10-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE QUARTERLY PERIOD ENDED September 30, 2012

OR

oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number 1-7933

Aon plc

(Exact Name of Registrant as Specified in Its Charter)

ENGLAND AND WALES	98-1030901
(State or Other Jurisdiction of	(I.R.S. Employer
Incorporation or Organization)	Identification No.)

8 DEVONSHIRE SQUARE, LONDON, ENGLAND	EC2M 4PL
(Address of Principal Executive Offices)	(Zip Code)

+44 20 7623 5500

(Registrant’s Telephone Number,

Including Area Code)

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  YES  x  NO  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  YES  x  NO  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company.  See definition of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer x	Accelerated filer o
Non-accelerated filer o	Smaller reporting company o
(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  YES o NO x

Number of Class A Ordinary Shares of Aon plc, $0.01 nominal value, outstanding as of September 30, 2012:  318,667,385

Part I Financial Information

ITEM 1. FINANCIAL STATEMENTS

Aon plc

Condensed Consolidated Statements of Income

(Unaudited)

	Three Months Ended						Nine Months Ended
(millions, except share data)	September 30, 2012			September 30, 2011			September 30, 2012			September 30, 2011
Revenue
Commissions, fees and other	$	2,726		$	2,708		$	8,368		$	8,255
Fiduciary investment income	11			15			31			38
Total revenue	2,737			2,723			8,399			8,293
Expenses
Compensation and benefits	1,620			1,634			4,920			4,843
Other general expenses	778			761			2,344			2,284
Total operating expenses	2,398			2,395			7,264			7,127
Operating income	339			328			1,135			1,166
Interest income	1			4			6			14
Interest expense	(57		)	(60		)	(173		)	(186		)
Other (expense) income	(9		)	20			3			6
Income from continuing operations before income taxes	274			292			971			1,000
Income taxes	64			84			257			274
Income from continuing operations	210			208			714			726
(Loss) income from discontinued operations before income taxes	—			—			(1		)	5
Income taxes	—			—			—			1
(Loss) income from discontinued operations	—			—			(1		)	4
Net income	210			208			713			730
Less: Net income attributable to noncontrolling interests	6			10			25			28
Net income attributable to Aon shareholders	$	204		$	198		$	688		$	702
Net income (loss) attributable to Aon shareholders
Income from continuing operations	$	204		$	198		$	689		$	698
(Loss) income from discontinued operations	—			—			(1		)	4
Net income	$	204		$	198		$	688		$	702
Basic net income per share attributable to Aon shareholders
Continuing operations	$	0.62		$	0.59		$	2.08		$	2.07
Discontinued operations	—			—			—			0.01
Net income	$	0.62		$	0.59		$	2.08		$	2.08
Diluted net income per share attributable to Aon shareholders
Continuing operations	$	0.62		$	0.59		$	2.06		$	2.04
Discontinued operations	—			—			—			0.01
Net income	$	0.62		$	0.59		$	2.06		$	2.05
Cash dividends per share paid on ordinary shares	$	0.16		$	0.15		$	0.46		$	0.45
Weighted average ordinary shares outstanding - basic	327.3			332.6			330.6			336.7
Weighted average ordinary shares outstanding - diluted	331.0			336.9			334.4			341.8

See accompanying Notes to the Condensed Consolidated Financial Statements (Unaudited).

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Aon plc

Condensed Consolidated Statements of Comprehensive Income

(Unaudited)

	Three Months Ended					Nine Months Ended
(millions)	September 30, 2012		September 30, 2011			September 30, 2012		September 30, 2011
Net income	$	210	$	208		$	713	$	730
Less: Net income attributable to noncontrolling interests	6		10			25		28
Net income attributable to Aon shareholders	$	204	$	198		$	688	$	702
Other comprehensive income (loss), net of tax:
Change in fair value of derivatives	15		(9		)	5		(14		)
Foreign currency translation adjustments	164		(209		)	71		(12		)
Post-retirement benefit obligation	7		15			46		42
Total other comprehensive income (loss)	186		(203		)	122		16
Less: Other comprehensive income (loss) attributable to noncontrolling interests	4		(1		)	2		(1		)
Total other comprehensive income (loss) attributable to Aon shareholders	182		(202		)	120		17
Comprehensive income (loss) attributable to Aon shareholders	$	386	$	(4	)	$	808	$	719

See accompanying Notes to the Condensed Consolidated Financial Statements (Unaudited).

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Aon plc

Condensed Consolidated Statements of Financial Position

(millions, except par value)	Sept. 30, 2012			Dec. 31, 2011
	(Unaudited)
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	290		$	272
Short-term investments	718			785
Receivables, net	2,959			3,183
Fiduciary assets	11,343			10,838
Other current assets	392			427
Total Current Assets	15,702			15,505
Goodwill	8,856			8,770
Intangible assets, net	3,040			3,276
Fixed assets, net	814			783
Investments	160			239
Other non-current assets	937			979
TOTAL ASSETS	$	29,509		$	29,552
LIABILITIES AND EQUITY
LIABILITIES
CURRENT LIABILITIES
Fiduciary liabilities	$	11,343		$	10,838
Short-term debt and current portion of long-term debt	291			337
Accounts payable and accrued liabilities	1,519			1,832
Other current liabilities	801			753
Total Current Liabilities	13,954			13,760
Long-term debt	4,111			4,155
Pension, other post retirement and other post employment liabilities	1,757			2,192
Other non-current liabilities	1,326			1,325
TOTAL LIABILITIES	21,148			21,432
EQUITY
Ordinary shares (2012 - $0.01 nominal value; 2011 - $1.00 par value) Authorized: 750 shares (issued: 2012 - 318.7; 2011 - 386.4)	3			386
Additional paid-in capital	4,373			4,021
Retained earnings	6,179			8,594
Treasury shares at cost (shares: 2012 - 0; 2011 - 59.6)	—			(2,553		)
Accumulated other comprehensive loss	(2,250		)	(2,370		)
TOTAL AON SHARESHOLDERS’ EQUITY	8,305			8,078
Noncontrolling interests	56			42
TOTAL EQUITY	8,361			8,120
TOTAL LIABILITIES AND EQUITY	$	29,509		$	29,552

See accompanying Notes to the Condensed Consolidated Financial Statements (Unaudited).

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Aon plc

Condensed Consolidated Statement of Shareholders’ Equity

(Unaudited)

(millions)	Shares		Ordinary Shares and Additional Paid-in Capital			Retained Earnings			Treasury Stock			Accumulated Other Comprehensive Loss, Net of Tax			Non- controlling Interests			Total
Balance at December 31, 2011	386.4		$	4,407		$	8,594		$	(2,553	)	$	(2,370	)	$	42		$	8,120
Net income	—		—			688			—			—			25			713
Retirement of treasury shares	(60.0	)	(60		)	(2,412		)	2,472			—			—			—
Shares issued - employee benefit plans	3.0		20			—			—			—			—			20
Shares purchased	(10.7	)	—			(525		)	(100		)	—			—			(625		)
Shares reissued - employee benefit plans	—		(181		)	(13		)	181			—			—			(13		)
Tax benefit - employee benefit plans	—		30			—			—			—			—			30
Share-based compensation expense	—		160			—			—			—			—			160
Dividends to shareholders	—		—			(153		)	—			—			—			(153		)
Change in net derivative gains/losses	—		—			—			—			5			—			5
Net foreign currency translation adjustments	—		—			—			—			69			2			71
Net post-retirement benefit obligation	—		—			—			—			46			—			46
Purchase of subsidiary shares from non-controlling interests	—		—			—			—			—			4			4
Dividends paid to non-controlling interests on subsidiary common stock	—		—			—			—			—			(17		)	(17		)
Balance at September 30, 2012	318.7		$	4,376		$	6,179		$	—		$	(2,250	)	$	56		$	8,361

See accompanying Notes to the Condensed Consolidated Financial Statements (Unaudited).

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Aon plc

Condensed Consolidated Statements of Cash Flows

(Unaudited)

	Nine Months Ended
(millions)	September 30, 2012			September 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	713		$	730
Adjustments to reconcile net income to cash provided by operating activities:
Gain from sales of businesses, net	(1		)	(4		)
Depreciation of fixed assets	168			164
Amortization of intangible assets	313			273
Share-based compensation expense	160			179
Deferred income taxes	21			3
Change in assets and liabilities:
Fiduciary receivables	(447		)	412
Short term investments - funds held on behalf of clients	118			(626		)
Fiduciary liabilities	329			214
Receivables, net	240			(36		)
Accounts payable and accrued liabilities	(347		)	(227		)
Restructuring reserves	(43		)	(68		)
Current income taxes	67			172
Pension and other post employment liabilities	(414		)	(334		)
Other assets and liabilities	(10		)	(65		)
CASH PROVIDED BY OPERATING ACTIVITIES	867			787
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	171			103
Purchases of long-term investments	(9		)	(28		)
Net sales of short-term investments - non-fiduciary	66			176
Acquisition of businesses, net of cash acquired	(97		)	(102		)
Proceeds from sale of businesses	2			9
Capital expenditures	(201		)	(151		)
CASH (USED FOR) PROVIDED BY INVESTING ACTIVITIES	(68		)	7
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(625		)	(828		)
Issuance of shares for employee benefit plans	93			165
Issuance of debt	333			1,572
Repayment of debt	(427		)	(1,523		)
Cash dividends to shareholders	(153		)	(150		)
Purchase of shares from noncontrolling interests	—			(24		)
Dividends paid to noncontrolling interests	(17		)	(21		)
CASH USED FOR FINANCING ACTIVITIES	(796		)	(809		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	15			(36		)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	18			(51		)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	272			346
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	290		$	295
Supplemental disclosures:
Interest paid	$	172		$	216
Income taxes paid, net of refunds	$	139		$	74

See accompanying Notes to the Condensed Consolidated Financial Statements (Unaudited).

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Notes to the Condensed Consolidated Financial Statements (Unaudited)

1.  Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements and Notes thereto have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”).  The Condensed Consolidated Financial Statements include the accounts of Aon plc and all controlled subsidiaries (“Aon” or the “Company”).  All material intercompany accounts and transactions have been eliminated.  The Condensed Consolidated Financial Statements include, in the opinion of management, all adjustments (consisting of normal recurring adjustments and reclassifications) necessary to present fairly the Company’s consolidated financial position, results of operations and cash flows for all periods presented.

Certain information and footnote disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted.  These Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.  The results for the three and nine months ended September 30, 2012 are not necessarily indicative of operating results that may be expected for the full year ending December 31, 2012.

Company Redomestication

On April 2, 2012, the Company completed the reorganization of the corporate structure of the group of companies controlled by its predecessor, Aon Corporation, as holding company of the Aon group, pursuant to which Aon Corporation merged with one of its indirect, wholly-owned subsidiaries and Aon plc became the publicly-held parent company of the Aon group.  This transaction is referred to as the Redomestication.  In the Redomestication, each issued and outstanding share of Aon Corporation common stock held by stockholders of Aon Corporation was converted into the right to receive one Class A Ordinary Share, nominal value $0.01 per share, of Aon plc.  Likewise, equity incentive and compensation plans were assumed by Aon plc and amended to provide that those plans will now provide for the award and issuance of Class A Ordinary Shares instead of shares of common stock of Aon Corporation on a one-for-one basis.  Shares of treasury stock of Aon Corporation were cancelled in the Redomestication.  Any references to “Aon”, “the Company”, “us”, or “we,” or any similar references relating to periods before the Redomestication shall be construed as references to Aon Corporation, being the previous parent company of the Aon group.

Reclassification

Certain amounts in prior year’s Condensed Consolidated Financial Statements and related notes have been reclassified to conform to the 2012 presentation. In prior periods, remeasurement gains and losses from foreign currency transactions and related derivative instruments were recognized in Other general expenses in the Condensed Consolidated Statements of Income. These gains and losses are now included in Other (expense) income in the Condensed Consolidated Statements of Income and disclosed in Note 4 to these Condensed Consolidated Financial Statements. The Company believes this provides greater clarity into the income generated from operations.

Use of Estimates

The preparation of the accompanying unaudited Condensed Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of reserves and expenses. These estimates and assumptions are based on management’s best estimates and judgments.  Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances.  Aon adjusts such estimates and assumptions when facts and circumstances dictate.  Illiquid credit markets, volatile equity markets, and foreign currency movements have combined to increase the uncertainty inherent in such estimates and assumptions.  As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates.  Changes in estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods.

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2.  Accounting Principles and Practices

Changes in Accounting Principles

Indefinite-Lived Intangible Asset Impairment

In July 2012, the Financial Accounting Standards Board (“FASB”) issued guidance on the testing of indefinite-lived intangible assets for impairment that gives an entity the option to perform a qualitative assessment that may eliminate the requirement to perform the annual quantitative test.  The recently issued guidance gives an entity the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a an indefinite-lived intangible asset is less than its carrying amount.  If an entity concludes that this is the case, it must perform the quantitative test.  The guidance is effective for Aon in the first quarter 2013.  The adoption of this guidance is not expected to have a material impact on the Company’s Consolidated Financial Statements.

Goodwill Impairment

In September 2011, the FASB issued final guidance on goodwill impairment that gives an entity the option to perform a qualitative assessment that may eliminate the requirement to perform the annual two-step test.  The two-step test requires an entity to assess goodwill for impairment by quantitatively comparing the fair value of a reporting unit with its carrying amount, including goodwill (Step 1).  If the reporting unit’s fair value is less than its carrying amount, Step 2 of the test must be performed to measure the amount of goodwill impairment, if any.  The guidance gives an entity the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount.  If an entity concludes that this is the case, it must perform the two-step test.  Otherwise, the two-step test is not required.  The Company early adopted this guidance in the fourth quarter 2011.  The adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements.

Comprehensive Income

In June 2011, the FASB issued guidance that updates principles related to the presentation of comprehensive income.  The revised guidance requires companies to present the components of net income and other comprehensive income either as one continuous statement or as two consecutive statements and eliminates the option to present components of other comprehensive income as part of the statement of changes in stockholders’ equity.  The guidance, which must be applied retroactively, was effective for Aon beginning in the first quarter of 2012.  The adoption of this guidance affects only the presentation of these Condensed Consolidated Financial Statements, and had no effect on the financial condition, results of operations or cash flows of the Company.

Fair Value Measurement

In May 2011, the FASB issued guidance that clarifies the application of existing fair value measurements and disclosures, and changes certain principles or requirements for fair value measurements and disclosures. The additional required disclosures include quantitative information, sensitivity discussion, and description of the valuation process, as well as increased disclosure of unobservable inputs that are significant to the fair value measurement and transfers between Level 1 and Level 2.  The guidance is effective for Aon beginning in the first quarter 2012.  The adoption of this guidance did not have a material impact on the Company’s financial statements.

3.  Cash and Cash Equivalents

Cash and cash equivalents include cash balances and all highly liquid investments with initial maturities of three months or less.  Short-term investments include certificates of deposit, money market funds and highly liquid debt instruments purchased with initial maturities in excess of three months but less than one year and are carried at amortized cost, which approximates fair value.

The Company is required to hold £77 million of operating funds in the U.K. as required by the Financial Services Authority, which were included in Short-term investments.  These operating funds, when translated to U.S. dollars, were $124 million and $120 million at September 30, 2012 and December 31, 2011, respectively.  Cash and cash equivalents included restricted balances of $88 million and $71 million at September 30, 2012 and December 31, 2011 respectively.

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4.  Other (Expense) Income

Other (expense) income consists of the following (in millions):

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Equity earnings	$	—		$	5		$	8		$	9
Realized gain on sale of investments	9			1			11			10
Foreign currency remeasurement (losses) gains	(24		)	24			(24		)	18
Hedging gains (losses)	8			(11		)	8			(13		)
Loss on extinguishment of debt	—			—			—			(19		)
Other	(2		)	1			—			1
	$	(9	)	$	20		$	3		$	6

5.  Acquisitions and Dispositions

Acquisitions

During the nine months ended September 30, 2012, the Company completed the acquisition of two businesses in the HR Solutions segment and four businesses in the Risk Solutions segment.  During the nine months ended September 30, 2011, the Company completed the acquisition of one business in the HR Solutions segment and two businesses in the Risk Solutions segment.

The following table includes the aggregate consideration transferred and the preliminary value of intangible assets recorded as a result of the Company’s acquisitions.

	Nine months ended September 30,
(millions)	2012		2011
Consideration	$	110	$	100
Intangible assets:
Goodwill	$	60	$	58
Other intangible assets	56		29
	$	116	$	87

The results of operations of these acquisitions are included in the Condensed Consolidated Financial Statements as of the acquisition date.  The results of operations of the Company would not have been materially different if these acquisitions had been reported from the beginning of the period.

Dispositions — Continuing Operations

During the nine months ended September 30, 2012, the Company completed the sale of two businesses in the Risk Solutions segment and one business in the HR Solutions segment.  A pretax gain of $1 million was recognized on these sales, which is included in Other (expense) income in the Condensed Consolidated Statements of Income. During the nine months ended September 30, 2011, the Company completed the sale of two businesses in the Risk Solutions segment.  A pretax loss of $2 million was recognized on these sales, which is included in Other (expense) income in the Condensed Consolidated Statements of Income.

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6.  Goodwill and Other Intangible Assets

The change in the net carrying amount of goodwill by operating segment for the nine months ended September 30, 2012 is as follows (in millions):

	Risk Solutions			HR Solutions			Total
Balance as of December 31, 2011	$	5,557		$	3,213		$	8,770
Goodwill related to current year acquisitions	55			5			60
Goodwill related to other prior year acquisitions	(6		)	—			(6		)
Transfer related to Health and Benefits Consulting (1)	313			(313		)	—
Foreign currency translation	18			14			32
Balance as of September 30, 2012	$	5,937		$	2,919		$	8,856

(1)Effective January 1, 2012, the Health and Benefits Consulting business was transferred from the HR Solutions segment to the Risk Solutions segment.

Other intangible assets by asset class are as follows (in millions):

	September 30, 2012						December 31, 2011
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Intangible assets with indefinite lives:
Trademarks	$	1,024	$	—	$	1,024	$	1,024	$	—	$	1,024
Intangible assets with finite lives:
Trademarks	6		2		4		4		1		3
Customer related and contract based	2,671		874		1,797		2,608		615		1,993
Marketing, technology and other	609		394		215		606		350		256
	$	4,310	$	1,270	$	3,040	$	4,242	$	966	$	3,276

Amortization expense from finite lived intangible assets was $105 million and $313 million for the three and nine months ended September 30, 2012, respectively.  Amortization expense from finite lived intangible assets was $91 million and $273 million for the three and nine months ended September 30, 2011, respectively.

The estimated future amortization for intangible assets as of September 30, 2012 is as follows (in millions):

	HR Solutions		Risk Solutions		Total
Remainder of 2012	$	76	$	32	$	108
2013	278		112		390
2014	240		96		336
2015	210		82		292
2016	175		70		245
Thereafter	478		167		645
	$	1,457	$	559	$	2,016

7.  Restructuring

Aon Hewitt Restructuring Plan

On October 14, 2010, Aon announced a global restructuring plan (“Aon Hewitt Plan”) in connection with the acquisition of Hewitt Associates, Inc.  The Aon Hewitt Plan is intended to streamline operations across the combined Aon Hewitt organization and includes approximately 2,000 job eliminations. The Company expects these restructuring activities and related expenses to affect continuing operations into 2013.  The Aon Hewitt Plan is expected to result in cumulative costs of approximately $325 million through the end of the plan, consisting of approximately $180 million in employee termination costs and approximately $145 million in real estate rationalization costs across the Company.

From the inception of the Aon Hewitt Plan through September 30, 2012, in excess of 1,800 jobs have been eliminated and total expenses of $214 million have been incurred.  The Company recorded $32 million and $57 million of restructuring and related charges in the three and nine months ended September 30, 2012, respectively.  The Company recorded $26 million and $80 million of

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restructuring and related charges in the three and nine months ended September 30, 2011, respectively.  Charges related to the restructuring are included in Compensation and benefits and Other general expenses in the accompanying Condensed Consolidated Statements of Income.

The following summarizes restructuring and related costs by type that have been incurred and are estimated to be incurred through the end of the restructuring initiative related to the Aon Hewitt Plan (in millions):

	2010		2011		Third Quarter 2012		Nine Months 2012		Total Inception to Date		Estimated Total Cost for Restructuring Plan (1)
Workforce reduction	$	49	$	64	$	25	$	44	$	157	$	180
Lease consolidation	3		32		6		11		46		95
Asset impairments	—		7		—		1		8		47
Other costs associated with restructuring (2)	—		2		1		1		3		3
Total restructuring and related expenses	$	52	$	105	$	32	$	57	$	214	$	325

(1)Actual costs, when incurred, will vary due to changes in the assumptions built into this plan.  Significant assumptions likely to change when plans are finalized and implemented include, but are not limited to, changes in severance calculations, changes in the assumptions underlying sublease loss calculations due to changing market conditions, and changes in the overall analysis that might cause the Company to add or cancel component initiatives.

(2)Other costs associated with restructuring initiatives, including moving costs and consulting and legal fees, are recognized when incurred.

Effective January 1, 2012, the Health and Benefits Consulting business was transferred from the HR Solutions segment to the Risk Solutions segment.  Restructuring costs associated with the Health and Benefits Consulting business are reflected in the Risk Solutions segment, including $41 million that was reclassified from the HR Solutions segment to the Risk Solutions segment for 2011.  During the third quarter 2011, $26 million in restructuring expenses were recorded, $14 million of which related to the Health and Benefits Consulting business.  The following summarizes the restructuring and related expenses, by segment, that have been incurred and are estimated to be incurred through the end of the restructuring initiative related to the Aon Hewitt Plan (in millions):

	2010		2011		Third Quarter 2012		Nine Months 2012		Total Inception to Date		Estimated Total Cost for Restructuring Plan
HR Solutions	$	52	$	49	$	16	$	36	$	137	$	243
Risk Solutions	—		56		16		21		77		82
Total restructuring and related expenses	$	52	$	105	$	32	$	57	$	214	$	325

Aon Benfield Restructuring Plan

The Company announced a global restructuring plan (“Aon Benfield Plan”) in conjunction with its acquisition of Benfield in 2008.  The Aon Benfield Plan was intended to integrate and streamline operations across the combined Aon Benfield organization.  The Aon Benfield Plan included 810 job eliminations. Additionally, duplicate space and assets were abandoned. The Company incurred all remaining costs for the Aon Benfield Plan and the plan was closed in the first quarter 2012.

The Company recorded $8 million of restructuring and related charges in the nine months ended September 30, 2012.  The Company recorded $3 million of restructuring and related charges in the three months ended September 30, 2011, and a net restructuring benefit of $2 million in the nine months ended September 30, 2011. All costs associated with the Aon Benfield Plan are included in the Risk Solutions segment. Charges related to the restructuring are included in Compensation and benefits and Other general expenses in the accompanying Condensed Consolidated Statements of Income.

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The following summarizes the restructuring and related costs by type that have been incurred through the end of the restructuring initiative related to the Aon Benfield Plan (in millions):

	Purchase Price Allocation		2009		2010		2011			Third Quarter 2012		Nine Months 2012		Inception to Date		Total Cost for Restructuring Plan
Workforce reduction	$	32	$	38	$	15	$	33		$	—	$	8	$	126	$	126
Lease consolidation	20		14		7		(15		)	—		—		26		26
Asset impairments	—		2		2		—			—		—		4		4
Other costs associated with restructuring	1		1		2		1			—		—		5		5
Total restructuring and related expenses	$	53	$	55	$	26	$	19		$	—	$	8	$	161	$	161

As of September 30, 2012, the Company’s liabilities for its restructuring plans are as follows (in millions):

	Aon Hewitt Plan			Aon Benfield Plan			2007 Plan			Other			Total
Balance at December 31, 2011	$	95		$	20		$	50		$	8		$	173
Expensed	56			8			—			—			64
Cash payments	(71		)	(20		)	(15		)	(3		)	(109		)
Foreign exchange translation and other	—			1			2			—			3
Balance at September 30, 2012	$	80		$	9		$	37		$	5		$	131

8.  Investments

The Company earns income on cash balances and investments, as well as on premium trust balances that the Company maintains for premiums collected from insureds but not yet remitted to insurance companies, and funds held under the terms of certain outsourcing agreements to pay certain obligations on behalf of clients.  Premium trust balances and a corresponding liability are included in Fiduciary assets and Fiduciary liabilities in the accompanying Condensed Consolidated Statements of Financial Position.

The Company’s interest-bearing assets and other investments are included in the following categories in the Condensed Consolidated Statements of Financial Position (in millions):

	September 30,		December 31,
	2012		2011
Cash and cash equivalents	$	290	$	272
Short-term investments	718		785
Fiduciary assets (1)	4,147		4,190
Investments	160		239
	$	5,315	$	5,486

(1)  Fiduciary assets include funds held on behalf of clients but does not include fiduciary receivables.

The Company’s investments are as follows (in millions):

	September 30,		December 31,
	2012		2011
Equity method investments (2)	$	103	$	164
Other investments, at cost	39		60
Fixed-maturity securities	18		15
	$	160	$	239

(2)  The reduction in equity method investments is primarily due to redemptions.

9.  Debt

The Company uses proceeds from the commercial paper market from time to time in order to meet short-term working capital needs.  At September 30, 2012, the Company had no commercial paper outstanding when compared to the $50 million of commercial paper outstanding at December 31, 2011.  The weighted average commercial paper outstanding for the three and nine months ended September 30, 2012 was $15 million and $41 million, respectively.  The weighted average interest rate of the commercial paper outstanding for the three and nine months ended September 30, 2012 was 0.52% and 0.51%, respectively.

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On March 20, 2012, the Company entered into a $400 million five year credit agreement (“Revolving Credit Agreement”).  Borrowings under the Revolving Credit Agreement will bear interest, at the Company’s option, at a rate equal to either (a) the rate for eurodollar deposits as reflected on the applicable Reuters LIBOR01 page for the interest period relevant to such borrowing (“Eurodollar Rate”), plus the applicable margin or (b) the highest of (i) the rate of interest publicly announced by Citibank as its prime rate, (ii) the federal funds effective rate from time to time plus 0.5% and (iii) the one month Eurodollar rate plus 1.0%, in each case plus the applicable margin.  The applicable margin for borrowings under the Revolving Credit Agreement may change depending on achievement of certain public debt ratings.  The Revolving Credit Agreement has a maturity date of March 20, 2017 and contains covenants with respect to the ratio of consolidated funded debt to consolidated adjusted EBITDA (which may not be more than the lower of (a) 3.25 to 1.00 or (b) the greater of (i) 3.00 to 1.00 or (ii) the lowest ratio of consolidated funded debt to consolidated adjusted EBITDA then set forth in certain of Aon’s other credit facilities), as well as other customary covenants, undertakings and events of default.  In conjunction with the Company entering into the Revolving Credit Agreement, the prior revolving credit agreement dated December 4, 2009 was terminated.  There were no borrowings on the Revolving Credit Agreement at September 30, 2012.  On April 2, 2012, in connection with the Redomestication, Aon plc became party to the Revolving Credit Agreement and guaranteed the obligations of Aon Corporation thereunder.  The Company was in compliance with all debt covenants as of September 30, 2012.

10.  Shareholders’ Equity

Redomestication

Prior to the Redomestication, the Company accounted for purchases of its outstanding common stock using the treasury stock method included in U.S. GAAP. Under this method, the Company recorded purchases of its own outstanding common stock as a reduction to Additional paid-in capital based on the cost of the shares acquired. Under U.K. law, when the Company repurchases its outstanding shares, those shares are treated as cancelled. In April 2012, the Company constructively cancelled 60 million shares of treasury stock related to the Redomestication. The impact of the cancellation of all outstanding treasury shares was a decrease in Ordinary shares and Retained earnings of $60 million and $2.4 billion, respectively. The balance of Treasury stock at cost of $2.5 billion was also eliminated as part of the cancellation. Additionally, effective upon the completion of the Redomestication, the par value of Aon’s outstanding equity shares decreased from $1.00 to $0.01. The impact of this change was a decrease in Ordinary shares of $323 million, and an increase in Additional paid-in capital of $323 million.

As a U.K. incorporated company, Aon plc must have “distributable reserves” to repurchase shares or pay dividends to shareholders. Distributable reserves may be created through the earnings of the U.K. parent company and, amongst other methods, through a reduction in share capital approved by the English Companies Court. Distributable reserves are not linked to a U.S. GAAP reported amount. On April 4, 2012, the Company received approval from the English Companies Court to reduce its share premium and in connection with that approval, recognized distributable reserves in the amount of $8 billion.

Ordinary Shares

In January 2010, the Company’s Board of Directors authorized a share repurchase program under which up to $2.0 billion of common stock may be repurchased (“2010 Share Repurchase Program”).  Shares could be repurchased through the open market or in privately negotiated transactions, including structured repurchase programs, from time to time, based on prevailing market conditions, and were to be funded from available capital.  Any repurchased shares were to be available for employee stock plans and for other corporate purposes.

During the three months ended March 31, 2012, the Company repurchased 2.1 million shares at an average price per share of $48.32 for a total cost of $100 million under the 2010 Share Repurchase Program.  Since the inception of the 2010 Share Repurchase Program, the Company repurchased a total of 18.2 million shares for an aggregate cost of $913 million as of March 31, 2012.

The 2010 Share Repurchase Program, which related to common stock of Aon Corporation and preceded the Redomestication, did not extend to shares of Aon plc. In April 2012, the Company’s Board of Directors therefore authorized a share repurchase program under which up to $5.0 billion of Class A ordinary shares may be repurchased (“2012 Share Repurchase Program”). Under this program, shares may be repurchased through the open market or in privately negotiated transactions, from time to time, based on prevailing market conditions, and will be funded from available capital.

During the three months ended September 30, 2012, the Company repurchased 5.4 million shares at an average price per share of $51.37 for a total cost of $275 million.  During the nine months ended September 30, 2012, the Company repurchased 12.7 million

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shares at an average price per share of $49.22 for a total cost of $625 million under the 2012 Share Repurchase Program and the previously completed 2010 Share Repurchase Program.  The remaining authorized amount for share repurchase under the 2012 Share Repurchase Program is $4.5 billion.

Participating Securities

Unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents, whether paid or unpaid, are participating securities, as defined, and therefore, should be included in computing basic and diluted earnings per share using the two class method.  Certain of the Company’s restricted share awards allow the holder to receive a non-forfeitable dividend equivalent.

