		—			4			—			4
Proceeds from sale of discontinued operations, net of cash disposed		—		—			40			—			40
Proceeds on sale of short-term investments		—		—			21			—			21

Net cash (used in) provided by investing activities		—		(17	)		119			—			102

CASH FLOWS FROM FINANCING ACTIVITIES
Repayments of debt		—		(1,090	)		1			—			(1,089	)
Senior notes issued		—		800			—			—			800
Debt issuance costs		—		(22	)		—			—			(22	)
Proceeds from issue of shares		—		—			18			—			18
Amounts owed by (to) Group undertakings		—		(121	)		121			—			—
Excess tax benefits from share-based payment arrangements		—		—			1			—			1
Dividends paid		—		(703	)		(336	)		865			(174	)
Acquisition of noncontrolling interests		—		—			(33	)		—			(33	)
Dividends paid to noncontrolling interests		—		—			(17	)		—			(17	)

Net cash used in financing activities		—		(1,136	)		(245	)		865			(516	)

INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		—		104			(99	)		—			5
Effect of exchange rate changes on cash and cash equivalents		—		—			11			—			11
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		—		—			205			—			205

CASH AND CASH EQUIVALENTS, END OF YEAR	$	—	$	104		$	117		$	—		$	221

Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Data [Unaudited] [Abstract]

Quarterly financial data

Quarterly financial data for 2011 and 2010 were as follows:


	Three Months Ended
	March 31,			June 30,			September 30,			December 31,
	(millions, except per share data)

2011
Total revenues	$	1,007		$	861		$	760		$	819
Total expenses		(768	)		(705	)		(670	)		(738	)
Net income		42			89			60			29
Net income attributable to Willis Group Holdings		34			85			60			25
Earnings per share — continuing operations
— Basic	$	0.20		$	0.49		$	0.35		$	0.14
— Diluted	$	0.20		$	0.48		$	0.34		$	0.14
Earnings per share — discontinued operations
— Basic	$	—		$	—		$	—		$	—
— Diluted	$	—		$	—		$	—		$	—

2010
Total revenues	$	971		$	797		$	731		$	833
Total expenses		(669	)		(629	)		(625	)		(656	)
Net income		211			91			65			103
Net income attributable to Willis Group Holdings		204			89			64			98
Earnings per share — continuing operations
— Basic	$	1.21		$	0.52		$	0.38		$	0.57
— Diluted	$	1.21		$	0.51		$	0.37		$	0.57
Earnings per share — discontinued operations
— Basic	$	—		$	—		$	—		$	—
— Diluted	$	—		$	—		$	—		$	—

Basis of Presentation and Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2011
Basis of presentation and significant accounting policies (Textual) [Abstract]
Depreciation on buildings and long leaseholds	calculated over the lesser of 50 years or the lease term.
Depreciation on furniture and equipment	calculated based on a range of 3 to 10 years
Equity ownership	Company has an equity ownership in the voting stock of the investee between 20 and 50 percent
Tax benefit	greater than 50 percent likely to be realized on settlement with the tax authority, assuming full knowledge of the position and all relevant facts.
Amortization of gains or losses over the average remaining service period of the employees	If gain/(losses) exceed ten percent of the greater of plan assets or plan liabilities

Employees (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Salaries and benefits expense
Salaries and other compensation awards including amortization of cash retention awards of $185 million, $119 million and $88 million	$ 1,776	$ 1,618	$ 1,570
Share-based compensation	41	47	39
Severance costs	89	15	24
Social security costs	130	119	117
Retirement benefits-defined benefit plan expense	11	35	42
Retirement benefits - defined contribution plan expense	40	34	30
Total salaries benefit expense	$ 2,087	$ 1,868	$ 1,822

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References+ Details

- Definition

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS146-1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5-8

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 112

-Paragraph 7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 146

-Paragraph 8-13, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 5.P.3)

-URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140864-122747

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140904-122747

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)(10)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

+ Details

Employees (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Severance liability
Severance costs accrued	$ 89
Employee Severance [Member]
Severance liability
Balance at January 1, 2011	0
Severance costs accrued	89
Cash payments	(64)
Foreign exchange	(1)
Balance at December 31,2011	$ 24

- Definition

Amount of foreign currency translation adjustment increasing or decreasing the accrual for a specified type of restructuring cost.

+ References+ Details

Employees (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Position	Dec. 31, 2010 Position	Dec. 31, 2009 Position
Employee (Textual) [Abstract]
Amortization of cash retention awards	$ 185	$ 119	$ 88
Operational Review - total severance costs	89
Operational Review - positions eliminated	1,200
Operational Review - one-time benefit arrangement severance costs	81
Operational Review - existing benefit arrangement severance costs	8
Operational review - write-off of retention awards charge	9
Positions eliminated	1,200
Severance cost arising in normal course of business	89	15	24
Approximate number of positions that have been or are in the process of being eliminated in the normal course of business	100	550	450
Unamortized cash retention awards	$ 196	$ 173	$ 98

Share-Based Compensation (Details)	12 Months Ended
Share-Based Compensation (Details)	Dec. 31, 2011 Y	Dec. 31, 2010 Y	Dec. 31, 2009 Y
Option valuation assumptions
Expected volatility	31.40%	30.40%	32.40%
Expected dividends	2.50%	3.40%	3.90%
Expected life (years)	6	5	5
Risk-free interest rate	2.20%	2.20%	3.00%

- Definition

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

+ References+ Details

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References+ Details

Share-Based Compensation (Details 1) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Summary of restricted stock unit activity under share based compensation plans
Shares, Balance beginning of year	1,798,000
Weighted Average Grant Date Fair Value, Balance beginning of year	$ 28.82
Shares, Granted	346,000
Weighted Average Grant Date Fair Value, Granted	$ 40.77
Shares, Vested	(918,000)
Weighted Average Grant Date Fair Value, Vested	$ 29.31
Shares, Forfeited	(34,000)
Weighted Average Grant Date Fair Value, Forfeited	$ 27.18
Shares, Balance end of year	1,192,000
Weighted Average Grant Date Fair Value, Balance end of year	$ 31.96
Time Based Stock Options [Member]
Summary of option activity under share based compensation plans
Shares, Balance beginning of year	11,449,000
Weighted Average Exercise Price, Balance beginning of year	$ 32.73
Options, Granted	140,000
Weighted Average Exercise Price, Granted	$ 30.30
Options, Exercised	(1,769,000)
Weighted Average Exercise Price, Exercised	$ 29.44
Options, Forfeited	(521,000)
Weighted Average Exercise Price, Forfeited	$ 32.46
Options, Expired	(125,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price	$ 32.17
Shares, Balance end of year	9,174,000
Weighted Average Exercise Price, Balance end of year	$ 33.35
Weighted Average Remaining Contractual Term, end of year	3
Aggregate Intrinsic Value, end of year	$ 50
Options vested or expected to vest at December 31, 2011	8,896,000
Weighted Average Exercise Price, Options vested or expected to vest at December 31,2011	$ 33.51
Weighted Average Remaining Contractual Term, Options vested or expected to vest at December 31,2011	3
Aggregate Intrinsic Value, Options vested or expected to vest at December 31,2011	49
Options exercisable at December 31, 2011	7,702,000
Weighted Average Exercise Price, Options exercisable at December 31,2011	$ 34.07
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	3
Aggregate Intrinsic Value, Options Exercisable at December 31,2011	38
Performance Based Stock Options [Member]
Summary of option activity under share based compensation plans
Shares, Balance beginning of year	9,449,000
Weighted Average Exercise Price, Balance beginning of year	$ 32.14
Options, Granted	1,523,000
Weighted Average Exercise Price, Granted	$ 41.40
Options, Exercised	(96,000)
Weighted Average Exercise Price, Exercised	$ 29.61
Options, Forfeited	(3,593,000)
Weighted Average Exercise Price, Forfeited	$ 36.23
Shares, Balance end of year	7,283,000
Weighted Average Exercise Price, Balance end of year	$ 32.09
Weighted Average Remaining Contractual Term, end of year	6
Aggregate Intrinsic Value, end of year	49
Options vested or expected to vest at December 31, 2011	6,227,000
Weighted Average Exercise Price, Options vested or expected to vest at December 31,2011	$ 32.30
Weighted Average Remaining Contractual Term, Options vested or expected to vest at December 31,2011	6
Aggregate Intrinsic Value, Options vested or expected to vest at December 31,2011	44
Options exercisable at December 31, 2011	1,879,000
Weighted Average Exercise Price, Options exercisable at December 31,2011	$ 32.80
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	5
Aggregate Intrinsic Value, Options Exercisable at December 31,2011	$ 11

Share-Based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-Based Compensation (Textual) [Abstract]
Number of restricted stock units	918,000
Share-based Compensation (Additional Textual) [Abstract]
Share-based compensation	$ 41	$ 47	$ 39
Income tax benefit for share based compensation arrangements	11	14	12
Cash received from option exercises	60	37	19
Tax benefit realized from option exercises	18	10	5
2001 Share Purchase And Option Plan [Member]
Share-Based Compensation (Textual) [Abstract]
Options are exercisable	variety of dates, including from the first, second, third, sixth or eighth anniversary of grant
Plan adoption date	May 3, 2001
Plan expiry date	May 3, 2011
2008 Share Purchase and Option Plan [Member]
Share-Based Compensation (Textual) [Abstract]
Shares available for grant under this plan	8,000,000
Options are exercisable	variety of dates, including from the third, fourth or fifth anniversary of grant
Plan expiry period	10 years
Plan adoption date	April 23 2008
Employee Stock Purchase Plans [Member]
Share-Based Compensation (Textual) [Abstract]
Plan expiry date	May 31 2011
Time Based Stock Options [Member]
Share-Based Compensation (Textual) [Abstract]
Weighted average grant-date fair value	$ 9.49	$ 5.25	$ 5.87
Intrinsic value of options exercised	17	8	3
Unrecognized compensation cost related to nonvested share-based compensation	7
Weighted average period in which cost is expected to be recognized	2
Performance Based Stock Options [Member]
Share-Based Compensation (Textual) [Abstract]
Weighted average grant-date fair value	$ 10.26	$ 7.11	$ 5.89
Intrinsic value of options exercised	1		1
Unrecognized compensation cost related to nonvested share-based compensation	26
Weighted average period in which cost is expected to be recognized	3
Restricted Stock [Member]
Share-Based Compensation (Textual) [Abstract]
Unrecognized compensation cost related to nonvested share-based compensation	$ 17
Weighted average period in which cost is expected to be recognized	2
Number of restricted stock units	918,480	744,633
Average share price	$ 39.52	$ 32.17

Auditors' Remuneration (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Analysis of auditor's remuneration
Audit of group consolidated financial statements	$ 4	$ 4	$ 3
Other assurance services	3	3	3
Other non-audit services	1	1
Total auditors' remuneration	$ 8	$ 8	$ 6

Net Gain (Loss) on Disposal of Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Analysis of the proceeds and calculation of gain
Net proceeds		$ 4	$ 315
Gain on disposal	2
Gras Savoye [Member]
Analysis of the proceeds and calculation of gain
Net proceeds			281
Less net assets disposed of			(97)
Less interest in new liabilities of Gras Savoye			(174)
Gain on disposal			10
Gras Savoye [Member] \| Cash [Member]
Analysis of the proceeds and calculation of gain
Net proceeds			155
Gras Savoye [Member] \| Vendor Loans [Member]
Analysis of the proceeds and calculation of gain
Net proceeds			47
Gras Savoye [Member] \| Convertible Bonds [Member]
Analysis of the proceeds and calculation of gain
Net proceeds			$ 79

- Definition

Gain (loss) after tax expense or benefit, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

+ References+ Details

Net Gain (Loss) on Disposal of Operations (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 17, 2009	Dec. 31, 1997
Net (Loss) Gain on Disposal of Operations (Textual) [Abstract]
Total proceeds		$ 4	$ 315
Disposals of operations		2
Deferred proceeds relating to prior year		2
Net gain (loss) on disposal of operations	4	(2)	13
Gain on disposal of discontinued operations, net of tax	2
Percentage owned by Group				30.00%	33.00%
Voting right of shareholder on company board				33.00%
Reduction of interest in Gras Savoye			49 percent to 31 percent
Gras Savoye [Member]
Net (Loss) Gain on Disposal of Operations (Textual) [Abstract]
Total proceeds			281
Percent interest sold on disposal of operation			18.00%
Gain on disposal of discontinued operations, net of tax			10
Percentage owned by Group	30.00%	31.00%	49.00%	31.00%
Reduction of interest in Gras Savoye	49 percent to 31 percent
Bliss & Glennon [Member]
Net (Loss) Gain on Disposal of Operations (Textual) [Abstract]
Total proceeds			$ 39
Ownership interest in group			100.00%

Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income from continuing operations before income taxes and interest in earnings of associates by location of taxing jurisdiction
Income from continuing operations before income taxes and interest in earnings of associates	$ 239	$ 587	$ 516
Current income taxes:
Irish corporation tax		1
US federal tax		(30)	40
US state and local taxes	1		17
UK corporation tax	(33)	54	17
Other jurisdictions	42	41	52
Total current taxes	10	66	126
Non-current taxes:
US federal tax	5	(3)	(9)
US state and local taxes		(3)	(2)
UK corporation tax	(4)
Other jurisdictions	4	3
Total non-current taxes	5	(3)	(11)
Deferred taxes:
US federal tax	(6)	57	(24)
US state and local taxes	1	9	(3)
UK corporation tax	20	3	1
Other jurisdictions	2	8	5
Total deferred taxes	17	77	(21)
Total income tax	32	140	94
Ireland [Member]
Income from continuing operations before income taxes and interest in earnings of associates by location of taxing jurisdiction
Income from continuing operations before income taxes and interest in earnings of associates	(39)	3	(2)
US [Member]
Income from continuing operations before income taxes and interest in earnings of associates by location of taxing jurisdiction
Income from continuing operations before income taxes and interest in earnings of associates	(25)	84	2
UK [Member]
Income from continuing operations before income taxes and interest in earnings of associates by location of taxing jurisdiction
Income from continuing operations before income taxes and interest in earnings of associates	(58)	183	204
Other Jurisdictions [Member]
Income from continuing operations before income taxes and interest in earnings of associates by location of taxing jurisdiction
Income from continuing operations before income taxes and interest in earnings of associates	$ 361	$ 317	$ 312

Income Taxes (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Reconciliation between US federal income taxes at the statutory rate and the Company's provision for income taxes on continuing operations
Income from continuing operations before income taxes and interest in earnings of associates	$ 239	$ 587	$ 516
US federal statutory income tax rate	35.00%	35.00%	35.00%
Income tax expense at US federal tax rate	84	205	181
Adjustments to derive effective rate:
Non-deductible expenditure	15	7	4
Movement in provision for non-current taxes	3	(3)	(11)
Release of provision for unremitted earnings			(27)
Impact of change in tax rate on deferred tax balances	(3)	(4)
Adjustment in respect of prior periods	(13)	(22)	(6)
Non-deductible Venezuelan foreign exchange loss		4
Non-taxable profit on disposal of Gras Savoye		1	(3)
Effect of foreign exchange and other differences	1	11	2
Changes in valuation allowances applied to deferred tax assets	5
Net tax effect of intra-group items	(31)	(26)
Tax differentials of foreign earnings:
UK earnings	6	(13)	(13)
Other jurisdictions and US state taxes	(35)	(20)	(33)
Total income tax	$ 32	$ 140	$ 94

Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Deferred tax assets:
Accrued expenses not currently deductible	$ 116	$ 34
US state net operating losses	56	47
US federal net operating losses	23
UK net operating losses	1	2
Other net operating losses	7	3
UK Capital losses	45	49
Accrued retirement benefits	105	62
Deferred compensation	45	46
Stock options	34	51
Gross deferred tax assets	432	294
Less: valuation allowance	(102)	(87)	(92)	(85)
Net deferred tax assets	330	207
Deferred tax liabilities:
Cost of intangible assets, net of related amortization	149	155
Cost of tangible assets, net of related amortization	42	25
Prepaid retirement benefits	36	50
Accrued revenue not currently taxable	26	7
Cash retention award	63	10
Tax-leasing transactions	2	3
Financial derivative transactions	4	6
Other	0	0
Deferred tax liabilities	322	256
Net deferred tax asset (liability)	8	(49)
Current:
Deferred tax assets	44	36
Deferred tax liabilities	(26)	(9)
Net current deferred tax assets	18	27
Non-current:
Deferred tax assets	22	7
Deferred tax liabilities	(32)	(83)
Net non-current deferred tax liabilities	(10)	(76)
Net deferred tax asset (liability)	$ 8	$ (49)

Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Summary valuation allowances
Beginning balance	$ 87	$ 92	$ 85
Deductions/Other movements	(15)	(4)	2
Foreign exchange differences		(1)	5
Ending balance	$ 102	$ 87	$ 92

- Definition

The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.