Income from continuing operations, Income from discontinued operations and Net income, attributable to participating securities, were as follows (in millions):

	Three months ended September 30,				Nine months ended September 30,
	2012		2011		2012		2011
Income from continuing operations	$	2	$	3	$	8	$	11
Income from discontinued operations	—		—		—		—
Net income	$	2	$	3	$	8	$	11

Weighted average shares outstanding are as follows (in millions):

	Three months ended September 30,		Nine months ended September 30,
	2012	2011	2012	2011
Shares for basic earnings per share (1)	327.3	332.6	330.6	336.7
Common stock equivalents	3.7	4.3	3.8	5.1
Shares for diluted earnings per share	331.0	336.9	334.4	341.8

(1)  Includes 4.5 million and 5.2 million of participating securities for the three months ended September 30, 2012 and 2011, respectively, and 4.7 million and 5.5 million of participating securities for the nine months ended September 30, 2012 and 2011, respectively.

Certain ordinary share equivalents, primarily related to options, were not included in the computation of diluted net income per share because their inclusion would have been antidilutive.  The number of shares excluded from the calculation was 0.1 million and 1.0 million for the three months ended September 30, 2012 and 2011, respectively, and 0.1 million and 0.1 million for the nine months ended September 30, 2012 and 2011, respectively.

Accumulated Other Comprehensive Loss

The components of Accumulated other comprehensive loss, net of related tax, are as follows (in millions):

	September 30, 2012			December 31, 2011
Net derivative losses	$	(32	)	$	(37	)
Net foreign exchange translation adjustments	193			124
Net postretirement benefit obligations	(2,411		)	(2,457		)
Accumulated other comprehensive loss, net of tax	$	(2,250	)	$	(2,370	)

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11.  Employee Benefits

The following table provides the components of the net periodic benefit cost for Aon’s U.S. pension plans, along with its most significant international pension plans, which are located in the U.K., the Netherlands, and Canada (in millions):

	Three months ended September 30,
	U.S.						International
	2012			2011			2012			2011
Service cost	$	—		$	—		$	4		$	5
Interest cost	29			31			66			67
Expected return on plan assets	(31		)	(30		)	(80		)	(73		)
Amortization of net actuarial loss	10			8			15			14
Net periodic benefit cost	$	8		$	9		$	5		$	13

	Nine months ended September 30,
	U.S.						International
	2012			2011			2012			2011
Service cost	$	—		$	—		$	12		$	15
Interest cost	89			92			198			201
Expected return on plan assets	(95		)	(90		)	(241		)	(217		)
Amortization of net actuarial loss	32			23			44			41
Net periodic benefit cost	$	26		$	25		$	13		$	40

Based on current assumptions, in 2012, Aon plans to contribute $226 million and $415 million to its U.S. and most significant international defined benefit pension plans, respectively.  During the nine months ended September 30, 2012, contributions of $195 million were made to the Company’s U.S. pension plans and $259 million were made to its most significant international pension plans. On September 30, 2012, the Company completed a merger of five of the seven legacy Aon and Hewitt UK pension plans into one single plan. In addition to decreasing management time and improving governance, additional benefits are expected to be derived through improved operational efficiencies, reduced advisor and asset manager costs, and a higher level of control over investments. In connection with this transaction, on October 1, 2012, the Company made a discretionary contribution of approximately $80 million.

12.  Share-Based Compensation Plans

The following table summarizes share-based compensation expense recognized in the Condensed Consolidated Statements of Income in Compensation and benefits (in millions):

	Three months ended				Nine months ended
	September 30,				September 30,
	2012		2011		2012		2011
Restricted stock units (“RSUs”)	$	37	$	31	$	120	$	108
Performance share awards (“PSAs”)	15		24		30		59
Stock options	1		2		4		7
Employee stock purchase plans	2		2		6		5
Total stock-based compensation expense	$	55	$	59	$	160	$	179

Share Awards

A summary of the status of the Company’s RSUs is as follows (shares in thousands):

	Nine months ended September 30,
	2012				2011
	Shares		Fair Value (1)		Shares		Fair Value (1)
Non-vested at beginning of period	9,916		$	42	10,674		$	38
Granted	4,888		46		3,366		51
Vested	(3,343	)	42		(3,385	)	39
Forfeited	(516	)	44		(410	)	39
Non-vested at end of period	10,945		44		10,245		42

(1) Represents per share weighted average fair value of award at date of grant

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Information as of September 30, 2012 regarding the Company’s PSAs granted during the nine months ended September 30, 2012 and the years ended December 31, 2011 and 2010, respectively, is as follows (shares in thousands, dollars in millions, except fair value):

	As of September 30, 2012		As of December 31, 2011		As of December 31, 2010
Target PSAs granted	1,369		1,715		1,390
Fair value (1)	$	47	$	50	$	39
Number of shares that would be issued based on current performance levels	1,367		1,131		1,241
Unamortized expense, based on current performance levels	$	52	$	25	$	4

(1) Represents per share weighted average fair value of award at date of grant.

Share Options

In connection with its incentive compensation plans, the Company did not grant any share options in the nine months ended September 30, 2012.  During the nine months ended September 30, 2011, the Company granted 80,000 share options at a weighted average exercise price of $53 per share.  The weighted average volatility, expected dividend yield and risk-free rate assumed related to those options were 26.1%, 1.3% and 2.2%, respectively.  The weighted average expected life was 5.5 years, and the weighted average estimated fair value per share was $10.92.

A summary of the status of the Company’s share options and related information is as follows (shares in thousands):

	Nine months ended September 30,
	2012				2011
	Shares		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
Beginning outstanding	9,116		$	32	13,919		$	32
Granted	—		—		80		53
Exercised	(2,570	)	31		(3,781	)	32
Forfeited and expired	(67	)	37		(300	)	37
Outstanding at end of period	6,479		32		9,918		32
Exercisable at end of period	5,969		31		8,566		30

The weighted average remaining contractual life, in years, of outstanding options was 2.8 years and 3.3 years at September 30, 2012 and 2011, respectively.

The aggregate intrinsic value represents the total pretax intrinsic value, based on options with an exercise price less than the Company’s closing stock price of $52.29 as of September 30, 2012, which would have been received by the option holders had those option holders exercised their options as of that date.  At September 30, 2012, the aggregate intrinsic value of options outstanding was $131 million, of which $125 million was exercisable.

Other information related to the Company’s share options is as follows (in millions):

	Three months ended				Nine months ended
	September 30,				September 30,
	2012		2011		2012		2011
Aggregate intrinsic value of stock options exercised	$	23	$	4	$	47	$	69
Cash received from the exercise of stock options	29		8		80		129
Tax benefit realized from the exercise of stock options	5		—		8		12

Unamortized deferred compensation expense, which includes both options and awards, amounted to $329 million as of September 30, 2012, with a remaining weighted-average amortization period of approximately 2.1 years.

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13.  Derivatives and Hedging

The Company is exposed to market risks, including changes in foreign currency exchange rates and interest rates.  To manage the risk related to these exposures, the Company enters into various derivative instruments that reduce these market risks by creating offsetting exposures.  The Company does not enter into derivative transactions for trading or speculative purposes.

Foreign Exchange Risk Management

The Company is exposed to foreign exchange risk when it receives revenues, pays expenses, or enters into intercompany loans denominated in a currency that differs from its functional currency.  The Company uses foreign exchange derivatives, typically forward contracts, options and cross currency swaps, to reduce its overall exposure to the effects of currency fluctuations on cash flows.  These exposures are hedged, on average, for less than two years; however, in limited instances, the Company has hedged certain exposures up to five years in the future.

The Company also uses foreign exchange derivatives, typically forward contracts and options, to hedge its net investments in foreign operations for up to two years in the future.

The Company also uses foreign exchange derivatives, typically forward contracts and options, to manage the currency exposure of the Company’s global liquidity profile for up to one year in the future. These derivatives are not accounted for as hedges, and changes in fair value are recorded each period in Other (expense) income in the Condensed Consolidated Statements of Income.

Interest Rate Risk Management

The Company holds variable-rate short-term brokerage and other operating deposits. The Company uses interest rate derivatives, typically swaps, to reduce its exposure to the effects of interest rate fluctuations on the forecasted interest receipts from these deposits for up to two years in the future.

Certain derivatives also give rise to credit risks from the possible non-performance by counterparties.  The credit risk is generally limited to the fair value of those contracts that are favorable to the Company.  The Company has limited its credit risk by using International Swaps and Derivatives Association (“ISDA”) master agreements, collateral and credit support arrangements, entering into non-exchange-traded derivatives with highly-rated major financial institutions and by using exchange-traded instruments.  The Company monitors the credit worthiness of, and exposure to, its counterparties.  As of September 30, 2012, all net derivative positions were free of credit risk contingent features.  The Company has not received or pledged any collateral as of September 30, 2012.

The notional and fair values of derivative instruments are as follows (in millions):

	Notional Amount				Derivative Assets (1)				Derivative Liabilities (2)
	September 30, 2012		December 31, 2011		September 30, 2012		December 31, 2011		September 30, 2012		December 31, 2011
Derivatives accounted for as hedges:
Interest rate contracts	$	342	$	702	$	16	$	16	$	—	$	—
Foreign exchange contracts	1,224		1,297		224		140		283		188
Total	1,566		1,999		240		156		283		188
Derivatives not accounted for as hedges:
Foreign exchange contracts	187		246		2		1		1		1
Total	$	1,753	$	2,245	$	242	$	157	$	284	$	189

(1) Included within Other current assets or Other non-current assets

(2) Included within Other current liabilities or Other non-current liabilities

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The amounts of derivative gains (losses) recognized in the Condensed Consolidated Financial Statements for the three and nine months ended September 30, 2012 and 2011 are as follows (in millions):

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Gain (Loss) recognized in Accumulated Other Comprehensive Loss:
Cash Flow Hedges:
Interest rate contracts (1)	$	—		$	1		$	—		$	(1	)
Foreign exchange contracts (2)	16			(10		)	(14		)	(31		)
Total	16			(9		)	(14		)	(32		)
Foreign Net Investment Hedges:
Foreign exchange contracts	$	3		$	13		$	4		$	(4	)
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):
Cash Flow Hedges:
Interest rate contracts (1)	$	—		$	—		$	—		$	1
Foreign exchange contracts (2)	(7		)	3			(23		)	(12		)
Total	(7		)	3			(23		)	(11		)
Foreign Net Investment Hedges:
Foreign exchange contracts	$	—		$	—		$	—		$	—

(1) Included within Fiduciary investment income and Interest expense

(2) Included within Other (expense) income and Interest expense

	Three months ended September 30,						Nine months ended September 30,
	Amount of Gain (Loss) Recognized in Income on Derivative (1)			Amount of Gain (Loss) Recognized in Income on Related Hedge Item (2)			Amount of Gain (Loss) Recognized in Income on Derivative (1)		Amount of Gain (Loss) Recognized in Income on Related Hedge Item (2)
	2012		2011	2012	2011		2012	2011	2012	2011
Fair value hedges:
Foreign exchange contracts	(3	)	2	3	(3	)	—	—	—	1

(1) Relates to fixed rate debt

(2) Included in Interest expense

It is estimated that approximately $18 million of pretax losses currently included within Accumulated other comprehensive loss will be reclassified into earnings in the next twelve months.

The amount of gain (loss) recognized in income on the ineffective portion of derivatives for the three and nine months ended September 30, 2012 and 2011 was not material.

During the three and nine months ended September 30, 2012, the Company recorded a gain of $6 million and $12 million, respectively, in Other (expense) income for foreign exchange derivatives not designated or qualifying as hedges.  During the three and nine months ended September 30, 2011, the Company recorded a loss of $9 million in each period, in Other (expense) income for foreign exchange derivatives not designated or qualifying as hedges.

14.  Fair Value and Financial Instruments

Accounting standards establish a three tier fair value hierarchy that prioritizes the inputs used in measuring fair values as follows:

·Level 1 — observable inputs such as quoted prices for identical assets in active markets;

·Level 2 — inputs other than quoted prices for identical assets in active markets, that are observable either directly or indirectly; and

·Level 3 — unobservable inputs in which there is little or no market data which requires the use of valuation techniques and the development of assumptions.

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The following methods and assumptions are used to estimate the fair values of the Company’s financial instruments:

Money market funds and highly liquid debt securities are carried at cost and amortized cost, respectively, as an approximation of fair value. Based on market convention, the Company considers cost a practical and expedient measure of fair value.

Cash, cash equivalents, and highly liquid debt instruments consist of cash and institutional short-term investment funds. The Company independently reviews the short-term investment funds to obtain reasonable assurance the fund net asset value is $1 per share.

Equity investments consist of domestic and international equity securities and exchange traded equity derivatives valued using the closing stock price on a national securities exchange. Over the counter equity derivatives are valued using observable inputs such as underlying prices of the equity security and volatility. The Company independently reviews the listing of Level 1 equity securities in the portfolio and agrees the closing stock prices to a national securities exchange, and on a sample basis, independently verifies the observable inputs for Level 2 equity derivatives and securities.

Fixed income investments consist of certain categories of bonds and derivatives. Corporate, government, and agency bonds are valued by pricing vendors who estimate fair value using recently executed transactions and proprietary models based on observable inputs, such as interest rate spreads, yield curves and credit risk. Asset-backed securities are valued by pricing vendors who estimate fair value using discounted cash flow models utilizing observable inputs based on trade and quote activity of securities with similar features. Fixed income derivatives are valued by pricing vendors using observable inputs such as interest rates and yield curves. The Company obtains a detailed understanding of the models, inputs, and assumptions used in developing prices provided by its vendors. This understanding includes discussions with valuation resources at the vendor. During these discussions, the Company uses a fair value measurement questionnaire, which is part of the Company’s internal controls over financial reporting, to obtain the information necessary to assert the model, inputs and assumptions used comply with U.S. GAAP, including disclosure requirements. The Company also obtains observable inputs from the pricing vendor and independently verifies the observable inputs, as well as assesses assumptions used for reasonableness based on relevant market conditions and internal Company guidelines. If an assumption is deemed unreasonable, based on the Company’s guidelines, it is then reviewed by a member of management and the fair value estimate provided by the vendor is adjusted, if deemed appropriate. These adjustments do not occur frequently and have not historically been material to the fair value estimates used in the Condensed Consolidated Financial Statements.

Pooled funds consist of various equity, fixed income, commodity, and real estate mutual fund type investment vehicles. Pooled investment funds fair value is estimated based on the proportionate share ownership in the underlying net assets of the investment, which is based on the fair value of the underlying securities that trade on a national securities exchange. Where possible, the Company independently reviews the listing securities in the portfolio and agrees the closing stock prices to a national securities exchange. The Company gains an understanding of the investment guidelines and valuation policies of the fund and discusses fund performance with pooled fund managers. The Company obtains audited fund manager financial statements, when available. If the pooled fund is designed to replicate a publicly traded index, the Company compares the performance of the fund to the index to assess the reasonableness of the fair value measurement.

Alternative investments consist of limited partnerships, private equity and hedge funds. Alternative investment fair value is generally estimated based on the proportionate share ownership in the underlying net assets of the investment as determined by the general partner or investment manager. The valuations are based on various factors depending on investment strategy, proprietary models, and specific financial data or projections. The Company obtains audited fund manager financial statements, when available. The Company obtains a detailed understanding of the models, inputs and assumptions used in developing prices provided by the investment managers (or appropriate party) through regular discussions. During these discussions with the investment managers, the Company uses a fair value measurement questionnaire, which is part of the Company’s internal controls over financial reporting, to obtain the information necessary to assert the model, inputs and assumptions used comply with U.S. GAAP, including disclosure requirements. The Company also obtains observable inputs from the investment manager and independently verifies the observable inputs, as well as assesses assumptions used for reasonableness based on relevant market conditions and internal Company guidelines. If an assumption is deemed unreasonable, based on the Company’s guidelines, it is then reviewed by a member of management and the fair value estimate provided by the vendor is adjusted, if deemed appropriate. These adjustments do not occur frequently and have not historically been material to the fair value estimates in the Condensed Consolidated Financial Statements.

Derivatives are carried at fair value, based upon industry standard valuation techniques that use, where possible, current market-based or independently sourced pricing inputs, such as interest rates, currency exchange rates, or implied volatilities.

Annuity contracts consist of insurance group annuity contracts purchased to match the pension benefit payment stream owed to certain selected plan participant demographics within a few major United Kingdom defined benefit plans. Annuity contracts are valued using a discounted cash flow model utilizing assumptions such as discount rate, mortality, and inflation. The Company independently verifies the observable inputs.

Real estate and REITs consist of publicly traded REITs and direct real estate investments. Level 1 REITs are valued using the closing stock price on a national securities exchange. The Level 3 values are based on the proportionate share of ownership in the underlying

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net asset value as determined by the investment manager. The Company independently reviews the listing of Level 1 REIT securities in the portfolio and agrees the closing stock prices to a national securities exchange. The Company gains an understanding of the investment guidelines and valuation policies of the Level 3 real estate funds and discusses performance with the fund managers. The Company obtains audited fund manager financial statements, when available. See the description of “Alternative Investments” for further detail on valuation procedures surrounding Level 3 REITs.

Guarantees are carried at fair value, which is based on discounted estimated cash flows using published historical cumulative default rates and discount rates commensurate with the underlying exposure.

Debt is carried at outstanding principal balance, less any unamortized discount or premium. Fair value is based on quoted market prices or estimates using discounted cash flow analyses based on current borrowing rates for similar types of borrowing arrangements.

The following tables present the categorization of the Company’s assets and liabilities that are measured at fair value on a recurring basis at September 30, 2012 and December 31, 2011 (in millions):

			Fair Value Measurements Using
			Quoted Prices in		Significant		Significant
			Active Markets		Other		Unobservable
	Balance at		for Identical		Observable		Inputs
	September 30, 2012		Assets (Level 1)		Inputs (Level 2)		(Level 3)
Assets:
Money market funds and highly liquid debt securities (1)	$	2,612	$	2,587	$	25	$	—
Other investments
Fixed maturity securities
Corporate bonds	12		—		—		12
Government bonds	6		—		6		—
Derivatives
Interest rate contracts	16		—		16		—
Foreign exchange contracts	226		—		226		—
Liabilities:
Derivatives
Foreign exchange contracts	284		—		284		—

(1)  Includes $2,587 million of money market funds and $25 million of highly liquid debt securities that are classified as Fiduciary assets, Short-term investments or Cash and cash equivalents in the Condensed Consolidated Statements of Financial Position, depending on their nature and initial maturity.  See Note 8 “Investments” for additional information regarding the Company’s investments.

			Fair Value Measurements Using
			Quoted Prices in		Significant		Significant
			Active Markets		Other		Unobservable
	Balance at		for Identical		Observable		Inputs
	December 31, 2011		Assets (Level 1)		Inputs (Level 2)		(Level 3)
Assets:
Money market funds and highly liquid debt securities (1)	$	2,428	$	2,403	$	25	$	—
Other investments
Fixed maturity securities
Corporate bonds	12		—		—		12
Government Bonds	3		—		3		—
Derivatives
Interest rate contracts	16		—		16		—
Foreign exchange contracts	141		—		141		—
Liabilities:
Derivatives
Foreign exchange contracts	189		—		189		—

(1)  Includes $2,403 million of money market funds and $25 million of highly liquid debt securities that are classified as Fiduciary assets, Short-term investments or Cash and cash equivalents in the Condensed Consolidated Statements of Financial Position,

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depending on their nature and initial maturity.  See Note 8 “Investments” for additional information regarding the Company’s investments.

There were no transfers of assets or liabilities between fair value hierarchy levels during either the three or nine months ended September 30, 2012 and 2011. There were no realized or unrealized gains or losses recognized in the Condensed Consolidated Statements of Income during either the three or nine months ended September 30, 2012 and 2011, related to assets and liabilities measured at fair value using unobservable inputs.

The fair value of all long-term debt instruments is classified as Level 2. The following table discloses the Company’s financial instruments where the carrying amounts and fair values differ (in millions):

	September 30, 2012				December 31, 2011
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value
Long-term debt	$	4,111	$	4,618	$	4,155	$	4,494

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15.  Commitments and Contingencies

Legal

Aon and its subsidiaries are subject to numerous claims, tax assessments, lawsuits and proceedings that arise in the ordinary course of business, which frequently include errors and omissions (“E&O”) claims. The damages claimed in these matters are or may be substantial, including, in many instances, claims for punitive, treble or extraordinary damages. Aon has historically purchased E&O insurance and other insurance to provide protection against certain losses that arise in such matters. Aon has exhausted or materially depleted its coverage under some of the policies that protect the Company and, consequently, is self-insured or materially self-insured for some historical claims. Accruals for these exposures, and related insurance receivables, when applicable, have been provided to the extent that losses are deemed probable and are reasonably estimable. These amounts are adjusted from time to time as developments warrant. Amounts related to settlement provisions are recorded in Other general expenses in the Condensed Consolidated Statements of Income.

At the time of the 2004-05 investigation of the insurance industry by the Attorney General of New York and other regulators, purported classes of clients filed civil litigation against Aon and other companies under a variety of legal theories, including state tort, contract, fiduciary duty, antitrust and statutory theories and federal antitrust and Racketeer Influenced and Corrupt Organizations Act (“RICO”) theories. The federal actions were consolidated in the U.S. District Court for the District of New Jersey, and a state court collective action was filed in California. In the New Jersey actions, the Court dismissed plaintiffs’ federal antitrust and RICO claims in separate orders in August and October 2007, respectively. In August 2010, the U.S. Court of Appeals for the Third Circuit affirmed the dismissals of most, but not all, of the claims. In March 2011, Aon entered into a Memorandum of Understanding documenting a settlement of the civil cases consolidated in the U.S. District Court for the District of New Jersey. Under that agreement, Aon will pay $550,000 in exchange for dismissal of the class claims. This agreement received final approval in the trial court in March 2012. In April 2012, certain entities that had objected to the settlement filed notices of appeal from the trial court judgment. Several non-class claims brought by individual plaintiffs who opted out of the class action proceeding will remain pending, but the Company does not believe these present material exposure to the Company individually or in the aggregate. The outcome of these lawsuits, and the amount of any losses or other payments that may result, cannot be estimated at this time.

A retail insurance brokerage subsidiary of Aon provides insurance brokerage services to Northrop Grumman Corporation (“Northrop”). This Aon subsidiary placed Northrop’s excess property insurance program for the period covering 2005. Northrop suffered a substantial loss in August 2005 when Hurricane Katrina damaged Northrop’s facilities in the Gulf states. Northrop’s excess insurance carrier, Factory Mutual Insurance Company (“Factory Mutual”), denied coverage for the claim pursuant to a flood exclusion. Northrop sued Factory Mutual in the United States District Court for the Central District of California and later sought to add this Aon subsidiary as a defendant, asserting that if Northrop’s policy with Factory Mutual does not cover the losses suffered by Northrop stemming from Hurricane Katrina, then this Aon subsidiary will be responsible for Northrop’s losses. On August 26, 2010, the court granted in large part Factory Mutual’s motion for partial summary judgment regarding the applicability of the flood exclusion and denied Northrop’s motion to add this Aon subsidiary as a defendant in the federal lawsuit. On January 27, 2011, Northrop filed suit against this Aon subsidiary in state court in Los Angeles, California, pleading claims for negligence, breach of contract and negligent misrepresentation. Aon believes that it has meritorious defenses and intends to vigorously defend itself against these claims. The outcome of this lawsuit, and the amount of any losses or other payments that may result, cannot be estimated at this time.

Another retail insurance brokerage subsidiary of Aon has been sued in Tennessee state court by a client, Opry Mills Mall Limited Partnership (“Opry Mills”) that sustained flood damage to its property in May 2010. The lawsuit seeks $200 million from numerous insurers with whom this Aon subsidiary placed the client’s property insurance coverage. The insurers contend that only $50 million in coverage is available for the loss because the flood event occurred on property in a high hazard flood zone. Opry Mills is seeking full coverage from the insurers for the loss and has sued this Aon subsidiary in the alternative for the same $150 million difference on various theories of professional liability if the court determines there is not full coverage. Aon believes it has meritorious defenses and

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intends to vigorously defend itself against these claims. The outcome of this lawsuit, and the amount of any losses or other payments that may result, cannot be estimated at this time.

A pensions consulting and administration subsidiary of Hewitt prior to its acquisition by Aon provided advisory services to the Trustees of the Philips UK pension fund and the relevant employer of fund beneficiaries (together, “Philips”). In December 2011, the Aon subsidiary received notice of a potential claim alleging negligence and breach of duty. The notice asserts Philips’ right to claim damages related to Philips’ use of a credit default swap hedging strategy pursuant to the supply of the advisory services, which is said to have resulted in substantial damages to Philips. No lawsuit has yet been filed. Aon believes that it has meritorious defenses and intends to vigorously defend itself against these allegations. The outcome of this circumstance, and the amount of any losses or other payments that may result, cannot be estimated at this time.

From time to time, Aon’s clients may bring claims and take legal action pertaining to the performance of fiduciary responsibilities. Whether client claims and legal action related to the Company’s performance of fiduciary responsibilities are founded or unfounded, if such claims and legal actions are resolved in a manner unfavorable to the Company, they may adversely affect Aon’s financial results and materially impair the market perception of the Company and that of its products and services.

Although the ultimate outcome of all matters referred to above cannot be ascertained, and liabilities in indeterminate amounts may be imposed on Aon or its subsidiaries, on the basis of present information, amounts already provided, availability of insurance coverages and legal advice received, it is the opinion of management that the disposition or ultimate determination of such claims will not have a material adverse effect on the consolidated financial position of Aon. However, it is possible that future results of operations or cash flows for any particular quarterly or annual period could be materially affected by an unfavorable resolution of these matters.

Guarantees and Indemnifications

In connection with the Redomestication, the Company on April 2, 2012 entered various agreements pursuant to which it agreed to guarantee the obligations of its subsidiaries arising under issued and outstanding debt securities. Those agreements included the (1) Amended and Restated Indenture, dated as of April 2, 2012, among Aon Corporation, Aon plc, and The Bank of New York Mellon Trust Company, N.A., as trustee (the “Trustee”) (amending and restating the Indenture, dated as of September 10, 2010, between Aon Corporation and the Trustee), (2) Amended and Restated Indenture, dated as of April 2, 2012, among Aon Corporation, Aon plc and the Trustee (amending and restating the Indenture, dated as of December 16, 2002, between Aon Corporation and the Trustee), (3) Amended and Restated Indenture, dated as of April 2, 2012, among Aon Corporation, Aon plc and the Trustee (amending and restating the Indenture, dated as of January 13, 1997, as supplemented by the First Supplemental Indenture, dated as of January 13, 1997) (4) First Supplemental Indenture, dated as of April 2, 2012, among Aon Finance N.S. 1, ULC, as issuer, Aon Corporation, as guarantor, Aon plc, as guarantor, and Computershare Trust Company of Canada, as trustee, and (5) Amended and Restated Trust Deed, among Aon Corporation, Aon plc, Aon Services Luxembourg & Co S.C.A. (formerly known as Aon Financial Services Luxembourg S.A.) (“Aon Luxembourg”) and BNY Mellon Corporate Trustee Services Limited, as trustee (the “Luxembourg Trustee”) (amending and restating the Trust Deed, dated as of July 1, 2009, as amended and restated on January 12, 2011, among Aon Delaware, Aon Luxembourg and the Luxembourg Trustee).

Effective as of the same date, the Company also entered into agreements pursuant to which it agreed to guarantee the obligations of its subsidiaries arising under the (1) $450,000,000 Term Credit Agreement dated June 15, 2011, among Aon Corporation, as borrower, Bank of America, N.A., as administrative agent and the other agents and lenders party thereto, (2) $400,000,000 Five-Year Agreement dated March 20, 2012, among Aon Corporation, as borrower, Citibank, N.A., as administrative agent and the other agents and lenders party thereto and (3) €650,00,000 Facility Agreement, dated October 15, 2010, among Aon Corporation, the subsidiaries of Aon Corporation party thereto as borrowers, Citibank International plc, as agent, and the other agents and lenders party thereto, as amended on July 18, 2011.

Aon provides a variety of guarantees and indemnifications to its customers and others. The maximum potential amount of future payments represents the notional amounts that could become payable under the guarantees and indemnifications if there were a total default by the guaranteed parties, without consideration of possible recoveries under recourse provisions or other methods. These amounts may bear no relationship to the expected future payments, if any, for these guarantees and indemnifications. Any anticipated amounts payable that are deemed to be probable and reasonably estimable are included in the Company’s Condensed Consolidated Financial Statements.

Aon had total letters of credit (“LOCs”) outstanding for approximately $69 million at September 30, 2012, as compared to $75 million at December 31, 2011. These letters of credit cover the beneficiaries related to Aon’s Canadian pension plan scheme and secure deductible retentions for Aon’s own workers compensation program and one of the U.S. pension plans. Aon also has issued letters of credit to cover contingent payments for taxes and other business obligations to third parties, and other guarantees for miscellaneous

23

purposes at its international subsidiaries. Amounts are accrued in the Condensed Consolidated Financial Statements to the extent the guarantees are probable and estimable.

Aon has certain contractual contingent guarantees for premium payments owed by clients to certain insurance companies. Costs associated with these guarantees, to the extent estimable and probable, are provided in Aon’s allowance for doubtful accounts. The maximum exposure with respect to such contractual contingent guarantees was approximately $36 million at September 30, 2012.

Aon has provided commitments to fund certain limited partnerships in which it has an interest in the event that the general partners request funding. Some of these commitments have specific expiration dates and the maximum potential funding under these commitments was $55 million at September 30, 2012. During the three and nine months ended September 30, 2012, the Company funded $4 million and $8 million, respectively, of these commitments.

Aon expects that, as prudent business interests dictate, additional guarantees and indemnifications may be issued from time to time.

16.  Related Party Transactions

During the nine months ended September 30, 2012, the Company, in the ordinary course of business, provided retail brokerage, consulting and financial advisory services to, and received wholesale brokerage services from, an entity that is controlled by one of the Company’s shareholders.  These transactions were negotiated on an arms-length basis and contain customary terms and conditions.  During the three and nine months ended September 30, 2012, commissions and fee revenue from these transactions were approximately $3 million and $11 million, respectively. During the three and nine months ended September 30, 2011, commissions and fee revenue from these transactions was $3 million and $5 million, respectively.

17.  Segment Information

The Company has two reportable segments:  Risk Solutions and HR Solutions.  Unallocated income and expenses, when combined with the operating segments and after the elimination of intersegment revenues and expenses, total to the amounts in the Condensed Consolidated Financial Statements.

Reportable operating segments have been determined using a management approach, which is consistent with the basis and manner in which Aon’s chief operating decision-maker (“CODM”) uses financial information for the purposes of allocating resources and evaluating performance.  The CODM assesses performance based on operating income and generally accounts for inter-segment revenue as if the revenue were from third parties and at what management believes are current market prices.  The Company does not present net assets by segment as this information is not reviewed by the CODM.

Risk Solutions acts as an advisor and insurance and reinsurance broker, helping clients manage their risks, via consultation, as well as negotiation and placement of insurance risk with insurance carriers through Aon’s global distribution network.

HR Solutions partners with organizations to solve their most complex benefits, talent and related financial challenges, and improve business performance by designing, implementing, communicating and administering a wide range of human capital, retirement, investment management, health care, compensation and talent management strategies.