+ References+ Details

- Definition

The amount of the change in the period in the valuation allowance for a specified deferred tax asset.

+ References+ Details

Income Taxes (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Reconciliation of the beginning and ending amounts of unrecognized tax benefits
Beginning balance	$ 13	$ 17	$ 33
Reductions due to a lapse of the applicable statute of limitation		(7)	(11)
Adjustment to assessment of acquired HRH balances			(8)
Other movements	3	3	3
Ending balance	$ 16	$ 13	$ 17

Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Taxes (Textual) [Abstract]
Valuation allowances to reduce deferred tax assets to estimated realizable value	$ 102	$ 87	$ 92	$ 85
Valuation allowances relating to deferred tax assets arising from UK capital loss carryforwards	45
Deferred tax assets net of valuation allowance	330	207
Unrecognized Tax Benefits	16	13	17	33
Approximate tax benefits to be recognized relating to release of provisions no longer required	1
Foreign Country [Member]
Income Taxes (Additional Textual) [Abstract]
Valuation allowances relating to deferred tax assets arising from UK other net operating losses	6
US [Member]
Income Taxes (Additional Textual) [Abstract]
Valuation allowances relating to deferred tax assets arising from UK other net operating losses	$ 51

- Definition

The tax effect as of the balance sheet date of the amount of future tax deductions arising from capital losses in excess of statutory limitations in historical filings, and which can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization.

+ References+ Details

- Definition

+ References+ Details

- Definition

The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 43

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 17

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 48

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 30

-Paragraph 5

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=6907311&loc=d3e30536-109315

+ Details

Discontinued operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Amount of revenue and pre tax income reported in discontinued operation
Revenues	$ 8	$ 7	$ 19
Income before income taxes	(1)		6
Income taxes			(2)
Income from discontinued operations	(1)		4
Gain on disposal of discontinued operations, net of tax	2
Discontinued operations, net of tax	$ 1		$ 4

- Definition

+ References+ Details

- Definition

Pretax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

+ References+ Details

- Definition

After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

+ References+ Details

- Definition

Income tax expense or benefit attributable to Income or Loss from discontinued operations during the phase-out period.

+ References+ Details

- Definition

This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items before deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 43

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 47

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 29

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 15

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 13

-Article 7

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.12)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.14)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

+ Details

Discontinued Operations (Detail 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Assets:
Cash and cash equivalents	$ 1
Fiduciary assets	17
Goodwill	3
Other intangible assets, net	6
Other current assets	2
Total assets	29
Fiduciary liabilities	(17)
Other current liabilities	(1)
Total liabilities	(18)
Net assets of discontinued operations	$ 11

Discontinued Operations (Detail Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Discontinued Operations (Additional Textual) [Abstract]
Gain net of tax	$ 2
Discontinued operations (textual) [abstract]
Gross proceed	15
Identifiable intangible assets	11
Goodwill	9
Costs and income taxes	2
Global Special Risks [Member]
Discontinued Operations (Additional Textual) [Abstract]
Gain net of tax	$ 2

- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References+ Details

- Definition

+ References+ Details

Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Basic and diluted earnings per share
Net income attributable to Willis Group Holdings	$ 25	$ 60	$ 85	$ 34	$ 98	$ 64	$ 89	$ 204	$ 204	$ 455	$ 438
Basic average number of shares outstanding									173	170	168
Dilutive effect of potentially issuable shares									3	1	1
Diluted average number of shares outstanding									176	171	169
Basic earnings per share:
Continuing operations	$ 0.14	$ 0.35	$ 0.49	$ 0.20	$ 0.57	$ 0.38	$ 0.52	$ 1.21	$ 1.17	$ 2.68	$ 2.58
Discontinued operations									$ 0.01		$ 0.03
Net income attributable to Willis Group Holdings shareholders, Basic									$ 1.18	$ 2.68	$ 2.61
Dilutive effect of potentially issuable shares									$ (0.02)	$ (0.02)	$ (0.02)
Diluted Earnings per share:
Continuing operations	$ 0.14	$ 0.34	$ 0.48	$ 0.20	$ 0.57	$ 0.37	$ 0.51	$ 1.21	$ 1.15	$ 2.66	$ 2.57
Discontinued operations									$ 0.01		$ 0.02
Net income attributable to Willis Group Holdings shareholders, Diluted									$ 1.16	$ 2.66	$ 2.59

Earnings Per Share (Details Textual) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Earnings Per Share (Textual) [Abstract]
Outstanding time-based stock options	9.2	11.5	13.4
Outstanding performance-based stock options	7.3	9.4	8.9
Restricted stock units outstanding	1.2	1.8	2.2
Antidilutive stock options	4.1	13.9	16.1

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 13, 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 171

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

-URI http://asc.fasb.org/extlink&oid=6508534

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Antidilution

-URI http://asc.fasb.org/extlink&oid=6505113

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Fiduciary Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Fiduciary Assets (Textual) [Abstract]
Time deposits constituting Fiduciary funds	$ 1,688	$ 1,764

- Definition

Any certificate of deposit or savings account held by a bank or other financial institution for a short-term specified period of time. Because of their short-term, time deposits are considered highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References+ Details

Fixed Assets, Net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Analysis of fixed asset activity
Cost : Beginning Balance	$ 753	$ 708
Additions	111	106
Disposals	(65)	(49)
Foreign exchange	(7)	(12)
Cost : Ending Balance	792	753
Depreciation: Beginning Balance	(372)	(356)
Depreciation expense provided	(76)	(63)
Disposals	58	41
Foreign exchange	4	6
Depreciation: Ending Balance	(386)	(372)
Net book value	406	381
Land and buildings [Member]
Analysis of fixed asset activity
Cost : Beginning Balance	73	51
Additions		24
Foreign exchange		(2)
Cost : Ending Balance	73	73
Depreciation: Beginning Balance	(25)	(24)
Depreciation expense provided	(3)	(2)
Foreign exchange		1
Depreciation: Ending Balance	(28)	(25)
Net book value	45	48
Leasehold Improvements [Member]
Analysis of fixed asset activity
Cost : Beginning Balance	192	184
Additions	24	13
Disposals	(13)	(4)
Foreign exchange	7	(1)
Cost : Ending Balance	210	192
Depreciation: Beginning Balance	(56)	(46)
Depreciation expense provided	(15)	(12)
Disposals	13	2
Foreign exchange	(3)
Depreciation: Ending Balance	(61)	(56)
Net book value	149	136
Furniture and equipment [Member]
Analysis of fixed asset activity
Cost : Beginning Balance	488	473
Additions	87	69
Disposals	(52)	(45)
Foreign exchange	(14)	(9)
Cost : Ending Balance	509	488
Depreciation: Beginning Balance	(291)	(286)
Depreciation expense provided	(58)	(49)
Disposals	45	39
Foreign exchange	7	5
Depreciation: Ending Balance	(297)	(291)
Net book value	$ 212	$ 197

Fixed Assets, Net (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Fixed Assets (Textual) [Abstract]
Cost	$ 792	$ 753	$ 708
Accumulated depreciation	386	372	356
Depreciation expense	74	63	64
Assets Held under Capital Leases [Member]
Fixed Assets (Textual) [Abstract]
Cost	23	23	0
Accumulated depreciation	2	1	0
Depreciation expense	1	1	0
Depreciation Charge Included in Salaries and Benefits [Member]
Fixed Assets (Textual) [Abstract]
Depreciation expense	$ 2	$ 0

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References+ Details

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References+ Details

- Definition

Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ References+ Details

Goodwill (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Changes in the carrying amount of goodwill by operating segment
Goodwill, Beginning Balance	$ 3,294	$ 3,277
Purchase price allocation adjustments	2	6
Goodwill acquired during the period	10
Goodwill disposed of during the year	(3)
Other movements	1	(3)
Foreign exchange	(9)	14
Goodwill, Ending Balance	3,295	3,294	3,277
Goodwill (Additional Textual) [Abstract]
Impairment charge
Tax benefit arising on exercise of fully vested stock options	(1)	3
Global [Member]
Changes in the carrying amount of goodwill by operating segment
Goodwill, Beginning Balance	1,063	1,065
Other movements	60
Foreign exchange	(1)	(2)
Goodwill, Ending Balance	1,122	1,063
Goodwill (Textual) [Abstract]
Goodwill reallocation	60
North America [Member]
Changes in the carrying amount of goodwill by operating segment
Goodwill, Beginning Balance	1,783	1,780
Purchase price allocation adjustments		6
Goodwill disposed of during the year	(3)
Other movements	2	(3)
Goodwill, Ending Balance	1,782	1,783
Goodwill (Textual) [Abstract]
Goodwill reallocation	1
International [Member]
Changes in the carrying amount of goodwill by operating segment
Goodwill, Beginning Balance	448	432
Purchase price allocation adjustments	2
Goodwill acquired during the period	10
Other movements	(61)
Foreign exchange	(8)	16
Goodwill, Ending Balance	$ 391	$ 448

Other Intangible Assets, Net (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Summary of major classes of amortizable intangible assets
Gross carrying amount	$ 745	$ 755
Accumulated amortization	(325)	(263)
Net carrying amount	420	492
Total Customer and Marketing Related [Member]
Summary of major classes of amortizable intangible assets
Gross carrying amount	741	751
Accumulated amortization	(322)	(260)
Net carrying amount	419	491
Client Relationships [Member]
Summary of major classes of amortizable intangible assets
Gross carrying amount	686	695
Accumulated amortization	(269)	(207)
Net carrying amount	417	488
Client Lists [Member]
Summary of major classes of amortizable intangible assets
Gross carrying amount	8	9
Accumulated amortization	(7)	(7)
Net carrying amount	1	2
Non-compete Agreements [Member]
Summary of major classes of amortizable intangible assets
Gross carrying amount	36	36
Accumulated amortization	(36)	(36)
Net carrying amount	0	0
Trade Names [Member]
Summary of major classes of amortizable intangible assets
Gross carrying amount	11	11
Accumulated amortization	(10)	(10)
Net carrying amount	1	1
Contract Based, Technology and Other [Member]
Summary of major classes of amortizable intangible assets
Gross carrying amount	4	4
Accumulated amortization	(3)	(3)
Net carrying amount	$ 1	$ 1

Other Intangible Assets, Net (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Estimated aggregate amortization of intangible assets for each of the next five years
2012	$ 61
2013	53
2014	45
2015	38
2016	33
Thereafter	190
Total	420
Other Intangible Assets, Net (Textual) [Abstract]
Aggregate amortization of intangible assets	$ 68	$ 82	$ 100

Investments in Associates (Details)	Dec. 17, 2009	Dec. 31, 1997	Dec. 31, 2011 Al-Futtaim Willis Co LLC [Member]	Dec. 31, 2010 Al-Futtaim Willis Co LLC [Member]	Dec. 31, 2011 GS & CIE Group [Member]	Dec. 31, 2010 GS & CIE Group [Member]
The Company's approximate interest in the outstanding stock of the more significant associates
Percentage owned by Group	30.00%	33.00%	49.00%	49.00%	30.00%	31.00%

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References+ Details

Investments in Associates (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Condensed statements of operations data:
Total revenues	$ 527	$ 510	$ 534
Income before income taxes	5	61	96
Net income	(2)	43	64
Condensed balance sheets data:
Total assets	1,882	2,043	2,204
Total liabilities	(1,736)	(1,825)	(1,767)
Stockholders' equity	$ (146)	$ (218)	$ (437)

- Definition

The amount of assets reported by an equity method investment of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph bb

-Article 1

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph w

-Article 1

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 4

-Section 08

-Paragraph g

-Subparagraph 1, 2

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 28

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(g))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33912-111571

+ Details

- Definition

The amount of equity (capital), including the noncontrolling interest (if any), reported by an equity method investment of the entity.

+ References+ Details

- Definition

The amount of liabilities reported by an equity method investment of the entity.

+ References

+ Details

- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

+ References

+ Details

Investments In Associates (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 17, 2009	Dec. 31, 1997
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage owned by Group				30.00%	33.00%
Goodwill	$ 3,295	$ 3,294	$ 3,277
Total proceeds		4	315
Investments in Associates (Textual) [Abstract]
Resultant equity interest percentage as a result of a series of incremental investments			49.00%
Voting rights of Shareholder on its board				33.00%
Potential shareholding if put option is exercised			90.00%
Potential shareholding if call option is exercised			100.00%
Amount of gain recognized			10
Reduction of interest in Gras Savoye			49 percent to 31 percent
Gain on disposal of discontinued operations, net of tax	4	(2)	13
Interest bearing vendor loans By Gras Savoye	43	44
Convertible Bonds Issued By Gras Savoye	85	78
Dividends received from associates	4	5	12
Gras Savoye [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage owned by Group	30.00%	31.00%	49.00%	31.00%
Goodwill	82	88
Total proceeds			$ 281
Investments in Associates (Textual) [Abstract]
Reduction of interest in Gras Savoye	49 percent to 31 percent

Other Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Other current assets
Unamortized cash retention awards	$ 120	$ 125
Prepayments and accrued income	45	73
Income taxes receivable	30	69
Derivatives	14	17
Debt issuance costs	3	8
Other Receivables	47	48
Total other current assets	259	340
Other non-current assets
Unamortized cash retention awards	76	48
Deferred compensation plan assets	89	114
Derivatives	38	30
Debt issuance costs	15	27
Other receivables	65	14
Total other non-current assets	283	233
Total other assets	$ 542	$ 573

Other Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Other current liabilities
Accounts payable	$ 59	$ 39
Accrued dividends payable	46	46
Other taxes payable	45	41
Accrued interest payable	37	21
Derivatives	0	0
Other payables	88	113
Total other current liabilities	282	266
Other non-current liabilities
Incentives from lessors	165	150
Deferred compensation plan liability	106	120
Capital lease obligation	26	23
Other taxes payable	5	0
Derivatives	4	6
Other Payables	61	54
Total other non-current liabilities	363	347
Total other liabilities	$ 645	$ 613

Allowance for Doubtful Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Provision for Liabilities
Beginning balance	$ 12	$ 16	$ 20
Additions/(releases) charged to costs and expenses	4		(1)
Deductions/Other movements	(3)	(4)	(4)
Foreign exchange differences			1
Ending balance	$ 13	$ 12	$ 16