Effective January 1, 2012, the Health and Benefits Consulting business was transferred from the HR Solutions segment to the Risk Solutions segment.  All prior year amounts have been adjusted to reflect that transfer.

Aon’s total revenue is as follows (in millions):

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Risk Solutions	$	1,778		$	1,772		$	5,582		$	5,535
HR Solutions	971			957			2,847			2,778
Intersegment elimination	(12		)	(6		)	(30		)	(20		)
Total revenue	$	2,737		$	2,723		$	8,399		$	8,293

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Commissions, fees and other revenues by product are as follows (in millions):

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Retail brokerage	$	1,390		$	1,392		$	4,395		$	4,378
Reinsurance brokerage	377			365			1,156			1,119
Total Risk Solutions Segment	1,767			1,757			5,551			5,497
Consulting services	394			403			1,140			1,141
Outsourcing	585			558			1,723			1,655
Intrasegment	(8		)	(4		)	(16		)	(18		)
Total HR Solutions Segment	971			957			2,847			2,778
Intersegment	(12		)	(6		)	(30		)	(20		)
Total commissions, fees and other revenue	$	2,726		$	2,708		$	8,368		$	8,255

Fiduciary investment income by segment is as follows (in millions):

	Three months ended September 30,				Nine months ended September 30,
	2012		2011		2012		2011
Risk Solutions	$	11	$	15	$	31	$	38
HR Solutions	—		—		—		—
Total fiduciary investment income	$	11	$	15	$	31	$	38

A reconciliation of segment operating income before tax to income from continuing operations before income taxes is as follows (in millions):

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Risk Solutions	$	309		$	311		$	1,059		$	1,036
HR Solutions	80			61			211			239
Segment income from continuing operations before income taxes	389			372			1,270			1,275
Unallocated expenses	(50		)	(44		)	(135		)	(109		)
Interest income	1			4			6			14
Interest expense	(57		)	(60		)	(173		)	(186		)
Other (expense) income	(9		)	20			3			6
Income from continuing operations before income taxes	$	274		$	292		$	971		$	1,000

Unallocated expenses include administrative or other costs not attributable to the operating segments, such as corporate governance costs and the costs associated with corporate investments.  Interest income represents income earned primarily on operating cash balances and certain income producing securities.  Interest expense represents the cost of worldwide debt obligations.

Other (expense) income consists of equity earnings, realized gains or losses on the sale of investments, gains or losses on the disposal of businesses, gains or losses on hedging activities, and gains or losses on foreign currency transactions.

18.  Guarantee of Registered Securities

As described in Note 15, in connection with the Redomestication, on April 2, 2012, Aon plc (“Parent Guarantor”) entered into various agreements pursuant to which it agreed to guarantee the obligations of Aon Corporation (“Subsidiary Issuer”) arising under issued and outstanding debt securities. Aon Corporation is a 100% indirectly owned subsidiary of Aon plc. The debt securities that are subject to Rule 3-10 of Regulation S-X are the 7.375% debt securities due December 2012, the 3.50% senior notes due September 2015, the 3.125% senior notes due May 2016, the 5.00% senior notes due September 2020, the 8.205% junior subordinated deferrable interest debentures due January 2027 and the 6.25% senior notes due September 2040. All guarantees of Aon plc are full and unconditional. There are no subsidiaries of Aon plc that are guarantors of the debt.

The following tables set forth condensed consolidating statements of income for the three and nine months ended September 30, 2012 and 2011, condensed consolidating statements of comprehensive income for the three and nine months ended September 30, 2012 and 2011, condensed consolidating statements of financial position as of September 30, 2012 and December 31, 2011, and condensed consolidating statements of cash flows for the nine months ended September 30, 2012 and 2011 in accordance with Rule 3-10 of

25

Regulation S-X. The condensed consolidating financial information includes the accounts of Aon plc, the accounts of Aon Corporation, and the combined accounts of the non-guarantor subsidiaries. The condensed consolidating financial statements are presented in all periods as a merger under common control, with Aon plc presented as the Parent Guarantor in all periods prior and subsequent to the Redomestication. The principal consolidating adjustments are to eliminate the investment in subsidiaries and intercompany balances and transactions.

Condensed Consolidating Statement of Income

	Three Months Ended September 30, 2012
							Other
	Parent			Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	2,726		$	—		$	2,726
Fiduciary investment income	—			—			11			—			11
Total revenue	—			—			2,737			—			2,737
Expenses
Compensation and benefits	34			(11		)	1,597			—			1,620
Other general expenses	19			6			753			—			778
Total operating expenses	53			(5		)	2,350			—			2,398
Operating (loss) income	(53		)	5			387			—			339
Interest income	—			—			1			—			1
Interest expense	—			(44		)	(13		)	—			(57		)
Intercompany interest (expense) income	(8		)	48			(40		)	—			—
Other income (expense)	—			10			(19		)	—			(9		)
(Loss) income from continuing operations before taxes	(61		)	19			316			—			274
Income tax (benefit) expense	(15		)	11			68			—			64
(Loss) income from continuing operations	(46		)	8			248			—			210
Loss from discontinued operations before taxes	—			—			—			—			—
Income taxes	—			—			—			—			—
Loss from discontinued operations	—			—			—			—			—
Equity in earnings of subsidiaries, net of tax	250			209			217			(676		)	—
Net income	204			217			465			(676		)	210
Less: Net income attributable to noncontrolling interests	—			—			6			—			6
Net income attributable to Aon shareholders	$	204		$	217		$	459		$	(676	)	$	204

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Condensed Consolidating Statement of Income

	Three Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—	$	—		$	2,708		$	—		$	2,708
Fiduciary investment income	—		—			15			—			15
Total revenue	—		—			2,723			—			2,723
Expenses
Compensation and benefits	—		(2		)	1,636			—			1,634
Other general expenses	—		20			741			—			761
Total operating expenses	—		18			2,377			—			2,395
Operating (loss) income	—		(18		)	346			—			328
Interest income	—		—			4			—			4
Interest expense	—		(40		)	(20		)	—			(60		)
Intercompany interest income (expense)	—		47			(47		)	—			—
Other income	—		—			20			—			20
(Loss) income from continuing operations before taxes	—		(11		)	303			—			292
Income tax (benefit) expense	—		(3		)	87			—			84
(Loss) income from continuing operations	—		(8		)	216			—			208
Income from discontinued operations before taxes	—		—			—			—			—
Income tax benefit	—		—			—			—			—
Income from discontinued operations	—		—			—			—			—
Equity in earnings of subsidiaries, net of tax	198		174			166			(538		)	—
Net income	198		166			382			(538		)	208
Less: Net income attributable to noncontrolling interests	—		—			10			—			10
Net income attributable to Aon shareholders	$	198	$	166		$	372		$	(538	)	$	198

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Condensed Consolidating Statement of Income

	Nine Months Ended September 30, 2012
							Other
	Parent			Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	8,368		$	—		$	8,368
Fiduciary investment income	—			—			31			—			31
Total revenue	—			—			8,399			—			8,399
Expenses
Compensation and benefits	18			22			4,880			—			4,920
Other general expenses	21			26			2,297			—			2,344
Total operating expenses	39			48			7,177			—			7,264
Operating (loss) income	(39		)	(48		)	1,222			—			1,135
Interest income	—			1			5			—			6
Interest expense	—			(124		)	(49		)	—			(173		)
Intercompany interest (expense) income	(10		)	140			(130		)	—			—
Other income	—			12			(9		)	—			3
(Loss) income from continuing operations before taxes	(49		)	(19		)	1,039			—			971
Income tax (benefit) expense	—			(4		)	261			—			257
(Loss) income from continuing operations	(49		)	(15		)	778			—			714
Loss from discontinued operations before taxes	—			—			(1		)	—			(1		)
Income taxes	—			—			—			—			—
Loss from discontinued operations	—			—			(1		)	—			(1		)
Equity in earnings of subsidiaries, net of tax	737			662			647			(2,046		)	—
Net income	688			647			1,424			(2,046		)	713
Less: Net income attributable to noncontrolling interest	—			—			25			—			25
Net income attributable to Aon shareholders	$	688		$	647		$	1,399		$	(2,046	)	$	688

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Condensed Consolidating Statement of Income

	Nine Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—	$	—		$	8,255		$	—		$	8,255
Fiduciary investment income	—		2			36			—			38
Total revenue	—		2			8,291			—			8,293
Expenses
Compensation and Benefits	—		(7		)	4,850			—			4,843
Other general expenses	—		40			2,245			—			2,284
Total operating expenses	—		33			7,095			—			7,127
Operating (loss) income	—		(31		)	1,196			—			1,166
Interest income	—		4			10			—			14
Interest expense	—		(131		)	(55		)	—			(186		)
Intercompany interest income (expense)	—		135			(135		)	—			—
Other (expense) income	—		(27		)	33			—			6
(Loss) income from continuing operations before taxes	—		(50		)	1,049			—			1,000
Income tax (benefit) expense	—		(18		)	292			—			274
(Loss) income from continuing operations	—		(32		)	757			—			726
Income from discontinued operations before taxes	—		5			—			—			5
Income tax expense	—		1			—			—			1
Income from discontinued operations	—		4			—			—			4
Equity in earnings of subsidiaries, net of tax	702		628			600			(1,930		)	—
Net income	702		600			1,357			(1,930		)	730
Less: Net income attributable to noncontrolling interests	—		—			28			—			28
Net income attributable to Aon shareholders	$	702	$	600		$	1,329		$	(1,930	)	$	702

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Condensed Consolidating Statement of Comprehensive Income

	Three Months Ended September 30, 2012
					Other
	Parent		Subsidiary		Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer		Subsidiaries			Adjustments			Consolidated
Net income	$	204	$	217	$	465		$	(676	)	$	210
Less: Net income attributable to noncontrolling interests	—		—		6			—			6
Net income attributable to Aon shareholders	$	204	$	217	$	459		$	(676	)	$	204
Other comprehensive loss, net of tax:
Change in fair value of derivatives	—		1		14			—			15
Foreign currency translation adjustments	—		17		147			—			164
Post-retirement benefit obligation	—		9		(2		)	—			7
Total other comprehensive income (loss)	—		27		159			—			186
Equity in other comprehensive (loss) income of subsidiaries, net of tax	182		155		182			(519		)	—
Less: Other comprehensive loss attributable to noncontrolling interests	—		—		4			—			4
Total other comprehensive loss attributable to Aon shareholders	182		182		337			(519		)	182
Comprehensive income (loss) attributable to Aon shareholders	$	386	$	399	$	796		$	(1,195	)	$	386

Condensed Consolidating Statement of Comprehensive Income

	Three Months Ended September 30, 2011
							Other
	Parent			Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments			Consolidated
Net income	$	198		$	166		$	382		$	(538	)	$	208
Less: Net income attributable to noncontrolling interests	—			—			10			—			10
Net income attributable to Aon shareholders	$	198		$	166		$	372		$	(538	)	$	198
Other comprehensive income, net of tax:
Change in fair value of derivatives	—			—			(9		)	—			(9		)
Foreign currency translation adjustments	—			(5		)	(204		)	—			(209		)
Post-retirement benefit obligation	—			4			11			—			15
Total other comprehensive (loss) income	—			(1		)	(202		)	—			(203		)
Equity in other comprehensive income (loss) of subsidiaries, net of tax	(202		)	(201		)	(202		)	605			—
Less: Other comprehensive income attributable to noncontrolling interests	—			—			(1		)	—			(1		)
Total other comprehensive income attributable to Aon shareholders	(202		)	(202		)	(403		)	605			(202		)
Comprehensive income attributable to Aon Shareholders	$	(4	)	$	(36	)	$	(31	)	$	67		$	(4	)

30

Condensed Consolidating Statement of Comprehensive Income

	Nine Months Ended September 30, 2012
(millions)	Parent Guarantor		Subsidiary Issuer		Other Non-Guarantor Subsidiaries		Consolidating Adjustments			Consolidated
Net income	$	688	$	647	$	1,424	$	(2,046	)	$	713
Less: Net income attributable to noncontrolling interests	—		—		25		—			25
Net income attributable to Aon shareholders	$	688	$	647	$	1,399	$	(2,046	)	$	688
Other comprehensive loss, net of tax:
Change in fair value of derivatives	—		1		4		—			5
Foreign currency translation adjustments	—		16		55		—			71
Post-retirement benefit obligation	—		24		22		—			46
Total other comprehensive income (loss)	—		41		81		—			122
Equity in other comprehensive (loss) income of subsidiaries, net of tax	120		78		119		(317		)	—
Less: Other comprehensive loss attributable to noncontrolling interests	—		—		2		—			2
Total other comprehensive loss attributable to Aon shareholders	120		119		198		(317		)	120
Comprehensive income attributable to Aon shareholders	$	808	$	766	$	1,597	$	(2,363	)	$	808

31

Condensed Consolidating Statement of Comprehensive Income

	Nine Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments			Consolidated
Net income	$	702	$	600		$	1,357		$	(1,930	)	$	730
Less: Net income attributable to noncontrolling interests	—		—			28			—			28
Net income attributable to Aon shareholders	$	702	$	600		$	1,329		$	(1,930	)	$	702
Other comprehensive income, net of tax:
Change in fair value of derivatives	—		(1		)	(13		)	—			(14		)
Foreign currency translation adjustments	—		(9		)	(3		)	—			(12		)
Post-retirement benefit obligation	—		13			29			—			42
Total other comprehensive (loss) income	—		3			13			—			16
Equity in other comprehensive income (loss) of subsidiaries, net of tax	17		12			15			(44		)	—
Less: Other comprehensive income attributable to noncontrolling interests	—		—			(1		)	—			(1		)
Total other comprehensive income attributable to Aon shareholders	17		15			29			(44		)	17
Comprehensive income attributable to Aon shareholders	$	719	$	615		$	1,358		$	(1,974	)	$	719

32

Condensed Consolidating Statement of Financial Position

	September 30, 2012
					Other
	Parent		Subsidiary		Non-Guarantor		Consolidating
(millions)	Guarantor		Issuer		Subsidiaries		Adjustments			Consolidated
ASSETS
Cash and cash equivalents	$	1	$	58	$	231	$	—		$	290
Short-term investments	16		261		441		—			718
Receivables, net	—		2		2,957		—			2,959
Fiduciary assets	—		—		11,343		—			11,343
Intercompany receivables	—		1,677		2,868		(4,545		)	—
Other current assets	—		41		351		—			392
Total Current Assets	17		2,039		18,191		(4,545		)	15,702
Goodwill	—		—		8,856		—			8,856
Intangible assets, net	—		—		3,040		—			3,040
Fixed assets, net	—		—		814		—			814
Investments	—		41		119		—			160
Intercompany receivables	—		2,240		2,171		(4,411		)	—
Other non-current assets	222		659		56		—			937
Investment in subsidiary	10,797		10,349		8,446		(29,592		)	—
TOTAL ASSETS	$	11,036	$	15,328	$	41,693	$	(38,548	)	$	29,509
LIABILITIES AND EQUITY
Fiduciary liabilities	$	—	$	—	$	11,343	$	—		$	11,343
Short-term debt and current portion of long-term debt	—		268		23		—			291
Accounts payable and accrued liabilities	4		86		1,429		—			1,519
Intercompany payables	34		1,779		1,782		(3,595		)	—
Other current liabilities	—		47		754		—			801
Total Current Liabilities	38		2,180		15,331		(3,595		)	13,954
Long-term debt	—		3,030		1,081		—			4,111
Pension, other post retirement and other post employment liabilities	—		1,167		590		—			1,757
Intercompany payables	2,690		359		2,311		(5,360		)	—
Other non-current liabilities	3		146		1,177		—			1,326
TOTAL LIABILITIES	2,731		6,882		20,490		(8,955		)	21,148
TOTAL AON SHAREHOLDERS’ EQUITY	8,305		8,446		21,146		(29,592		)	8,305
Noncontrolling interests	—		—		56		—			56
TOTAL EQUITY	8,305		8,446		21,202		(29,592		)	8,361
TOTAL LIABILITIES AND EQUITY	$	11,036	$	15,328	$	41,692	$	(38,547	)	$	29,509

33

Condensed Consolidating Statement of Financial Position

	Dec. 31, 2011
						Other
	Parent		Subsidiary			Non-Guarantor		Consolidating
(millions)	Guarantor		Issuer			Subsidiaries		Adjustments			Consolidated
ASSETS
Cash and cash equivalents	$	—	$	(21	)	$	293	$	—		$	272
Short-term investments	—		321			464		—			785
Receivables, net	—		2			3,181		—			3,183
Fiduciary assets	—		—			10,838		—			10,838
Intercompany receivables	3		610			539		(1,152		)	—
Other current assets	—		57			378		(8		)	427
Total Current Assets	3		969			15,693		(1,160		)	15,505
Goodwill	—		—			8,770		—			8,770
Intangible assets, net	—		—			3,276		—			3,276
Fixed assets, net	—		—			783		—			783
Investments	—		39			200		—			239
Intercompany receivables	—		2,133			2,202		(4,335		)	—
Other non-current assets	—		900			781		(702		)	979
Investment in subsidiary	10,183		9,269			7,714		(27,166		)	—
TOTAL ASSETS	$	10,186	$	13,310		$	39,419	$	(33,363	)	$	29,552
LIABILITIES AND EQUITY
Fiduciary liabilities	$	—	$	—		$	10,838	$	—		$	10,838
Short-term debt and current portion of long-term debt	—		318			19		—			337
Accounts payable and accrued liabilities	—		78			1,758		(4		)	1,832
Intercompany payables	—		206			609		(815		)	—
Other current liabilities	—		5			752		(4		)	753
Total Current Liabilities	—		607			13,976		(823		)	13,760
Long-term debt	—		3,063			1,092		—			4,155
Pension, other post retirement and other post employment liabilities	—		1,407			785		—			2,192
Intercompany payables	2,108		378			2,186		(4,672		)	—
Other non-current liabilities	—		141			1,886		(702		)	1,325
TOTAL LIABILITIES	2,108		5,596			19,925		(6,197		)	21,432
TOTAL AON SHAREHOLDERS’ EQUITY	8,078		7,714			19,452		(27,166		)	8,078
Noncontrolling interests	—		—			42		—			42
TOTAL EQUITY	8,078		7,714			19,494		(27,166		)	8,120
TOTAL LIABILITIES AND EQUITY	$	10,186	$	13,310		$	39,419	$	(33,363	)	$	29,552

34

Condensed Consolidating Statement of Cash Flows

	Nine Months Ended September 30, 2012
	Parent			Subsidiary			Other Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments		Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES
CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES	$	(46	)	$	(189	)	$	1,102		$	—	$	867
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	—			79			92			—		171
Purchase of long-term investments	—			(9		)	—			—		(9		)
Net sales of short-term investments - non-fiduciary	(16		)	61			21			—		66
Acquisition of businesses, net of cash acquired	—			(55		)	(42		)	—		(97		)
Proceeds from sale of businesses	—			—			2			—		2
Capital expenditures	—			—			(201		)	—		(201		)
CASH PROVIDED BY (USED FOR) INVESTING ACTIVITIES	(16		)	76			(128		)	—		(68		)
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(525		)	(100		)	—			—		(625		)
Advances from (to) affiliates	648			376			(1,024		)	—		—
Issuance of shares for employee benefit plans	44			49			—			—		93
Issuance of debt	—			332			1			—		333
Repayment of debt	—			(416		)	(11		)	—		(427		)
Cash dividends to shareholders	(104		)	(49		)	—			—		(153		)
Purchase of shares from noncontrolling interests	—			—			—			—		—
Dividends paid to noncontrolling interests	—			—			(17		)	—		(17		)
CASH PROVIDED BY (USED FOR) FINANCING ACTIVITIES	63			192			(1,051		)	—		(796		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			15			—		15
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1			79			(62		)	—		18
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	—			(21		)	293			—		272
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	1		$	58		$	231		$	—	$	290

35

Condensed Consolidating Statement of Cash Flows

	Nine Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments		Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES
CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES	$	—	$	(137	)	$	924		$	—	$	787
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	—		52			51			—		103
Purchase of long-term investments	—		(17		)	(11		)	—		(28		)
Net sales of short-term investments - non-fiduciary			329			(153		)			176
Acquisition of businesses, net of cash acquired	—		(10		)	(92		)	—		(102		)
Proceeds from sale of businesses	—		5			4			—		9
Capital expenditures	—		—			(151		)	—		(151		)
CASH PROVIDED BY (USED FOR) INVESTING ACTIVITIES	—		359			(352		)	—		7
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	—		(828		)	—			—		(828		)
Advances from (to) affiliates	—		487			(487		)	—		—
Issuance of shares for employee benefit plans	—		165			—			—		165
Issuance of debt	—		1,190			382			—		1,572
Repayment of debt	—		(1,126		)	(397		)	—		(1,523		)
Cash dividends to shareholders	—		(150		)	—			—		(150		)
Purchase of shares from noncontrolling interests	—		—			(24		)	—		(24		)
Dividends paid to noncontrolling interests	—		—			(21		)	—		(21		)
CASH USED FOR FINANCING ACTIVITIES	—		(262		)	(547		)	—		(809		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—		—			(36		)	—		(36		)
NET DECREASE IN CASH AND CASH EQUIVALENTS	—		(40		)	(11		)	—		(51		)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	—		14			332			—		346
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	—	$	(26	)	$	321		$	—	$	295

36

Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations

EXECUTIVE SUMMARY OF THIRD QUARTER 2012 FINANCIAL RESULTS

On April 2, 2012, we completed the Redomestication, moving our corporate headquarters to London. In the Redomestication, each issued and outstanding share of Aon Corporation common stock held by stockholders of Aon Corporation was converted into the right to receive one Class A Ordinary Share, nominal value $0.01 per share, of Aon plc. In connection with the Redomestication, we have incurred costs related to the headquarters relocation of $6 million and $23 million in the three and nine months ended September 30, 2012, respectively. We anticipate that we will incur an additional $12 million of costs through 2013 related to the headquarters relocation. We believe the Redomestication will strengthen our long term strategy by:

·Enabling Risk Solutions to deliver superior value to our clients by executing our Aon Broking strategy;

·Expanding the HR Solutions portfolio penetration, especially within consulting, which already has a significant presence in the UK and EMEA;

·Enhancing our Risk Solutions’relationship with, and integration into, London markets;

·Increasing our connection to emerging markets, accelerating our ability to grow there, and further aligning our strategy with underwriters and carriers who are also targeting these high growth markets;

·Strengthening our international brand awareness and positioning as a global firm;

·Advancing our talent strategy through better development, retention and acquisition of professional talent, with a special focus on London’s insurance talent;

·Optimizing our fiscal planning and capital allocation and reducing our global tax rate in a manner that provides us with the increased financial flexibility to properly invest in our growth.

During the first nine months of 2012, we continued to face certain headwinds impacting our business. In our Risk Solutions segment, these included economic weakness in continental Europe and sector specific weakness in construction, private equity and mergers and acquisitions. In our HR Solutions segment, these included price compression in our benefits administration business and a decline in discretionary demand for retirement consulting services internationally.

We focus on three key metrics each quarter that we communicate to shareholders: grow organically, expand margins, and increase earnings per share.  The following is our measure of performance against these three metrics for the third quarter and first nine months of 2012:

·Organic revenue growth, a non-GAAP measure as defined under the caption “Review of Consolidated Results — General” below, was 4% in both the third quarter and first nine months of 2012, demonstrating continued improvement compared to the prior year’s organic revenue growth of 1% for the comparable periods. Organic revenue growth was primarily driven by strong management of the renewal book portfolio across all regions and solid new business growth in Asia and emerging markets. Solid growth across our Reinsurance business and new client wins in our HR Solutions segment also drove organic growth.

·Adjusted operating margin, a non-GAAP measure as defined under the caption “Review of Consolidated Results — General” below, for the third quarter 2012 was 17.5% for Aon overall, 20.0% for the Risk Solutions segment, and 17.5% for the HR Solutions segment.  Adjusted operating margin was 17.2% for Aon overall, 20.2% for the Risk Solutions segment, and 16.0% for the HR Solutions segment for the third quarter 2011.  For the first nine months of 2012, adjusted operating margin was 18.3% for Aon overall, 21.1% for the Risk Solutions segment, and 16.5% for the HR Solutions segment. For the first nine months of 2011, adjusted operating margin was 18.7% for Aon overall, 21.1% for the Risk Solutions segment, and 16.5% for the HR Solutions segment. The year-to-date increase in adjusted operating margin for the Risk Solutions segment reflects strong organic revenue growth and restructuring savings, partially offset by investments in Asia, Latin America and GRIP solutions, as well as lower investment income. The year-to-date decrease in adjusted operating margin for both the HR Solutions segment and Aon overall reflects significant investment in new growth opportunities in health care exchanges and human resource business processing outsourcing (“HR BPO”) and anticipated pricing compression in our benefits administration business.

·Adjusted diluted earnings per share from continuing operations attributable to Aon’s shareholders, a non-GAAP measure as defined under the caption “Review of Consolidated Results — General” below, was $0.95 per share in the third quarter of 2012 and $2.94 per share for the first nine months of 2012, compared to $0.88 and $2.90 per share in the third quarter and first nine months of 2011, respectively.

37

Additionally, the following is a summary of our third quarter and first nine months 2012 financial results:

·For the quarter, revenue increased $14 million, a 1% increase when compared to the prior year quarter of $2.7 billion. This was the result of 4% organic revenue growth, partially offset by a 3% unfavorable impact from foreign exchange rates. Fiduciary investment income decreased $4 million due to the continued decline in global interest rates.  Organic revenue grew 4% in the HR Solutions segment and 3% in the Risk Solutions segment during the quarter. During the first nine months of 2012, revenue increased $106 million, or 1%, to $8.4 billion due primarily to 4% organic revenue growth, partially offset by a 3% unfavorable impact from foreign exchange rates.

·Operating expenses for the quarter were $2.4 billion, an increase of $3 million over the prior year quarter. Operating expenses for the first nine months of 2012 were $7.3 billion, an increase of $137 million, or 2%, over the prior year.  The increase in both periods is primarily a result of a $14 million and $40 million increase in intangible asset amortization expense for the quarter and year to date periods, respectively, as well as investments in health care exchanges and other new growth opportunities, partially offset by benefits related to restructuring initiatives and a decrease in restructuring related expenses.

·Operating margin from continuing operations increased to 12.4% in the third quarter 2012 from 12.0% in the third quarter 2011.  The nine month operating margin was 13.5% as compared to 14.1% in 2011. The year-to-date decrease in operating margin is primarily related to intangible asset amortization related to the acquisition of Hewitt, as well as significant investments in new growth opportunities in health care exchanges.

·Net income from continuing operations attributable to Aon shareholders for the third quarter 2012 increased $6 million, or 3%, from the third quarter 2011 to $204 million.  During the first nine months of 2012, Net income from continuing operations attributable to Aon shareholders decreased $14 million, or 2%, compared to the first nine months of 2011 to $688 million.

38

REVIEW OF CONSOLIDATED RESULTS

General

In our discussion of operating results, we sometimes refer to supplemental information derived from consolidated financial information specifically related to organic revenue growth, adjusted operating margin, adjusted diluted earnings per share, and the impact of foreign exchange rate fluctuations on operating results.

Organic Revenue

We use supplemental information related to organic revenue to help us and our investors evaluate business growth from existing operations.  Organic revenue excludes the impact of foreign exchange rate changes, acquisitions, divestitures, transfers between business units, fiduciary investment income, reimbursable expenses, and certain unusual items.  Supplemental information related to organic revenue growth represents a measure not in accordance with U.S. GAAP, and should be viewed in addition to, not instead of, our Condensed Consolidated Financial Statements and Notes thereto.  Industry peers provide similar supplemental information about their revenue performance, although they may not make identical adjustments.  Reconciliation of this non-GAAP measure, organic revenue growth percentages, to the reported Commissions, fees and other revenue growth percentages, has been provided in the “Review by Segment” caption, below.

Adjusted Operating Margins

We use adjusted operating margin as a measure of core operating performance of our Risk Solutions and HR Solutions segments.  Adjusted operating margin excludes the impact of certain noteworthy items, including restructuring charges, intangible asset amortization, headquarters relocation costs and Hewitt-related costs. This supplemental information related to adjusted operating margin represents a measure not in accordance with U.S. GAAP, and should be viewed in addition to, not instead of, our Condensed Consolidated Financial Statements and Notes thereto.

A reconciliation of this non-GAAP measure to the reported operating margin is as follows (in millions):

	Three months ended September 30, 2012
	Total Aon (1)			Risk Solutions			HR Solutions
Revenue — U.S. GAAP	$	2,737		$	1,778		$	971
Operating income — U.S. GAAP	339			309			$	80
Restructuring charges	32			16			16
Intangible asset amortization	105			31			74
Headquarters relocation costs	4			—			—
Operating income — as adjusted	$	480		$	356		$	170
Operating margins — U.S. GAAP	12.4		%	17.4		%	8.2		%
Operating margins — as adjusted	17.5		%	20.0		%	17.5		%

	Nine months ended September 30, 2012
	Total Aon (1)			Risk Solutions			HR Solutions
Revenue — U.S. GAAP	$	8,399		$	5,582		$	2,847
Operating income — U.S. GAAP	1,135			1,059			211
Restructuring charges	65			29			36
Intangible asset amortization	313			91			222
Headquarters relocation costs	21			—			—
Operating income — as adjusted	$	1,534		$	1,179		$	469
Operating margins — U.S. GAAP	13.5		%	19.0		%	7.4		%
Operating margins — as adjusted	18.3		%	21.1		%	16.5		%

(1) Includes unallocated expenses and the elimination of inter-segment revenue.

39

	Three months ended September 30, 2011
	Total Aon (1)			Risk Solutions			HR Solutions
Revenue — U.S. GAAP	$	2,723		$	1,772		$	957
Operating income — U.S. GAAP	328			311			61
Restructuring charges	26			14			12
Intangible asset amortization	91			33			58
Hewitt related costs	22			—			22
Operating income — as adjusted	$	467		$	358		$	153
Operating margins — U.S. GAAP	12.0		%	17.6		%	6.4		%
Operating margins — as adjusted	17.2		%	20.2		%	16.0		%

	Nine months ended September 30, 2011
	Total Aon (1)			Risk Solutions			HR Solutions
Revenue — U.S. GAAP	$	8,293		$	5,535		$	2,778
Operating income — U.S. GAAP	1,166			1,036			239
Restructuring charges	70			28			42
Intangible asset amortization	273			97			176
Hewitt related costs	42			—			42
Operating income — as adjusted	$	1,551		$	1,161		$	499
Operating margins — U.S. GAAP	14.1		%	18.7		%	8.6		%
Operating margins — as adjusted	18.7		%	21.0		%	18.0		%

(1) Includes unallocated expenses and the elimination of inter-segment revenue.