- Definition

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

+ References+ Details

Pension Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Change in plan assets
Employer contributions	$ 103
Components on the Consolidated Balance Sheets
Pension benefits asset	145	182
Liability for pension benefits	(270)	(167)
UK Pension Benefit [Member]
Change in benefit obligation
Benefit obligation, beginning of year	1,906	1,811
Service cost	36	37	28
Interest cost	106	100	96
Employee contributions	2	2
Actuarial loss	272	84
Benefits paid	(72)	(72)
Foreign currency changes	(23)	(56)
Plan amendments	(10)
Benefit obligations, end of year	2,217	1,906	1,811
Change in plan assets
Fair value of plan assets, beginning of year	2,085	1,880
Actual return on plan assets	269	245
Employee contributions	2	2
Employer contributions	92	88
Benefits paid	(72)	(72)
Foreign currency changes	(23)	(58)
Fair value of plan assets, end of year	2,353	2,085	1,880
Funded status at end of year	136	179
Components on the Consolidated Balance Sheets
Pension benefits asset	136	179
Liability for pension benefits	0	0
US Pension Benefits [Member]
Change in benefit obligation
Benefit obligation, beginning of year	756	686
Service cost			7
Interest cost	41	40	40
Actuarial loss	127	57
Benefits paid	(29)	(27)
Benefit obligations, end of year	895	756	686
Change in plan assets
Fair value of plan assets, beginning of year	602	529
Actual return on plan assets	34	70
Employer contributions	30	30
Benefits paid	(29)	(27)
Fair value of plan assets, end of year	637	602	529
Funded status at end of year	(258)	(154)
Components on the Consolidated Balance Sheets
Pension benefits asset	0	0
Liability for pension benefits	$ (258)	$ (154)

Pension Plans (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
UK Pension Benefit [Member]
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss	$ 698	$ 571
Prior service gain	(35)	(30)
US Pension Benefits [Member]
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss	303	169
Prior service gain	$ 0	$ 0

- Definition

The pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

+ References+ Details

- Definition

Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph i

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 158

-Paragraph 7

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 106

-Paragraph 518

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 264

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Prior Service Cost

-URI http://asc.fasb.org/extlink&oid=6521920

-Topic 715

-SubTopic 60

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Prior Service Cost

-URI http://asc.fasb.org/extlink&oid=6521884

-Topic 715

-SubTopic 30

+ Details

Pension Plans (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of net periodic benefit cost
Curtailment gain (loss)				$ (12)
Net periodic benefit cost (income)		11	35	42
UK Pension Benefit [Member]
Components of net periodic benefit cost
Service cost		36	37	28
Interest cost		106	100	96
Expected return on plan assets		(161)	(141)	(127)
Amortization of unrecognized prior service gain		(5)	(5)	(5)
Amortization of unrecognized actuarial loss	40	30	37	33
Net periodic benefit cost (income)		6	28	25
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Net actuarial (gain) loss		164	(20)	102
Amortization of unrecognized actuarial loss		(30)	(37)	(33)
Prior service gain		(10)
Amortization of unrecognized prior service gain		5	5	5
Total recognized in other comprehensive income (loss)		129	(52)	74
Total recognized in net periodic benefit cost and other comprehensive (loss) income		135	(24)	99
US Pension Benefits [Member]
Components of net periodic benefit cost
Service cost				7
Interest cost		41	40	40
Expected return on plan assets		(44)	(42)	(36)
Amortization of unrecognized actuarial loss	8	3	3	8
Curtailment gain (loss)				(12)
Net periodic benefit cost (income)			1	7
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Net actuarial (gain) loss		137	29	(31)
Amortization of unrecognized actuarial loss		(3)	(3)	(12)
Curtailment gain				12
Total recognized in other comprehensive income (loss)		134	26	(31)
Total recognized in net periodic benefit cost and other comprehensive (loss) income		$ 134	$ 27	$ (24)

Pension Plans (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
UK Pension Benefit [Member]
Estimated net loss and prior service cost to be amortized from accumulated other comprehensive loss into net periodic benefit cost
Estimated net loss	$ 40	$ 30	$ 37	$ 33
Prior service gain	6
US Pension Benefits [Member]
Estimated net loss and prior service cost to be amortized from accumulated other comprehensive loss into net periodic benefit cost
Estimated net loss	$ 8	$ 3	$ 3	$ 8

- Definition

The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

+ References+ Details

- Definition

The amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

+ References+ Details

Pension Plans (Details 4)	12 Months Ended
Pension Plans (Details 4)	Dec. 31, 2011	Dec. 31, 2010
UK Pension Benefit [Member]
Weighted-average assumptions to determine benefit obligations:
Discount rate	4.80%	5.50%
Rate of compensation increase	2.10%	2.60%
Weighted-average assumptions to determine net periodic benefit cost:
Discount rate	5.50%	5.80%
Expected return on plan assets	7.50%	7.80%
Rate of compensation increase	2.60%	2.50%
US Pension Benefits [Member]
Weighted-average assumptions to determine benefit obligations:
Discount rate	4.60%	5.60%
Weighted-average assumptions to determine net periodic benefit cost:
Discount rate	5.60%	6.10%
Expected return on plan assets	7.50%	8.00%

- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References+ Details

Pension Plans (Details 5)	Dec. 31, 2011	Dec. 31, 2010
UK Pension Benefit [Member]
Asset Category
Equity securities	42.00%	51.00%
Debt securities	35.00%	24.00%
Hedge funds	18.00%	20.00%
Real estate	4.00%	4.00%
Cash	1.00%	1.00%
Total	100.00%	100.00%
US Pension Benefits [Member]
Asset Category
Equity securities	43.00%	54.00%
Debt securities	56.00%	45.00%
Hedge funds	0.00%	0.00%
Real estate	0.00%	0.00%
Cash	1.00%	1.00%
Total	100.00%	100.00%

Pension Plans (Details 6) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
UK Pension Plan [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	$ 2,353	$ 2,085	$ 1,880
UK Pension Plan [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	2,353	2,085
UK Pension Plan [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	1,429	1,240
UK Pension Plan [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	422	345
UK Pension Plan [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	502	500
UK Pension Plan [Member] \| US Equities [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	515	511
UK Pension Plan [Member] \| US Equities [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	422	421
UK Pension Plan [Member] \| US Equities [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	93	90
UK Pension Plan [Member] \| US Equities [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| UK Equities [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	319	400
UK Pension Plan [Member] \| UK Equities [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	278	303
UK Pension Plan [Member] \| UK Equities [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	41	97
UK Pension Plan [Member] \| UK Equities [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Non US equities [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	152	149
UK Pension Plan [Member] \| Non US equities [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	15	0
UK Pension Plan [Member] \| Non US equities [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	137	149
UK Pension Plan [Member] \| Non US equities [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| US Government Bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	49
UK Pension Plan [Member] \| US Government Bonds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	49
UK Pension Plan [Member] \| US Government Bonds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| US Government Bonds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Other Government bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	1	17
UK Pension Plan [Member] \| Other Government bonds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	1	17
UK Pension Plan [Member] \| Other Government bonds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Other Government bonds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| UK Government bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	599	348
UK Pension Plan [Member] \| UK Government bonds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	599	348
UK Pension Plan [Member] \| UK Government bonds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| UK Government bonds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| UK corporate bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	63	57
UK Pension Plan [Member] \| UK corporate bonds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	63	57
UK Pension Plan [Member] \| UK corporate bonds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| UK corporate bonds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Other corporate bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	23	14
UK Pension Plan [Member] \| Other corporate bonds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	23	14
UK Pension Plan [Member] \| Other corporate bonds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Other corporate bonds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Derivatives [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	158	22
UK Pension Plan [Member] \| Derivatives [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Derivatives [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	158	22
UK Pension Plan [Member] \| Derivatives [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Real estate [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	86	83
UK Pension Plan [Member] \| Real estate [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Real estate [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Real estate [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	86	83
UK Pension Plan [Member] \| Cash [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	28	31
UK Pension Plan [Member] \| Cash [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	28	31
UK Pension Plan [Member] \| Cash [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Cash [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Hedge funds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	414	415
UK Pension Plan [Member] \| Hedge funds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Hedge funds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Hedge funds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	414	415
UK Pension Plan [Member] \| Other [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	(5)	(11)
UK Pension Plan [Member] \| Other [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Pension Plan [Member] \| Other [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	(7)	(13)
UK Pension Plan [Member] \| Other [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	2	2
US Pension Plan [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	637	602	529
US Pension Plan [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	637	602
US Pension Plan [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	326	598
US Pension Plan [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	311	4
US Pension Plan [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| US Equities [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	172	201
US Pension Plan [Member] \| US Equities [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	172	201
US Pension Plan [Member] \| US Equities [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| US Equities [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| Non US equities [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	106	127
US Pension Plan [Member] \| Non US equities [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	106	127
US Pension Plan [Member] \| Non US equities [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| Non US equities [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| US Government Bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	55	112
US Pension Plan [Member] \| US Government Bonds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	112
US Pension Plan [Member] \| US Government Bonds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	55	0
US Pension Plan [Member] \| US Government Bonds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| US Corporate Bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	252	111
US Pension Plan [Member] \| US Corporate Bonds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	111
US Pension Plan [Member] \| US Corporate Bonds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	252	0
US Pension Plan [Member] \| US Corporate Bonds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| Non US Government bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	48	47
US Pension Plan [Member] \| Non US Government bonds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	48	47
US Pension Plan [Member] \| Non US Government bonds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| Non US Government bonds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| Cash [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	4	5
US Pension Plan [Member] \| Cash [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| Cash [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	4	5
US Pension Plan [Member] \| Cash [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| Other [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	(1)
US Pension Plan [Member] \| Other [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Pension Plan [Member] \| Other [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	(1)
US Pension Plan [Member] \| Other [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	$ 0	$ 0

- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References+ Details

Pension Plans (Details 7) (UK Pension Plan [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Changes in the UK pension plan's Level 3 assets
Benefit obligation, beginning of year	$ 1,906	$ 1,811
Foreign currency changes	(23)	(56)
Benefit obligations, end of year	2,217	1,906
Level 3
Changes in the UK pension plan's Level 3 assets
Benefit obligation, beginning of year	500	328
Purchases, sales, issuances and settlements, net	2	156
Unrealized gains relating to instruments held at end of year	5	22
Foreign currency changes	(5)	(6)
Benefit obligations, end of year	$ 502	$ 500

- Definition

1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 6

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph E1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Projected Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6522206

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Postretirement Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503904

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

+ Details

Pension Plans (Details 8) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
UK Pension Plan [Member]
Expected future benefit payments
2012	$ 73
2013	76
2014	78
2015	81
2016	82
2017-2021	450
US Pension Plan [Member]
Expected future benefit payments
2012	33
2013	36
2014	39
2015	42
2016	44
2017-2021	$ 256

Pension Plans (Details 9) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Change in plan assets
Employer contributions	$ 103
Components on the Consolidated Balance Sheets
Pension benefits asset	145	182
Liability for pension benefits	(270)	(167)
International Pension Benefits [Member]
Change in benefit obligation
Benefit obligation, beginning of year	135	150
Service cost	4	4	6
Interest cost	7	7	8
Actuarial (gain) loss	(4)	(4)
Benefits paid	(6)	(15)
Plan amendments	(1)	1
Foreign currency changes	(4)	(8)
Benefit obligations, end of year	131	135	150
Change in plan assets
Fair value of plan assets, beginning of year	125	120
Actual return on plan assets	1	15
Employer contributions	13	12
Benefits paid	(6)	(15)
Foreign currency changes	(5)	(7)
Fair value of plan assets, end of year	128	125	120
Funded status at end of year	(3)	(10)
Components on the Consolidated Balance Sheets
Pension benefits asset	9	3
Liability for pension benefits	$ (12)	$ (13)

Pension Plans (Details 10) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of net periodic benefit cost
Curtailment (gain) loss			$ 12
Net periodic benefit cost (income)	11	35	42
International Pension Benefits [Member]
Components of net periodic benefit cost
Service cost	4	4	6
Interest cost	7	7	8
Expected return on plan assets	(6)	(6)	(6)
Amortization of unrecognized actuarial loss	1		2
Curtailment (gain) loss	(1)	1
Other
Net periodic benefit cost (income)	5	6	10
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Amortization of unrecognized actuarial loss	(1)		(2)
Net actuarial (gain) loss	2	(13)	(2)
Total recognized in other comprehensive income (loss)	1	(13)	(4)
Total recognized in net periodic benefit cost and other comprehensive (loss) income	$ 6	$ (7)	$ 6

Pension Plans (Details 11) (International Pension Benefits [Member])	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Minimum [Member]
Weighted-average assumptions to determine benefit obligations:
Discount rate	3.30%	4.00%
Rate of compensation increase	2.50%	2.50%
Weighted-average assumptions to determine net periodic benefit cost:
Discount rate	4.00%	5.00%
Expected return on plan assets	4.80%	4.60%
Rate of compensation increase	2.50%	2.00%
Maximum [Member]
Weighted-average assumptions to determine benefit obligations:
Discount rate	5.30%	5.10%
Rate of compensation increase	3.00%	3.00%
Weighted-average assumptions to determine net periodic benefit cost:
Discount rate	5.10%	5.30%
Expected return on plan assets	5.73%	6.31%
Rate of compensation increase	3.00%	3.00%

- Definition

+ References+ Details

Pension Plans (Details 12) (International Pension Benefits [Member])	Dec. 31, 2011	Dec. 31, 2010
International Pension Benefits [Member]
Asset Category
Equity securities	35.00%	44.00%
Debt securities	58.00%	42.00%
Real estate	4.00%	4.00%
Other	3.00%	10.00%
Total	100.00%	100.00%

Pension Plans (Details 13) (International Pension Benefits [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	$ 128	$ 125	$ 120
Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	128	125
Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	94	92
Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	23	23
Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	11	10
US Equities [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	20	21
US Equities [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	20	21
US Equities [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
US Equities [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Equities [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	4	4
UK Equities [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	4	4
UK Equities [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
UK Equities [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Overseas equities [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	19	20
Overseas equities [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	18	20
Overseas equities [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Overseas equities [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	1	0
Unit linked funds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	7
Unit linked funds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	7
Unit linked funds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Unit linked funds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Other Government bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	49	31
Other Government bonds [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	48	29
Other Government bonds [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	1	2
Other Government bonds [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Real estate [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	5	5
Real estate [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Real estate [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Real estate [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	5	5
Cash [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	4	11
Cash [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	4	11
Cash [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Cash [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Derivatives instruments [Member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	22	21
Derivatives instruments [Member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Derivatives instruments [Member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	22	21
Derivatives instruments [Member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Other Investments [member] \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	5	5
Other Investments [member] \| Level 1 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Other Investments [member] \| Level 2 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	0	0
Other Investments [member] \| Level 3 \| Fair Value, Measurements, Recurring [Member]
Schedule of defined benefit pension plan assets fair value measured on a recurring basis
Pension benefits asset	$ 5	$ 5

- Definition

+ References+ Details

Pension Plans (Details 14) (International Pension Benefits [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2011
International Pension Benefits [Member]
Expected future benefit payments
2012	$ 3
2013	4
2014	4
2015	4
2016	4
2017-2021	$ 23