Adjusted Diluted Earnings per Share from Continuing Operations

We also use adjusted diluted earnings per share from continuing operations as a non-GAAP measure of our core operating performance. Adjusted diluted earnings per share excludes the impact of restructuring charges, intangible asset amortization, headquarters relocation costs and Hewitt-related costs, along with related income taxes. This supplemental information related to adjusted diluted earnings per share represents a measure not in accordance with U.S. GAAP and should be viewed in addition to, not instead of, our Condensed Consolidated Financial Statements and Notes thereto. Reconciliations of this non-GAAP measure to the reported diluted earnings per share are as follows (in millions except per share data):

	Three months ended September 30, 2012
	U.S. GAAP			Adjustments		As Adjusted
Operating Income	339			141		480
Interest income	1			—		1
Interest expense	(57		)	—		(57		)
Other (expense) income	(9		)	2		(7		)
Income from continuing operations before income taxes	274			143		417
Income taxes	64			34		98
Income from continuing operations	210			109		319
Less: Net income attributable to noncontrolling interests	6			—		6
Income from continuing operations attributable to Aon stockholders	$	204		$	109	$	313
Diluted earnings per share from continuing operations	$	0.62		$	0.33	$	0.95
Weighted average common shares outstanding — diluted	331.0			331.0		331.0

40

	Nine months ended September 30, 2012
	U.S. GAAP			Adjustments		As Adjusted
Operating Income	1,135			399		1,534
Interest income	6			—		6
Interest expense	(173		)	—		(173		)
Other (expense) income	3			2		5
Income from continuing operations before income taxes	971			401		1,372
Income taxes	257			107		364
Income from continuing operations	714			294		1,008
Less: Net income attributable to noncontrolling interests	25			—		25
Income from continuing operations attributable to Aon stockholders	$	689		$	294	$	983
Diluted earnings per share from continuing operations	$	2.06		$	0.88	$	2.94
Weighted average common shares outstanding — diluted	334.4			334.4		334.4

	Three months ended September 30, 2011
	U.S. GAAP			Adjustments		As Adjusted
Operating Income	328			139		$	467
Interest income	4			—		$	4
Interest expense	(60		)	—		(60		)
Other (expense) income	20			—		20
Income from continuing operations before income taxes	292			139		431
Income taxes	84			41		125
Income from continuing operations	208			98		306
Less: Net income attributable to noncontrolling interests	10			—		10
Income from continuing operations attributable to Aon stockholders	$	198		$	98	$	296
Diluted earnings per share from continuing operations	$	0.59		$	0.29	$	0.88
Weighted average common shares outstanding — diluted	336.9			336.9		336.9

	Nine months ended September 30, 2011
	U.S. GAAP			Adjustments		As Adjusted
Operating Income	1,166			385		1,551
Interest income	14			—		14
Interest expense	(186		)	—		(186		)
Other (expense) income	6			19		25
Income from continuing operations before income taxes	1,000			404		1,404
Income taxes	274			111		385
Income from continuing operations	726			295		1,019
Less: Net income attributable to noncontrolling interests	28			—		28
Income from continuing operations attributable to Aon stockholders	$	698		$	293	$	991
Diluted earnings per share from continuing operations	$	2.04		$	0.86	$	2.90
Weighted average common shares outstanding — diluted	341.8			341.8		341.8

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Impact of Foreign Exchange Rate Fluctuations

Because we conduct business in more than 120 countries, foreign exchange rate fluctuations have a significant impact on our business.  In comparison to the U.S. dollar, foreign exchange rate movements may be significant and may distort true period-to-period comparisons of changes in revenue or pretax income.  Therefore, to give financial statement users more meaningful information about our operations, we have provided a discussion of the impact of foreign currency exchange rates on our financial results.  The methodology used to calculate this impact isolates the impact of the change in currencies between periods by translating last year’s revenue, expenses and net income at this year’s foreign exchange rates.  Currency fluctuations had no impact and an unfavorable impact of $0.03 during the three and nine month periods ended September 30, 2012, respectively, on adjusted net income from continuing operations per diluted share when we translate prior year quarter results at current quarter foreign exchange rates.

Summary of Results

The consolidated results of continuing operations follow (in millions):

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Revenue:
Commissions, fees and other	$	2,726		$	2,708		$	8,368		$	8,255
Fiduciary investment income	11			15			31			38
Total revenue	2,737			2,723			8,399			8,293
Expenses:
Compensation and benefits	1,620			1,634			4,920			4,843
Other general expenses	778			761			2,344			2,284
Total operating expenses	2,398			2,395			7,264			7,127
Operating income	339			328			1,135			1,166
Interest income	1			4			6			14
Interest expense	(57		)	(60		)	(173		)	(186		)
Other (expense) income	(9		)	20			3			6
Income from continuing operations before income taxes	274			292			971			1,000
Income taxes	64			84			257			274
Income from continuing operations	210			208			714			726
Income (loss) from discontinued operations, after-tax	—			—			(1		)	4
Net income	210			208			713			730
Less: Net income attributable to noncontrolling interests	6			10			25			28
Net income attributable to Aon stockholders	$	204		$	198		$	688		$	702

Revenue

Revenue increased by $14 million, or 1%, in the third quarter 2012 compared to the third quarter 2011, and increased $106 million, or 1%, on a year-to-date basis.  The third quarter increase consists of a $14 million, or 1%, increase in the HR Solutions segment and a $6 million, essentially flat, increase in the Risk Solutions segment, partially offset by a $4 million decrease in Fiduciary investment income.  Organic revenue growth in the HR Solutions segment for the quarter was 4%.  The increase in the HR Solutions segment compared to the prior year quarter was primarily driven by new client wins in HR BPO and benefits administration and strong growth in certain consulting businesses.  The results of the Risk Solutions segment reflect 3% organic revenue growth, offset by an unfavorable impact of 4% from foreign exchange rates and a decline in Fiduciary investment income.

Revenue for the nine months ended September 30, 2012 increased $106 million from the comparable prior year period due to a $69 million, or 2%, increase in HR Solutions and a $47 million, or 1%, increase in Risk Solutions partially offset by a $7 million decrease in Fiduciary investment income.  Organic revenue growth in HR Solutions was 4% compared to the first nine months 2011.  The 1% increase in the Risk Solutions segment reflects 4% organic revenue growth, partially offset by an unfavorable impact of 3% from foreign exchange rates.

Compensation and Benefits

Compensation and benefits decreased $14 million, or 1%, from third quarter 2011.  For the first nine months of 2012, Compensation and benefits increased $77 million, or 2%, from the comparable prior year period.  In both periods, increases in Compensation and benefits were primarily driven

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by organic revenue growth, investments in key talent and additional costs related to acquisitions, partially offset by a favorable impact from foreign currency translation. In the third quarter 2012, this increase was offset by restructuring savings.

Other General Expenses

Other general expenses for the three and nine month periods ended September 30, 2012, compared to the prior year, increased $17 million, or 2%, and $60 million, or 3%, respectively.  The increase for both periods was due largely due to the impact of headquarters relocation costs of $4 million and $21 million during the three and nine month periods ended September 30, 2012, respectively, and a $14 million and $40 million increase in intangible asset amortization expense for the three and nine month periods ended September 30, 2012, respectively, partially offset by a favorable impact from foreign currency translation.

Interest income

Interest income represents income earned on operating cash balances and other income-producing investments.  It does not include interest earned on funds held on behalf of clients.  For the third quarter 2012, Interest income decreased $3 million from the third quarter 2011.  For the first nine months 2012, Interest income decreased $8 million from the comparable period in 2011 due to lower average interest rates globally.

Interest expense

Interest expense, for the third quarter and first nine months of 2012, which represents the cost of our worldwide debt obligations, decreased $3 million and $13 million from the third quarter and the first nine months of 2011, respectively. The decrease in interest expense reflects a decline in the average rate on total debt outstanding.

Other (expense) income

Other (expense) income was $9 million expense and $3 million income for the third quarter and first nine months 2012, respectively, as compared to $20 million income and $6 million income for the third quarter and first nine months 2011, respectively.  Other (expense) income during the nine month period ended September 30, 2011 included a $19 million loss on the extinguishment of debt obligations. The third quarter 2012 includes an $24 million loss on foreign currency remeasurement, partially offset by an $8 million hedging gain. The three and nine months ended September 30, 2011 included gains of $24 million and $18 million, respectively, related to foreign currency remeasurement, partially offset by hedging losses of $11 million and $13 million, respectively.

Income from Continuing Operations before Income Taxes

Income from continuing operations before income taxes for the third quarter was $204 million, a 3% increase from $198 million in 2012.  For the first nine months 2012, Income from continuing operations before income taxes was $689 million, a 1% decrease from $698 million in 2011.  For both periods, the decreases in income from continuing operations before income taxes was due to higher intangible asset amortization and headquarters relocation costs, partially offset by 4% organic revenue growth. During the third quarter 2012, those costs were offset by lower Compensation and benefits expenses.

Income Taxes

The effective tax rate on income from continuing operations was 23.2% and 28.9% for the third quarter 2012 and 2011, respectively, and 26.5% and 27.4% for the first nine months of 2012 and 2011, respectively.  The third quarter 2012 effective tax rate was favorably impacted by certain discrete items recognized in the period including foreign tax credits that reduced our income tax expense, partially offset by a change in a statutory tax rate during the quarter. The underlying tax rate for continuing operations for 2012 is expected to be approximately 26%, reflecting the initial benefits related to the Redomestication.

Income from Continuing Operations Attributable to Aon Shareholders

Income from continuing operations attributable to Aon shareholders for the third quarter increased to $204 million, or $0.62 diluted net income per share, from $198 million, or $0.59 diluted net income per share, in 2011.  For the first nine months of 2012, Income from continuing operations attributable to Aon shareholders decreased to $689 million, or $2.06 diluted net income per share, from $698 million, or $2.04 diluted net income per share, in 2011.

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Restructuring Initiatives

Aon Hewitt Restructuring Plan

On October 14, 2010, we announced a global restructuring plan in connection with the acquisition of Hewitt.  The Aon Hewitt Plan is intended to streamline operations across the combined Aon Hewitt organization and includes approximately 2,000 job eliminations. We expect these restructuring activities and related expenses to affect continuing operations into 2013.  The Aon Hewitt Plan is expected to result in cumulative costs of approximately $325 million through the end of the plan, consisting of approximately $180 million in employee termination costs and approximately $145 million in real estate rationalization across the Company.

From the inception of the Aon Hewitt Plan through September 30, 2012, in excess of 1,800 jobs have been eliminated and total expenses of $214 million have been incurred.  We recorded $32 million and $57 million of restructuring and related charges in the three and nine months ended September 30, 2012, respectively.  We recorded $26 million and $80 million of restructuring and related charges in the three and nine months ended September 30, 2011, respectively.  Charges related to the restructuring are included in Compensation and benefits and Other general expenses in the accompanying Condensed Consolidated Statements of Income.

The following summarizes the restructuring and related costs, by type, that have been incurred and are estimated to be incurred through the end of the restructuring initiative related to the Aon Hewitt Plan (in millions):

	2010		2011		Third Quarter 2012		Nine Months 2012		Total Inception to Date		Estimated Total Cost for Restructuring Plan (1)
Workforce reduction	$	49	$	64	$	25	$	44	$	157	$	180
Lease consolidation	3		32		6		11		46		95
Asset impairments	—		7		—		1		8		47
Other costs associated with restructuring (2)	—		2		1		1		3		3
Total restructuring and related expenses	$	52	$	105	$	32	$	57	$	214	$	325

(1) Actual costs, when incurred, will vary due to changes in the assumptions built into this plan.  Significant assumptions likely to change when plans are finalized and implemented include, but are not limited to, changes in severance calculations, changes in the assumptions underlying sublease loss calculations due to changing market conditions, and changes in the overall analysis that might cause us to add or cancel component initiatives.

(2) Other costs associated with restructuring initiatives, including moving costs and consulting and legal fees, are recognized when incurred.

Effective January 1, 2012, the Health and Benefits Consulting business was transferred from the HR Solutions segment to the Risk Solutions segment.  Restructuring costs associated with the Health and Benefits Consulting business are reflected in the Risk Solutions segment, including $41 million that was reclassified from the HR Solutions segment to the Risk Solutions segment for 2011.  During the third quarter 2011, $26 million in restructuring expenses were recorded, $14 million of which related to the Health and Benefits Consulting business.  The following summarizes the restructuring and related expenses, by segment, that have been incurred and are estimated to be incurred through the end of the restructuring initiative related to the Aon Hewitt Plan (in millions):

	2010		2011		Third Quarter 2012		Nine Months 2012		Total Inception to Date		Estimated Total Cost for Restructuring Plan
HR Solutions	$	52	$	49	$	16	$	36	$	137	$	243
Risk Solutions	—		56		16		21		77		82
Total restructuring and related expenses	$	52	$	105	$	32	$	57	$	214	$	325

The restructuring plan, before any potential reinvestment of savings, is expected to deliver approximately $280 million of annual savings in 2013.  The HR Solutions segment is expected to deliver $234 million of annual savings, with the remaining $46 million to be delivered by the Risk Solutions segment. We estimate that we realized approximately $64 million and $169 million in restructuring cost savings in the third quarter and first nine months of 2012, respectively.  With other integration savings, we expect to achieve approximately $355 million in annual cost savings in 2013, which includes the approximately $280 million of annual savings related to the restructuring plan, and additional savings in areas such as information technology, procurement and public company costs.  All of the components of the restructuring and integration plan are not finalized and actual total savings, costs and timing may vary from those estimated due to changes in the scope or assumptions underlying the plan.

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Aon Benfield Restructuring Plan

We announced a global restructuring plan in conjunction with our acquisition of Benfield in 2008.  The Aon Benfield Plan was intended to integrate and streamline operations across the combined Aon Benfield organization.  The Aon Benfield Plan included 810 job eliminations. Additionally, duplicate space and assets were abandoned. We incurred all remaining costs for the Aon Benfield Plan in the first quarter 2012.

We recorded $8 million of restructuring and related charges in the nine months ended September 30, 2012. We recorded a restructuring costs of $3 million and a benefit of $2 million for the three and nine months ended September 30, 2011, respectively. All costs associated with the Aon Benfield Plan are included in the Risk Solutions segment. Charges related to the restructuring are included in Compensation and benefits and Other general expenses in the accompanying Condensed Consolidated Statements of Income.

The Aon Benfield Plan, before any potential reinvestment of savings, has delivered cumulative run-rate cost savings of approximately $146 million through the third quarter 2012. We estimate that we realized approximately $36 million and $106 million of cost savings in the three and nine months ended September 30, 2012.

The following is a summary of the restructuring and related expenses by type that have been incurred through the end of the restructuring initiative related to the Aon Benfield Plan (in millions):

	Purchase Price Allocation		2009		2010		2011			Third Quarter 2012		Nine Months 2012		Inception to Date		Total Cost for Restructuring Plan
Workforce reduction	$	32	$	38	$	15	$	33		$	—	$	8	$	126	$	126
Lease consolidation	20		14		7		(15		)	—		—		26		26
Asset impairments	—		2		2		—			—		—		4		4
Other costs associated with restructuring	1		1		2		1			—		—		5		5
Total restructuring and related expenses	$	53	$	55	$	26	$	19		$	—	$	8	$	161	$	161

LIQUIDITY AND FINANCIAL CONDITION

Liquidity

Executive Summary

We believe that our balance sheet and strong cash flow provide us with financial flexibility to create long-term value for our shareholders.  Our primary sources of liquidity are cash flow from operations, available cash reserves and debt capacity available under our various credit facilities.  Our primary uses of liquidity are operating expenses, principal and interest payments on our debt obligations, capital expenditures, acquisitions, share repurchases, restructuring initiatives, pension obligations and shareholder dividends.

Cash on our balance sheet includes funds available for general corporate purposes.  Funds held on behalf of clients in a fiduciary capacity are segregated and shown together with uncollected insurance premiums in Fiduciary assets in the Condensed Consolidated Statement of Financial Position, with a corresponding amount in Fiduciary liabilities. Fiduciary funds cannot be used for general corporate purposes, and should not be considered as a source of liquidity for us.

Operating Activities

Net cash provided by operating activities during the nine months ended September 30, 2012 was $867 million as compared to net cash provided by operating activities in the nine months ended September 30, 2011 of $787 million, an increase of $80 million. The primary driver of the cash provided by operating activities was net income, adjusted for non-cash expenses, of $1.4 billion, partially offset by pension contributions of $454 million and a decrease in accounts payable and accrued liabilities of $347 million. Pension contributions were $454 million and $388 million for the nine months ended September 30, 2012 and 2011, respectively. For the remainder of 2012, we expect to contribute approximately $187 million to our pension plans, with the majority attributable to non-U.S. pension plans, which are subject to changes in foreign exchange rates.

During the third quarter 2012, we continued to progress with elevated levels of invoicing and cash collections related to a delay in invoicing HR Solutions’ customers in the second half of 2011. We expect the increase in unbilled receivables and accounts receivable of approximately $375 million to reverse and return to normalized levels.

We expect cash generated by operations for 2012 to be sufficient to service our debt and contractual obligations, fund the cash requirements of our restructuring programs, finance capital expenditures, continue acquisitions of shares under our share repurchase program, and continue to pay dividends to our shareholders.  Although cash from operations is expected to be sufficient to service these obligations, we have the ability to borrow under our credit facilities to accommodate any timing differences in cash flows.  We

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have committed credit facilities of approximately $1.2 billion, all of which was available at September 30, 2012.  We can access these facilities on a same day or next day basis.  Additionally, we believe that we could access capital markets to obtain debt financing for longer-term funding, under current market conditions, if needed.

Investing Activities

Cash flow used for investing activities was $68 million during the nine months ended September 30, 2012. The primary drivers of the cash flow used for investing activities were $201 million for capital expenditures and $97 million for the acquisition of businesses, partially offset by $171 million for sales of long term investments and $66 million for net sales of short term investments.

Cash flow provided by investing activities was $7 million during the nine months ended September 30, 2011. The primary drivers of the cash flow provided by investing activities were $251 million in net sales of investments and proceeds from the sale of operations of $9 million, partially offset by $151 million for capital expenditures and $102 million for acquisitions, net of sales.

Financing Activities

Cash flow used for financing activities during the nine months ended September 30, 2012 was $796 million. The primary drivers of cash flow used for financing activities were share repurchases of $625 million, dividends paid to shareholders of $153 million, and repayments of debt, net of issuances, of $94 million partially offset by proceeds from the exercise of share options and issuance of shares purchased through the employee stock purchase plan of $93 million.

Cash flow used for financing activities during the nine months ended September 30, 2011 was $809 million. The primary drivers of cash flow used for financing activities were share repurchases of $828 million and dividends paid to shareholders of $150 million. This was partially offset by repayment of debt, net of issuances of $49 million, proceeds from the exercise of share options and issuance of shares purchased through the employee stock purchase plan of $165 million.

As of September 30, 2012, we had distributable reserves of $7.2 billion. We believe that we will have sufficient distributable reserves to fund shareholder dividends for the foreseeable future.

Cash and Investments

At September 30, 2012, our cash and cash equivalents and short-term investments were $1.0 billion, a decrease of $49 million from December 31, 2011.  Of the total balance as of September 30, 2012, $212 million was restricted as to its use, which was comprised of $124 million of operating funds in the U.K. as required by the Financial Services Authority and $88 million held as collateral for various business purposes.  At September 30, 2012, $293 million of cash and cash equivalents and short-term investments were held in the U.S. and $715 million was held by our subsidiaries in other countries.

In our capacity as an insurance broker or agent, we collect premiums from insureds and, after deducting our commission, remit the premiums to the respective insurance underwriter.  We also collect claims or refunds from underwriters on behalf of insureds, which are then returned to the insureds.  Unremitted insurance premiums and claims are held by us in a fiduciary capacity.  In addition, some of our outsourcing agreements require us to hold funds on behalf of clients to pay obligations on their behalf.  The levels of fiduciary assets and liabilities can fluctuate significantly, depending on when we collect the premiums, claims and refunds, make payments to underwriters and insureds, collect funds from clients and make payments on their behalf, and foreign currency movements.  Fiduciary assets, because of their nature, are required to be invested in very liquid securities with highly-rated, credit-worthy financial institutions.  In our Condensed Consolidated Statements of Financial Position, the amount we report for Fiduciary assets and Fiduciary liabilities are equal.  Our Fiduciary assets included cash and investments of $4.1 billion and fiduciary receivables of $7.2 billion at September 30, 2012.  While we earn investment income on the fiduciary assets held in cash and investments, the cash and investments are not owned by us, and cannot be used for general corporate purposes.

As disclosed in Note 14 “Fair Value and Financial Instruments,” of the Notes to the Condensed Consolidated Financial Statements, the majority of our investments carried at fair value are money market funds.  Money market funds are carried at cost as an approximation of fair value.  Based on market convention, we consider cost a practical and expedient measure of fair value.  These money market funds are held throughout the world with various financial institutions.  We do not believe that there are any market liquidity issues affecting the fair value of these investments.

As of September 30, 2012, our investments in money market funds and highly liquid debt instruments had a fair value of $2.6 billion and are reported as Short-term investments or Fiduciary assets in the Condensed Consolidated Statements of Financial Position depending on their nature and initial maturity.

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The following table summarizes our Fiduciary assets and non-fiduciary Cash and cash equivalents, and Short-term investments as of September 30, 2012 (in millions):

	Statement of Financial Position Classification
Asset Type	Cash and Cash Equivalents		Short-term Investments		Fiduciary Assets		Total
Certificates of deposit, bank deposits or time deposits	$	290	$	—	$	2,252	$	2,542
Money market funds	—		717		1,870		2,587
Highly liquid debt instruments	—		—		25		25
Other investments due within one year	—		1		—		1
Cash and investments	290		718		4,147		5,155
Fiduciary receivables	—		—		7,196		7,196
Total	$	290	$	718	$	11,343	$	12,351

Share Repurchase Program

In January 2010, our Board of Directors authorized a share repurchase program under which up to $2 billion of common stock were authorized to be repurchased (“2010 Share Repurchase Program”). Shares were authorized to be repurchased through the open market or in privately negotiated transactions, including structured repurchase programs, from time to time, based on prevailing market conditions, and were funded from available capital.  Any repurchased shares were available for employee stock plans and for other corporate purposes.

During the first quarter of 2012, we repurchased 2.1 million shares at an average price per share of $48.32 for a total cost of $100 million under the 2010 Share Repurchase Program. During the first quarter 2011, we repurchased 6.8 million shares at an average price per share of $51.29 for a total cost of $350 million under the 2010 Share Repurchase Program as well as a previous program that was completed in the first quarter 2011. Since the inception of the 2010 Share Repurchase Program, we repurchased a total of 18.2 million shares for an aggregate cost of $913 million. As of March 31, 2012, we were authorized to purchase up to $1.1 billion of additional shares under the 2010 Share Repurchase Program.

The 2010 Share Repurchase Program, which related to common stock of Aon Corporation and preceded the Redomestication, did not extend to the shares of Aon plc. In April 2012, our Board of Directors therefore authorized a share repurchase program under which up to $5 billion of Class A Ordinary Shares may be repurchased. Under this program, shares may be repurchased through the open market or in privately negotiated transactions, from time to time, based on prevailing market conditions, and will be funded from available capital.

During the three months ended September 30, 2012, we repurchased 5.4 million shares at an average price per share of $51.37 for a total cost of $275 million.  During the nine months ended September 30, 2012, we repurchased 12.7 million shares at an average price per share of $49.22 for a total cost of $625 million under the 2012 Share Repurchase Program and the previously completed 2010 Share Repurchase Program. The remaining authorized amount for share repurchase under the 2012 Share Repurchase Program is $4.5 billion.

For information regarding share repurchases made during the third quarter of 2012, see Part II, Item 2 — “Unregistered Sales of Equity Securities and Use of Proceeds” below.

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Debt Securities

On August 31, 2012, we filed a shelf registration statement with the SEC, registering the offer and sale from time to time of an indeterminate amount of, among other securities, debt, securities, preference shares, Class A Ordinary shares and convertible securities. The availability of any potential liquidity for these types of securities is dependent on investor demand, market conditions and other factors.

Credit Facilities

At September 30, 2012, we have a five-year $400 million unsecured revolving credit facility in the U.S. (“U.S. Facility”) that expires in 2017. The U.S. facility is for general corporate purposes, including commercial paper support.  Additionally, we have a five-year €650 million ($837 million at September 30, 2012 exchange rates) multi-currency foreign credit facility (“Euro Facility”) available, which expires in October 2015.  At September 30, 2012, we had no borrowings under either of these credit facilities.

For both our U.S. and Euro Facilities, the two most significant covenants require us to maintain a ratio of consolidated EBITDA (earnings before interest, taxes, depreciation and amortization), adjusted for Hewitt related transaction costs and up to $50 million in non-recurring cash charges (“Adjusted EBITDA”) to consolidated interest expense and a ratio of consolidated debt to Adjusted EBITDA. For both facilities, the ratio of Adjusted EBITDA to consolidated interest expense must be at least 4 to 1.  For the Euro Facility, the ratio of consolidated debt to Adjusted EBITDA must not exceed 3 to 1.  For the U.S. Facility, the ratio of consolidated debt to Adjusted EBITDA must not exceed the lower of (a) 3.25 to 1.00 or (b) the greater of (i) 3.00 to 1.00 or (ii) the lowest ratio of consolidated debt to Adjusted EBITDA then set forth in the Euro Facility or Aon’s $450,000,000 Term Loan Facility. We were in compliance with these and all other covenants as of September 30, 2012.

Rating Agency Ratings

The major rating agencies’ ratings of our debt at October 31, 2012 appear in the table below.

	Ratings
	Senior Long-	Commercial
	term Debt	Paper	Outlook
Standard & Poor’s	BBB+	A-2	Stable
Moody’s Investor Services	Baa2	P-2	Stable
Fitch, Inc.	BBB+	F-2	Stable

A downgrade in the credit ratings of our senior debt and commercial paper would increase our borrowing costs, reduce or eliminate our access to capital, reduce our financial flexibility, increase our commercial paper interest rates or possibly restrict our access to the commercial paper market altogether, or may impact future pension contribution requirements.

Letters of Credit and Other Guarantees

We had total letters of credit outstanding for approximately $69 million at September 30, 2012, as compared to $75 million at December 31, 2011. These letters of credit cover the beneficiaries related to Aon’s Canadian pension plan scheme and secure deductible retentions for our own workers compensation program and one of the U.S. pension plans. We also have issued letters of credit to cover contingent payments for taxes and other business obligations to third parties, and other guarantees for miscellaneous purposes at our international subsidiaries. Amounts are accrued in the Condensed Consolidated Financial Statements to the extent the guarantees are probable and estimable.

We have certain contractual contingent guarantees for premium payments owed by clients to certain insurance companies.  Costs associated with these guarantees, to the extent estimable and probable, are provided in our allowance for doubtful accounts.  The maximum exposure with respect to such contractual contingent guarantees was approximately $36 million at September 30, 2012.

We have provided commitments to fund certain limited partnerships in which we have an interest in the event that the general partners request funding.  Some of these commitments have specific expiration dates and the maximum potential funding under these commitments was $55 million at September 30, 2012.  During the three and nine months ended September 30, 2012, we funded $4 million and $8 million, respectively, of these commitments.

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Adequacy of Liquidity Sources

We believe that cash flows from operations and available credit facilities will be sufficient to meet our liquidity needs, including principal and interest payments on debt obligations, capital expenditures, pension contributions, cash restructuring costs, and anticipated working capital requirements, for the foreseeable future. Our cash flows from operations, borrowing availability and overall liquidity are subject to risks and uncertainties. See “Information Concerning Forward-Looking Statements” below.

Financial Condition

At September 30, 2012, our net assets of $8.4 billion, representing total assets minus total liabilities, increased from $8.1 billion at December 31, 2011. The increase was due primarily to Net income of $713 million for the nine months ended September 30, 2012 and a decrease in Accumulated other comprehensive loss of $120 million, offset by dividends and share repurchases.  Working capital was essentially flat versus December 31, 2011 at $1.7 billion.

Borrowings

Total debt at September 30, 2012 was $4.4 billion, a decrease of $90 million from December 31, 2011, primarily related to a decrease in commercial paper outstanding of $50 million from December 31, 2011.

On March 20, 2012, we entered into the U.S. Facility. Borrowings under the U.S. Facility will bear interest, at our option, at a rate equal to either (a) the rate for eurodollar deposits as reflected on the applicable Reuters LIBOR01 page for the interest period relevant to such borrowing (“Eurodollar Rate”), plus the applicable margin or (b) the highest of (i) the rate of interest publicly announced by Citibank as its prime rate, (ii) the federal funds effective rate from time to time plus 0.5% and (iii) the one month Eurodollar rate plus 1.0%, in each case plus the applicable margin. The applicable margin for borrowings under the U.S. Facility may change depending on achievement of certain public debt ratings. The U.S. Facility has a maturity date of March 20, 2017. In conjunction with the Company entering into the U.S. Facility the prior revolving U.S. credit agreement dated December 4, 2009 was terminated.

Our total debt as a percentage of total capital attributable to Aon shareholders was 34.7% and 35.8% at September 30, 2012 and December 31, 2011, respectively.

Equity

Equity at September 30, 2012 was $8.4 billion, an increase of $241 million from December 31, 2011.  The increase resulted primarily from Net income of $713 million, share-based compensation expense of $160 million and a decrease in Accumulated other comprehensive loss of $120 million. This increase in Equity was partially offset by share repurchases of $625 million and $153 million of dividends to shareholders.

Prior to the Redomestication, we accounted for purchases of our outstanding common stock using the treasury stock method included in U.S. GAAP. Under this method, we recorded purchases of our own outstanding common stock as a reduction to Additional paid-in capital based on the cost of the shares acquired. Under U.K. law, when we repurchase our outstanding shares, those shares are treated as cancelled. In April 2012, we constructively cancelled 60 million shares of treasury stock related to the Redomestication. The impact of the cancellation of all outstanding treasury shares was a decrease in Ordinary shares and Retained earnings of $60 million and $2.4 billion, respectively. The balance of Treasury stock at cost of $2.5 billion was also eliminated as part of the cancellation. Additionally, effective upon the completion of the Redomestication, the par value of our outstanding equity shares decreased from $1.00 to $0.01. The impact of this change was a decrease in Ordinary shares of $323 million, and an increase in Additional paid-in capital of $323 million.

The $120 million decrease in Accumulated other comprehensive loss from December 31, 2011, primarily reflects the following:

·positive net foreign currency translation adjustments of $71 million, which are attributable to the weakening of the U.S. dollar against foreign currencies,

·a decrease of $46 million in net post-retirement benefit obligations, and

·net derivative gains of $5 million.

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REVIEW BY SEGMENT

General

We serve clients through the following segments:

·Risk Solutions acts as an advisor and insurance and reinsurance broker, helping clients manage their risks, via consultation, as well as negotiation and placement of insurance risk with insurance carriers through our global distribution network.