Pension Plans (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Investment	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure (Textual) [Abstract]
Liability for pension benefits	$ 270	$ 167
Pension benefits asset	145	182
Expected contribution to defined pension plan for the full year 2012	142
Estimated net loss for the international defined benefit plans amortized from accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year	3
Pension Plans (Additional Textual) [Abstract]
Curtailment gain			12
US Pension Benefits [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Liability for pension benefits	258	154
Accumulated benefit obligations	895	756	686
Pension benefits asset	0	0
Amount included in US pension benefits due to curtailment			4
Expected return on plan assets	7.50%	8.00%
Number of funds invested in assets	11
Expected contribution to defined pension plan for the full year 2012	40
Accumulated other comprehensive loss net actuarial	303	169
Pension Plans (Additional Textual) [Abstract]
Curtailment gain			12
US Pension Benefits [Member] \| US and foreign equities [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Expected return on plan assets	9.25%
Defined benefit plan broad target allocation percentage of assets	0.55
US Pension Benefits [Member] \| Debt Securities [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Expected return on plan assets	5.25%
Defined benefit plan broad target allocation percentage of assets	0.45
UK Pension Benefit [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Liability for pension benefits	0	0
Accumulated benefit obligations	2,217	1,906	1,811
Pension benefits asset	136	179
Expected return on plan assets	7.50%	7.80%
Number of portfolios in which plan's assets divided	12
Number of managers managing plan's assets portfolios	11
Expected contribution to defined pension plan for the full year 2012	91
Expects to contribute in respect of salary sacrifice	12
Accumulated other comprehensive loss net actuarial	698	571
UK Pension Benefit [Member] \| UK and foreign equities [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Expected return on plan assets	8.80%
Defined benefit plan broad target allocation percentage of assets	0.51
UK Pension Benefit [Member] \| Real estate [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Expected return on plan assets	6.48%
Defined benefit plan broad target allocation percentage of assets	0.05
UK Pension Benefit [Member] \| Debt Securities [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Expected return on plan assets	4.52%
Defined benefit plan broad target allocation percentage of assets	0.22
UK Pension Benefit [Member] \| Hedge funds [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Defined benefit plan broad target allocation percentage of assets	0.22
International Pension Benefits [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Liability for pension benefits	12	13
Accumulated benefit obligations	131	135	150
Pension benefits asset	9	3
Expected contribution to defined pension plan for the full year 2012	12
Net Pension Benefit Liability	3	10
Accumulated other comprehensive loss net actuarial	10	10
Defined Benefit Plan, Accumulated Benefit Obligation	128	131
Pension Plans (Additional Textual) [Abstract]
Curtailment gain	(1)	1
401(K) Plan [Member]
Defined Benefit Plan Disclosure (Textual) [Abstract]
Percentage matching contributions other than for former HRH employees			75.00%
Matching contributions under 401 (k) plan	$ 10	$ 0	$ 5

Debt (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Short-term debt and current portion of long-term debt
Short-term debt and current portion of long-term debt	$ 15	$ 110
5-year term loan facility expires 2016 [Member]
Short-term debt and current portion of long-term debt
Current portion of 5-year term loan facility	11	0
5-year term loan facility repaid 2011 [Member]
Short-term debt and current portion of long-term debt
Current portion of 5-year term loan facility	0	110
6.000% loan notes due 2012 [Member]
Short-term debt and current portion of long-term debt
6.000% loan notes due 2012	$ 4	$ 0

Debt (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended								12 Months Ended					12 Months Ended					12 Months Ended						12 Months Ended										12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Revolving $300 million credit facility [Member]	Dec. 31, 2010 Revolving $300 million credit facility [Member]	Dec. 31, 2009 Revolving $300 million credit facility [Member]	Dec. 31, 2011 5-year term loan facility expires 2016 [Member]	Dec. 31, 2010 5-year term loan facility expires 2016 [Member]	Dec. 31, 2011 5-year term loan facility repaid 2011 [Member]	Dec. 31, 2010 5-year term loan facility repaid 2011 [Member]	Dec. 31, 2009 5-year term loan facility repaid 2011 [Member]	Dec. 31, 2011 6.000% loan notes due 2012 [Member]	Dec. 31, 2010 6.000% loan notes due 2012 [Member]	Dec. 31, 2011 5.625% senior notes due 2015 [Member]	Dec. 31, 2010 5.625% senior notes due 2015 [Member]	Dec. 31, 2009 5.625% senior notes due 2015 [Member]	Dec. 31, 2011 Fair Value adjustment on 5.625% senior notes due 2015 [Member]	Dec. 31, 2010 Fair Value adjustment on 5.625% senior notes due 2015 [Member]	Dec. 31, 2011 12.875% senior notes due 2016 [Member]	Dec. 31, 2010 12.875% senior notes due 2016 [Member]	Dec. 31, 2009 12.875% senior notes due 2016 [Member]	Dec. 31, 2011 4.125% senior notes due 2016 [Member]	Mar. 31, 2011 4.125% senior notes due 2016 [Member]	Dec. 31, 2010 4.125% senior notes due 2016 [Member]	Dec. 31, 2011 6.200% senior notes due 2017 [Member]	Dec. 31, 2010 6.200% senior notes due 2017 [Member]	Dec. 31, 2009 6.200% senior notes due 2017 [Member]	Dec. 31, 2011 7.000% senior notes due 2019 [Member]	Dec. 31, 2010 7.000% senior notes due 2019 [Member]	Dec. 31, 2009 7.000% senior notes due 2019 [Member]	Dec. 31, 2010 5.125% senior notes due 2010 [Member]	Dec. 31, 2009 5.125% senior notes due 2010 [Member]	Dec. 31, 2011 5.750% senior notes due 2021 [Member]	Dec. 31, 2010 5.750% senior notes due 2021 [Member]	Dec. 31, 2010 Interim credit facility [Member]	Dec. 31, 2009 Interim credit facility [Member]	Dec. 31, 2011 Other [Member]	Dec. 31, 2010 Other [Member]	Dec. 31, 2009 Other [Member]
Long - term debt
Long term debt							$ 289	$ 0	$ 0	$ 301
Revolving $300 million revolving credit facility				0	90
Loan notes due												0	4
Long-term debt														350	350		20	12	0	500		299	300	0	600	600		300	300				496	0
Long-term debt, Total	2,354	2,157
Analysis of interest expense
Total interest expense	$ 156	$ 166	$ 174	$ 4	$ 3	$ 3			$ 14	$ 17	$ 26			$ 12	$ 14	$ 20			$ 15	$ 67	$ 55	$ 10			$ 38	$ 38	$ 38	$ 21	$ 21	$ 5	$ 3	$ 16	$ 23		$ 0	$ 7	$ 19	$ 3	$ 4

- Definition

The cost of borrowed funds accounted for as interest that was charged against earnings during the period.

+ References+ Details

Debt (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended						12 Months Ended					12 Months Ended			1 Months Ended	3 Months Ended																12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Revolving $500 million credit facility [Member]	Dec. 31, 2010 Revolving $500 million credit facility [Member]	Aug. 09, 2010 Revolving $200 million credit facility [Member]	Dec. 31, 2011 Revolving $20 million credit facility [Member]	Jun. 22, 2010 Revolving $20 million credit facility [Member]	Dec. 31, 2011 Revolving $0 million credit facility [Member]	Dec. 31, 2010 Revolving $0 million credit facility [Member]	Dec. 31, 2010 Other Lines Credit Facility [Member]	Dec. 31, 2011 5-year term loan facility expires 2016 [Member]	Dec. 31, 2011 5.625% senior notes due 2015 [Member]	Dec. 31, 2010 5.625% senior notes due 2015 [Member]	Mar. 31, 2011 12.875% senior notes due 2016 [Member]	Mar. 31, 2011 12.875% senior notes due 2016 [Member]	Dec. 31, 2011 12.875% senior notes due 2016 [Member]	Dec. 31, 2010 12.875% senior notes due 2016 [Member]	Dec. 31, 2011 4.125% senior notes due 2016 [Member]	Mar. 31, 2011 4.125% senior notes due 2016 [Member]	Dec. 31, 2010 4.125% senior notes due 2016 [Member]	Dec. 31, 2011 6.200% senior notes due 2017 [Member]	Dec. 31, 2010 6.200% senior notes due 2017 [Member]	Dec. 31, 2011 7.000% senior notes due 2019 [Member]	Dec. 31, 2010 7.000% senior notes due 2019 [Member]	Dec. 31, 2011 5.750% senior notes due 2021 [Member]	Mar. 31, 2011 5.750% senior notes due 2021 [Member]	Dec. 31, 2011 6.000% loan notes due 2012 [Member]	Dec. 31, 2011 5.125% senior notes due 2010 [Member]	Dec. 31, 2011 New five year term loan facility [Member]	Dec. 31, 2011 Five year revolving credit facility [Member]	Dec. 31, 2011 Five Year Term Loan Facility [Member]
Debt (Textual) [Abstract]
Debt 5-year term loan																														$ 300		$ 700
Balance of 5-year term loan facility																																328
Long-term debt	2,354	2,157
Repayments of debt	911	209	1,089																													83
Fair value hedges														350
Revolving credit facility	500			500		200		20	3		2																				500
Revolving credit facility				0	90				0	0
Interest of Loan facility Description				LIBOR plus 1.50%”			LIBOR plus 1.700% until 2012 and LIBOR plus 1.850% thereafter					LIBOR plus 1.50%”
Facility expiration date				Dec. 16, 2016			Dec. 22, 2012
Final repayment for credit facility																																225
Excess of interest rate over LIBOR Year 2016	1.50%
Excess of interest rate over LIBOR Year One	1.70%
Excess of interest rate over LIBOR Thereafter	1.85%
Percentage of loan notes													5.625%				12.875%		4.125%			6.20%		7.00%		5.75%		6.00%	5.125%
Effective interest rate																				4.24%							5.871%
Long-term debt													350	350			0	500	299	300	0	600	600	300	300		500
Redemption of senior notes																500
Write off of unamortized debt issuance costs associated with debt repurchase	(23)			10												13
Make whole on repurchase and redemption of senior notes	(158)														158
Additional Debt (Textual) [Abstract]
Notional amount of interest rate swaps		350
Maturity date of interest rate swaps	Jul. 15, 2015	Jul. 15, 2015
Line of Credit Facility Revolving Credit Amount Withdrawn	$ 0

Provisions for Liabilities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Analysis of movements on provisions for liabilities
Beginning Balance	$ 179	$ 226
Net provisions made during the year	56	12
Utilized in the year	(38)	(57)
Foreign currency translation adjustment	(1)	(2)
Ending Balance	196	179
Provisions for Liabilities (Textual) [Abstract]
Insurance recoveries recognized	6	15
Provision for vacant property	20	14
Claims, lawsuits and other proceedings [Member]
Analysis of movements on provisions for liabilities
Beginning Balance	145	178
Net provisions made during the year	45	19
Utilized in the year	(31)	(50)
Foreign currency translation adjustment	(1)	(2)
Ending Balance	158	145
Other provisions [Member]
Analysis of movements on provisions for liabilities
Beginning Balance	34	48
Net provisions made during the year	11	(7)
Utilized in the year	(7)	(7)
Ending Balance	$ 38	$ 34

- Definition

Carrying amount of estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid after one year or beyond the normal operating cycle, if longer.

+ References+ Details

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Contractual obligations
Total	$ 5,009
Payments due by 2012	450
Payments due by 2013-2014	680
Payments due by 2015-2016	1,443
Payments due after 2016	2,436
Revolving $500 million credit facility [Member]
Contractual obligations
Total	6
Payments due by 2012	1
Payments due by 2013-2014	3
Payments due by 2015-2016	2
Payments due after 2016	0
5-year term loan facility expires 2016 [Member]
Contractual obligations
Total	300
Payments due by 2012	11
Payments due by 2013-2014	30
Payments due by 2015-2016	259
Payments due after 2016	0
Interest on term loan [Member]
Contractual obligations
Total	28
Payments due by 2012	6
Payments due by 2013-2014	12
Payments due by 2015-2016	10
Payments due after 2016	0
6.000% loan notes due 2012 [Member]
Contractual obligations
Total	4
Payments due by 2012	4
Payments due by 2013-2014	0
Payments due by 2015-2016	0
Payments due after 2016	0
5.625% senior notes due 2015 [Member]
Contractual obligations
Total	350
Payments due by 2012	0
Payments due by 2013-2014	0
Payments due by 2015-2016	350
Payments due after 2016	0
Fair Value adjustment on 5.625% senior notes due 2015 [Member]
Contractual obligations
Total	20
Payments due by 2012	0
Payments due by 2013-2014	0
Payments due by 2015-2016	20
Payments due after 2016	0
4.125% senior notes due 2016 [Member]
Contractual obligations
Total	300
Payments due by 2012	0
Payments due by 2013-2014	0
Payments due by 2015-2016	300
Payments due after 2016	0
6.200% senior notes due 2017 [Member]
Contractual obligations
Total	600
Payments due by 2012	0
Payments due by 2013-2014	0
Payments due by 2015-2016	0
Payments due after 2016	600
7.000% senior notes due 2019 [Member]
Contractual obligations
Total	300
Payments due by 2012	0
Payments due by 2013-2014	0
Payments due by 2015-2016	0
Payments due after 2016	300
5.750% senior notes due 2021 [Member]
Contractual obligations
Total	500
Payments due by 2012	0
Payments due by 2013-2014	0
Payments due by 2015-2016	0
Payments due after 2016	500
Interest on Senior Notes [Member]
Contractual obligations
Total	744
Payments due by 2012	119
Payments due by 2013-2014	238
Payments due by 2015-2016	200
Payments due after 2016	187
Total debt and related interest [Member]
Contractual obligations
Total	3,152
Payments due by 2012	141
Payments due by 2013-2014	283
Payments due by 2015-2016	1,141
Payments due after 2016	1,587
Operating leases [Member]
Contractual obligations
Total	1,307
Payments due by 2012	146
Payments due by 2013-2014	203
Payments due by 2015-2016	151
Payments due after 2016	807
Pensions [Member]
Contractual obligations
Total	386
Payments due by 2012	91
Payments due by 2013-2014	181
Payments due by 2015-2016	114
Payments due after 2016	0
Other contractual obligations [Member]
Contractual obligations
Total	164
Payments due by 2012	72
Payments due by 2013-2014	13
Payments due by 2015-2016	37
Payments due after 2016	$ 42

Commitments and Contingencies (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Future minimum rental commitments under all non-cancellable operating lease agreements
2012	$ 450
Thereafter	2,436
Total	5,009
Gross Rental [Member]
Future minimum rental commitments under all non-cancellable operating lease agreements
2012	146
2013	109
2014	94
2015	79
2016	72
Thereafter	807
Total	1,307
Rentals from Subleases [Member]
Future minimum rental commitments under all non-cancellable operating lease agreements
2012	(14)
2013	(14)
2014	(13)
2015	(12)
2016	(11)
Thereafter	(32)
Total	(96)
Net Rental Commitments [Member]
Future minimum rental commitments under all non-cancellable operating lease agreements
2012	132
2013	95
2014	81
2015	67
2016	61
Thereafter	775
Total	$ 1,211