·HR Solutions partners with organizations to solve their most complex benefits, talent and related financial challenges, and improve business performance by designing, implementing, communicating and administering a wide range of human capital, retirement, investment management, health care, compensation and talent management strategies.

Risk Solutions

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Revenue	$	1,778		$	1,772		$	5,582		$	5,535
Operating income	309			311			1,059			1,036
Operating margin	17.4		%	17.6		%	19.0		%	18.7		%

The demand for property and casualty insurance generally rises as the overall level of economic activity increases and generally falls as such activity decreases, affecting both the commissions and fees generated by our brokerage business. The economic activity that impacts property and casualty insurance is described as exposure units, and is most closely correlated with employment levels, corporate revenue and asset values.  During the first nine months of 2012, we began to see some improvement in pricing; however, we would still consider this to be a “soft market”, which began in 2007.  In a soft market, premium rates flatten or decrease, along with commission revenues, due to increased competition for market share among insurance carriers or increased underwriting capacity.  Changes in premiums have a direct and potentially material impact on the insurance brokerage industry, as commission revenues are generally based on a percentage of the premiums paid by insureds. In the first nine months of 2012, pricing showed continuing signs of stabilization and improvement in our retail brokerage business, and we expect this trend to slowly continue throughout the remainder of 2012.

Additionally, beginning in late 2008 and continuing into third quarter 2012, we faced difficult conditions as a result of unprecedented disruptions in the global economy, the repricing of credit risk and the deterioration of the financial markets.  Weak global economic conditions have reduced our customers’ demand for our retail brokerage and reinsurance brokerage products, which have had a negative impact on our operational results.

Risk Solutions generated approximately 65% and 66% of our consolidated total revenues in the third quarter and first nine months of 2012, respectively.  Revenues are generated primarily through fees paid by clients, commissions and fees paid by insurance and reinsurance companies, and investment income on funds held on behalf of clients.  Our revenues vary from quarter to quarter throughout the year as a result of the timing of our clients’ policy renewals, the net effect of new and lost business, the timing of services provided to our clients, and the income we earn on investments, which is heavily influenced by short-term interest rates.

We operate in a highly competitive industry and compete with many retail insurance brokerage and agency firms, as well as with individual brokers, agents, and direct writers of insurance coverage.  Specifically, we address the highly specialized product development and risk management needs of commercial enterprises, professional groups, insurance companies, governments, health care providers, and non-profit groups, among others; provide affinity products for professional liability, life, disability income, and personal lines for individuals, associations, and businesses; provide products and services via GRIP Solutions; provide reinsurance services to insurance and reinsurance companies and other risk assumption entities by acting as brokers or intermediaries on all classes of reinsurance; provide capital management transaction and advisory products and services, including mergers and acquisitions and other financial advisory services, capital raising, contingent capital financing, insurance-linked securitizations and derivative applications; provide managing underwriting to independent agents and brokers as well as corporate clients; provide risk consulting, actuarial, loss prevention, and administrative services to businesses and consumers; and manage captive insurance companies.

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Revenue

Commissions, fees and other revenue for Risk Solutions were as follows (in millions):

	Three months ended September 30,				Nine months ended September 30,
	2012		2011		2012		2011
Retail brokerage:
Americas	$	743	$	738	$	2,188	$	2,154
International (1)	647		654		2,207		2,224
Total retail brokerage	1,390		1,392		4,395		4,378
Reinsurance brokerage	377		365		1,156		1,119
Total	$	1,767	$	1,757	$	5,551	$	5,497

(1) Includes the U.K., Europe, Middle East, Africa and Asia Pacific.

In the third quarter 2012, commissions, fees and other revenue increased $10 million, or 1%, versus the third quarter of 2011, due to 3% organic revenue growth and 2% growth related to acquisitions, partially offset by a 4% unfavorable impact from foreign exchange rates and a decline in investment income.  For the first nine months 2012, Commissions, fees and other revenue increased $54 million, or 1%, from the first nine months  2011 due to 4% organic revenue growth, partially offset by a 3% unfavorable impact from foreign exchange rates.

Reconciliation of organic revenue growth to reported commissions, fees and other revenue growth for 2012 versus 2011 is as follows:

Three months ended September 30, 2012	Percent Change		Less: Currency Impact		Less: Acquisitions, Divestitures & Other	Organic Revenue
Retail brokerage:
Americas	1		(2	)	1	2
International (1)	(1	)	(7	)	3	3
Total retail brokerage	—		(4	)	2	2
Reinsurance brokerage	3		(4	)	—	7
Total	1		(4	)	2	3
Nine months ended September 30, 2012	Percent Change		Less: Currency Impact		Less: Acquisitions, Divestitures & Other	Organic Revenue
Retail brokerage:
Americas	2		(2	)	1	3
International (1)	(1	)	(5	)	1	3
Total retail brokerage	—		(4	)	1	3
Reinsurance brokerage	3		(3	)	—	6
Total	1		(3	)	—	4

(1) Includes the U.K., Europe, Middle East, Africa and Asia Pacific.

Retail brokerage Commissions, fees and other revenue was flat in the third quarter as compared to the prior year quarter driven by a 4% unfavorable impact from foreign exchange rates, offset by 2% and 3% growth in organic revenue in the Americas and International operations, respectively, as well as 1% and 3% growth related to acquisitions in the Americas and International operations, respectively. For the first nine months 2012, revenue growth was flat, driven by 3% growth in organic revenue and 1% growth related to acquisitions across the Americas and International operations, offset by a 4% unfavorable impact from foreign exchange rates.

Americas Commissions, fees and other revenue increased 1% in the third quarter reflecting 2% growth in organic revenue due to continued growth in Latin America and Affinity products and 1% growth related to acquisitions, partially offset by a 2% unfavorable

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impact from foreign exchange rates.  For the first nine months 2012, revenue increased 2% as a result of 3% growth in organic revenue and 1% growth related to acquisitions, partially offset by a 2% unfavorable impact from foreign exchange rates.  Organic revenue growth increased due to continued growth in Latin America and Affinity products, as well as strong management of the renewal book portfolio across all regions, partially offset by general weakness in the construction sector.

InternationalCommissions, fees and other revenue decreased 1% in the third quarter driven by an unfavorable impact of 7% from foreign exchange rates, partially offset by 3% organic revenue growth and 3% growth related to acquisitions.  The 3% organic revenue growth in the third quarter was driven by strong growth in emerging markets, health and benefits and solid management of the renewal book across continental Europe.  For the first nine months 2012, International revenue decreased 1%, driven by an unfavorable impact of 5% from foreign exchange rates, partially offset by 3% organic revenue growth driven by strong growth in Asia, New Zealand and emerging markets, as well as sustained management of the renewal book despite macroeconomic challenges.

Reinsurance brokerage Commissions, fees and other revenue increased 3% in the third quarter compared to prior year, driven by a 7% increase in organic revenue growth, partially offset by an unfavorable impact of 4% from foreign exchange rates.  The increase in organic revenue growth is due primarily to new business growth in treaty placements internationally, favorable near-term impact from market pricing, and growth in capital market transactions and facultative placements.  For the first nine months 2012, revenue increased 3%, driven by a 6% increase in organic revenue growth, partially offset by an unfavorable impact of 3% from foreign exchange rates. The increase in organic revenue growth is due primarily to growth in treaty placements internationally and a favorable near-term impact from pricing.

Operating Income

Operating income for the third quarter 2012 decreased $2 million, or 1%, from 2011 to $309 million in 2012, and operating income margins decreased to 17.4% from 17.6% in 2011.  For the first nine months ended 2012, Operating income increased $23 million, or 2%, from 2011 to $1.1 billion in 2012, and operating income margins increased to 19.0% from 18.7% in 2011.  Operating margin improvement was driven by revenue growth, reduced costs of restructuring initiatives and realization of the benefits of those restructuring plans, which was partially offset by investments in key talent and GRIP Solutions and a decline in fiduciary investment income.

HR Solutions

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Revenue	$	971		$	957		$	2,847		$	2,778
Operating income	80			61			211			239
Operating margin	8.2		%	6.4		%	7.4		%	8.6		%

Our HR Solutions segment generated approximately 35% and 34% of our consolidated total revenues during the three and nine months ended September 30, 2012, respectively, and provides a broad range of human capital services, as follows:

·Retirement specializes in global actuarial services, defined contribution consulting, investment consulting, tax and ERISA consulting, and pension administration.

·Compensation focuses on compensatory advisory/counsel including: compensation planning design, executive reward strategies, salary survey and benchmarking, market share studies and sales force effectiveness, with special expertise in the financial services and technology industries.

·Strategic Human Capital delivers advice to complex global organizations on talent, change and organizational effectiveness issues, including talent strategy and acquisition, executive on-boarding, performance management, leadership assessment and development, communication strategy, workforce training and change management.

·Benefits Administration applies our HR expertise primarily through defined benefit (pension), defined contribution (401(k)), and health and welfare administrative services. Our model replaces the resource-intensive processes once required to administer benefit plans with more efficient, effective, and less costly solutions.

·Human Resource Business Processing Outsourcing (“HR BPO”) provides market-leading solutions to manage employee data; administer benefits, payroll and other human resources processes; and record and manage talent, workforce and other core HR process transactions as well as other complementary services such as flexible spending, dependent audit and participant advocacy.

Beginning in late 2008, the disruption in the global credit markets and the deterioration of the financial markets created significant uncertainty in the marketplace.  Weak economic conditions globally continued into third quarter 2012.  The prolonged economic downturn is adversely impacting our clients’ financial condition and therefore the levels of business activities in the industries and

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geographies where we operate.  While we believe that the majority of our practices are well positioned to manage through this time, these challenges are reducing demand for some of our services and putting continued pressure on the pricing of those services, which is having an adverse effect on our new business and results of operations.

Revenue

Commissions, fees and other revenue for HR Solutions increased $14 million, or 1%, in the third quarter 2012 from 2011, and $69 million, or 2%, on a year-to-date basis.  The increase in revenue was driven by strong growth in HR BPO business, compensation consulting and investment consulting businesses, as well as strong growth in Asia, partially offset by anticipated pricing compression in our benefits administration business.  Organic revenue growth was 4% for both the third quarter and first nine months of 2012.

Commissions, fees and other revenue were as follows (in millions):

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Consulting services	$	394		$	403		$	1,140		$	1,141
Outsourcing	585			558			1,723			1,655
Intrasegment	(8		)	(4		)	(16		)	(18		)
Total	$	971		$	957		$	2,847		$	2,778

Organic revenue growth for the third quarter and first nine months 2012 is detailed in the following reconciliation:

Three months ended September 30, 2012	Percent Change		Less: Currency Impact		Less: Acquisitions, Divestitures & Other		Organic Revenue
Consulting services	(2	)	(2	)	(5	)	5
Outsourcing	5		(1	)	2		4
Intrasegment	N/A		N/A		N/A		N/A
Total	1		(1	)	(2	)	4

Nine months ended September 30, 2012	Percent Change	Less: Currency Impact		Less: Acquisitions, Divestitures & Other		Organic Revenue
Consulting services	—	(2	)	(1	)	3
Outsourcing	4	(1	)	1		4
Intrasegment	N/A	N/A		N/A		N/A
Total	2	(1	)	(1	)	4

Consulting services revenue decreased $9 million, or 2%, for the third quarter due primarily to weak discretionary spend globally and continued economic pressure in continental Europe, offset by strong growth in businesses across Asia and in our investment consulting and pension administration services.  Organic revenue growth of 5% was offset by an unfavorable impact of 2% from foreign exchange rates and a 5% unfavorable impact from acquisitions, net of divestitures.  For the first nine months 2012, revenue decreased $1 million, essentially flat, as a result of 3% organic revenue growth, offset by an unfavorable impact of 2% from foreign exchange rates and a 1% unfavorable impact from acquisitions, net of divestitures.

Outsourcing revenue increased $27 million, or 5% for the third quarter due to organic revenue growth of 4% and 2% growth related to acquisitions, partially offset by an unfavorable impact of 1% from foreign exchange rates. Organic revenue growth was driven primarily by strong growth in the HR BPO business from new client wins and in discretionary products and services such as dependent eligibility audits, partially offset by anticipated price compression in the benefits administration business.  For the first nine months 2012, revenue increased $68 million, or 4%, primarily driven organic revenue growth of 4% and 1% growth from acquisitions, partially offset by an unfavorable impact of 1% from foreign exchange rates.

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Operating Income

Operating income was $80 million, an increase of $19 million, or 31%, from third quarter 2011.  For the first nine months, operating income was $211 million, a decrease of $28 million, or 12%, from the prior year.  The year-to-date decrease was principally driven by higher intangible asset amortization of $16 million and $46 million for the three and nine months ended September 30, 2012, respectively, as well as investments in new growth opportunities in health care exchanges and HR BPO, anticipated pricing compression in our benefits administration business, and an unfavorable revenue mix shift, offset by benefits from the Aon Hewitt Plan.  Operating margin for this segment was 8.2% in the third quarter, which is an increase from 6.4% in 2011.  For the first nine months 2012, the operating margin was 7.4%, a decrease from 8.6% in 2011.

Unallocated Income and Expense

A reconciliation of our operating income to income from continuing operations before income taxes is as follows (in millions):

	Three months ended September 30,						Nine months ended September 30,
	2012			2011			2012			2011
Operating income (loss):
Risk Solutions	$	309		$	311		$	1,059		$	1,036
HR Solutions	80			61			211			239
Unallocated	(50		)	(44		)	(135		)	(109		)
Operating income	339			328			1,135			1,166
Interest income	1			4			6			14
Interest expense	(57		)	(60		)	(173		)	(186		)
Other (expense) income	(9		)	20			3			6
Income from continuing operations before income taxes	$	274		$	292		$	971		$	1,000

Unallocated operating expense

Unallocated operating expense includes corporate governance costs not allocated to the operating segments.  Net unallocated expenses increased $6 million to $50 million in the third quarter 2012 and increased $26 million to $135 million for the first nine months 2012.  The increase in both periods is related to headquarters relocation costs of $4 million and $21 million in the three and nine months ended September 30, 2012.

Interest income

Interest income represents income earned on operating cash balances and other income-producing investments.  It does not include interest earned on funds held on behalf of clients.  For the third quarter 2012, Interest income decreased $3 million from the third quarter 2011.  For the first nine months 2012, Interest income decreased $8 million from the comparable period in 2011 due to lower average interest rates globally.

Interest expense

Interest expense, which represents the cost of our worldwide debt obligations, decreased $3 million and $13 million from the third quarter and the first nine months of 2011, respectively. The decrease in interest expense reflects a decline in the average rate on total debt outstanding.

Other (expense) income

Other (expense) income was $9 million expense and $3 million income, for the third quarter and first nine months 2012, respectively, as compared to Other (expense) income of $20 million income and $6 million income for the third quarter and first nine months 2011, respectively.  Other (expense) income during the nine month period ended September 30, 2011 includes a $19 million loss on the extinguishment of debt obligations. The third quarter 2012 includes an $24 million loss on foreign currency remeasurement, partially offset by an $8 million hedging gain. The three and nine months ended September 30, 2011 included gains of $24 million and $18 million, respectively, related to foreign currency remeasurement, partially offset by hedging losses of $11 million and $13 million, respectively.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

There have been no changes in our critical accounting policies, which include revenue recognition, restructuring, pensions, goodwill and other intangible assets, contingencies, share-based payments, and income taxes, as discussed in our 2011 Annual Report on Form 10-K.

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NEW ACCOUNTING PRONOUNCEMENTS

Note 2 “Accounting Principles and Practices” of the Notes to the Condensed Consolidated Financial Statements contains a discussion of recently issued accounting pronouncements and their impact or future potential impact on our financial results, if determinable.

INFORMATION CONCERNING FORWARD-LOOKING STATEMENTS

This report contains certain statements related to future results, or states our intentions, beliefs and expectations or predictions for the future which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995.  Forward-looking statements relate to expectations or forecasts of future events.  They use words such as “anticipate,” “believe,” “estimate,” “expect,” “forecast,” “project,” “intend,” “plan,” “potential,” and other similar terms, and future or conditional tense verbs like “could,” “may,” “might,” “should,” “will” and “would.”  You can also identify forward-looking statements by the fact that they do not relate strictly to historical or current facts.  For example, we may use forward-looking statements when addressing topics such as:  market and industry conditions, including competitive and pricing trends; changes in our business strategies and methods of generating revenue; the development and performance of our services and products; changes in the composition or level of our revenues; our cost structure and the outcome of cost-saving or restructuring initiatives; the outcome of contingencies; dividend policy; the expected impact of acquisitions and dispositions; pension obligations; cash flow and liquidity; future actions by regulators; and the impact of changes in accounting rules.  These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from either historical or anticipated results depending on a variety of factors. Potential factors that could impact results include:

·general economic conditions in different countries in which Aon does business around the world, including conditions in the European Union relating to sovereign debt and the continued viability of the Euro;

·changes in the competitive environment;

·changes in global equity and fixed income markets that could influence the return on invested assets;

·changes in the funding status of our various defined benefit pension plans and the impact of any increased pension funding resulting from those changes;

·rating agency actions that could affect our ability to borrow funds;

·fluctuations in exchange and interest rates that could impact revenue and expense;

·the impact of class actions and individual lawsuits including client class actions, securities class actions, derivative actions and ERISA class actions;

·the impact of any investigations brought by regulatory authorities in the U.S., U.K. and other countries;

·the cost of resolution of other contingent liabilities and loss contingencies, including potential liabilities arising from errors and omission claims against us;

·failure to retain and attract qualified personnel;

·the impact of, and potential challenges in complying with, legislation and regulation in the jurisdictions in which we operate, particularly given the global scope of our business and the possibility of conflicting regulatory requirements across jurisdictions in which we do business;

·the effect of the Redomestication on our operations and financial results, including the reaction of our clients, employees and other constituents, the effect of compliance with applicable U.K. regulatory regimes or the failure to realize some or all of the anticipated benefits;

·the extent to which we retain existing clients and attract new businesses and our ability to incentivize and retain key employees;

·the extent to which we manage certain risks created in connection with the various services, including fiduciary and advisory services, among others, that we currently provide, or will provide in the future, to clients;

·the possibility that the expected efficiencies and cost savings from the acquisition of Hewitt will not be realized, or will not be realized within the expected time period;

·the risk that the Hewitt businesses will not be integrated successfully;

·our ability to implement restructuring initiatives and other initiatives intended to yield cost savings, and the ability to achieve those cost savings;

·the potential of a system or network disruption resulting in operational interruption or improper disclosure of personal data;

·any inquiries relating to compliance with the U.S. Foreign Corrupt Practices Act and non-U.S. anti-corruption laws and with U.S. and non-U.S. trade sanctions regimes; and

·our ability to grow and develop companies that we acquire or new lines of business.

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Any or all of our forward-looking statements may turn out to be inaccurate, and there are no guarantees about our performance.  The factors identified above are not exhaustive.  Aon and its subsidiaries operate in a dynamic business environment in which new risks may emerge frequently.  Accordingly, readers should not place undue reliance on forward-looking statements, which speak only as of the dates on which they are made.  We are under no obligation (and expressly disclaim any obligation) to update or alter any forward-looking statement that we may make from time to time, whether as a result of new information, future events or otherwise.  Further information about factors that could materially affect Aon, including our results of operations and financial condition, is contained in the “Risk Factors” sections in each of Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2011, Part II Item 1A of our Quarterly Report on Form 10-Q for the three months ended March 31, 2012, Part II Item 1A of our Quarterly Report on Form 10-Q for the three months ended June 30, 2012 and Part II Item 1A of this report below.

ITEM 3.   QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to potential fluctuations in earnings, cash flows and the fair value of certain of our assets and liabilities due to changes in interest and foreign exchange rates.  To manage the risk from these exposures, we enter into a variety of derivative instruments.  We do not enter into derivatives or financial instruments for trading or speculative purposes.

We are subject to foreign exchange rate risk from translating the financial statements of our foreign subsidiaries into U.S. dollars. Our primary exposures are to the British pound, the Euro, the Canadian dollar, and the Australian dollar.  We use over-the-counter (“OTC”) options and forward contracts to reduce the impact of foreign currency fluctuations on the translation of our foreign operations’ financial statements.

Additionally, some of our foreign brokerage subsidiaries receive revenues in currencies that differ from their functional currencies.  Our U.K. subsidiary earns a portion of its revenue in U.S. dollars and Euros, but most of its expenses are incurred in pounds sterling.  Our policy is to convert into pounds sterling sufficient U.S. dollar and Euro revenue to fund the subsidiary’s pound sterling expenses using OTC options and forward exchange contracts.  At September 30, 2012, we have hedged approximately 81% of our U.K. subsidiaries’ expected U.S. dollar and Euro transaction exposures for the next twelve months, respectively.  We do not generally hedge these exposures beyond three years.

The translated value of revenue and expense from our international brokerage operations are subject to fluctuations in foreign exchange rates.  Diluted earnings per share were not impacted and negatively impacted by approximately $0.05 during the three and nine months ended September 30, 2012, respectively, related to net translation losses.  Adjusted diluted earnings per share, a non-GAAP measure as defined under the caption “Review of Consolidated Results’, were not impacted and negatively impacted by approximately $0.03 during the three and nine months ended September 30, 2012, respectively, related to translation losses.

We also use forward contracts to offset foreign exchange risk associated with foreign denominated inter-company notes.

Our income is affected by changes in international and domestic short-term interest rates.  We monitor our net exposure to short-term interest rates and, as appropriate, hedge our exposure with various derivative financial instruments.  This activity primarily relates to brokerage funds held on behalf of clients in the U.S. and Europe.  A decrease in global short-term interest rates adversely affects our income.

ITEM 4.   CONTROLS AND PROCEDURES

Evaluation of disclosure controls and procedures.  We have conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) as of the end of the period covered by this quarterly report of September 30, 2012.  Based on this evaluation, our chief executive officer and chief financial officer concluded as of September 30, 2012 that our disclosure controls and procedures were effective such that the information relating to Aon, including our consolidated subsidiaries, required to be disclosed in our Securities and Exchange Commission (“SEC”) reports is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and is accumulated and communicated to Aon’s management, including our chief executive officer and chief financial officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in internal control over financial reporting.  During the third quarter 2011, the Company upgraded its financial systems relating to the Order-To-Cash PeopleSoft platform used by HR Solutions North American Operations. In connection with this upgrade, the Company has implemented additional compensating controls to mitigate internal control risks and performed testing to ensure data integrity. Other than this change, no changes in Aon’s internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) occurred during the quarter ended September 30, 2012 that have materially affected, or are reasonably likely to materially affect, Aon’s internal control over financial reporting.

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PART II

OTHER INFORMATION

ITEM 1.LEGAL PROCEEDINGS

See Note 15 (Commitments and Contingencies) to the Condensed Consolidated Financial Statements contained in Part I, Item 1, which is incorporated by reference herein.

ITEM 1A.RISK FACTORS.

The risk factors set forth in Part I, “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2011, Part II, “Item 1A, Risk Factors” in our Quarterly Report on Form 10-Q for the three months ended March 31, 2012 and “Item 1A, Risk Factors” in our Quarterly Report on Form 10-Q for the three months ended June 30, 2012 reflect certain risks associated with existing and potential lines of business and contain “forward-looking statements” as discussed in Part I, Item 2 of this report.  Readers should consider them in addition to the other information contained in this report as our business, financial condition or results of operations could be adversely affected if any of these risks actually occur.

The following risk factor supplements the risk factors set forth in the 10-K and 10-Qs.

We may in the future be subject to the UK Takeover Code, which may deter potential acquirers from proceeding with a takeover offer that could be beneficial to shareholders.

In the United Kingdom, takeover offers for certain public companies are regulated by the UK City Code on Takeovers and Mergers, or the Takeover Code, which is administered by the Takeover Panel. Currently, the Takeover Code applies to public companies that have their registered offices in the United Kingdom, the Channel Islands or the Isle of Man if their securities are admitted to trading on a regulated market in the United Kingdom or on a stock exchange in the Channel Islands or the Isle of Man. The Takeover Code also applies to public companies that have their registered office in the United Kingdom, the Channel Islands or the Isle of Man but whose securities are not admitted to trading on one of the markets mentioned above if the Takeover Panel determines, generally based on the residency of the company’s directors — the so-called residency test — that the company has its place of central management and control in the UK, the Channel Islands or the Isle of Man. In connection with our redomestication, the Takeover Panel confirmed that based on the residency test and on the expected residence of our directors and management, the Takeover Code would not apply to us.

In July 2012, the Takeover Panel published a consultation paper setting out proposed amendments to the Takeover Code, including a proposal to eliminate the residency test. If this proposal is adopted, we would likely become subject to the Takeover Code.

In summary, the Takeover Code sets out binding rules that provide a framework within which takeovers are required to be conducted and its approach differs from, and in some cases conflicts with, the approach set forth under the rules of the Securities and Exchange Commission to which we will remain subject in any event.  If we become subject to the Takeover Code, we will be required to comply with these additional controls with respect to the conduct of any takeover offer for our ordinary shares, and these additional controls may create uncertainty in the process by which a takeover offer must be executed. These additional controls and attendant uncertainty may affect the willingness of potential acquirers to proceed with a takeover offer that may otherwise be beneficial to shareholders.

The following risk factor supersedes the similarly captioned risk factor set forth in the 10-K and supplements the other risk factors in the 10-K and the 10-Qs. It reflects modifications to the nature of the risk that have developed since the date on which the 10-K was filed.

Our businesses are subject to extensive governmental regulation, which could reduce our profitability, limit our growth, or increase competition.

Our businesses are subject to extensive federal, state and foreign governmental regulation and supervision, which could reduce our profitability or limit our growth by increasing the costs of regulatory compliance, limiting or restricting the products or services we sell or the methods by which we sell our products and services, or subjecting our businesses to the possibility of regulatory actions or proceedings.

With respect to our Risk Solutions segment, this supervision generally includes the licensing of insurance brokers and agents and third party administrators and the regulation of the handling and investment of client funds held in a fiduciary capacity. Our continuing ability to provide insurance brokering and third party administration in the jurisdictions in which we currently operate depends on our compliance with the rules and regulations promulgated from time to time by the regulatory authorities in each of these jurisdictions. Also, we can be affected indirectly by the governmental regulation and supervision of insurance companies. For instance, if we are providing or managing general underwriting services for an insurer, we may have to contend with regulations affecting our client. Further, regulation affecting the insurance companies with whom our brokers place business can affect how we conduct those operations.

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Although the federal government does not directly regulate the insurance industry, federal legislation and administrative policies in several areas, including employee benefit plan regulation, Medicare, age, race, disability and sex discrimination, investment company regulation, financial services regulation, securities laws and federal taxation, trade sanctions  regulation and the Foreign Corrupt Practices Act (“FCPA”), do affect the insurance industry generally. For instance, several laws and regulations adopted, or proposed to be adopted, by the federal government, including the Gramm Leach Bliley Act, the Health Insurance Portability and Accountability Act of 1996, and the Foreign Account Tax Compliance Act have created additional administrative and compliance requirements for us.

The areas in which we provide outsourcing and consulting services are also the subject of government regulation, which is constantly evolving. Changes in government regulations in the United States affecting the value, use or delivery of benefits and human resources programs, including changes in regulations relating to health and welfare (such as medical) plans, defined contribution (such as 401(k)) plans, defined benefit (such as pension) plans or payroll delivery, may adversely affect the demand for, or profitability of, our services. Recently, we have seen regulatory initiatives result in companies either discontinuing their defined benefit programs or de-emphasizing the importance such programs play in the overall mix of their benefit programs with a trend toward increased use of defined contribution plans. If organizations discontinue or de-emphasize defined benefit plans more rapidly than we anticipate, the results of our business could be adversely affected.

In June 2012, the U.S. Supreme Court upheld the constitutionality of portions of the U.S. government enacted health care reform legislation, including portions that will impact how our clients offer health care to their employees. We have made significant investments in product development to assist clients in de-risking their health benefits and migrate then towards a defined contribution versus a defined benefit. Depending on future changes to health legislation, these investments may not yield returns. In addition, if we are unable to adapt our services to changes resulting from these laws and any subsequent regulations, our ability to grow our business or to provide effective services, particularly in the HR Solutions segment, could be negatively impacted. Furthermore, if our clients reduce the role or extent of employer-sponsored health care in response to the newly enacted legislation, our results of operations could be adversely impacted.

With respect to our international operations, we are subject to various regulations relating to, among other things, licensing, currency, policy language and terms, reserves and the amount of local investment. These various regulations also add to our cost of doing business through increased compliance expenses and increased training and employee expenses. In connection with our proposed reorganization under a newly formed holding company incorporated in the U.K. for example, we may incur increased costs from complying with additional local regulations and requirements such as those arising under the U.K. Companies Act. Furthermore, the loss of a license in a particular jurisdiction could restrict or eliminate our ability to conduct business in that jurisdiction.

In all jurisdictions, the applicable laws and regulations are subject to amendment or interpretation by regulatory authorities. Generally, such authorities are vested with relatively broad discretion to grant, renew and revoke licenses and approvals and to implement regulations. Accordingly, we may be precluded or temporarily suspended from carrying on some or all of our activities or otherwise fined or penalized in a given jurisdiction. No assurances can be given that our business can continue to be conducted in any given jurisdiction as it has been conducted in the past.

In addition, new regulatory or industry developments could create an increase in competition that could adversely affect us. These developments include:

·the selling of insurance by insurance companies directly to insureds;

·changes in our business compensation model as a result of regulatory actions or changes;

·the establishment of programs in which state-sponsored entities provide property insurance in catastrophe prone areas or  other alternative types of coverage;

·changes in regulations relating to health and welfare plans, defined contribution plans or defined benefit plans; or

·additional regulations promulgated by the FSA in the U.K., or other regulatory bodies in jurisdictions in which we operate.

Changes in the regulatory scheme, or even changes in how existing regulations are interpreted, could have an adverse impact on our results of operations by limiting revenue streams or increasing costs of compliance. Likewise, increased government involvement in the insurance or reinsurance markets could curtail or replace our opportunities and negatively affect our results of operations and financial condition.

58

ITEM 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

(a)  None.

(b)  None.

(c)  Issuer Purchases of Equity Securities.

The following information relates to the repurchase of equity securities by Aon or any affiliated purchaser during each month within the third quarter of 2012:

Period	Total Number of Shares Purchased	Average Price Paid per Share (1)		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs (1)  (2)
7/1/12 — 7/31/12	—	$	—	—	$	4,750,046,975
8/1/12 — 8/31/12	5,350,671	51.37		5,350,671	4,475,157,471
9/1/12 — 9/30/12	—	—		—	4,475,157,471
Total	5,350,671	$	51.37	5,350,671	4,475,157,471

(1)Does not include commissions paid to repurchase shares.

(2)   In January 2010, our Board of Directors authorized a new share repurchase program under which up to $2 billion of common stock were authorized to be repurchased from time to time depending on market conditions or other factors through open market or privately negotiated transactions. During the first quarter of 2012, we repurchased 2.1 million shares through this program through the open market or in privately negotiated transactions. As a result of the Redomestication, the 2010 share Repurchase Plan, which related to common stock of Aon Corporation, was no longer of effect. In April 2012, our Board of Directors authorized a share repurchase program under which up to $5 billion of Class A ordinary shares may be repurchased. Under this program, shares may be repurchased through the open market or in privately negotiated transactions, from time to time, based on prevailing market conditions, and will be funded from available capital. During the third quarter of 2012, we repurchased 5.4 million shares through this program through the open market or in privately negotiated transactions.

ITEM 6.EXHIBITS

Exhibits — The exhibits filed with this report are listed on the attached Exhibit Index.

59

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Aon plc
	(Registrant)
October 31, 2012	By:	/s/ Laurel Meissner
	LAUREL MEISSNER
	SENIOR VICE PRESIDENT AND
	GLOBAL CONTROLLER
	(Principal Accounting Officer and duly authorized officer of Registrant)

60

Exhibit Index

ExhibitNumber	Description of Exhibit
12.1	Statement regarding Computation of Ratio of Earnings to Fixed Charges.
31.1	Certification of CEO.
31.2	Certification of CFO.
32.1	Certification of CEO Pursuant to section 1350 of Title 18 of the United States Code.
32.2	Certification of CFO Pursuant to section 1350 of Title 18 of the United States Code.
101	Interactive Data Files. The following materials are filed electronically with this Quarterly Report on Form 10-Q:
	101.INS XBRL Report Instance Document
	101.SCH XBRL Taxonomy Extension Schema Document
	101.CAL XBRL Taxonomy Calculation Linkbase Document
	101.DEF XBRL Taxonomy Definition Linkbase Document
	101.PRE XBRL Taxonomy Presentation Linkbase Document
	101.LAB XBRL Taxonomy Calculation Linkbase Document

61

EX-12.1

Exhibit 12.1

Aon plc and Consolidated Subsidiaries

Combined With Unconsolidated Subsidiaries

Computation of Ratio of Earnings to Fixed Charges

	Nine Months Ended
	September 30					Years Ended December 31,
(millions except ratio)	2012		2011			2011		2010			2009		2008		2007
Income from continuing operations before income taxes and noncontrolling interests	$	971	$	1,000		$	1,384	$	1,059		$	949	$	879	$	1,023
Less: Equity in earnings on less than 50% owned entities	8		(7		)	7		10			11		5		6
Add back fixed charges:
Interest on indebtedness	173		186			245		182			122		126		138
Interest on uncertain tax positions	3		1			—		(1		)	2		—		2
Portion of rents representative of interest factor	27		37			55		48			48		47		75
Income as adjusted	$	1,166	$	1,231		$	1,677	$	1,278		$	1,110	$	1,047	$	1,232
Fixed charges:
Interest on indebtedness	$	173	$	186		$	245	$	182		$	122	$	126	$	138
Interest on uncertain tax positions	3		1			—		(1		)	2		—		2
Portion of rents representative of interest factor	27		37			55		48			48		47		75
Total fixed charges	$	203	$	224		$	300	$	229		$	172	$	173	$	215
Ratio of earnings to fixed charges	5.7		5.5			5.6		5.6			6.5		6.1		5.7

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Gregory C. Case, the Chief Executive Officer of Aon plc, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Aon plc;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 31, 2012	/s/ Gregory C. Case
	Gregory C. Case
	Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Christa Davies, the Chief Financial Officer of Aon plc, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Aon plc;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 31, 2012	/s/ Christa Davies
	Christa Davies
	Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

I, Gregory C. Case, the Chief Executive Officer of Aon plc (the “Company”), certify that (i) the Quarterly Report on Form 10-Q of the Company for the quarter ended September 30, 2012 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Gregory C. Case

Gregory C. Case

Chief Executive Officer

October 31, 2012

EX-32.2

Exhibit 32.2

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

I, Christa Davies, the Chief Financial Officer of Aon plc (the “Company”), certify that (i) the Quarterly Report on Form 10-Q of the Company for the quarter ended September 30, 2012 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Christa Davies

Christa Davies

Chief Financial Officer

October 31, 2012

XML

Cash and Cash Equivalents (Details) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 USD ($) Y M	Sep. 30, 2012 GBP (£) Y M	Dec. 31, 2011 USD ($)
Cash and Cash Equivalents.
Short-term investment, minimum maturity period (in months/year)	3	3
Short-term investment, maximum maturity period (in months/year)	1	1
Operating funds in U.K.	$ 124	£ 77	$ 120
Cash and cash equivalents, restricted	$ 88		$ 71

XML

Share-Based Compensation Plans (Details 3) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Y	Sep. 30, 2011
Share Options
Closing share price (in dollars per share)	$ 52.29		$ 52.29
Aggregate intrinsic value of options outstanding	$ 131		$ 131
Aggregate intrinsic value of exercisable options outstanding	125		125
Aggregate intrinsic value of share options exercised	23	4	47	69
Cash received from the exercise of share options	29	8	80	129
Tax benefit realized from the exercise of share options	5		8	12
Unamortized deferred compensation expense	$ 329		$ 329
Remaining weighted-average amortization period (in years)			2.1

XML

Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		9 Months Ended		9 Months Ended
	Sep. 30, 2012 Commercial paper	Sep. 30, 2012 Commercial paper	Dec. 31, 2011 Commercial paper	Sep. 30, 2012 Revolving Credit Agreement	Mar. 20, 2012 Revolving Credit Agreement	Sep. 30, 2012 Revolving Credit Agreement Minimum	Sep. 30, 2012 Revolving Credit Agreement Maximum	Sep. 30, 2012 Revolving Credit Agreement LIBOR	Sep. 30, 2012 Revolving Credit Agreement Federal Funds rate	Sep. 30, 2012 Revolving Credit Agreement Prime rate	Sep. 30, 2012 Revolving Credit Agreement One month Eurodollar rate	Sep. 30, 2012 3.125% Senior notes due 2016	Sep. 30, 2012 8.205% Junior subordinated deferrable interest debentures due January 2027	Sep. 30, 2012 5.00% Senior notes due September 2020	Sep. 30, 2012 3.50% senior notes due September 2015	Sep. 30, 2012 6.25% Senior notes due September 2040	Sep. 30, 2012 7.375% Debt securities due December 2012
Debt Instrument
Total debt			$ 50
Weighted average commercial paper outstanding	15.0	41.0
Weighted-average interest rates (as a percent)	0.52%	0.51%
New credit and loan facility					$ 400
Term of credit agreement				5 years
Debt instrument base interest rate								LIBOR	Federal fund effective rate	Prime rate	One month Eurodollar rate
Debt Instrument, Variable Rate (as a percent)									0.50%		1.00%	3.125%	8.205%	5.00%	3.50%	6.25%	7.375%
Ratio of consolidated funded debt to consolidated adjusted EBITDA						0.0300	0.0325

XML

Derivatives and Hedging (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Interest Rate Risk Management
Collateral received from counterparties	6
Cash flow hedges
Foreign Exchange Risk Management
Foreign currency exposures, maximum average hedging period	2 years
Foreign currency exposures, maximum hedging period	5 years
Interest Rate Risk Management
Interest rate fluctuations, maximum hedging period	2 years
Net investment hedges
Foreign Exchange Risk Management
Foreign currency exposures, maximum hedging period	2 years
Not designated as hedging instrument
Foreign Exchange Risk Management
Foreign currency exposures, maximum hedging period	1 year

XML

Restructuring (Details 2) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Restructuring Reserve
Beginning balance	$ 173
Expensed	64
Cash payments	(109)
Foreign exchange translation and other	3
Ending balance	131
Aon Hewitt Restructuring Plan
Restructuring Reserve
Beginning balance	95
Expensed	56
Cash payments	(71)
Ending balance	80
Aon Benfield Restructuring Plan
Restructuring Reserve
Beginning balance	20
Expensed	8
Cash payments	(20)
Foreign exchange translation and other	1
Ending balance	9
2007 Restructuring Plan
Restructuring Reserve
Beginning balance	50
Cash payments	(15)
Foreign exchange translation and other	2
Ending balance	37
Other Restructuring Plan
Restructuring Reserve
Beginning balance	8
Cash payments	(3)
Ending balance	$ 5

XML

Share-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2012

Share-Based Compensation Plans

Share-based compensation expense recognized in continuing operations

	Threemonthsended				Ninemonthsended
	September30,				September30,
(in millions)	2012		2011		2012		2011
Restricted stock units ("RSUs")	$	37	$	31	$	120	$	108
Performance share awards ("PSAs")	15		24		30		59
Stock options	1		2		4		7
Employee stock purchase plans	2		2		6		5
Total stock-based compensation expense	$	55	$	59	$	160	$	179

Restricted share unit activity

	NinemonthsendedSeptember30,
	2012				2011
(shares in thousands)	Shares		Fair Value(1)		Shares		Fair Value(1)
Non-vested at beginning of period	9,916		$	42	10,674		$	38
Granted	4,888		46		3,366		51
Vested	(3,343	)	42		(3,385	)	39
Forfeited	(516	)	44		(410	)	39
Non-vested at end of period	10,945		44		10,245		42

(1)Represents per share weighted average fair value of award at date of grant

Performance-based plans

(shares in thousands, dollars in millions, except fair value)	Asof September30, 2012		As of December 31,2011		As of December 31, 2010
Target PSAs granted	1,369		1,715		1,390
Fair value (1)	$	47	$	50	$	39
Number of shares that would be issued based on current performance levels	1,367		1,131		1,241
Unamortized expense, based on current performance levels	$	52	$	25	$	4

(1)Represents per share weighted average fair value of award at date of grant.

Share options and related information

	NinemonthsendedSeptember30,
	2012				2011
(shares in thousands)	Shares		Weighted-Average ExercisePrice		Shares		Weighted-Average ExercisePrice
Beginning outstanding	9,116		$	32	13,919		$	32
Granted	-		-		80		53
Exercised	(2,570	)	31		(3,781	)	32
Forfeited and expired	(67	)	37		(300	)	37
Outstanding at end of period	6,479		32		9,918		32
Exercisable at end of period	5,969		31		8,566		30

Other information related to the company's share options

	Threemonthsended				Ninemonthsended
	September30,				September30,
(in millions)	2012		2011		2012		2011
Aggregate intrinsic value of stock options exercised	$	23	$	4	$	47	$	69
Cash received from the exercise of stock options	29		8		80		129
Tax benefit realized from the exercise of stock options	5		-		8		12

XML

Derivatives and Hedging (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income on Derivative	$ 8	$ (11)	$ 8	$ (13)
Estimated pretax losses currently included within Accumulated Other Comprehensive Loss that will be reclassified to earnings in next twelve months	18		18
Derivatives accounted for as hedges: | Cash flow hedges
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) recognized in Accumulated Other Comprehensive Loss	16	(9)	(14)	(32)
Amount of Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into income (effective portion)	(7)	3	(23)	(11)
Interest rate contracts | Derivatives accounted for as hedges: | Cash flow hedges
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) recognized in Accumulated Other Comprehensive Loss		1		(1)
Amount of Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into income (effective portion)				1
Foreign exchange contracts | Derivatives accounted for as hedges: | Cash flow hedges
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) recognized in Accumulated Other Comprehensive Loss	16	(10)	(14)	(31)
Amount of Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into income (effective portion)	(7)	3	(23)	(12)
Foreign exchange contracts | Derivatives accounted for as hedges: | Net Investment Hedges
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) recognized in Accumulated Other Comprehensive Loss	3	13	4	(4)
Foreign exchange contracts | Derivatives accounted for as hedges: | Fair value hedges
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income on Derivative	(3)	2
Amount of Gain (Loss) Recognized in Income on Related Hedged Item	3	(3)		1
Foreign exchange contracts | Derivatives not accounted for as hedges:
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income on Derivative	$ 6	$ (9)	$ 12	$ (9)

XML

Guarantee of Registered Securities

9 Months Ended

Sep. 30, 2012

Guarantee of Registered Securities

Guarantee of Registered Securities

18.  Guarantee of Registered Securities

As described in Note 15, in connection with the Redomestication, on April 2, 2012, Aon plc (“Parent Guarantor”) entered into various agreements pursuant to which it agreed to guarantee the obligations of Aon Corporation (“Subsidiary Issuer”) arising under issued and outstanding debt securities. Aon Corporation is a 100% indirectly owned subsidiary of Aon plc. The debt securities that are subject to Rule 3-10 of Regulation S-X are the 7.375% debt securities due December 2012, the 3.50% senior notes due September 2015, the 3.125% senior notes due May 2016, the 5.00% senior notes due September 2020, the 8.205% junior subordinated deferrable interest debentures due January 2027 and the 6.25% senior notes due September 2040. All guarantees of Aon plc are full and unconditional. There are no subsidiaries of Aon plc that are guarantors of the debt.

The following tables set forth condensed consolidating statements of income for the three and nine months ended September 30, 2012 and 2011, condensed consolidating statements of comprehensive income for the three and nine months ended September 30, 2012 and 2011, condensed consolidating statements of financial position as of September 30, 2012 and December 31, 2011, and condensed consolidating statements of cash flows for the nine months ended September 30, 2012 and 2011 in accordance with Rule 3-10 of Regulation S-X. The condensed consolidating financial information includes the accounts of Aon plc, the accounts of Aon Corporation, and the combined accounts of the non-guarantor subsidiaries. The condensed consolidating financial statements are presented in all periods as a merger under common control, with Aon plc presented as the Parent Guarantor in all periods prior and subsequent to the Redomestication. The principal consolidating adjustments are to eliminate the investment in subsidiaries and intercompany balances and transactions.

Condensed Consolidating Statement of Income

	Three Months Ended September 30, 2012
							Other
	Parent			Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	2,726		$	—		$	2,726
Fiduciary investment income	—			—			11			—			11
Total revenue	—			—			2,737			—			2,737
Expenses
Compensation and benefits	34			(11		)	1,597			—			1,620
Other general expenses	19			6			753			—			778
Total operating expenses	53			(5		)	2,350			—			2,398
Operating (loss) income	(53		)	5			387			—			339
Interest income	—			—			1			—			1
Interest expense	—			(44		)	(13		)	—			(57		)
Intercompany interest (expense) income	(8		)	48			(40		)	—			—
Other income (expense)	—			10			(19		)	—			(9		)
(Loss) income from continuing operations before taxes	(61		)	19			316			—			274
Income tax (benefit) expense	(15		)	11			68			—			64
(Loss) income from continuing operations	(46		)	8			248			—			210
Loss from discontinued operations before taxes	—			—			—			—			—
Income taxes	—			—			—			—			—
Loss from discontinued operations	—			—			—			—			—
Equity in earnings of subsidiaries, net of tax	250			209			217			(676		)	—
Net income	204			217			465			(676		)	210
Less: Net income attributable to noncontrolling interests	—			—			6			—			6
Net income attributable to Aon shareholders	$	204		$	217		$	459		$	(676	)	$	204

Condensed Consolidating Statement of Income

	Three Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—	$	—		$	2,708		$	—		$	2,708
Fiduciary investment income	—		—			15			—			15
Total revenue	—		—			2,723			—			2,723
Expenses
Compensation and benefits	—		(2		)	1,636			—			1,634
Other general expenses	—		20			741			—			761
Total operating expenses	—		18			2,377			—			2,395
Operating (loss) income	—		(18		)	346			—			328
Interest income	—		—			4			—			4
Interest expense	—		(40		)	(20		)	—			(60		)
Intercompany interest income (expense)	—		47			(47		)	—			—
Other income	—		—			20			—			20
(Loss) income from continuing operations before taxes	—		(11		)	303			—			292
Income tax (benefit) expense	—		(3		)	87			—			84
(Loss) income from continuing operations	—		(8		)	216			—			208
Income from discontinued operations before taxes	—		—			—			—			—
Income tax benefit	—		—			—			—			—
Income from discontinued operations	—		—			—			—			—
Equity in earnings of subsidiaries, net of tax	198		174			166			(538		)	—
Net income	198		166			382			(538		)	208
Less: Net income attributable to noncontrolling interests	—		—			10			—			10
Net income attributable to Aon shareholders	$	198	$	166		$	372		$	(538	)	$	198

Condensed Consolidating Statement of Income

	Nine Months Ended September 30, 2012
							Other
	Parent			Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	8,368		$	—		$	8,368
Fiduciary investment income	—			—			31			—			31
Total revenue	—			—			8,399			—			8,399
Expenses
Compensation and benefits	18			22			4,880			—			4,920
Other general expenses	21			26			2,297			—			2,344
Total operating expenses	39			48			7,177			—			7,264
Operating (loss) income	(39		)	(48		)	1,222			—			1,135
Interest income	—			1			5			—			6
Interest expense	—			(124		)	(49		)	—			(173		)
Intercompany interest (expense) income	(10		)	140			(130		)	—			—
Other income	—			12			(9		)	—			3
(Loss) income from continuing operations before taxes	(49		)	(19		)	1,039			—			971
Income tax (benefit) expense	—			(4		)	261			—			257
(Loss) income from continuing operations	(49		)	(15		)	778			—			714
Loss from discontinued operations before taxes	—			—			(1		)	—			(1		)
Income taxes	—			—			—			—			—
Loss from discontinued operations	—			—			(1		)	—			(1		)
Equity in earnings of subsidiaries, net of tax	737			662			647			(2,046		)	—
Net income	688			647			1,424			(2,046		)	713
Less: Net income attributable to noncontrolling interest	—			—			25			—			25
Net income attributable to Aon shareholders	$	688		$	647		$	1,399		$	(2,046	)	$	688

Condensed Consolidating Statement of Income

	Nine Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—	$	—		$	8,255		$	—		$	8,255
Fiduciary investment income	—		2			36			—			38
Total revenue	—		2			8,291			—			8,293
Expenses
Compensation and Benefits	—		(7		)	4,850			—			4,843
Other general expenses	—		40			2,245			—			2,284
Total operating expenses	—		33			7,095			—			7,127
Operating (loss) income	—		(31		)	1,196			—			1,166
Interest income	—		4			10			—			14
Interest expense	—		(131		)	(55		)	—			(186		)
Intercompany interest income (expense)	—		135			(135		)	—			—
Other (expense) income	—		(27		)	33			—			6
(Loss) income from continuing operations before taxes	—		(50		)	1,049			—			1,000
Income tax (benefit) expense	—		(18		)	292			—			274
(Loss) income from continuing operations	—		(32		)	757			—			726
Income from discontinued operations before taxes	—		5			—			—			5
Income tax expense	—		1			—			—			1
Income from discontinued operations	—		4			—			—			4
Equity in earnings of subsidiaries, net of tax	702		628			600			(1,930		)	—
Net income	702		600			1,357			(1,930		)	730
Less: Net income attributable to noncontrolling interests	—		—			28			—			28
Net income attributable to Aon shareholders	$	702	$	600		$	1,329		$	(1,930	)	$	702

Condensed Consolidating Statement of Comprehensive Income

	Three Months Ended September 30, 2012
					Other
	Parent		Subsidiary		Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer		Subsidiaries			Adjustments			Consolidated
Net income	$	204	$	217	$	465		$	(676	)	$	210
Less: Net income attributable to noncontrolling interests	—		—		6			—			6
Net income attributable to Aon shareholders	$	204	$	217	$	459		$	(676	)	$	204
Other comprehensive loss, net of tax:
Change in fair value of derivatives	—		1		14			—			15
Foreign currency translation adjustments	—		17		147			—			164
Post-retirement benefit obligation	—		9		(2		)	—			7
Total other comprehensive income (loss)	—		27		159			—			186
Equity in other comprehensive (loss) income of subsidiaries, net of tax	182		155		182			(519		)	—
Less: Other comprehensive loss attributable to noncontrolling interests	—		—		4			—			4
Total other comprehensive loss attributable to Aon shareholders	182		182		337			(519		)	182
Comprehensive income (loss) attributable to Aon shareholders	$	386	$	399	$	796		$	(1,195	)	$	386

Condensed Consolidating Statement of Comprehensive Income

	Three Months Ended September 30, 2011
							Other
	Parent			Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments			Consolidated
Net income	$	198		$	166		$	382		$	(538	)	$	208
Less: Net income attributable to noncontrolling interests	—			—			10			—			10
Net income attributable to Aon shareholders	$	198		$	166		$	372		$	(538	)	$	198
Other comprehensive income, net of tax:
Change in fair value of derivatives	—			—			(9		)	—			(9		)
Foreign currency translation adjustments	—			(5		)	(204		)	—			(209		)
Post-retirement benefit obligation	—			4			11			—			15
Total other comprehensive (loss) income	—			(1		)	(202		)	—			(203		)
Equity in other comprehensive income (loss) of subsidiaries, net of tax	(202		)	(201		)	(202		)	605			—
Less: Other comprehensive income attributable to noncontrolling interests	—			—			(1		)	—			(1		)
Total other comprehensive income attributable to Aon shareholders	(202		)	(202		)	(403		)	605			(202		)
Comprehensive income attributable to Aon Shareholders	$	(4	)	$	(36	)	$	(31	)	$	67		$	(4	)

Condensed Consolidating Statement of Comprehensive Income

	Nine Months Ended September 30, 2012
(millions)	Parent Guarantor		Subsidiary Issuer		Other Non-Guarantor Subsidiaries		Consolidating Adjustments			Consolidated
Net income	$	688	$	647	$	1,424	$	(2,046	)	$	713
Less: Net income attributable to noncontrolling interests	—		—		25		—			25
Net income attributable to Aon shareholders	$	688	$	647	$	1,399	$	(2,046	)	$	688
Other comprehensive loss, net of tax:
Change in fair value of derivatives	—		1		4		—			5
Foreign currency translation adjustments	—		16		55		—			71
Post-retirement benefit obligation	—		24		22		—			46
Total other comprehensive income (loss)	—		41		81		—			122
Equity in other comprehensive (loss) income of subsidiaries, net of tax	120		78		119		(317		)	—
Less: Other comprehensive loss attributable to noncontrolling interests	—		—		2		—			2
Total other comprehensive loss attributable to Aon shareholders	120		119		198		(317		)	120
Comprehensive income attributable to Aon shareholders	$	808	$	766	$	1,597	$	(2,363	)	$	808

Condensed Consolidating Statement of Comprehensive Income

	Nine Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments			Consolidated
Net income	$	702	$	600		$	1,357		$	(1,930	)	$	730
Less: Net income attributable to noncontrolling interests	—		—			28			—			28
Net income attributable to Aon shareholders	$	702	$	600		$	1,329		$	(1,930	)	$	702
Other comprehensive income, net of tax:
Change in fair value of derivatives	—		(1		)	(13		)	—			(14		)
Foreign currency translation adjustments	—		(9		)	(3		)	—			(12		)
Post-retirement benefit obligation	—		13			29			—			42
Total other comprehensive (loss) income	—		3			13			—			16
Equity in other comprehensive income (loss) of subsidiaries, net of tax	17		12			15			(44		)	—
Less: Other comprehensive income attributable to noncontrolling interests	—		—			(1		)	—			(1		)
Total other comprehensive income attributable to Aon shareholders	17		15			29			(44		)	17
Comprehensive income attributable to Aon shareholders	$	719	$	615		$	1,358		$	(1,974	)	$	719

Condensed Consolidating Statement of Financial Position

	September 30, 2012
					Other
	Parent		Subsidiary		Non-Guarantor		Consolidating
(millions)	Guarantor		Issuer		Subsidiaries		Adjustments			Consolidated
ASSETS
Cash and cash equivalents	$	1	$	58	$	231	$	—		$	290
Short-term investments	16		261		441		—			718
Receivables, net	—		2		2,957		—			2,959
Fiduciary assets	—		—		11,343		—			11,343
Intercompany receivables	—		1,677		2,868		(4,545		)	—
Other current assets	—		41		351		—			392
Total Current Assets	17		2,039		18,191		(4,545		)	15,702
Goodwill	—		—		8,856		—			8,856
Intangible assets, net	—		—		3,040		—			3,040
Fixed assets, net	—		—		814		—			814
Investments	—		41		119		—			160
Intercompany receivables	—		2,240		2,171		(4,411		)	—
Other non-current assets	222		659		56		—			937
Investment in subsidiary	10,797		10,349		8,446		(29,592		)	—
TOTAL ASSETS	$	11,036	$	15,328	$	41,693	$	(38,548	)	$	29,509
LIABILITIES AND EQUITY
Fiduciary liabilities	$	—	$	—	$	11,343	$	—		$	11,343
Short-term debt and current portion of long-term debt	—		268		23		—			291
Accounts payable and accrued liabilities	4		86		1,429		—			1,519
Intercompany payables	34		1,779		1,782		(3,595		)	—
Other current liabilities	—		47		754		—			801
Total Current Liabilities	38		2,180		15,331		(3,595		)	13,954
Long-term debt	—		3,030		1,081		—			4,111
Pension, other post retirement and other post employment liabilities	—		1,167		590		—			1,757
Intercompany payables	2,690		359		2,311		(5,360		)	—
Other non-current liabilities	3		146		1,177		—			1,326
TOTAL LIABILITIES	2,731		6,882		20,490		(8,955		)	21,148
TOTAL AON SHAREHOLDERS’ EQUITY	8,305		8,446		21,146		(29,592		)	8,305
Noncontrolling interests	—		—		56		—			56
TOTAL EQUITY	8,305		8,446		21,202		(29,592		)	8,361
TOTAL LIABILITIES AND EQUITY	$	11,036	$	15,328	$	41,692	$	(38,547	)	$	29,509

Condensed Consolidating Statement of Financial Position

	Dec. 31, 2011
						Other
	Parent		Subsidiary			Non-Guarantor		Consolidating
(millions)	Guarantor		Issuer			Subsidiaries		Adjustments			Consolidated
ASSETS
Cash and cash equivalents	$	—	$	(21	)	$	293	$	—		$	272
Short-term investments	—		321			464		—			785
Receivables, net	—		2			3,181		—			3,183
Fiduciary assets	—		—			10,838		—			10,838
Intercompany receivables	3		610			539		(1,152		)	—
Other current assets	—		57			378		(8		)	427
Total Current Assets	3		969			15,693		(1,160		)	15,505
Goodwill	—		—			8,770		—			8,770
Intangible assets, net	—		—			3,276		—			3,276
Fixed assets, net	—		—			783		—			783
Investments	—		39			200		—			239
Intercompany receivables	—		2,133			2,202		(4,335		)	—
Other non-current assets	—		900			781		(702		)	979
Investment in subsidiary	10,183		9,269			7,714		(27,166		)	—
TOTAL ASSETS	$	10,186	$	13,310		$	39,419	$	(33,363	)	$	29,552
LIABILITIES AND EQUITY
Fiduciary liabilities	$	—	$	—		$	10,838	$	—		$	10,838
Short-term debt and current portion of long-term debt	—		318			19		—			337
Accounts payable and accrued liabilities	—		78			1,758		(4		)	1,832
Intercompany payables	—		206			609		(815		)	—
Other current liabilities	—		5			752		(4		)	753
Total Current Liabilities	—		607			13,976		(823		)	13,760
Long-term debt	—		3,063			1,092		—			4,155
Pension, other post retirement and other post employment liabilities	—		1,407			785		—			2,192
Intercompany payables	2,108		378			2,186		(4,672		)	—
Other non-current liabilities	—		141			1,886		(702		)	1,325
TOTAL LIABILITIES	2,108		5,596			19,925		(6,197		)	21,432
TOTAL AON SHAREHOLDERS’ EQUITY	8,078		7,714			19,452		(27,166		)	8,078
Noncontrolling interests	—		—			42		—			42
TOTAL EQUITY	8,078		7,714			19,494		(27,166		)	8,120
TOTAL LIABILITIES AND EQUITY	$	10,186	$	13,310		$	39,419	$	(33,363	)	$	29,552

Condensed Consolidating Statement of Cash Flows

	Nine Months Ended September 30, 2012
	Parent			Subsidiary			Other Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments		Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES
CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES	$	(46	)	$	(189	)	$	1,102		$	—	$	867
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	—			79			92			—		171
Purchase of long-term investments	—			(9		)	—			—		(9		)
Net sales of short-term investments - non-fiduciary	(16		)	61			21			—		66
Acquisition of businesses, net of cash acquired	—			(55		)	(42		)	—		(97		)
Proceeds from sale of businesses	—			—			2			—		2
Capital expenditures	—			—			(201		)	—		(201		)
CASH PROVIDED BY (USED FOR) INVESTING ACTIVITIES	(16		)	76			(128		)	—		(68		)
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(525		)	(100		)	—			—		(625		)
Advances from (to) affiliates	648			376			(1,024		)	—		—
Issuance of shares for employee benefit plans	44			49			—			—		93
Issuance of debt	—			332			1			—		333
Repayment of debt	—			(416		)	(11		)	—		(427		)
Cash dividends to shareholders	(104		)	(49		)	—			—		(153		)
Purchase of shares from noncontrolling interests	—			—			—			—		—
Dividends paid to noncontrolling interests	—			—			(17		)	—		(17		)
CASH PROVIDED BY (USED FOR) FINANCING ACTIVITIES	63			192			(1,051		)	—		(796		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			15			—		15
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1			79			(62		)	—		18
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	—			(21		)	293			—		272
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	1		$	58		$	231		$	—	$	290

Condensed Consolidating Statement of Cash Flows

	Nine Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments		Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES
CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES	$	—	$	(137	)	$	924		$	—	$	787
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	—		52			51			—		103
Purchase of long-term investments	—		(17		)	(11		)	—		(28		)
Net sales of short-term investments - non-fiduciary			329			(153		)			176
Acquisition of businesses, net of cash acquired	—		(10		)	(92		)	—		(102		)
Proceeds from sale of businesses	—		5			4			—		9
Capital expenditures	—		—			(151		)	—		(151		)
CASH PROVIDED BY (USED FOR) INVESTING ACTIVITIES	—		359			(352		)	—		7
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	—		(828		)	—			—		(828		)
Advances from (to) affiliates	—		487			(487		)	—		—
Issuance of shares for employee benefit plans	—		165			—			—		165
Issuance of debt	—		1,190			382			—		1,572
Repayment of debt	—		(1,126		)	(397		)	—		(1,523		)
Cash dividends to shareholders	—		(150		)	—			—		(150		)
Purchase of shares from noncontrolling interests	—		—			(24		)	—		(24		)
Dividends paid to noncontrolling interests	—		—			(21		)	—		(21		)
CASH USED FOR FINANCING ACTIVITIES	—		(262		)	(547		)	—		(809		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—		—			(36		)	—		(36		)
NET DECREASE IN CASH AND CASH EQUIVALENTS	—		(40		)	(11		)	—		(51		)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	—		14			332			—		346
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	—	$	(26	)	$	321		$	—	$	295