Commitments and Contingencies (Details Textual) In Millions, unless otherwise specified	12 Months Ended							1 Months Ended	12 Months Ended	1 Months Ended		12 Months Ended					12 Months Ended		24 Months Ended	36 Months Ended	12 Months Ended
	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Jul. 21, 2011 USD ($)	Jul. 21, 2011 GBP (£)	Mar. 31, 2011 Troice [Member] USD ($)	Aug. 06, 2009 Canabal [Member] USD ($)	Jul. 31, 2010 Trident V Parallel Fund [Member] USD ($)	Dec. 31, 2011 Trident V Parallel Fund [Member] USD ($)	Dec. 31, 2009 Trident V LP [Member] USD ($)	May 31, 2011 Dowling Capital Partners I [Member] USD ($)	Dec. 31, 2011 Dowling Capital Partners I [Member] USD ($)	Dec. 31, 2011 Casanova [Member] USD ($)	Mar. 11, 2011 Rishmague [Member] USD ($)	Dec. 31, 2011 Rupert [Member] USD ($)	Dec. 31, 2011 Nashville property [Member] USD ($)	Dec. 31, 2011 UK Pension Benefit [Member] USD ($)	Dec. 31, 2010 UK Pension Benefit [Member] USD ($)	Jan. 31, 2012 UK Pension Benefit [Member] USD ($)	Jan. 31, 2012 UK Pension Benefit [Member] USD ($)	Dec. 31, 2011 London headquarters building [Member] USD ($)	Dec. 31, 2010 London headquarters building [Member] USD ($)	Dec. 31, 2009 London headquarters building [Member] USD ($)	Dec. 31, 2011 6.000% loan notes due 2012 [Member]	Dec. 31, 2011 5.625% senior notes due 2015 [Member]	Dec. 31, 2011 4.125% senior notes due 2016 [Member]	Dec. 31, 2011 6.200% senior notes due 2017 [Member]	Dec. 31, 2011 7.000% senior notes due 2019 [Member]	Dec. 31, 2011 5.750% senior notes due 2021 [Member]	Dec. 31, 2011 5-year term loan facility expires 2016 [Member] USD ($)	Dec. 31, 2010 Revolving $20 million credit facility [Member] USD ($)	Dec. 31, 2011 Five year revolving credit facility [Member] USD ($)
Line of Credit Facility [Line Items]
Revolving credit facility	$ 500																														$ 20	$ 500
Percentage of loan notes																								6.00%	5.625%	4.125%	6.20%	7.00%	5.75%
Withdrawals made on revolving credit facility	0
Total repayments on the 5-year term loan due over the next 12 months																														11
Operating Leased Assets [Line Items]
Term of operating lease																					25 years
Expiry of operating lease																					2032
Gross rental commitments																					715	744
Annual rentals per year																					30	31
Subleased premises																					29.00%	25.00%
Term of sublease																					15 years
Amount received from sublease																					82	87	100
Defined Benefit Plan Disclosure [Line Items]
Contribution to defined benefit plan																				39
Further contribution to defined benefit plan																			39
Expects to contribute in respect of salary sacrifice																	12
Expected contribution to defined pension plan for the full year 2012	142																91
Total contribution for the year 2011	40	34	30														135
Loss Contingencies [Line Items]
Contributions made to defined benefit pension plans	103																92	88
Capital contributions	5	1							6			0
Other contractual obligations																63
Capital commitments								25		25	10
Minimum damage sought						1,000	1,000						5	37	300
FSA regulatory settlement				11	7
Commitments and Contingencies (Textual) [Abstract]
Remaining credit facility	20
Original non cancellable lease term	Original non-cancellable lease terms typically are between 10 and 20 years
Rent expense	127	131	154
Rental income from subleases	18	22	21
Operating lease obligations subject to guarantees	828	855
Guarantees to bankers and other third parties	7	11
Amount payable from options	72	40
Payments made to eligible clients under Assurance of Discontinuance	50
Amount of national fund for distribution to certain clients	$ 30

Accumulated Other Comprehensive Loss, Net of Tax (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of comprehensive income (loss)
Net income	$ 29	$ 60	$ 89	$ 42	$ 103	$ 65	$ 91	$ 211	$ 220	$ 470	$ 459
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment (net of tax of $nil in 2011, 2010 and 2009)									(29)	(8)	27
Unrealized holding gain (loss) (net of tax of $nil in 2011, 2010 and 2009)										2	(1)
Pension funding adjustment (net of tax of $84 million in 2011, $(12) million in 2010 and $6 million in 2009)									(172)	51	(33)
Net (loss) gain on derivative instruments (net of tax of $2 million in 2011, $(3) million in 2010 and $(16) million in 2009)									(3)	6	43
Other comprehensive (loss) income (net of tax of $86 million in 2011, $(15) million in 2010 and $(10) million in 2009)									(204)	51	36
Comprehensive income									16	521	495
Noncontrolling interests									(15)	(13)	(21)
Comprehensive income attributable to Willis Group Holdings									$ 1	$ 508	$ 474

Accumulated Other Comprehensive Loss, Net of Tax (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of accumulated other comprehensive loss, net of tax
Net foreign currency translation adjustment	$ (80)	$ (52)	$ (46)
Net unrealized holding loss	0	0	(2)
Pension funding adjustment	(675)	(503)	(554)
Net unrealized gain on derivative instruments	11	14	8
Accumulated other comprehensive loss, attributable to Willis Group Holdings, net of tax	$ (744)	$ (541)	$ (594)

- Definition

Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

+ References+ Details

- Definition

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References+ Details

- Definition

The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 26

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph i

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 158

-Paragraph 7

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e637-108580

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 14

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e681-108580

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e653-108580

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

+ Details

- Definition

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 17, 18, 19, 22, 23, 24, 25, 26

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 52

-Paragraph 12, 13

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 52

-Paragraph 31

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e637-108580

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32022-110900

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 14

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e681-108580

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e653-108580

+ Details

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

+ Details

Accumulated Other Comprehensive Loss, Net of Tax (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Comprehensive Income (Textual) [Abstract]
Foreign currency translation adjustment, Tax	$ 0	$ 0	$ 0
Unrealized holding gain (loss), Tax	0	0	0
Pension funding adjustment, Tax	84	(12)	6
Net (loss) gain on derivative instruments, Tax	2	(3)	(16)
Other comprehensive (loss) income, Tax	$ 86	$ (15)	$ (10)

- Definition

Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

+ References+ Details

- Definition

Tax effect of the adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into functional currency of the reporting entity. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

+ References+ Details

- Definition

Tax effect of the change in accumulated other comprehensive income (loss), that is, the tax effect on items included in other comprehensive income (loss) during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 31

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 36

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 24

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 20

-Section 45

-Paragraph 11

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6909487&loc=d3e39076-109324

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e640-108580

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph c(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Tax effect on the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References+ Details

- Definition

Tax effect on gross appreciation or the gross loss in value of the total of unsold securities during the period being reported on.

+ References+ Details

Equity and Noncontrolling Interests (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Equity and noncontrolling interests
Balance, beginning of year				$ 2,577				$ 2,180	$ 2,577	$ 2,180	$ 1,845
Balance, beginning of year, noncontrolling interest				31				49	31	49	50
Balance, beginning of year, total				2,608				2,229	2,608	2,229	1,895
Other comprehensive income (loss), net of tax:
Net income attributable to Willis Group Holdings	25	60	85	34	98	64	89	204	204	455	438
Net Income (Loss) Attributable to Noncontrolling Interest									16	15	21
Net income	29	60	89	42	103	65	91	211	220	470	459
Other comprehensive income, net of tax, portion attributable to parent									(203)	53	36
Other comprehensive income, net of tax, portion attributable to noncontrolling interest									(1)	(2)
Other comprehensive income, net of tax									(204)	51	36
Comprehensive income									1	508	474
Comprehensive income attributable noncontrolling interest									15	13	21
Comprehensive income, total									16	521	495
Dividends									(195)	(204)	(189)
Additional paid-in capital									88	67	32
Shares reissued under stock compensation plans											1
Purchase of subsidiary shares from noncontrolling interests, net										(5)	(10)
Additional noncontrolling interests											5
Balance, end of year	2,486				2,577				2,486	2,577	2,180
Balance, end of year, noncontrolling interest	31				31				31	31	49
Balance, end of year, total	2,517				2,608				2,517	2,608	2,229
Willis Group Holdings shareholders
Other comprehensive income (loss), net of tax:
Net income attributable to Willis Group Holdings									204	455	438
Dividends									(180)	(178)	(172)
Additional paid-in capital									88	67	32
Shares reissued under stock compensation plans											1
Noncontrolling Interest [Member]
Equity and noncontrolling interests
Balance, beginning of year, noncontrolling interest				31				49	31	49	50
Other comprehensive income (loss), net of tax:
Net Income (Loss) Attributable to Noncontrolling Interest									16	15	21
Comprehensive income attributable noncontrolling interest									15	13	21
Dividends									(15)	(26)	(17)
Purchase of subsidiary shares from noncontrolling interests, net										(5)	(10)
Additional noncontrolling interests											5
Balance, end of year, noncontrolling interest	$ 31				$ 31				$ 31	$ 31	$ 49

Equity and Noncontrolling Interests (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net income attributable to Willis Group Holdings	$ 25	$ 60	$ 85	$ 34	$ 98	$ 64	$ 89	$ 204	$ 204	$ 455	$ 438
Effects of changes in ownership interest in subsidiaries
Decrease in Willis Group Holdings' paid-in capital for purchase of noncontrolling interest										(19)	(23)
Increase in Willis Group Holdings paid-in capital for sale of noncontrolling interest											1
Net transfers from noncontrolling interests										(19)	(22)
Change from net income attributable to Willis Group Holdings and transfers from noncontrolling interests									204	436	416
Willis Group Holdings shareholders [Member]
Net income attributable to Willis Group Holdings									$ 204	$ 455	$ 438

- Definition

This element represents the total net income attributable to the parent for the period and the effect of net changes during the period impacting the parent's ownership interest in a subsidiary as it relates to the total (consolidated) equity attributable to the parent. The changes to the parent's ownership interest in a subsidiary represented by this element did not result in a deconsolidation of the subsidiary from the consolidated financial statements.

+ References+ Details

- Definition

The increase (decrease) during the period impacting the parent's ownership interest in a subsidiary as it relates to the total (consolidated) equity attributable to the parent. The changes to the parent's ownership interest in a subsidiary represented by this element did not arise in a deconsolidation of the subsidiary from the consolidated financial statements.

+ References+ Details

- Definition

Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary.

+ References+ Details

- Definition

Represents a sale by the parent of a portion of its equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The sale of the equity interest represented by this element does not result in a loss of control by the parent.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e565-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.22)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph A7

-Appendix A

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.18)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.19)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 87-21

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 10, 15

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28, 29, 30

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 19

Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 20

-Article 9

Reference 13: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 14: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

Reference 15: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

Reference 16: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Supplemental Disclosures of Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Supplemental disclosures of cash flow information:
Cash payments for income taxes, net	$ 15	$ 99	$ 80
Cash payments for interest	128	163	179
Supplemental disclosures of non-cash flow investing and financing activities:
Write off of unamortized debt issuance costs	(23)
Assets Acquired under capital leases		23
Non cash proceeds from reorganization of investments in associates (Note 6)			126
Issue of stock on acquisitions of subsidiaries			1
Issue of loan notes on acquisitions of noncontrolling interests			13
Issue of stock on acquisitions of noncontrolling interests			11
Deferred payments on acquisitions of subsidiaries	3		1
Deferred payments on acquisitions of noncontrolling interests	8	13	1
Acquisitions:
Fair Value of Assets Acquired	6	12	28
Less:
Liabilities assumed	(3)	(18)	(55)
Cash acquired	(3)		(12)
Net liabilities assumed, net of cash acquired		$ (6)	$ (39)

Derivative Financial Instruments and Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
US dollar [Member]
Interest Rate Risk
Interest rate derivatives cash flow hedges, Notional Amount	$ 740	$ 725
Interest rate derivatives cash flow hedges, Termination Dates	2012-2015	2011-2014
Weighted average interest rate, Receive	2.20%	2.44%
Weighted average interest rate, Pay	0.88%	1.33%
Pounds sterling [Member]
Interest Rate Risk
Interest rate derivatives cash flow hedges, Notional Amount	241	229
Interest rate derivatives cash flow hedges, Termination Dates	2012-2015	2011-2014
Weighted average interest rate, Receive	3.00%	3.16%
Weighted average interest rate, Pay	1.35%	1.88%
Euro [Member]
Interest Rate Risk
Interest rate derivatives cash flow hedges, Notional Amount	$ 143	$ 155
Interest rate derivatives cash flow hedges, Termination Dates	2012-2015	2011-2014
Weighted average interest rate, Receive	2.31%	2.18%
Weighted average interest rate, Pay	1.33%	1.81%

Derivative Financial Instruments and Hedging Activities (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
US dollar [Member]
Foreign currency risk
Foreign currency derivatives cash flow hedges, Sell	$ 235	$ 315
Euro [Member]
Foreign currency risk
Foreign currency derivatives cash flow hedges, Sell	129	157
Japanese yen [Member]
Foreign currency risk
Foreign currency derivatives cash flow hedges, Sell	$ 50	$ 64

Derivative Financial Instruments and Hedging Activities (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets:
Derivative assets financial and hedging instruments, fair value	$ 52	$ 47
Liabilities:
Derivative liabilities financial and hedging instruments, fair value	11	12
Interest Rate Swap [Member] \| Other Assets [Member] \| Cash Flow Hedging [Member]
Assets:
Derivative assets financial and hedging instruments, fair value	15	17
Interest Rate Swap [Member] \| Other Assets [Member] \| Fair Value Hedging [Member]
Assets:
Derivative assets financial and hedging instruments, fair value	26	14
Interest Rate Swap [Member] \| Other Liabilities [Member] \| Cash Flow Hedging [Member]
Liabilities:
Derivative liabilities financial and hedging instruments, fair value	0	2
Forward Contracts [Member] \| Other Assets [Member]
Assets:
Derivative assets financial and hedging instruments, fair value	11	16
Forward Contracts [Member] \| Other Liabilities [Member]
Liabilities:
Derivative liabilities financial and hedging instruments, fair value	$ 11	$ 10

- Definition

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details

- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details

Derivative Financial Instruments and Hedging Activities (Details 3) (Cash Flow Hedging [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Derivatives in cash flow hedging relationships [Abstract]
Amount of gain (loss) recognized in OCI on derivative (effective element)	$ 16	$ 15	$ 41
Amount of gain (loss) reclassified from accumulated OCI into income (effective element)	(21)	(6)	18
Amount of gain (loss) recognized in income on derivative (ineffective hedges and ineffective element of effective hedges)	(2)	0	(1)
Interest Rate Swap [Member]
Derivatives in cash flow hedging relationships [Abstract]
Amount of gain (loss) recognized in OCI on derivative (effective element)	13	15	16
Interest Rate Swap [Member] \| Investment Income [Member]
Derivatives in cash flow hedging relationships [Abstract]
Amount of gain (loss) reclassified from accumulated OCI into income (effective element)	(14)	(26)	(27)
Interest Rate Swap [Member] \| Other Operating Expense [Member]
Derivatives in cash flow hedging relationships [Abstract]
Amount of gain (loss) recognized in income on derivative (ineffective hedges and ineffective element of effective hedges)	0	0	(1)
Forward Contracts [Member]
Derivatives in cash flow hedging relationships [Abstract]
Amount of gain (loss) recognized in OCI on derivative (effective element)	3	0	25
Forward Contracts [Member] \| Other Operating Expense [Member]
Derivatives in cash flow hedging relationships [Abstract]
Amount of gain (loss) reclassified from accumulated OCI into income (effective element)	(7)	20	45
Forward Contracts [Member] \| Interest Expense [Member]
Derivatives in cash flow hedging relationships [Abstract]
Amount of gain (loss) recognized in income on derivative (ineffective hedges and ineffective element of effective hedges)	$ (2)	$ 0	$ 0

- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References+ Details

- Definition

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References+ Details

- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References+ Details

Derivative Financial Instruments and Hedging Activities (Details 4) (Interest Rate Swap [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Interest Rate Swap [Member]
Derivative in fair value hedging relationships [Abstract]
Hedged item in fair value hedging relationship	5.625% senior notes due 2015	5.625% senior notes due 2015
Gain (loss) recognized for derivative	$ 7	$ 14
Gain (loss) recognized for hedged item	(8)	(12)
Ineffectiveness recognized in interest expense	$ 1	$ (2)

Derivative Financial Instruments and Hedging Activities (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Senior Notes [Member]	Dec. 31, 2011 Senior Notes Due 2015 [Member]	Dec. 31, 2011 Five Year Term Loan Facility [Member]	Dec. 31, 2011 Revolving credit facility [Member]	Dec. 31, 2011 Revolving $500 million credit facility [Member]	Dec. 31, 2010 Revolving $500 million credit facility [Member]	Aug. 09, 2010 Revolving $200 million credit facility [Member]
Derivative Financial Instruments and Hedging Activities (Textual) [Abstract]
Offer to repurchase 5.125% senior notes due July 2010			$ 2,050	$ 350
Percentage of loan notes				5.625%
5-year term loan facility balance					300
Maturity period of term loan					5 years
Revolving credit facility							0	90
Revolving credit facilities available	500					520	500		200
Debt Instrument, Description of Variable Rate Basis					LIBOR		LIBOR
Debt Instrument, Basis Spread on Variable Rate					1.50%		1.50%
Derivative Financial Instruments and Hedging Activities Additional (Textual) [Abstract]
Notional amount of interest rate swaps	350
Maturity date of interest rate swaps	Jul. 15, 2015	Jul. 15, 2015
Weighted average fixed rate	2.71%
Weighted average variable rate	0.44%
Net derivative (gains) reclassified from accumulated comprehensive income into earnings within the next twelve months	$ 2

Fair Value Measurement (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets at fair value:
Cash and cash equivalents	$ 436	$ 316
Fiduciary funds (included within Fiduciary assets)	1,688	1,764
Derivative financial instruments	52	47
Total assets	2,176	2,127
Liabilities at fair value:
Derivative financial instruments	11	12
Changes in fair value of hedged debt	20	12
Total liabilities	31	24
Quoted prices in active markets for identical assets Level 1 [Member]
Assets at fair value:
Cash and cash equivalents	436	316
Fiduciary funds (included within Fiduciary assets)	1,688	1,764
Derivative financial instruments	0	0
Total assets	2,124	2,080
Liabilities at fair value:
Derivative financial instruments	0	0
Changes in fair value of hedged debt	0	0
Total liabilities	0	0
Significant other observable inputs Level 2 [Member]
Assets at fair value:
Cash and cash equivalents	0	0
Fiduciary funds (included within Fiduciary assets)	0	0
Derivative financial instruments	52	47
Total assets	52	47
Liabilities at fair value:
Derivative financial instruments	11	12
Changes in fair value of hedged debt	20	12
Total liabilities	31	24
Significant other unobservable inputs Level 3 [Member]
Assets at fair value:
Cash and cash equivalents	0	0
Fiduciary funds (included within Fiduciary assets)	0	0
Derivative financial instruments	0	0
Total assets	0	0
Liabilities at fair value:
Derivative financial instruments	0	0
Changes in fair value of hedged debt	0	0
Total liabilities	$ 0	$ 0

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

+ References+ Details

- Definition

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

+ References+ Details

- Definition

Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

+ References+ Details

Fair Value Measurement (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Liabilities:
Short-term debt	$ 15	$ 110
Long-term debt	2,354	2,157
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Assets:
Cash and cash equivalents	436	316
Fiduciary funds (included with in Fiduciary assets)	1,688	1,764
Derivative financial instruments	52	47
Liabilities:
Short-term debt	15	110
Long-term debt	2,354	2,157
Derivative financial instruments	11	12
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets:
Cash and cash equivalents, fair value	436	316
Fiduciary funds (included within Fiduciary assets), fair value	1,688	1,764
Derivative financial instruments	52	47
Liabilities:
Short term debt, fair value	15	110
Long-term Debt, Fair Value	2,499	2,450
Derivative financial instruments	$ 11	$ 12

Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Information regarding operating segments
Commissions and fees									$ 3,414	$ 3,293	$ 3,200
Investment income									31	38	50
Other income									2	1	3
Total Revenues	819	760	861	1,007	833	731	797	971	3,447	3,332	3,253
Depreciation and amortization									142	145	164
Operating income									566	753	690
Interest in earnings of associates, net of tax									12	23	33
Total Retail [Member]
Information regarding operating segments
Commissions and fees									2,341	2,306	2,279
Investment income									22	29	33
Other income									2	1	3
Total Revenues									2,365	2,336	2,315
Depreciation and amortization									46	45	49
Operating income									492	546	544
Interest in earnings of associates, net of tax									12	23	33
Total Operating Segments [Member]
Information regarding operating segments
Commissions and fees									3,414	3,293	3,200
Investment income									31	38	50
Other income									2	1	3
Total Revenues									3,447	3,332	3,253
Depreciation and amortization									69	63	64
Operating income									844	866	855
Interest in earnings of associates, net of tax									12	23	33
Corporate and Other [Member]
Information regarding operating segments
Depreciation and amortization									73	82	100
Operating income									(278)	(113)	(165)
Global [Member]
Information regarding operating segments
Commissions and fees									1,073	987	921
Investment income									9	9	17
Total Revenues									1,082	996	938
Depreciation and amortization									23	18	15
Operating income									352	320	311
North America [Member]
Information regarding operating segments
Commissions and fees									1,314	1,369	1,381
Investment income									7	15	15
Other income									2	1	3
Total Revenues									1,323	1,385	1,399
Depreciation and amortization									28	23	23
Operating income									271	320	328
International [Member]
Information regarding operating segments
Commissions and fees									1,027	937	898
Investment income									15	14	18
Total Revenues									1,042	951	916
Depreciation and amortization									18	22	26
Operating income									221	226	216
Interest in earnings of associates, net of tax									$ 12	$ 23	$ 33

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References+ Details

- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 19

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 6

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.12)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6382870&loc=d3e33749-111570

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 7

+ Details

- Definition

Income from agency and brokerage operations (includes sales of annuities and supplemental contracts); service charges, commissions, and fees from the sale of insurance and related services; and management fees from separate accounts, deferred annuities, and universal life products. May also include an entity's proportionate share of the income or loss before extraordinary items and other adjustments from its investments in: unconsolidated subsidiaries, associated companies, and corporate joint ventures, unincorporated joint ventures, general partnerships, and limited partnerships over which the entity exercises significant influence that are principally engaged in insurance underwriting, reinsurance, or insurance sales activities.

+ References+ Details

Segment Information (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Corporate and other information
Amortization of intangible assets	$ (68)	$ (82)	$ (100)
Venezuela currency devaluation		(12)
OPERATING INCOME	566	753	690
All Other Segments [Member]
Corporate and other information
Amortization of intangible assets	(68)	(82)	(100)
Foreign exchange hedging	5	(16)	(42)
Foreign exchange gain (loss) on the UK pension plan asset		3	(6)
HRH integration costs			(18)
Net gain (loss) on disposal of operations	4	(2)	13
2011 Operational Review	(180)
FSA regulatory settlement	(11)
Venezuela currency devaluation		(12)
Write-off of uncollectible accounts receivable	(22)
Redomicile of parent company costs			(6)
Other	(6)	(4)	(6)
OPERATING INCOME	$ (278)	$ (113)	$ (165)

Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Total consolidated operating income
Total consolidated operating income	$ 566	$ 753	$ 690
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs	(171)
Interest expense	(156)	(166)	(174)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES	$ 239	$ 587	$ 516

- Definition

The cost of borrowed funds accounted for as interest that was charged against earnings during the period.

+ References+ Details

Segment Information (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Commissions and fees:
Retail insurance services									$ 2,341	$ 2,306	$ 2,279
Specialty insurance services									1,073	987	921
Total commissions and fees									3,414	3,293	3,200
Investment income									31	38	50
Other income									2	1	3
Total Revenues	819	760	861	1,007	833	731	797	971	3,447	3,332	3,253
Global [Member]
Commissions and fees:
Specialty insurance services									1,073	987	921
Total commissions and fees									1,073	987	921
Investment income									9	9	17
Total Revenues									1,082	996	938
North America [Member]
Commissions and fees:
Retail insurance services									1,314	1,369	1,381
Total commissions and fees									1,314	1,369	1,381
Investment income									7	15	15
Other income									2	1	3
Total Revenues									1,323	1,385	1,399
International [Member]
Commissions and fees:
Retail insurance services									1,027	937	898
Total commissions and fees									1,027	937	898
Investment income									15	14	18
Total Revenues									$ 1,042	$ 951	$ 916

- Definition

+ References+ Details

Segment Information (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Commissions and fees
Commissions and fees	$ 3,414	$ 3,293	$ 3,200
Fixed assets
Fixed assets	406	381
UK [Member]
Commissions and fees
Commissions and fees for foreign country	963	902	859
Fixed assets
Fixed assets for foreign country	171	163
US [Member]
Commissions and fees
Commissions and fees for foreign country	1,461	1,503	1,508
Fixed assets
Fixed assets for foreign country	194	178
Other [Member]
Commissions and fees
Commissions and fees for foreign country	990	888	833
Fixed assets
Fixed assets for foreign country	$ 41	$ 40

- Definition

+ References+ Details

- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ References+ Details

Segment Information (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Country	Dec. 31, 2010 Country	Dec. 31, 2009
Segment information (Textual) [Abstract]
The release of funds related to potential legal liabilities	$ 12	$ 7	$ 0
No of customer represented more than 10 percent of the company's consolidated commission and fees	0.00%	0.00%	0.00%
Number of countries that represent more than 10 percent of the Company's consolidated commissions and fees and/or fixed assets	2	2

Subsidiary Undertakings (Details)	Dec. 31, 2011
TAI Limited [Member]
Schedule of Investments [Line Items]
Country of registration	England and Wales
Class of share	Ordinary shares
Percentage ownership in subsidiary	100.00%
Trinity Acquisition plc. [Member]
Schedule of Investments [Line Items]
Country of registration	England and Wales
Class of share	Ordinary shares
Percentage ownership in subsidiary	100.00%
Willis Faber Limited [Member]
Schedule of Investments [Line Items]
Country of registration	England and Wales
Class of share	Ordinary shares
Percentage ownership in subsidiary	100.00%
Willis Group Limited [Member]
Schedule of Investments [Line Items]
Country of registration	England and Wales
Class of share	Ordinary shares
Percentage ownership in subsidiary	100.00%
Willis Investment UK Holdings Limited Member
Schedule of Investments [Line Items]
Country of registration	England and Wales
Class of share	Ordinary shares
Percentage ownership in subsidiary	100.00%
Willis Netherlands Holdings B.V. [Member]
Schedule of Investments [Line Items]
Country of registration	Netherlands
Class of share	Ordinary shares
Percentage ownership in subsidiary	100.00%
Willis Europe B.V. [Member]
Schedule of Investments [Line Items]
Country of registration	England and Wales
Class of share	Ordinary shares
Percentage ownership in subsidiary	100.00%
Willis HRH, Inc. [Member]
Schedule of Investments [Line Items]
Country of registration	USA
Class of share	Common Shares
Percentage ownership in subsidiary	100.00%
Willis Limited [Member]
Schedule of Investments [Line Items]
Country of registration	England and Wales
Class of share	Ordinary shares
Percentage ownership in subsidiary	100.00%
Willis North America, Inc. [Member]
Schedule of Investments [Line Items]
Country of registration	USA
Class of share	Common Shares
Percentage ownership in subsidiary	100.00%
Willis Re, Inc. [Member]
Schedule of Investments [Line Items]
Country of registration	USA
Class of share	Common Shares
Percentage ownership in subsidiary	100.00%

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
REVENUES
Commissions and fees									$ 3,414	$ 3,293	$ 3,200
Investment income									31	38	50
Other Income									2	1	3
Total revenues	819	760	861	1,007	833	731	797	971	3,447	3,332	3,253
EXPENSES
Salaries and benefits									(2,087)	(1,868)	(1,822)
Other operating expenses									(656)	(564)	(590)
Depreciation expense									(74)	(63)	(64)
Amortization of intangible assets									(68)	(82)	(100)
Net gain (loss) on disposal of operations									4	(2)	13
Total expenses	(738)	(670)	(705)	(768)	(656)	(625)	(629)	(669)	(2,881)	(2,579)	(2,563)
OPERATING INCOME									566	753	690
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs									(171)
Interest expense									(156)	(166)	(174)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									239	587	516
Income taxes									(32)	(140)	(94)
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									207	447	422
Interest in earnings of associates, net of tax									12	23	33
INCOME FROM CONTINUING OPERATIONS									219	470	455
Discontinued operations, net of tax									1		4
NET INCOME	29	60	89	42	103	65	91	211	220	470	459
Less: net income attributable to noncontrolling interests									(16)	(15)	(21)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	25	60	85	34	98	64	89	204	204	455	438
Willis Group Holdings [Member]
EXPENSES
Salaries and benefits									(3)
Other operating expenses									(17)	335
Net gain (loss) on disposal of operations										(347)
Total expenses									(20)	(12)
OPERATING INCOME									(20)	(12)
Investment income from Group undertakings									35
Interest expense									(34)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									(19)	(12)
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									(19)	(12)
INCOME FROM CONTINUING OPERATIONS									(19)	(12)
NET INCOME									(19)	(12)
EQUITY ACCOUNT FOR SUBSIDIARIES									223	467	438
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS									204	455	438
The Other Guarantors [Member]
REVENUES
Investment income									11	10
Total revenues									11	10
EXPENSES
Other operating expenses									32	(10)	57
Total expenses									32	(10)	57
OPERATING INCOME									43		57
Investment income from Group undertakings									406	1,683	917
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs									(171)
Interest expense									(251)	(423)	(415)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									27	1,260	559
Income taxes									56	16	(5)
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									83	1,276	554
INCOME FROM CONTINUING OPERATIONS									83	1,276	554
NET INCOME									83	1,276	554
EQUITY ACCOUNT FOR SUBSIDIARIES									91	(823)	(156)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS									174	453	398
The Issuer [Member]
REVENUES
Investment income									2	2	4
Total revenues									2	2	4
EXPENSES
Salaries and benefits									(69)	(65)	(28)
Other operating expenses									(98)	(45)	(34)
Depreciation expense									(14)	(9)	(8)
Total expenses									(181)	(119)	(70)
OPERATING INCOME									(179)	(117)	(66)
Investment income from Group undertakings									341	356	492
Interest expense									(159)	(157)	(173)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									3	82	253
Income taxes									27	29	20
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									30	111	273
INCOME FROM CONTINUING OPERATIONS									30	111	273
NET INCOME									30	111	273
EQUITY ACCOUNT FOR SUBSIDIARIES									(66)	(76)	(30)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS									(36)	35	243
Other [Member]
REVENUES
Commissions and fees									3,414	3,293	3,200
Investment income									29	36	46
Other Income									24	1	3
Total revenues									3,467	3,330	3,249
EXPENSES
Salaries and benefits									(2,015)	(1,818)	(1,808)
Other operating expenses									(571)	(825)	(617)
Depreciation expense									(60)	(54)	(56)
Amortization of intangible assets									(74)	(82)	(100)
Net gain (loss) on disposal of operations									7	350	13
Total expenses									(2,713)	(2,429)	(2,563)
OPERATING INCOME									754	901	686
Investment income from Group undertakings									157	952	504
Interest expense									(332)	(374)	(346)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									265	1,479	844
Income taxes									(117)	(186)	(110)
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									148	1,293	734
Interest in earnings of associates, net of tax									4	16	33
INCOME FROM CONTINUING OPERATIONS									152	1,309	767
Discontinued operations, net of tax									1		4
NET INCOME									153	1,309	771
Less: net income attributable to noncontrolling interests									(16)	(15)	(4)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS									137	1,294	767
Consolidating adjustments [Member]
REVENUES
Investment income									(11)	(10)
Other Income									(22)
Total revenues									(33)	(10)
EXPENSES
Salaries and benefits									0	15	9
Other operating expenses									(2)	(19)	4
Amortization of intangible assets									6
Net gain (loss) on disposal of operations									(3)	(5)
Total expenses									1	(9)	13
OPERATING INCOME									(32)	(19)	13
Investment income from Group undertakings									(625)	(2,991)	(1,913)
Interest expense									620	788	760
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									(37)	(2,222)	(1,140)
Income taxes									2	1	1
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									(35)	(2,221)	(1,139)
Interest in earnings of associates, net of tax									8	7
INCOME FROM CONTINUING OPERATIONS									(27)	(2,214)	(1,139)
NET INCOME									(27)	(2,214)	(1,139)
Less: net income attributable to noncontrolling interests											(17)
EQUITY ACCOUNT FOR SUBSIDIARIES									(248)	432	(252)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS									$ (275)	$ (1,782)	$ (1,408)