XML

Shareholders' Equity (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accumulated other comprehensive loss
Net derivative losses	$ (32)	$ (37)
Net foreign exchange translation adjustments	193	124
Net postretirement benefit obligations	(2,411)	(2,457)
Accumulated other comprehensive loss, net of tax	$ (2,250)	$ (2,370)

XML

Acquisitions and Dispositions (Details 2) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 item	Sep. 30, 2011 item
Dispositions
Pretax gain (loss) recognized on sale of businesses	1
Risk Solutions
Dispositions
Number of dispositions	2	2
Pretax gain (loss) recognized on sale of businesses		$ (2)
HR Solutions
Dispositions
Number of dispositions	1

XML

Guarantee of Registered Securities (Tables)

9 Months Ended

Sep. 30, 2012

Guarantee of Registered Securities

Results of Operations

Condensed Consolidating Statement of Income

	Three Months Ended September 30, 2012
							Other
	Parent			Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	2,726		$	—		$	2,726
Fiduciary investment income	—			—			11			—			11
Total revenue	—			—			2,737			—			2,737
Expenses
Compensation and benefits	34			(11		)	1,597			—			1,620
Other general expenses	19			6			753			—			778
Total operating expenses	53			(5		)	2,350			—			2,398
Operating (loss) income	(53		)	5			387			—			339
Interest income	—			—			1			—			1
Interest expense	—			(44		)	(13		)	—			(57		)
Intercompany interest (expense) income	(8		)	48			(40		)	—			—
Other income (expense)	—			10			(19		)	—			(9		)
(Loss) income from continuing operations before taxes	(61		)	19			316			—			274
Income tax (benefit) expense	(15		)	11			68			—			64
(Loss) income from continuing operations	(46		)	8			248			—			210
Loss from discontinued operations before taxes	—			—			—			—			—
Income taxes	—			—			—			—			—
Loss from discontinued operations	—			—			—			—			—
Equity in earnings of subsidiaries, net of tax	250			209			217			(676		)	—
Net income	204			217			465			(676		)	210
Less: Net income attributable to noncontrolling interests	—			—			6			—			6
Net income attributable to Aon shareholders	$	204		$	217		$	459		$	(676	)	$	204

Condensed Consolidating Statement of Income

	Three Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—	$	—		$	2,708		$	—		$	2,708
Fiduciary investment income	—		—			15			—			15
Total revenue	—		—			2,723			—			2,723
Expenses
Compensation and benefits	—		(2		)	1,636			—			1,634
Other general expenses	—		20			741			—			761
Total operating expenses	—		18			2,377			—			2,395
Operating (loss) income	—		(18		)	346			—			328
Interest income	—		—			4			—			4
Interest expense	—		(40		)	(20		)	—			(60		)
Intercompany interest income (expense)	—		47			(47		)	—			—
Other income	—		—			20			—			20
(Loss) income from continuing operations before taxes	—		(11		)	303			—			292
Income tax (benefit) expense	—		(3		)	87			—			84
(Loss) income from continuing operations	—		(8		)	216			—			208
Income from discontinued operations before taxes	—		—			—			—			—
Income tax benefit	—		—			—			—			—
Income from discontinued operations	—		—			—			—			—
Equity in earnings of subsidiaries, net of tax	198		174			166			(538		)	—
Net income	198		166			382			(538		)	208
Less: Net income attributable to noncontrolling interests	—		—			10			—			10
Net income attributable to Aon shareholders	$	198	$	166		$	372		$	(538	)	$	198

Condensed Consolidating Statement of Income

	Nine Months Ended September 30, 2012
							Other
	Parent			Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	8,368		$	—		$	8,368
Fiduciary investment income	—			—			31			—			31
Total revenue	—			—			8,399			—			8,399
Expenses
Compensation and benefits	18			22			4,880			—			4,920
Other general expenses	21			26			2,297			—			2,344
Total operating expenses	39			48			7,177			—			7,264
Operating (loss) income	(39		)	(48		)	1,222			—			1,135
Interest income	—			1			5			—			6
Interest expense	—			(124		)	(49		)	—			(173		)
Intercompany interest (expense) income	(10		)	140			(130		)	—			—
Other income	—			12			(9		)	—			3
(Loss) income from continuing operations before taxes	(49		)	(19		)	1,039			—			971
Income tax (benefit) expense	—			(4		)	261			—			257
(Loss) income from continuing operations	(49		)	(15		)	778			—			714
Loss from discontinued operations before taxes	—			—			(1		)	—			(1		)
Income taxes	—			—			—			—			—
Loss from discontinued operations	—			—			(1		)	—			(1		)
Equity in earnings of subsidiaries, net of tax	737			662			647			(2,046		)	—
Net income	688			647			1,424			(2,046		)	713
Less: Net income attributable to noncontrolling interest	—			—			25			—			25
Net income attributable to Aon shareholders	$	688		$	647		$	1,399		$	(2,046	)	$	688

Condensed Consolidating Statement of Income

	Nine Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—	$	—		$	8,255		$	—		$	8,255
Fiduciary investment income	—		2			36			—			38
Total revenue	—		2			8,291			—			8,293
Expenses
Compensation and Benefits	—		(7		)	4,850			—			4,843
Other general expenses	—		40			2,245			—			2,284
Total operating expenses	—		33			7,095			—			7,127
Operating (loss) income	—		(31		)	1,196			—			1,166
Interest income	—		4			10			—			14
Interest expense	—		(131		)	(55		)	—			(186		)
Intercompany interest income (expense)	—		135			(135		)	—			—
Other (expense) income	—		(27		)	33			—			6
(Loss) income from continuing operations before taxes	—		(50		)	1,049			—			1,000
Income tax (benefit) expense	—		(18		)	292			—			274
(Loss) income from continuing operations	—		(32		)	757			—			726
Income from discontinued operations before taxes	—		5			—			—			5
Income tax expense	—		1			—			—			1
Income from discontinued operations	—		4			—			—			4
Equity in earnings of subsidiaries, net of tax	702		628			600			(1,930		)	—
Net income	702		600			1,357			(1,930		)	730
Less: Net income attributable to noncontrolling interests	—		—			28			—			28
Net income attributable to Aon shareholders	$	702	$	600		$	1,329		$	(1,930	)	$	702

Condensed Consolidating Statement of Comprehensive Income

	Three Months Ended September 30, 2012
					Other
	Parent		Subsidiary		Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer		Subsidiaries			Adjustments			Consolidated
Net income	$	204	$	217	$	465		$	(676	)	$	210
Less: Net income attributable to noncontrolling interests	—		—		6			—			6
Net income attributable to Aon shareholders	$	204	$	217	$	459		$	(676	)	$	204
Other comprehensive loss, net of tax:
Change in fair value of derivatives	—		1		14			—			15
Foreign currency translation adjustments	—		17		147			—			164
Post-retirement benefit obligation	—		9		(2		)	—			7
Total other comprehensive income (loss)	—		27		159			—			186
Equity in other comprehensive (loss) income of subsidiaries, net of tax	182		155		182			(519		)	—
Less: Other comprehensive loss attributable to noncontrolling interests	—		—		4			—			4
Total other comprehensive loss attributable to Aon shareholders	182		182		337			(519		)	182
Comprehensive income (loss) attributable to Aon shareholders	$	386	$	399	$	796		$	(1,195	)	$	386

Condensed Consolidating Statement of Comprehensive Income

	Three Months Ended September 30, 2011
							Other
	Parent			Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments			Consolidated
Net income	$	198		$	166		$	382		$	(538	)	$	208
Less: Net income attributable to noncontrolling interests	—			—			10			—			10
Net income attributable to Aon shareholders	$	198		$	166		$	372		$	(538	)	$	198
Other comprehensive income, net of tax:
Change in fair value of derivatives	—			—			(9		)	—			(9		)
Foreign currency translation adjustments	—			(5		)	(204		)	—			(209		)
Post-retirement benefit obligation	—			4			11			—			15
Total other comprehensive (loss) income	—			(1		)	(202		)	—			(203		)
Equity in other comprehensive income (loss) of subsidiaries, net of tax	(202		)	(201		)	(202		)	605			—
Less: Other comprehensive income attributable to noncontrolling interests	—			—			(1		)	—			(1		)
Total other comprehensive income attributable to Aon shareholders	(202		)	(202		)	(403		)	605			(202		)
Comprehensive income attributable to Aon Shareholders	$	(4	)	$	(36	)	$	(31	)	$	67		$	(4	)

Condensed Consolidating Statement of Comprehensive Income

	Nine Months Ended September 30, 2012
(millions)	Parent Guarantor		Subsidiary Issuer		Other Non-Guarantor Subsidiaries		Consolidating Adjustments			Consolidated
Net income	$	688	$	647	$	1,424	$	(2,046	)	$	713
Less: Net income attributable to noncontrolling interests	—		—		25		—			25
Net income attributable to Aon shareholders	$	688	$	647	$	1,399	$	(2,046	)	$	688
Other comprehensive loss, net of tax:
Change in fair value of derivatives	—		1		4		—			5
Foreign currency translation adjustments	—		16		55		—			71
Post-retirement benefit obligation	—		24		22		—			46
Total other comprehensive income (loss)	—		41		81		—			122
Equity in other comprehensive (loss) income of subsidiaries, net of tax	120		78		119		(317		)	—
Less: Other comprehensive loss attributable to noncontrolling interests	—		—		2		—			2
Total other comprehensive loss attributable to Aon shareholders	120		119		198		(317		)	120
Comprehensive income attributable to Aon shareholders	$	808	$	766	$	1,597	$	(2,363	)	$	808

Condensed Consolidating Statement of Comprehensive Income

	Nine Months Ended September 30, 2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments			Consolidated
Net income	$	702	$	600		$	1,357		$	(1,930	)	$	730
Less: Net income attributable to noncontrolling interests	—		—			28			—			28
Net income attributable to Aon shareholders	$	702	$	600		$	1,329		$	(1,930	)	$	702
Other comprehensive income, net of tax:
Change in fair value of derivatives	—		(1		)	(13		)	—			(14		)
Foreign currency translation adjustments	—		(9		)	(3		)	—			(12		)
Post-retirement benefit obligation	—		13			29			—			42
Total other comprehensive (loss) income	—		3			13			—			16
Equity in other comprehensive income (loss) of subsidiaries, net of tax	17		12			15			(44		)	—
Less: Other comprehensive income attributable to noncontrolling interests	—		—			(1		)	—			(1		)
Total other comprehensive income attributable to Aon shareholders	17		15			29			(44		)	17
Comprehensive income attributable to Aon shareholders	$	719	$	615		$	1,358		$	(1,974	)	$	719

Balance Sheet

Condensed Consolidating Statement of Financial Position

	September30,2012
					Other
	Parent		Subsidiary		Non-Guarantor		Consolidating
(millions)	Guarantor		Issuer		Subsidiaries		Adjustments			Consolidated
ASSETS
Cash and cash equivalents	$	1	$	58	$	231	$	-		$	290
Short-term investments	16		261		441		-			718
Receivables, net	-		2		2,957		-			2,959
Fiduciary assets	-		-		11,343		-			11,343
Intercompany receivables	-		1,677		2,868		(4,545		)	-
Other current assets	-		41		351		-			392
Total Current Assets	17		2,039		18,191		(4,545		)	15,702
Goodwill	-		-		8,856		-			8,856
Intangible assets, net	-		-		3,040		-			3,040
Fixed assets, net	-		-		814		-			814
Investments	-		41		119		-			160
Intercompany receivables	-		2,240		2,171		(4,411		)	-
Other non-current assets	222		659		56		-			937
Investment in subsidiary	10,797		10,349		8,446		(29,592		)	-
TOTAL ASSETS	$	11,036	$	15,328	$	41,693	$	(38,548	)	$	29,509
LIABILITIES AND EQUITY
Fiduciary liabilities	$	-	$	-	$	11,343	$	-		$	11,343
Short-term debt and current portion of long-term debt	-		268		23		-			291
Accounts payable and accrued liabilities	4		86		1,429		-			1,519
Intercompany payables	34		1,779		1,782		(3,595		)	-
Other current liabilities	-		47		754		-			801
Total Current Liabilities	38		2,180		15,331		(3,595		)	13,954
Long-term debt	-		3,030		1,081		-			4,111
Pension, other post retirement and other post employment liabilities	-		1,167		590		-			1,757
Intercompany payables	2,690		359		2,311		(5,360		)	-
Other non-current liabilities	3		146		1,177		-			1,326
TOTAL LIABILITIES	2,731		6,882		20,490		(8,955		)	21,148
TOTAL AON SHAREHOLDERS' EQUITY	8,305		8,446		21,146		(29,592		)	8,305
Noncontrolling interests	-		-		56		-			56
TOTAL EQUITY	8,305		8,446		21,202		(29,592		)	8,361
TOTAL LIABILITIES AND EQUITY	$	11,036	$	15,328	$	41,692	$	(38,547	)	$	29,509

Condensed Consolidating Statement of Financial Position

	Dec.31,2011
						Other
	Parent		Subsidiary			Non-Guarantor		Consolidating
(millions)	Guarantor		Issuer			Subsidiaries		Adjustments			Consolidated
ASSETS
Cash and cash equivalents	$	-	$	(21	)	$	293	$	-		$	272
Short-term investments	-		321			464		-			785
Receivables, net	-		2			3,181		-			3,183
Fiduciary assets	-		-			10,838		-			10,838
Intercompany receivables	3		610			539		(1,152		)	-
Other current assets	-		57			378		(8		)	427
Total Current Assets	3		969			15,693		(1,160		)	15,505
Goodwill	-		-			8,770		-			8,770
Intangible assets, net	-		-			3,276		-			3,276
Fixed assets, net	-		-			783		-			783
Investments	-		39			200		-			239
Intercompany receivables	-		2,133			2,202		(4,335		)	-
Other non-current assets	-		900			781		(702		)	979
Investment in subsidiary	10,183		9,269			7,714		(27,166		)	-
TOTAL ASSETS	$	10,186	$	13,310		$	39,419	$	(33,363	)	$	29,552
LIABILITIES AND EQUITY
Fiduciary liabilities	$	-	$	-		$	10,838	$	-		$	10,838
Short-term debt and current portion of long-term debt	-		318			19		-			337
Accounts payable and accrued liabilities	-		78			1,758		(4		)	1,832
Intercompany payables	-		206			609		(815		)	-
Other current liabilities	-		5			752		(4		)	753
Total Current Liabilities	-		607			13,976		(823		)	13,760
Long-term debt	-		3,063			1,092		-			4,155
Pension, other post retirement and other post employment liabilities	-		1,407			785		-			2,192
Intercompany payables	2,108		378			2,186		(4,672		)	-
Other non-current liabilities	-		141			1,886		(702		)	1,325
TOTAL LIABILITIES	2,108		5,596			19,925		(6,197		)	21,432
TOTAL AON SHAREHOLDERS' EQUITY	8,078		7,714			19,452		(27,166		)	8,078
Noncontrolling interests	-		-			42		-			42
TOTAL EQUITY	8,078		7,714			19,494		(27,166		)	8,120
TOTAL LIABILITIES AND EQUITY	$	10,186	$	13,310		$	39,419	$	(33,363	)	$	29,552

Cash Flows

Condensed Consolidating Statement of Cash Flows

	NineMonthsEndedSeptember30,2012
	Parent			Subsidiary			Other Non-Guarantor			Consolidating
(millions)	Guarantor			Issuer			Subsidiaries			Adjustments		Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES
CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES	$	(46	)	$	(189	)	$	1,102		$	-	$	867
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	-			79			92			-		171
Purchase of long-term investments	-			(9		)	-			-		(9		)
Net sales of short-term investments - non-fiduciary	(16		)	61			21			-		66
Acquisition of businesses, net of cash acquired	-			(55		)	(42		)	-		(97		)
Proceeds from sale of businesses	-			-			2			-		2
Capital expenditures	-			-			(201		)	-		(201		)
CASH PROVIDED BY (USED FOR) INVESTING ACTIVITIES	(16		)	76			(128		)	-		(68		)
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(525		)	(100		)	-			-		(625		)
Advances from (to) affiliates	648			376			(1,024		)	-		-
Issuance of shares for employee benefit plans	44			49			-			-		93
Issuance of debt	-			332			1			-		333
Repayment of debt	-			(416		)	(11		)	-		(427		)
Cash dividends to shareholders	(104		)	(49		)	-			-		(153		)
Purchase of shares from noncontrolling interests	-			-			-			-		-
Dividends paid to noncontrolling interests	-			-			(17		)	-		(17		)
CASH PROVIDED BY (USED FOR) FINANCING ACTIVITIES	63			192			(1,051		)	-		(796		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	-			-			15			-		15
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1			79			(62		)	-		18
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	-			(21		)	293			-		272
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	1		$	58		$	231		$	-	$	290

Condensed Consolidating Statement of Cash Flows

	NineMonthsEndedSeptember30,2011
						Other
	Parent		Subsidiary			Non-Guarantor			Consolidating
(millions)	Guarantor		Issuer			Subsidiaries			Adjustments		Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES
CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES	$	-	$	(137	)	$	924		$	-	$	787
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	-		52			51			-		103
Purchase of long-term investments	-		(17		)	(11		)	-		(28		)
Net sales of short-term investments - non-fiduciary			329			(153		)			176
Acquisition of businesses, net of cash acquired	-		(10		)	(92		)	-		(102		)
Proceeds from sale of businesses	-		5			4			-		9
Capital expenditures	-		-			(151		)	-		(151		)
CASH PROVIDED BY (USED FOR) INVESTING ACTIVITIES	-		359			(352		)	-		7
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	-		(828		)	-			-		(828		)
Advances from (to) affiliates	-		487			(487		)	-		-
Issuance of shares for employee benefit plans	-		165			-			-		165
Issuance of debt	-		1,190			382			-		1,572
Repayment of debt	-		(1,126		)	(397		)	-		(1,523		)
Cash dividends to shareholders	-		(150		)	-			-		(150		)
Purchase of shares from noncontrolling interests	-		-			(24		)	-		(24		)
Dividends paid to noncontrolling interests	-		-			(21		)	-		(21		)
CASH USED FOR FINANCING ACTIVITIES	-		(262		)	(547		)	-		(809		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	-		-			(36		)	-		(36		)
NET DECREASE IN CASH AND CASH EQUIVALENTS	-		(40		)	(11		)	-		(51		)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	-		14			332			-		346
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	-	$	(26	)	$	321		$	-	$	295

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Share-Based Compensation Plans (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation expense	$ 55	$ 59	$ 160	$ 179
Employee share purchase plans
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation expense	2	2	6	5
Restricted share units ("RSUs")
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation expense	37	31	120	108
Non-vested share awards
Non-vested at beginning of period (in shares)			9,916,000	10,674,000	10,674,000
Granted (in shares)			4,888,000	3,366,000
Vested (in shares)			(3,343,000)	(3,385,000)
Forfeited (in shares)			(516,000)	(410,000)
Non-vested at end of period (in shares)	10,945,000	10,245,000	10,945,000	10,245,000
Weighted Average Fair value
Non-vested at beginning of period (in dollars per share)			$ 42	$ 38	$ 38
Granted (in dollars per share)			$ 46	$ 51
Vested (in dollars per share)			$ 42	$ 39
Forfeited (in dollars per share)			$ 44	$ 39
Non-vested at end of period (in dollars per share)	$ 44	$ 42	$ 44	$ 42
Performance-based Awards
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation expense	15	24	30	59
Non-vested share awards
Granted (in shares)			1,369,000		1,715,000	1,390,000
Weighted Average Fair value
Granted (in dollars per share)			$ 47		$ 50	$ 39
Number of shares that would be issued based on current performance levels			1,367,000		1,131,000	1,241,000
Unamortized expense, based on current	52		52		25	4
Share options
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation expense	$ 1	$ 2	$ 4	$ 7
Weighted Average Fair value
Shares granted				80,000
Shares granted (in dollars per share)				$ 53
Share options | Incentive compensation plans
Weighted Average Fair value
Shares granted				80,000
Shares granted (in dollars per share)				$ 53

XML

Commitments and Contingencies (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012 item	Dec. 31, 2011
Commitments and Contingencies
Letters of credit outstanding	$ 69	$ 75
Number of US pension plans that are a LOC beneficiary	1

XML

Investments (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Interest-bearing Assets
Cash and cash equivalents	$ 290	$ 272	$ 295	$ 346
Short-term investments	718	785
Fiduciary assets	4,147	4,190
Investments	160	239
Total interest-bearing assets	5,315	5,486
Investments:
Equity method investments	103	164
Other investments, at cost	39	60
Fixed-maturity securities	18	15
Investments	$ 160	$ 239

XML

Accounting Principles and Practices

9 Months Ended

Sep. 30, 2012

Accounting Principles and Practices

Accounting Principles and Practices

2. Accounting Principles and Practices

Changes in Accounting Principles

Indefinite-Lived Intangible Asset Impairment

In July2012, the Financial Accounting Standards Board ("FASB") issued guidance on the testing of indefinite-lived intangible assets for impairment that gives an entity the option to perform a qualitative assessment that may eliminate the requirement to perform the annual quantitative test. The recently issued guidance gives an entity the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a an indefinite-lived intangible asset is less than its carrying amount. If an entity concludes that this is the case, it must perform the quantitative test. The guidance is effective for Aon in the first quarter 2013. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

Goodwill Impairment

In September2011, the FASB issued final guidance on goodwill impairment that gives an entity the option to perform a qualitative assessment that may eliminate the requirement to perform the annual two-step test. The two-step test requires an entity to assess goodwill for impairment by quantitatively comparing the fair value of a reporting unit with its carrying amount, including goodwill (Step 1). If the reporting unit's fair value is less than its carrying amount, Step 2 of the test must be performed to measure the amount of goodwill impairment, if any. The guidance gives an entity the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If an entity concludes that this is the case, it must perform the two-step test. Otherwise, the two-step test is not required. The Company early adopted this guidance in the fourth quarter 2011. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements.

Comprehensive Income

In June2011, the FASB issued guidance that updates principles related to the presentation of comprehensive income. The revised guidance requires companies to present the components of net income and other comprehensive income either as one continuous statement or as two consecutive statements and eliminates the option to present components of other comprehensive income as part of the statement of changes in stockholders' equity. The guidance, which must be applied retroactively, was effective for Aon beginning in the first quarter of 2012. The adoption of this guidance affects only the presentation of these Condensed Consolidated Financial Statements, and had no effect on the financial condition, results of operations or cash flows of the Company.

Fair Value Measurement

In May2011, the FASB issued guidance that clarifies the application of existing fair value measurements and disclosures, and changes certain principles or requirements for fair value measurements and disclosures. The additional required disclosures include quantitative information, sensitivity discussion, and description of the valuation process, as well as increased disclosure of unobservable inputs that are significant to the fair value measurement and transfers between Level 1 and Level 2. The guidance is effective for Aon beginning in the first quarter 2012. The adoption of this guidance did not have a material impact on the Company's financial statements.

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Related Party Transactions (Details) (Significant shareholder, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Significant shareholder
Related party transactions
Commissions and fee revenue from transactions with related party	$ 3	$ 3	$ 11	$ 5

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Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Changes in the net carrying amount of goodwill by operating segment (in millions)
Balance at the beginning of the period	$ 8,770
Goodwill related to current year acquisitions	60
Goodwill related to other prior year acquisitions	(6)
Foreign currency translation	32
Balance at the end of the period	8,856
Risk Solutions
Changes in the net carrying amount of goodwill by operating segment (in millions)
Balance at the beginning of the period	5,557
Goodwill related to current year acquisitions	55
Goodwill related to other prior year acquisitions	(6)
Transfers related to Health and Benefits consulting	313
Foreign currency translation	18
Balance at the end of the period	5,937
HR Solutions
Changes in the net carrying amount of goodwill by operating segment (in millions)
Balance at the beginning of the period	3,213
Goodwill related to current year acquisitions	5
Transfers related to Health and Benefits consulting	(313)
Foreign currency translation	14
Balance at the end of the period	$ 2,919

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Restructuring (Tables)

9 Months Ended

Sep. 30, 2012

Restructuring and Related Cost

Schedule of changes in company's liabilities for its restructuring plans

(in millions)	AonHewitt Plan			AonBenfield Plan			2007Plan			Other			Total
Balance at December31, 2011	$	95		$	20		$	50		$	8		$	173
Expensed	56			8			-			-			64
Cash payments	(71		)	(20		)	(15		)	(3		)	(109		)
Foreign exchange translation and other	-			1			2			-			3
Balance at September30, 2012	$	80		$	9		$	37		$	5		$	131

Aon Hewitt Restructuring Plan

Restructuring and Related Cost

Schedule of restructuring and related expenses by type

(in millions)	2010		2011		ThirdQuarter 2012		NineMonths 2012		Total Inceptionto Date		Estimated TotalCostfor Restructuring Plan(1)
Workforce reduction	$	49	$	64	$	25	$	44	$	157	$	180
Lease consolidation	3		32		6		11		46		95
Asset impairments	-		7		-		1		8		47
Other costs associated with restructuring (2)	-		2		1		1		3		3
Total restructuring and related expenses	$	52	$	105	$	32	$	57	$	214	$	325

(1) Actual costs, when incurred, will vary due to changes in the assumptions built into this plan. Significant assumptions likely to change when plans are finalized and implemented include, but are not limited to, changes in severance calculations, changes in the assumptions underlying sublease loss calculations due to changing market conditions, and changes in the overall analysis that might cause the Company to add or cancel component initiatives.

(2) Other costs associated with restructuring initiatives, including moving costs and consulting and legal fees, are recognized when incurred.

Aon Hewitt Restructuring Plan | Total operating segments

Restructuring and Related Cost

Schedule of restructuring and related expenses by type

(in millions)	2010		2011		ThirdQuarter 2012		NineMonths 2012		Total Inceptionto Date		Estimated TotalCostfor Restructuring Plan
HR Solutions	$	52	$	49	$	16	$	36	$	137	$	243
Risk Solutions	-		56		16		21		77		82
Total restructuring and related expenses	$	52	$	105	$	32	$	57	$	214	$	325

Aon Benfield Restructuring Plan

Restructuring and Related Cost

Schedule of restructuring and related expenses by type

(in millions)	Purchase Price Allocation		2009		2010		2011			ThirdQuarter 2012		NineMonths 2012		Inceptionto Date		TotalCostfor Restructuring Plan
Workforce reduction	$	32	$	38	$	15	$	33		$	-	$	8	$	126	$	126
Lease consolidation	20		14		7		(15		)	-		-		26		26
Asset impairments	-		2		2		-			-		-		4		4
Other costs associated with restructuring	1		1		2		1			-		-		5		5
Total restructuring and related expenses	$	53	$	55	$	26	$	19		$	-	$	8	$	161	$	161

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Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2012

Goodwill and Other Intangible Assets

Schedule of changes in the net carrying amount of goodwill by operating segment

(in millions) .	Risk Solutions			HR Solutions			Total
Balance as of December31, 2011	$	5,557		$	3,213		$	8,770
Goodwill related to current year acquisitions	55			5			60
Goodwill related to other prior year acquisitions	(6		)	-			(6		)
Transfer related to Health and Benefits Consulting (1)	313			(313		)	-
Foreign currency translation	18			14			32
Balance as of September30, 2012	$	5,937		$	2,919		$	8,856

(1) Effective January1, 2012, the Health and Benefits Consulting business was transferred from the HR Solutions segment to the Risk Solutions segment.

Schedule of other intangible assets by asset class

	September30,2012						December31,2011
(in millions)	Gross Carrying Amount		Accumulated Amortization		NetCarrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Intangible assets with indefinite lives:
Trademarks	$	1,024	$	-	$	1,024	$	1,024	$	-	$	1,024
Intangible assets with finite lives:
Trademarks	6		2		4		4		1		3
Customer related and contract based	2,671		874		1,797		2,608		615		1,993
Marketing, technology and other	609		394		215		606		350		256
	$	4,310	$	1,270	$	3,040	$	4,242	$	966	$	3,276

Schedule of estimated future amortization expense on intangible assets

(in millions)	HRSolutions		RiskSolutions		Total
Remainder of 2012	$	76	$	32	$	108
2013	278		112		390
2014	240		96		336
2015	210		82		292
2016	175		70		245
Thereafter	478		167		645
	$	1,457	$	559	$	2,016

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Derivatives and Hedging (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Derivatives, Fair Value
Derivative Assets	$ 242	$ 157
Derivative Liabilities	284	189
Notional Amount	1,753	2,245
Derivatives accounted for as hedges:
Derivatives, Fair Value
Derivative Assets	240	156
Derivative Liabilities	283	188
Notional Amount	1,566	1,999
Interest rate contracts | Derivatives accounted for as hedges:
Derivatives, Fair Value
Derivative Assets	16	16
Notional Amount	342	702
Foreign exchange contracts | Derivatives accounted for as hedges:
Derivatives, Fair Value
Derivative Assets	224	140
Derivative Liabilities	283	188
Notional Amount	1,224	1,297
Foreign exchange contracts | Derivatives not accounted for as hedges:
Derivatives, Fair Value
Derivative Assets	2	1
Derivative Liabilities	1	1
Notional Amount	$ 187	$ 246

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Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Intangible assets with indefinite lives
Trademarks	$ 1,024		$ 1,024		$ 1,024
Intangible assets with finite lives
Intangible assets with finite lives, gross carrying amount	4,310		4,310		4,242
Intangible assets with finite lives, accumulated amortization	1,270		1,270		966
Intangible assets, net	3,040		3,040		3,276
Amortization expense on intangible assets	105	91	313	273
Estimated amortization for intangible assets
Remainder of 2012			108
2013			390
2014			336
2015			292
2016			245
Thereafter			645
Estimated future amortization for intangible assets			2,016
HR Solutions
Estimated amortization for intangible assets
Remainder of 2012			76
2013			278
2014			240
2015			210
2016			175
Thereafter			478
Estimated future amortization for intangible assets			1,457
Risk Solutions
Estimated amortization for intangible assets
Remainder of 2012			32
2013			112
2014			96
2015			82
2016			70
Thereafter			167
Estimated future amortization for intangible assets			559
Trademarks
Intangible assets with finite lives
Intangible assets with finite lives, gross carrying amount	6		6		4
Intangible assets with finite lives, accumulated amortization	2		2		1
Intangible assets, net	4		4		3
Customer related and contract based
Intangible assets with finite lives
Intangible assets with finite lives, gross carrying amount	2,671		2,671		2,608
Intangible assets with finite lives, accumulated amortization	874		874		615
Intangible assets, net	1,797		1,797		1,993
Marketing, technology and other
Intangible assets with finite lives
Intangible assets with finite lives, gross carrying amount	609		609		606
Intangible assets with finite lives, accumulated amortization	394		394		350
Intangible assets, net	$ 215		$ 215		$ 256

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Investments (Tables)

9 Months Ended

Sep. 30, 2012

Investments

Schedule of interest bearing assets

	September30,		December31,
(in millions)	2012		2011
Cash and cash equivalents	$	290	$	272
Short-term investments	718		785
Fiduciary assets (1)	4,147		4,190
Investments	160		239
	$	5,315	$	5,486

(1) Fiduciary assets include funds held on behalf of clients but does not include fiduciary receivables.