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
CURRENT ASSETS
Cash and cash equivalents	$ 436	$ 316	$ 221	$ 205
Accounts receivable, net	910	839
Fiduciary assets	9,338	9,569
Deferred tax assets	44	36
Other current assets	259	340
Total current assets	10,987	11,100
Investments in subsidiaries	0	0
Amounts owed by (to) Group undertakings	0	0
NON-CURRENT ASSETS
Fixed assets, net	406	381
Goodwill	3,295	3,294	3,277
Other intangible assets, net	420	492
Investments in associates	170	161
Deferred tax assets	22	7
Pension benefits asset	145	182
Other non-current assets	283	233
Total non-current assets	4,741	4,750
TOTAL ASSETS	15,728	15,850
CURRENT LIABILITIES
Fiduciary liabilities	9,338	9,569
Deferred revenue and accrued expenses	320	298
Income taxes payable	15	57
Short-term debt and current portion of long-term debt	15	110
Deferred tax liabilities	26	9
Other current liabilities	282	266
Total current liabilities	9,996	10,309
NON-CURRENT LIABILITIES
Long-term debt	2,354	2,157
Liabilities for pension benefits	270	167
Deferred tax liabilities	32	83
Provisions for liabilities	196	179	226
Other non-current liabilities	363	347
Total non-current liabilities	3,215	2,933
Total liabilities	13,211	13,242
EQUITY
Total Willis Group Holdings shareholders' equity	2,486	2,577	2,180	1,845
Noncontrolling interests	31	31	49	50
Total equity	2,517	2,608	2,229	1,895
TOTAL LIABILITIES AND EQUITY	15,728	15,850
Willis Group Holdings [Member]
CURRENT ASSETS
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	2	2
Fiduciary assets	0	0
Deferred tax assets	0	0
Other current assets	1	0
Total current assets	3	2
Investments in subsidiaries	(1,023)	(1,039)
Amounts owed by (to) Group undertakings	4,354	3,659
NON-CURRENT ASSETS
Fixed assets, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Investments in associates	0	0
Deferred tax assets	0	0
Pension benefits asset	0	0
Other non-current assets	5	0
Total non-current assets	5	0
TOTAL ASSETS	3,339	2,622
CURRENT LIABILITIES
Fiduciary liabilities	0	0
Deferred revenue and accrued expenses	2	1
Income taxes payable	0	0
Short-term debt and current portion of long-term debt	0	0
Deferred tax liabilities	0	0
Other current liabilities	56	44
Total current liabilities	58	45
NON-CURRENT LIABILITIES
Long-term debt	795	0
Liabilities for pension benefits	0	0
Deferred tax liabilities	0	0
Provisions for liabilities	0	0
Other non-current liabilities	0	0
Total non-current liabilities	795	0
Total liabilities	853	45
EQUITY
Total Willis Group Holdings shareholders' equity	2,486	2,577
Noncontrolling interests	0	0
Total equity	2,486	2,577
TOTAL LIABILITIES AND EQUITY	3,339	2,622
The Other Guarantors [Member]
CURRENT ASSETS
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Fiduciary assets	0	0
Deferred tax assets	1	0
Other current assets	52	23
Total current assets	53	23
Investments in subsidiaries	3,778	3,814
Amounts owed by (to) Group undertakings	(4,716)	(4,590)
NON-CURRENT ASSETS
Fixed assets, net	4	0
Goodwill	0	0
Other intangible assets, net	0	0
Investments in associates	0	0
Deferred tax assets	0	0
Pension benefits asset	0	0
Other non-current assets	170	166
Total non-current assets	174	166
TOTAL ASSETS	(711)	(587)
CURRENT LIABILITIES
Fiduciary liabilities	0	0
Deferred revenue and accrued expenses	0	0
Income taxes payable	40	0
Short-term debt and current portion of long-term debt	11	0
Deferred tax liabilities	0	3
Other current liabilities	11	15
Total current liabilities	62	18
NON-CURRENT LIABILITIES
Long-term debt	289	500
Liabilities for pension benefits	0	0
Deferred tax liabilities	5	3
Provisions for liabilities	0	0
Other non-current liabilities	9	10
Total non-current liabilities	303	513
Total liabilities	365	531
EQUITY
Total Willis Group Holdings shareholders' equity	(1,076)	(1,118)
Noncontrolling interests	0	0
Total equity	(1,076)	(1,118)
TOTAL LIABILITIES AND EQUITY	(711)	(587)
The Issuer [Member]
CURRENT ASSETS
Cash and cash equivalents	163	76	104	0
Accounts receivable, net	3	0
Fiduciary assets	0	0
Deferred tax assets	0	1
Other current assets	21	57
Total current assets	187	134
Investments in subsidiaries	1,482	1,455
Amounts owed by (to) Group undertakings	476	1,002
NON-CURRENT ASSETS
Fixed assets, net	59	52
Goodwill	0	0
Other intangible assets, net	0	0
Investments in associates	0	0
Deferred tax assets	0	0
Pension benefits asset	0	0
Other non-current assets	43	41
Total non-current assets	102	93
TOTAL ASSETS	2,247	2,684
CURRENT LIABILITIES
Fiduciary liabilities	0	0
Deferred revenue and accrued expenses	0	0
Income taxes payable	0	0
Short-term debt and current portion of long-term debt	0	110
Deferred tax liabilities	1	1
Other current liabilities	57	38
Total current liabilities	58	149
NON-CURRENT LIABILITIES
Long-term debt	1,270	1,653
Liabilities for pension benefits	0	0
Deferred tax liabilities	35	26
Provisions for liabilities	0	0
Other non-current liabilities	9	16
Total non-current liabilities	1,314	1,695
Total liabilities	1,372	1,844
EQUITY
Total Willis Group Holdings shareholders' equity	875	840
Noncontrolling interests	0	0
Total equity	875	840
TOTAL LIABILITIES AND EQUITY	2,247	2,684
Other [Member]
CURRENT ASSETS
Cash and cash equivalents	273	240	117	205
Accounts receivable, net	877	809
Fiduciary assets	9,941	10,167
Deferred tax assets	43	35
Other current assets	271	293
Total current assets	11,405	11,544
Investments in subsidiaries	3,848	3,855
Amounts owed by (to) Group undertakings	(114)	(71)
NON-CURRENT ASSETS
Fixed assets, net	345	330
Goodwill	1,704	1,696
Other intangible assets, net	435	492
Investments in associates	(45)	(51)
Deferred tax assets	22	7
Pension benefits asset	145	182
Other non-current assets	192	149
Total non-current assets	2,798	2,805
TOTAL ASSETS	17,937	18,133
CURRENT LIABILITIES
Fiduciary liabilities	9,941	10,167
Deferred revenue and accrued expenses	318	297
Income taxes payable	30	69
Short-term debt and current portion of long-term debt	4	0
Deferred tax liabilities	25	5
Other current liabilities	185	189
Total current liabilities	10,503	10,727
NON-CURRENT LIABILITIES
Long-term debt	0	4
Liabilities for pension benefits	270	167
Deferred tax liabilities	(9)	54
Provisions for liabilities	198	183
Other non-current liabilities	345	321
Total non-current liabilities	804	729
Total liabilities	11,307	11,456
EQUITY
Total Willis Group Holdings shareholders' equity	6,599	6,646
Noncontrolling interests	31	31
Total equity	6,630	6,677
TOTAL LIABILITIES AND EQUITY	17,937	18,133
Consolidating adjustments [Member]
CURRENT ASSETS
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	28	28
Fiduciary assets	(603)	(598)
Deferred tax assets	0	0
Other current assets	(86)	(33)
Total current assets	(661)	(603)
Investments in subsidiaries	(8,085)	(8,085)
Amounts owed by (to) Group undertakings	0	0
NON-CURRENT ASSETS
Fixed assets, net	(2)	(1)
Goodwill	1,591	1,598
Other intangible assets, net	(15)	0
Investments in associates	215	212
Deferred tax assets	0	0
Pension benefits asset	0	0
Other non-current assets	(127)	(123)
Total non-current assets	1,662	1,686
TOTAL ASSETS	(7,084)	(7,002)
CURRENT LIABILITIES
Fiduciary liabilities	(603)	(598)
Deferred revenue and accrued expenses	0	0
Income taxes payable	(55)	(12)
Short-term debt and current portion of long-term debt	0	0
Deferred tax liabilities	0	0
Other current liabilities	(27)	(20)
Total current liabilities	(685)	(630)
NON-CURRENT LIABILITIES
Long-term debt	0	0
Liabilities for pension benefits	0	0
Deferred tax liabilities	1	0
Provisions for liabilities	(2)	(4)
Other non-current liabilities	0	0
Total non-current liabilities	(1)	(4)
Total liabilities	(686)	(634)
EQUITY
Total Willis Group Holdings shareholders' equity	(6,398)	(6,368)
Noncontrolling interests	0	0
Total equity	(6,398)	(6,368)
TOTAL LIABILITIES AND EQUITY	$ (7,084)	$ (7,002)

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Details 2) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended						12 Months Ended
	Mar. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Willis Group Holdings [Member]	Dec. 31, 2010 Willis Group Holdings [Member]	Dec. 31, 2008 Willis Group Holdings [Member]	Dec. 31, 2011 The Other Guarantors [Member]	Dec. 31, 2010 The Other Guarantors [Member]	Dec. 31, 2009 The Other Guarantors [Member]	Dec. 31, 2011 The Issuer [Member]	Dec. 31, 2010 The Issuer [Member]	Dec. 31, 2009 The Issuer [Member]	Dec. 31, 2011 Other [Member]	Dec. 31, 2010 Other [Member]	Dec. 31, 2009 Other [Member]	Dec. 31, 2011 Consolidating adjustments [Member]	Dec. 31, 2010 Consolidating adjustments [Member]	Dec. 31, 2009 Consolidating adjustments [Member]
Consolidated Statements of Cash Flows [Abstract]
NET CASH (USED BY) PROVIDED BY OPERATING ACTIVITIES		$ 439	$ 489	$ 419	$ (41)	$ (9)		$ 184	$ 1,170	$ 867	$ 88	$ 83	$ 390	$ 1,269	$ 1,572	$ 27	$ (1,061)	$ (2,327)	$ (865)
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		13	10	20										13	10	20
Purchases of fixed assets		(111)	(83)	(96)				(4)			(21)	(7)	(17)	(86)	(76)	(79)
Acquisitions of subsidiaries, net of cash acquired		(10)	(21)											(10)	(21)
Acquisition of investments in associates		(2)	(1)	(42)										(2)	(1)	(42)
Investment in Trident V Parallel Fund, LP		(5)	(1)											(5)	(1)
Proceeds from reorganization of investments in associates				155												155
Proceeds from sale of continuing operations, net of cash disposed			2	4											2	4
Proceeds from sale of discontinued operations, net of cash disposed		14		40										14		40
Proceeds on sale of short-term investments				21												21
Total net cash (used in) provided by continuing investing activities		(101)	(94)	102				(4)			(21)	(7)	(17)	(76)	(87)	119
CASH FLOWS FROM FINANCING ACTIVITIES
(Repayment on) proceeds from draw down of revolving credit facility		(90)	90								(90)	90
Senior notes issued	800	794		800	794					500			300
Debt issuance costs		(12)		(22)	(7)			(5)		(18)			(4)
Proceeds from issue of term loan		300						300
Repayments of debt		(911)	(209)	(1,089)				(500)			(411)	(200)	(1,090)		(9)	1
Make whole on repurchase and redemption of senior notes		(158)						(158)
Proceeds from issue of shares		60	36	18	60	36										18
Excess tax benefits from share-based payment arrangements		5	2	1										5	2	1
Amounts owed by (to) Group undertakings					(626)	106		187	(317)	(646)	521	6	525	(82)	205	121
Dividends paid		(180)	(176)	(174)	(180)	(133)			(849)	(703)				(1,061)	(1,521)	(336)	1,061	2,327	865
Acquisition of noncontrolling interests		(9)	(10)	(33)				(4)	(4)					(5)	(6)	(33)
Dividends paid to noncontrolling interests		(13)	(26)	(17)										(13)	(26)	(17)
Total net cash used in continuing financing activities		(214)	(293)	(516)	41	9		(180)	(1,170)	(867)	20	(104)	(269)	(1,156)	(1,355)	(245)	1,061	2,327	865
INCREASE IN CASH AND CASH EQUIVALENTS		124	102	5							87	(28)	104	37	130	(99)
Effect of exchange rate changes on cash and cash equivalents		(4)	(7)	11										(4)	(7)	11
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		316	221	205	0	0	0	0	0	0	76	104	0	240	117	205	0	0	0
CASH AND CASH EQUIVALENTS, END OF YEAR		$ 436	$ 316	$ 221	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 163	$ 76	$ 104	$ 273	$ 240	$ 117	$ 0	$ 0	$ 0

Financial Information for Parent Issuer, Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
REVENUES
Commissions and fees									$ 3,414	$ 3,293	$ 3,200
Investment income									31	38	50
Other income									2	1	3
Total revenues	819	760	861	1,007	833	731	797	971	3,447	3,332	3,253
EXPENSES
Salaries and benefits									(2,087)	(1,868)	(1,822)
Other operating expenses									(656)	(564)	(590)
Depreciation expense									(74)	(63)	(64)
Amortization of intangible assets									(68)	(82)	(100)
Net gain (loss) on disposal of operations									4	(2)	13
Total expenses	(738)	(670)	(705)	(768)	(656)	(625)	(629)	(669)	(2,881)	(2,579)	(2,563)
OPERATING INCOME									566	753	690
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs									(171)
Interest expense									(156)	(166)	(174)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									239	587	516
Income taxes									(32)	(140)	(94)
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									207	447	422
Interest in earnings of associates, net of tax									12	23	33
INCOME FROM CONTINUING OPERATIONS									219	470	455
Discontinued operations, net of tax									1		4
NET INCOME	29	60	89	42	103	65	91	211	220	470	459
Less: net income attributable to noncontrolling interests									(16)	(15)	(21)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS	25	60	85	34	98	64	89	204	204	455	438
Willis Group Holdings- the Parent Issuer
EXPENSES
Salaries and benefits									(3)
Other operating expenses									(17)	335
Net gain (loss) on disposal of operations										(347)
Total expenses									(20)	(12)
OPERATING INCOME									(20)	(12)
Investment income from Group undertakings									35
Interest expense									(34)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									(19)	(12)
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									(19)	(12)
INCOME FROM CONTINUING OPERATIONS									(19)	(12)
NET INCOME									(19)	(12)
EQUITY ACCOUNT FOR SUBSIDIARIES									223	467	438
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS									204	455	438
The Guarantors
REVENUES
Investment income									13	12	4
Total revenues									13	12	4
EXPENSES
Salaries and benefits									(69)	(65)	(28)
Other operating expenses									(66)	(55)	23
Depreciation expense									(14)	(9)	(8)
Total expenses									(149)	(129)	(13)
OPERATING INCOME									(136)	(117)	(9)
Investment income from Group undertakings									747	2,039	1,409
Make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs									(171)
Interest expense									(410)	(580)	(588)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									30	1,342	812
Income taxes									83	45	15
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									113	1,387	827
INCOME FROM CONTINUING OPERATIONS									113	1,387	827
NET INCOME									113	1,387	827
EQUITY ACCOUNT FOR SUBSIDIARIES									61	(934)	(429)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS									174	453	398
Other [Member]
REVENUES
Commissions and fees									3,414	3,293	3,200
Investment income									29	36	46
Other income									24	1	3
Total revenues									3,467	3,330	3,249
EXPENSES
Salaries and benefits									(2,015)	(1,818)	(1,803)
Other operating expenses									(571)	(825)	(617)
Depreciation expense									(60)	(54)	(56)
Amortization of intangible assets									(74)	(82)	(100)
Net gain (loss) on disposal of operations									7	350	13
Total expenses									(2,713)	(2,429)	(2,563)
OPERATING INCOME									754	901	686
Investment income from Group undertakings									(157)	952	504
Interest expense									(332)	(374)	(346)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									265	1,479	844
Income taxes									(117)	(186)	(110)
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									148	1,293	734
Interest in earnings of associates, net of tax									4	16	33
INCOME FROM CONTINUING OPERATIONS									152	1,309	767
Discontinued operations, net of tax									1		4
NET INCOME									153	1,309	771
Less: net income attributable to noncontrolling interests									(16)	(15)	(4)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS									137	1,294	767
Consolidating Adjustments [Member]
REVENUES
Investment income									(11)	(10)
Other income									(22)
Total revenues									(33)	(10)
EXPENSES
Salaries and benefits										15	9
Other operating expenses									(2)	(19)	4
Amortization of intangible assets									6
Net gain (loss) on disposal of operations									(3)	(5)
Total expenses									1	(9)	13
OPERATING INCOME									(32)	(19)	13
Investment income from Group undertakings									(625)	(2,991)	(1,913)
Interest expense									620	788	760
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND INTEREST IN EARNINGS OF ASSOCIATES									(37)	(2,222)	(1,140)
Income taxes									2	1	1
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST IN EARNINGS OF ASSOCIATES									(35)	(2,221)	(1,139)
Interest in earnings of associates, net of tax									8	7
INCOME FROM CONTINUING OPERATIONS									(27)	(2,214)	(1,139)
NET INCOME									(27)	(2,214)	(1,139)
Less: net income attributable to noncontrolling interests											(17)
EQUITY ACCOUNT FOR SUBSIDIARIES									(284)	467	(9)
NET INCOME ATTRIBUTABLE TO WILLIS GROUP HOLDINGS									$ (311)	$ (1,747)	$ (1,165)

Financial Information for Parent Issuer, Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
CURRENT ASSETS
Cash and cash equivalents	$ 436	$ 316	$ 221	$ 205
Accounts receivable, net	910	839
Fiduciary assets	9,338	9,569
Deferred tax assets	44	36
Other current assets	259	340
Total current assets	10,987	11,100
Investments in subsidiaries	0	0
Amounts owed by (to) Group undertakings	0	0
NON-CURRENT ASSETS
Fixed assets, net	406	381
Goodwill	3,295	3,294	3,277
Other intangible assets, net	420	492
Investments in associates	170	161
Deferred tax assets	22	7
Pension benefits asset	145	182
Other non-current assets	283	233
Total non-current assets	4,741	4,750
TOTAL ASSETS	15,728	15,850
CURRENT LIABILITIES
Fiduciary liabilities	9,338	9,569
Deferred revenue and accrued expenses	320	298
Income taxes payable	15	57
Short-term debt and current portion of long-term debt	15	110
Deferred tax liabilities	26	9
Other current liabilities	282	266
Total current liabilities	9,996	10,309
NON-CURRENT LIABILITIES
Long-term debt	2,354	2,157
Liabilities for pension benefits	270	167
Deferred tax liabilities	32	83
Provisions for liabilities	196	179	226
Other non-current liabilities	363	347
Total non-current liabilities	3,215	2,933
Total liabilities	13,211	13,242
EQUITY
Total of Willis Group Holdings shareholders' equity	2,486	2,577	2,180	1,845
Noncontrolling interests	31	31	49	50
Total equity	2,517	2,608	2,229	1,895
TOTAL LIABILITIES AND EQUITY	15,728	15,850
Willis Group Holdings- the Parent Issuer
CURRENT ASSETS
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	2	2
Fiduciary assets	0	0
Deferred tax assets	0	0
Other current assets	1	0
Total current assets	3	2
Investments in subsidiaries	(1,023)	(1,039)
Amounts owed by (to) Group undertakings	4,354	3,659
NON-CURRENT ASSETS
Fixed assets, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Investments in associates	0	0
Deferred tax assets	0	0
Pension benefits asset	0	0
Other non-current assets	5	0
Total non-current assets	5	0
TOTAL ASSETS	3,339	2,622
CURRENT LIABILITIES
Fiduciary liabilities	0	0
Deferred revenue and accrued expenses	2	1
Income taxes payable	0	0
Short-term debt and current portion of long-term debt	0	0
Deferred tax liabilities	0	0
Other current liabilities	56	44
Total current liabilities	58	45
NON-CURRENT LIABILITIES
Long-term debt	795	0
Liabilities for pension benefits	0	0
Deferred tax liabilities	0	0
Provisions for liabilities	0	0
Other non-current liabilities	0	0
Total non-current liabilities	795	0
Total liabilities	853	45
EQUITY
Total of Willis Group Holdings shareholders' equity	2,486	2,577
Noncontrolling interests	0	0
Total equity	2,486	2,577
TOTAL LIABILITIES AND EQUITY	3,339	2,622
The Guarantors
CURRENT ASSETS
Cash and cash equivalents	163	76	104	0
Accounts receivable, net	3	0
Fiduciary assets	0	0
Deferred tax assets	1	1
Other current assets	73	80
Total current assets	240	157
Investments in subsidiaries	4,385	4,429
Amounts owed by (to) Group undertakings	(4,240)	(3,588)
NON-CURRENT ASSETS
Fixed assets, net	63	52
Goodwill	0	0
Other intangible assets, net	0	0
Investments in associates	0	0
Deferred tax assets	0	0
Pension benefits asset	0	0
Other non-current assets	213	207
Total non-current assets	276	259
TOTAL ASSETS	661	1,257
CURRENT LIABILITIES
Fiduciary liabilities	0	0
Deferred revenue and accrued expenses	0	0
Income taxes payable	40	0
Short-term debt and current portion of long-term debt	11	110
Deferred tax liabilities	1	4
Other current liabilities	68	53
Total current liabilities	120	167
NON-CURRENT LIABILITIES
Long-term debt	1,559	2,153
Liabilities for pension benefits	0	0
Deferred tax liabilities	40	29
Provisions for liabilities	0	0
Other non-current liabilities	18	26
Total non-current liabilities	1,617	2,208
Total liabilities	1,737	2,375
EQUITY
Total of Willis Group Holdings shareholders' equity	(1,076)	(1,118)
Noncontrolling interests	0	0
Total equity	(1,076)	(1,118)
TOTAL LIABILITIES AND EQUITY	661	1,257
Other [Member]
CURRENT ASSETS
Cash and cash equivalents	273	240	117	205
Accounts receivable, net	877	809
Fiduciary assets	9,941	10,167
Deferred tax assets	43	35
Other current assets	271	293
Total current assets	11,405	11,544
Investments in subsidiaries	3,848	3,855
Amounts owed by (to) Group undertakings	(114)	(71)
NON-CURRENT ASSETS
Fixed assets, net	345	330
Goodwill	1,704	1,696
Other intangible assets, net	435	492
Investments in associates	(45)	(51)
Deferred tax assets	22	7
Pension benefits asset	145	182
Other non-current assets	192	149
Total non-current assets	2,798	2,805
TOTAL ASSETS	17,937	18,133
CURRENT LIABILITIES
Fiduciary liabilities	9,941	10,167
Deferred revenue and accrued expenses	318	297
Income taxes payable	30	69
Short-term debt and current portion of long-term debt	4	0
Deferred tax liabilities	25	5
Other current liabilities	185	189
Total current liabilities	10,503	10,727
NON-CURRENT LIABILITIES
Long-term debt	0	4
Liabilities for pension benefits	270	167
Deferred tax liabilities	(9)	54
Provisions for liabilities	198	183
Other non-current liabilities	345	321
Total non-current liabilities	804	729
Total liabilities	11,307	11,456
EQUITY
Total of Willis Group Holdings shareholders' equity	6,599	6,646
Noncontrolling interests	31	31
Total equity	6,630	6,677
TOTAL LIABILITIES AND EQUITY	17,937	18,133
Consolidating Adjustments [Member]
CURRENT ASSETS
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	28	28
Fiduciary assets	(603)	(598)
Deferred tax assets	0	0
Other current assets	(86)	(33)
Total current assets	(661)	(603)
Investments in subsidiaries	(7,210)	(7,245)
Amounts owed by (to) Group undertakings	0	0
NON-CURRENT ASSETS
Fixed assets, net	(2)	(1)
Goodwill	1,591	1,598
Other intangible assets, net	(15)	0
Investments in associates	215	212
Deferred tax assets	0	0
Pension benefits asset	0	0
Other non-current assets	(127)	(123)
Total non-current assets	1,662	1,686
TOTAL ASSETS	(6,209)	(6,162)
CURRENT LIABILITIES
Fiduciary liabilities	(603)	(598)
Deferred revenue and accrued expenses	0	0
Income taxes payable	(55)	(12)
Short-term debt and current portion of long-term debt	0	0
Deferred tax liabilities	0	0
Other current liabilities	(27)	(20)
Total current liabilities	(685)	(630)
NON-CURRENT LIABILITIES
Long-term debt	0	0
Liabilities for pension benefits	0	0
Deferred tax liabilities	1	0
Provisions for liabilities	(2)	(4)
Other non-current liabilities	0	0
Total non-current liabilities	(1)	(4)
Total liabilities	(686)	(634)
EQUITY
Total of Willis Group Holdings shareholders' equity	(5,523)	(5,528)
Noncontrolling interests	0	0
Total equity	(5,523)	(5,528)
TOTAL LIABILITIES AND EQUITY	$ (6,209)	$ (6,162)

Financial Information for Parent Issuer, Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Details 2) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended						12 Months Ended
	Mar. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Willis Group Holdings- the Parent Issuer	Dec. 31, 2010 Willis Group Holdings- the Parent Issuer	Dec. 31, 2008 Willis Group Holdings- the Parent Issuer	Dec. 31, 2011 The Guarantors	Dec. 31, 2010 The Guarantors	Dec. 31, 2009 The Guarantors	Dec. 31, 2011 Other [Member]	Dec. 31, 2010 Other [Member]	Dec. 31, 2009 Other [Member]	Dec. 31, 2011 Consolidating Adjustments [Member]	Dec. 31, 2010 Consolidating Adjustments [Member]	Dec. 31, 2009 Consolidating Adjustments [Member]
Condensed Consolidating Statement of Cash Flows
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES		$ 439	$ 489	$ 419	$ (41)	$ (9)		$ 272	$ 1,253	$ 1,257	$ 1,269	$ 1,572	$ 27	$ (1,061)	$ (2,327)	$ (865)
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on disposal of fixed and intangible assets		13	10	20							13	10	20
Purchases of fixed assets		(111)	(83)	(96)				(25)	(7)	(17)	(86)	(76)	(79)
Acquisitions of subsidiaries, net of cash acquired		(10)	(21)								(10)	(21)
Acquisition of investments in associates		(2)	(1)	(42)							(2)	(1)	(42)
Investment in Trident V Parallel Fund, LP		(5)	(1)								(5)	(1)
Proceeds from reorganization of investments in associates				155									155
Proceeds from sale of continuing operations, net of cash disposed			2	4								2	4
Proceeds from sale of discontinued operations, net of cash disposed		14		40							14		40
Proceeds on sale of short-term investments				21									21
Total net cash (used in) provided by continuing investing activities		(101)	(94)	102				(25)	(7)	(17)	(76)	(87)	119
CASH FLOWS FROM FINANCING ACTIVITIES
Repayments on revolving credit facility		(90)	90					(90)	90
Senior notes issued	800	794		800	794					800
Debt issuance costs		(12)		(22)	(7)			(5)		(22)
Proceeds from issue of term loan		300						300
Repayments of debt		(911)	(209)	(1,089)				(911)	(200)	(1,090)		(9)	1
Make whole on repurchase and redemption of senior notes		(158)						(158)
Proceeds from issue of shares		60	36	18	60	36							18
Excess tax benefits from share-based payment arrangements		5	2	1							5	2	1
Amounts owed (to) by Group undertakings					(626)	106		708	(311)	(121)	(82)	205	121
Dividends paid		(180)	(176)	(174)	(180)	(133)			(849)	(703)	(1,061)	(1,521)	(336)	1,061	2,327	865
Acquisition of noncontrolling interests		(9)	(10)	(33)				(4)	(4)		(5)	(6)	(33)
Dividends paid to noncontrolling interests		(13)	(26)	(17)							(13)	(26)	(17)
Total net cash used in continuing financing activities		(214)	(293)	(516)	41	9		(160)	(1,274)	(1,136)	(1,156)	(1,355)	(245)	1,061	2,327	865
INCREASE IN CASH AND CASH EQUIVALENTS		124	102	5				87	(28)	104	37	130	(99)
Effect of exchange rate changes on cash and cash equivalents		(4)	(7)	11							(4)	(7)	11
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR		316	221	205	0	0	0	76	104	0	240	117	205	0	0	0
CASH AND CASH EQUIVALENTS, END OF YEAR		$ 436	$ 316	$ 221	$ 0	$ 0	$ 0	$ 163	$ 76	$ 104	$ 273	$ 240	$ 117	$ 0	$ 0	$ 0

Financial Information for Parent Issuer, Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Details Textual) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Mar. 31, 2011	Dec. 31, 2011	Dec. 31, 2009
Financial Information for Parent Issuer Guarantor Subsidiaries and Non-Guarantor Subsidiaries Disclosure [Textual Abstract]
Senior notes issued	$ 800	$ 794	$ 800
Percentage of ownership in wholly on subsidiary by parent		100.00%

- Definition

The cash inflow from a debt funding received on a regular basis with maturities ranging from 5-10 years.

+ References+ Details

Quarterly Financial Data (Unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Quarterly Financial Data [Abstract]
Total Revenues	$ 819	$ 760	$ 861	$ 1,007	$ 833	$ 731	$ 797	$ 971	$ 3,447	$ 3,332	$ 3,253
Total expenses	(738)	(670)	(705)	(768)	(656)	(625)	(629)	(669)	(2,881)	(2,579)	(2,563)
Net income	29	60	89	42	103	65	91	211	220	470	459
Net income attributable to Willis Group Holdings	$ 25	$ 60	$ 85	$ 34	$ 98	$ 64	$ 89	$ 204	$ 204	$ 455	$ 438
Earnings per share - continuing operations
Basic	$ 0.14	$ 0.35	$ 0.49	$ 0.20	$ 0.57	$ 0.38	$ 0.52	$ 1.21	$ 1.17	$ 2.68	$ 2.58
Diluted	$ 0.14	$ 0.34	$ 0.48	$ 0.20	$ 0.57	$ 0.37	$ 0.51	$ 1.21	$ 1.15	$ 2.66	$ 2.57
Earnings per share - discontinued operations
Basic									$ 0.01		$ 0.03
Diluted									$ 0.01		$ 0.02

Employees (Details)	Dec. 31, 2011 Person	Dec. 31, 2010 Person	Dec. 31, 2009 Person
Number of Person employed by the company
Average Number of Employees	17,155	17,101	17,133
Global [Member]
Number of Person employed by the company
Average Number of Employees	4,042	3,931	3,815
North America [Member]
Number of Person employed by the company
Average Number of Employees	6,479	6,710	7,116
International [Member]
Number of Person employed by the company
Average Number of Employees	6,634	6,460	6,202
Total Retail [Member]
Number of Person employed by the company
Average Number of Employees	13,113	13,170	13,318

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Details Textual) (Willis North America, Inc. [Member], USD $) In Millions, unless otherwise specified	Sep. 29, 2009	Mar. 28, 2007	Jul. 01, 2005
Willis North America, Inc. [Member]
Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries [Textual Abstract]
Senior notes, outstanding balance	$ 300	$ 600	$ 350