Schedule of investments

	September30,		December31,
(in millions)	2012		2011
Equity method investments (2)	$	103	$	164
Other investments, at cost	39		60
Fixed-maturity securities	18		15
	$	160	$	239

(2) The reduction in equity method investments is primarily due to redemptions.

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Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2012

Shareholders' Equity

Schedule of shares of participating securities in earnings

	Threemonthsended September30,				Ninemonthsended September30,
(in millions)	2012		2011		2012		2011
Income from continuing operations	$	2	$	3	$	8	$	11
Income from discontinued operations	-		-		-		-
Net income	$	2	$	3	$	8	$	11

Schedule of components of weighted average number of shares

	Threemonthsended September30,		Ninemonthsended September30,
(in millions)	2012	2011	2012	2011
Shares for basic earnings per share (1)	327.3	332.6	330.6	336.7
Common stock equivalents	3.7	4.3	3.8	5.1
Shares for diluted earnings per share	331.0	336.9	334.4	341.8

(1) Includes 4.5 million and 5.2 million of participating securities for the three months ended September30, 2012 and 2011, respectively, and 4.7 million and 5.5 million of participating securities for the nine months ended September30, 2012 and 2011, respectively.

Components of Accumulated other comprehensive loss, net of related tax

(in millions)	September30, 2012			December31, 2011
Net derivative losses	$	(32	)	$	(37	)
Net foreign exchange translation adjustments	193			124
Net postretirement benefit obligations	(2,411		)	(2,457		)
Accumulated other comprehensive loss, net of tax	$	(2,250	)	$	(2,370	)

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Basis of Presentation

9 Months Ended

Sep. 30, 2012

Basis of Presentation

Basis of Presentation

1. Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements and Notes thereto have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP"). The Condensed Consolidated Financial Statements include the accounts of Aon plc and all controlled subsidiaries ("Aon" or the "Company"). All material intercompany accounts and transactions have been eliminated. The Condensed Consolidated Financial Statements include, in the opinion of management, all adjustments (consisting of normal recurring adjustments and reclassifications) necessary to present fairly the Company's consolidated financial position, results of operations and cash flows for all periods presented.

Certain information and footnote disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. These Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in the Company's Annual Report on Form10-K for the year ended December31, 2011. The results for the three and nine months ended September30, 2012 are not necessarily indicative of operating results that may be expected for the full year ending December31, 2012.

Company Redomestication

On April2, 2012, the Company completed the reorganization of the corporate structure of the group of companies controlled by its predecessor, Aon Corporation, as holding company of the Aon group, pursuant to which Aon Corporation merged with one of its indirect, wholly-owned subsidiaries and Aon plc became the publicly-held parent company of the Aon group. This transaction is referred to as the Redomestication. In the Redomestication, each issued and outstanding share of Aon Corporation common stock held by stockholders of Aon Corporation was converted into the right to receive one ClassA Ordinary Share, nominal value $0.01 per share, of Aon plc. Likewise, equity incentive and compensation plans were assumed by Aon plc and amended to provide that those plans will now provide for the award and issuance of ClassA Ordinary Shares instead of shares of common stock of Aon Corporation on a one-for-one basis. Shares of treasury stock of Aon Corporation were cancelled in the Redomestication. Any references to "Aon", "the Company", "us", or "we," or any similar references relating to periods before the Redomestication shall be construed as references to Aon Corporation, being the previous parent company of the Aon group.

Reclassification

Certain amounts in prior year's Condensed Consolidated Financial Statements and related notes have been reclassified to conform to the 2012 presentation. In prior periods, remeasurement gains and losses from foreign currency transactions and related derivative instruments were recognized in Other general expenses in the Condensed Consolidated Statements of Income. These gains and losses are now included in Other (expense) income in the Condensed Consolidated Statements of Income and disclosed in Note 4 to these Condensed Consolidated Financial Statements. The Company believes this provides greater clarity into the income generated from operations.

Use of Estimates

The preparation of the accompanying unaudited Condensed Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of reserves and expenses. These estimates and assumptions are based on management's best estimates and judgments. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Aon adjusts such estimates and assumptions when facts and circumstances dictate. Illiquid credit markets, volatile equity markets, and foreign currency movements have combined to increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods.

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Employee Benefits (Tables) (Pension Plans, Defined Benefit)

9 Months Ended

Sep. 30, 2012

Pension Plans, Defined Benefit

Defined Benefit Plan Disclosure

Components of net periodic benefit cost for the pension plans

	ThreemonthsendedSeptember30,
	U.S.						International
(in millions)	2012			2011			2012			2011
Service cost	$	-		$	-		$	4		$	5
Interest cost	29			31			66			67
Expected return on plan assets	(31		)	(30		)	(80		)	(73		)
Amortization of net actuarial loss	10			8			15			14
Net periodic benefit cost	$	8		$	9		$	5		$	13

	NinemonthsendedSeptember30,
	U.S.						International
	2012			2011			2012			2011
Service cost	$	-		$	-		$	12		$	15
Interest cost	89			92			198			201
Expected return on plan assets	(95		)	(90		)	(241		)	(217		)
Amortization of net actuarial loss	32			23			44			41
Net periodic benefit cost	$	26		$	25		$	13		$	40

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Other (Expense) Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Other (Expense) Income
Equity earnings		$ 5	$ 8	$ 9
Realized gain on sale of investments	9	1	11	10
Foreign currency remeasurement (losses) gains	(24)	24	(24)	18
Hedging gains (losses)	8	(11)	8	(13)
Loss on extinguishment of debt				(19)
Other	(2)	1		1
Other (Expense) Income	$ (9)	$ 20	$ 3	$ 6

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Share-Based Compensation Plans (Details 2) (Share options, USD $)	9 Months Ended
	Sep. 30, 2012 Y	Sep. 30, 2011 Y
Weighted Average assumptions, weighted average expected life and estimated fair value of options
Weighted average volatility (as a percent)		26.10%
Expected dividend yield (as a percent)		1.30%
Risk-free rate (as a percent)		2.20%
Weighted average expected life (in years)		5.5
Weighted average estimated fair value per share		$ 10.92
Share Options
Outstanding at beginning of period (in shares)	9,116,000	13,919,000
Granted (in shares)		80,000
Exercised (in shares)	(2,570,000)	(3,781,000)
Forfeited and expired (in shares)	(67,000)	(300,000)
Outstanding at end of period (in shares)	6,479,000	9,918,000
Exercisable at end of period (in shares)	5,969,000	8,566,000
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 32	$ 32
Granted (in dollars per share)		$ 53
Exercised (in dollars per share)	$ 31	$ 32
Forfeited and expired (in dollars per share)	$ 37	$ 37
Outstanding at end of period (in dollars per share)	$ 32	$ 32
Exercisable at end of period (in dollars per share)	$ 31	$ 30
Weighted average remaining contractual life of share options outstanding (in years)	2.8	3.3
Incentive compensation plans
Share Options
Granted (in shares)		80,000
Weighted-Average Exercise Price
Granted (in dollars per share)		$ 53

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Condensed Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue
Commissions, fees and other	$ 2,726	$ 2,708	$ 8,368	$ 8,255
Fiduciary investment income	11	15	31	38
Total revenue	2,737	2,723	8,399	8,293
Expenses
Compensation and benefits	1,620	1,634	4,920	4,843
Other general expenses	778	761	2,344	2,284
Total operating expenses	2,398	2,395	7,264	7,127
Operating income	339	328	1,135	1,166
Interest income	1	4	6	14
Interest expense	(57)	(60)	(173)	(186)
Other (expense) income	(9)	20	3	6
Income from continuing operations before income taxes	274	292	971	1,000
Income taxes	64	84	257	274
Income from continuing operations	210	208	714	726
(Loss) income from discontinued operations before income taxes			(1)	5
Income taxes				1
(Loss) income from discontinued operations			(1)	4
Net income	210	208	713	730
Less: Net income attributable to noncontrolling interests	6	10	25	28
Net income attributable to Aon shareholders	204	198	688	702
Net income (loss) attributable to Aon shareholders
Income from continuing operations	204	198	689	698
(Loss) income from discontinued operations			(1)	4
Net income	$ 204	$ 198	$ 688	$ 702
Basic net income per share attributable to Aon shareholders
Continuing operations (in dollars per share)	$ 0.62	$ 0.59	$ 2.08	$ 2.07
Discontinued operations (in dollars per share)				$ 0.01
Net income (in dollars per share)	$ 0.62	$ 0.59	$ 2.08	$ 2.08
Diluted net income per share attributable to Aon shareholders
Continuing operations (in dollars per share)	$ 0.62	$ 0.59	$ 2.06	$ 2.04
Discontinued operations (in dollars per share)				$ 0.01
Net income (in dollars per share)	$ 0.62	$ 0.59	$ 2.06	$ 2.05
Cash dividends per share paid on ordinary shares (in dollars per share)	$ 0.16	$ 0.15	$ 0.46	$ 0.45
Weighted average ordinary shares outstanding - basic (in shares)	327.3	332.6	330.6	336.7
Weighted average ordinary shares outstanding - diluted (in shares)	331.0	336.9	334.4	341.8

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Restructuring (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended			9 Months Ended	12 Months Ended				9 Months Ended	12 Months Ended			9 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2012 Aon Hewitt Restructuring Plan	Sep. 30, 2011 Aon Hewitt Restructuring Plan	Sep. 30, 2012 Aon Hewitt Restructuring Plan	Sep. 30, 2011 Aon Hewitt Restructuring Plan	Dec. 31, 2011 Aon Hewitt Restructuring Plan	Dec. 31, 2010 Aon Hewitt Restructuring Plan	Sep. 30, 2012 Aon Hewitt Restructuring Plan HR Solutions	Sep. 30, 2012 Aon Hewitt Restructuring Plan HR Solutions	Dec. 31, 2011 Aon Hewitt Restructuring Plan HR Solutions	Dec. 31, 2010 Aon Hewitt Restructuring Plan HR Solutions	Sep. 30, 2011 Aon Hewitt Restructuring Plan Consulting services	Dec. 31, 2011 Aon Hewitt Restructuring Plan Consulting services	Sep. 30, 2012 Aon Hewitt Restructuring Plan Risk Solutions	Sep. 30, 2012 Aon Hewitt Restructuring Plan Risk Solutions	Dec. 31, 2011 Aon Hewitt Restructuring Plan Risk Solutions	Oct. 31, 2010 Aon Hewitt Restructuring Plan Workforce reduction item	Sep. 30, 2012 Aon Hewitt Restructuring Plan Workforce reduction	Sep. 30, 2012 Aon Hewitt Restructuring Plan Workforce reduction	Dec. 31, 2011 Aon Hewitt Restructuring Plan Workforce reduction	Dec. 31, 2010 Aon Hewitt Restructuring Plan Workforce reduction	Sep. 30, 2012 Aon Hewitt Restructuring Plan Workforce reduction Minimum item	Sep. 30, 2012 Aon Hewitt Restructuring Plan Real estate lease rationalization	Sep. 30, 2012 Aon Hewitt Restructuring Plan Lease consolidation	Sep. 30, 2012 Aon Hewitt Restructuring Plan Lease consolidation	Dec. 31, 2011 Aon Hewitt Restructuring Plan Lease consolidation	Dec. 31, 2010 Aon Hewitt Restructuring Plan Lease consolidation	Sep. 30, 2012 Aon Hewitt Restructuring Plan Asset impairments	Dec. 31, 2011 Aon Hewitt Restructuring Plan Asset impairments	Sep. 30, 2012 Aon Hewitt Restructuring Plan Other costs associated with restructuring	Sep. 30, 2012 Aon Hewitt Restructuring Plan Other costs associated with restructuring	Dec. 31, 2011 Aon Hewitt Restructuring Plan Other costs associated with restructuring	Sep. 30, 2011 Aon Benfield Restructuring Plan	Sep. 30, 2012 Aon Benfield Restructuring Plan	Sep. 30, 2011 Aon Benfield Restructuring Plan	Dec. 31, 2011 Aon Benfield Restructuring Plan	Dec. 31, 2010 Aon Benfield Restructuring Plan	Dec. 31, 2009 Aon Benfield Restructuring Plan	Sep. 30, 2012 Aon Benfield Restructuring Plan Workforce reduction	Dec. 31, 2011 Aon Benfield Restructuring Plan Workforce reduction	Dec. 31, 2010 Aon Benfield Restructuring Plan Workforce reduction	Dec. 31, 2009 Aon Benfield Restructuring Plan Workforce reduction	Dec. 31, 2008 Aon Benfield Restructuring Plan Workforce reduction item	Sep. 30, 2012 Aon Benfield Restructuring Plan Lease consolidation	Dec. 31, 2011 Aon Benfield Restructuring Plan Lease consolidation	Dec. 31, 2010 Aon Benfield Restructuring Plan Lease consolidation	Dec. 31, 2009 Aon Benfield Restructuring Plan Lease consolidation	Sep. 30, 2012 Aon Benfield Restructuring Plan Asset impairments	Dec. 31, 2010 Aon Benfield Restructuring Plan Asset impairments	Dec. 31, 2009 Aon Benfield Restructuring Plan Asset impairments	Sep. 30, 2012 Aon Benfield Restructuring Plan Other costs associated with restructuring	Dec. 31, 2011 Aon Benfield Restructuring Plan Other costs associated with restructuring	Dec. 31, 2010 Aon Benfield Restructuring Plan Other costs associated with restructuring	Dec. 31, 2009 Aon Benfield Restructuring Plan Other costs associated with restructuring
Restructuring and Related Cost
Number of jobs expected to be eliminated under the plan																2,000																										810
Estimated Total Cost for Restructuring Period			$ 325					$ 243						$ 82				$ 180				$ 145		$ 95			$ 47			$ 3			$ 161					$ 126					$ 26				$ 4			$ 5
Number of jobs eliminated to date under the plan																					1,800
Restructuring and related charges	32	26	57	80	105	52	16	36	49	52	14	41	16	21	56		25	44	64	49			6	11	32	3	1	7	1	1	2	3	8		19	26	55	8	33	15	38			(15)	7	14		2	2	1	1	2	1
Restructuring charges Total Inception to Date			214					137						77				157						46			8			3			161					126					26				4			5
Restructuring benefits																																		2
Purchase price allocation																																	$ 53					$ 32					$ 20							$ 1

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Consolidated Statement of Shareholders' Equity (USD $) In Millions, unless otherwise specified	Total	Ordinary Shares and Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss, Net of Tax	Non-controlling Interests
Balance at Dec. 31, 2011	$ 8,120	$ 4,407	$ 8,594	$ (2,553)	$ (2,370)	$ 42
Balance (in shares) at Dec. 31, 2011	386.4	386.4
Increase (Decrease) in Shareholders' Equity
Net income	713		688			25
Retirement of treasury shares		(60)	(2,412)	2,472
Retirement of treasury shares (in shares)		(60.0)
Shares issued - employee benefit plans	20	20
Shares issued - employee benefit plans (in shares)		3.0
Shares purchased	(625)		(525)	(100)
Shares purchased (in shares)		(10.7)
Shares reissued - employee benefit plans	(13)	(181)	(13)	181
Tax benefit - employee benefit plans	30	30
Share-based compensation expense	160	160
Dividends to shareholders	(153)		(153)
Change in net derivative gains/losses	5				5
Net foreign currency translation adjustments	71				69	2
Net post-retirement benefit obligation	46				46
Purchase of subsidiary shares from non-controlling interests	4					4
Dividends paid to non-controlling interests on subsidiary common stock	(17)					(17)
Balance at Sep. 30, 2012	$ 8,361	$ 4,376	$ 6,179		$ (2,250)	$ 56
Balance (in shares) at Sep. 30, 2012	318.7	318.7

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Fair Value and Financial Instruments (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair value of financial instrument
Carrying value of total debt	$ 4,111	$ 4,155
Fair value of total debt	$ 4,618	$ 4,494

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Fair Value and Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value and Financial Instruments

Schedule of assets and liabilities that are measured at fair value on a recurring basis

			FairValueMeasurementsUsing
			QuotedPricesin		Significant		Significant
			ActiveMarkets		Other		Unobservable
	Balanceat		forIdentical		Observable		Inputs
(in millions)	September30,2012		Assets(Level1)		Inputs(Level2)		(Level3)
Assets:
Money market funds and highly liquid debt securities (1)	$	2,612	$	2,587	$	25	$	-
Other investments
Fixed maturity securities
Corporate bonds	12		-		-		12
Government bonds	6		-		6		-
Derivatives
Interest rate contracts	16		-		16		-
Foreign exchange contracts	226		-		226		-
Liabilities:
Derivatives
Foreign exchange contracts	284		-		284		-

(1) Includes $2,587 million of money market funds and $25 million of highly liquid debt securities that are classified as Fiduciary assets, Short-term investments or Cash and cash equivalents in the Condensed Consolidated Statements of Financial Position, depending on their nature and initial maturity. See Note 8 "Investments" for additional information regarding the Company's investments.

			FairValueMeasurementsUsing
			QuotedPricesin		Significant		Significant
			ActiveMarkets		Other		Unobservable
	Balanceat		forIdentical		Observable		Inputs
	December31,2011		Assets(Level1)		Inputs(Level2)		(Level3)
Assets:
Money market funds and highly liquid debt securities(1)	$	2,428	$	2,403	$	25	$	-
Other investments
Fixed maturity securities
Corporate bonds	12		-		-		12
Government Bonds	3		-		3		-
Derivatives
Interest rate contracts	16		-		16		-
Foreign exchange contracts	141		-		141		-
Liabilities:
Derivatives
Foreign exchange contracts	189		-		189		-

(1) Includes $2,403 million of money market funds and $25 million of highly liquid debt securities that are classified as Fiduciary assets, Short-term investments or Cash and cash equivalents in the Condensed Consolidated Statements of Financial Position, depending on their nature and initial maturity. See Note 8 "Investments" for additional information regarding the Company's investments.

Schedule of financial instruments where the carrying amounts and fair values differ

	September30,2012				December31,2011
	Carrying		Fair		Carrying		Fair
(in millions)	Value		Value		Value		Value
Long-term debt	$	4,111	$	4,618	$	4,155	$	4,494

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Guarantee of Registered Securities (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS :
Cash and cash equivalents	$ 290	$ 272	$ 295	$ 346
Short-term investments	718	785
Receivables, net	2,959	3,183
Fiduciary assets	11,343	10,838
Other current assets	392	427
Total Current Assets	15,702	15,505
Goodwill	8,856	8,770
Intangible assets, net	3,040	3,276
Fixed assets, net	814	783
Investments	160	239
Other non-current assets	937	979
TOTAL ASSETS	29,509	29,552
CURRENT LIABILITIES
Fiduciary liabilities	11,343	10,838
Short-term debt and current portion of long-term debt	291	337
Accounts payable and accrued liabilities	1,519	1,832
Other current liabilities	801	753
Total Current Liabilities	13,954	13,760
Long-term debt	4,111	4,155
Pension, other post retirement and other post employment liabilities	1,757	2,192
Other non-current liabilities	1,326	1,325
TOTAL LIABILITIES	21,148	21,432
TOTAL AON SHAREHOLDERS' EQUITY	8,305	8,078
Noncontrolling interests	56	42
TOTAL EQUITY	8,361	8,120
TOTAL LIABILITIES AND EQUITY	29,509	29,552
Parent Guarantor
CURRENT ASSETS :
Cash and cash equivalents	1
Short-term investments	16
Intercompany receivables		3
Total Current Assets	17	3
Other non-current assets	222
Investments in subsidiary	10,797	10,183
TOTAL ASSETS	11,036	10,186
CURRENT LIABILITIES
Accounts payable and accrued liabilities	4
Intercompany payables	34
Total Current Liabilities	38
Intercompany payables	2,690	2,108
Other non-current liabilities	3
TOTAL LIABILITIES	2,731	2,108
TOTAL AON SHAREHOLDERS' EQUITY	8,305	8,078
TOTAL EQUITY	8,305	8,078
TOTAL LIABILITIES AND EQUITY	11,036	10,186
Subsidiary Issuer
CURRENT ASSETS :
Cash and cash equivalents	58	(21)	(26)	14
Short-term investments	261	321
Receivables, net	2	2
Intercompany receivables	1,677	610
Other current assets	41	57
Total Current Assets	2,039	969
Investments	41	39
Intercompany receivables	2,240	2,133
Other non-current assets	659	900
Investments in subsidiary	10,349	9,269
TOTAL ASSETS	15,328	13,310
CURRENT LIABILITIES
Short-term debt and current portion of long-term debt	268	318
Accounts payable and accrued liabilities	86	78
Intercompany payables	1,779	206
Other current liabilities	47	5
Total Current Liabilities	2,180	607
Long-term debt	3,030	3,063
Pension, other post retirement and other post employment liabilities	1,167	1,407
Intercompany payables	359	378
Other non-current liabilities	146	141
TOTAL LIABILITIES	6,882	5,596
TOTAL AON SHAREHOLDERS' EQUITY	8,446	7,714
TOTAL EQUITY	8,446	7,714
TOTAL LIABILITIES AND EQUITY	15,328	13,310
Other non-guarantor subsidiaries
CURRENT ASSETS :
Cash and cash equivalents	231	293	321	332
Short-term investments	441	464
Receivables, net	2,957	3,181
Fiduciary assets	11,343	10,838
Intercompany receivables	2,868	539
Other current assets	351	378
Total Current Assets	18,191	15,693
Goodwill	8,856	8,770
Intangible assets, net	3,040	3,276
Fixed assets, net	814	783
Investments	119	200
Intercompany receivables	2,171	2,202
Other non-current assets	56	781
Investments in subsidiary	8,446	7,714
TOTAL ASSETS	41,693	39,419
CURRENT LIABILITIES
Fiduciary liabilities	11,343	10,838
Short-term debt and current portion of long-term debt	23	19
Accounts payable and accrued liabilities	1,429	1,758
Intercompany payables	1,782	609
Other current liabilities	754	752
Total Current Liabilities	15,331	13,976
Long-term debt	1,081	1,092
Pension, other post retirement and other post employment liabilities	590	785
Intercompany payables	2,311	2,186
Other non-current liabilities	1,177	1,886
TOTAL LIABILITIES	20,490	19,925
TOTAL AON SHAREHOLDERS' EQUITY	21,146	19,452
Noncontrolling interests	56	42
TOTAL EQUITY	21,202	19,494
TOTAL LIABILITIES AND EQUITY	41,692	39,419
Consolidating adjustments
CURRENT ASSETS :
Intercompany receivables	(4,545)	(1,152)
Other current assets		(8)
Total Current Assets	(4,545)	(1,160)
Intercompany receivables	(4,411)	(4,335)
Other non-current assets		(702)
Investments in subsidiary	(29,592)	(27,166)
TOTAL ASSETS	(38,548)	(33,363)
CURRENT LIABILITIES
Accounts payable and accrued liabilities		(4)
Intercompany payables	(3,595)	(815)
Other current liabilities		(4)
Total Current Liabilities	(3,595)	(823)
Intercompany payables	(5,360)	(4,672)
Other non-current liabilities		(702)
TOTAL LIABILITIES	(8,955)	(6,197)
TOTAL AON SHAREHOLDERS' EQUITY	(29,592)	(27,166)
TOTAL EQUITY	(29,592)	(27,166)
TOTAL LIABILITIES AND EQUITY	$ (38,547)	$ (33,363)

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2012

Commitments and Contingencies

Commitments and Contingencies

15. Commitments and Contingencies

Legal

Aon and its subsidiaries are subject to numerous claims, tax assessments, lawsuits and proceedings that arise in the ordinary course of business, which frequently include errors and omissions ("E&O") claims. The damages claimed in these matters are or may be substantial, including, in many instances, claims for punitive, treble or extraordinary damages. Aon has historically purchased E&O insurance and other insurance to provide protection against certain losses that arise in such matters. Aon has exhausted or materially depleted its coverage under some of the policies that protect the Company and, consequently, is self-insured or materially self-insured for some historical claims. Accruals for these exposures, and related insurance receivables, when applicable, have been provided to the extent that losses are deemed probable and are reasonably estimable. These amounts are adjusted from time to time as developments warrant. Amounts related to settlement provisions are recorded in Other general expenses in the Condensed Consolidated Statements of Income.

At the time of the 2004-05 investigation of the insurance industry by the Attorney General of New York and other regulators, purported classes of clients filed civil litigation against Aon and other companies under a variety of legal theories, including state tort, contract, fiduciary duty, antitrust and statutory theories and federal antitrust and Racketeer Influenced and Corrupt Organizations Act ("RICO") theories. The federal actions were consolidated in the U.S. District Court for the District of New Jersey, and a state court collective action was filed in California. In the New Jersey actions, the Court dismissed plaintiffs' federal antitrust and RICO claims in separate orders in Augustand October2007, respectively. In August2010, the U.S. Court of Appeals for the Third Circuit affirmed the dismissals of most, but not all, of the claims. In March2011, Aon entered into a Memorandum of Understanding documenting a settlement of the civil cases consolidated in the U.S. District Court for the District of New Jersey. Under that agreement, Aon will pay $550,000 in exchange for dismissal of the class claims. This agreement received final approval in the trial court in March2012. In April2012, certain entities that had objected to the settlement filed notices of appeal from the trial court judgment. Several non-class claims brought by individual plaintiffs who opted out of the class action proceeding will remain pending, but the Company does not believe these present material exposure to the Company individually or in the aggregate. The outcome of these lawsuits, and the amount of any losses or other payments that may result, cannot be estimated at this time.

A retail insurance brokerage subsidiary of Aon provides insurance brokerage services to Northrop Grumman Corporation ("Northrop"). This Aon subsidiary placed Northrop's excess property insurance program for the period covering 2005. Northrop suffered a substantial loss in August2005 when Hurricane Katrina damaged Northrop's facilities in the Gulf states. Northrop's excess insurance carrier, Factory Mutual Insurance Company ("Factory Mutual"), denied coverage for the claim pursuant to a flood exclusion. Northrop sued Factory Mutual in the United States District Court for the Central District of California and later sought to add this Aon subsidiary as a defendant, asserting that if Northrop's policy with Factory Mutual does not cover the losses suffered by Northrop stemming from Hurricane Katrina, then this Aon subsidiary will be responsible for Northrop's losses. On August26, 2010, the court granted in large part Factory Mutual's motion for partial summary judgment regarding the applicability of the flood exclusion and denied Northrop's motion to add this Aon subsidiary as a defendant in the federal lawsuit. On January27, 2011, Northrop filed suit against this Aon subsidiary in state court in Los Angeles, California, pleading claims for negligence, breach of contract and negligent misrepresentation. Aon believes that it has meritorious defenses and intends to vigorously defend itself against these claims. The outcome of this lawsuit, and the amount of any losses or other payments that may result, cannot be estimated at this time.

Another retail insurance brokerage subsidiary of Aon has been sued in Tennessee state court by a client, Opry Mills Mall Limited Partnership ("Opry Mills") that sustained flood damage to its property in May2010. The lawsuit seeks $200 million from numerous insurers with whom this Aon subsidiary placed the client's property insurance coverage. The insurers contend that only $50 million in coverage is available for the loss because the flood event occurred on property in a high hazard flood zone. Opry Mills is seeking full coverage from the insurers for the loss and has sued this Aon subsidiary in the alternative for the same $150 million difference on various theories of professional liability if the court determines there is not full coverage. Aon believes it has meritorious defenses and intends to vigorously defend itself against these claims. The outcome of this lawsuit, and the amount of any losses or other payments that may result, cannot be estimated at this time.

A pensions consulting and administration subsidiary of Hewitt prior to its acquisition by Aon provided advisory services to the Trustees of the Philips UK pension fund and the relevant employer of fund beneficiaries (together, "Philips"). In December2011, the Aon subsidiary received notice of a potential claim alleging negligence and breach of duty. The notice asserts Philips' right to claim damages related to Philips' use of a credit default swap hedging strategy pursuant to the supply of the advisory services, which is said to have resulted in substantial damages to Philips. No lawsuit has yet been filed. Aon believes that it has meritorious defenses and intends to vigorously defend itself against these allegations. The outcome of this circumstance, and the amount of any losses or other payments that may result, cannot be estimated at this time.

From time to time, Aon's clients may bring claims and take legal action pertaining to the performance of fiduciary responsibilities. Whether client claims and legal action related to the Company's performance of fiduciary responsibilities are founded or unfounded, if such claims and legal actions are resolved in a manner unfavorable to the Company, they may adversely affect Aon's financial results and materially impair the market perception of the Company and that of its products and services.

Although the ultimate outcome of all matters referred to above cannot be ascertained, and liabilities in indeterminate amounts may be imposed on Aon or its subsidiaries, on the basis of present information, amounts already provided, availability of insurance coverages and legal advice received, it is the opinion of management that the disposition or ultimate determination of such claims will not have a material adverse effect on the consolidated financial position of Aon. However, it is possible that future results of operations or cash flows for any particular quarterly or annual period could be materially affected by an unfavorable resolution of these matters.

Guarantees and Indemnifications

In connection with the Redomestication, the Company on April2, 2012 entered various agreements pursuant to which it agreed to guarantee the obligations of its subsidiaries arising under issued and outstanding debt securities. Those agreements included the (1)Amended and Restated Indenture, dated as of April2, 2012, among Aon Corporation, Aon plc, and The Bank of New York Mellon Trust Company, N.A., as trustee (the "Trustee") (amending and restating the Indenture, dated as of September10, 2010, between Aon Corporation and the Trustee), (2)Amended and Restated Indenture, dated as of April2, 2012, among Aon Corporation, Aon plc and the Trustee (amending and restating the Indenture, dated as of December16, 2002, between Aon Corporation and the Trustee), (3)Amended and Restated Indenture, dated as of April2, 2012, among Aon Corporation, Aon plc and the Trustee (amending and restating the Indenture, dated as of January13, 1997, as supplemented by the First Supplemental Indenture, dated as of January13, 1997) (4)First Supplemental Indenture, dated as of April2, 2012, among Aon Finance N.S. 1, ULC, as issuer, Aon Corporation, as guarantor, Aon plc, as guarantor, and Computershare Trust Company of Canada, as trustee, and (5)Amended and Restated Trust Deed, among Aon Corporation, Aon plc, Aon Services Luxembourg& Co S.C.A. (formerly known as Aon Financial Services Luxembourg S.A.) ("Aon Luxembourg") and BNY Mellon Corporate Trustee Services Limited, as trustee (the "Luxembourg Trustee") (amending and restating the Trust Deed, dated as of July1, 2009, as amended and restated on January12, 2011, among Aon Delaware, Aon Luxembourg and the Luxembourg Trustee).

Effective as of the same date, the Company also entered into agreements pursuant to which it agreed to guarantee the obligations of its subsidiaries arising under the (1)$450,000,000 Term Credit Agreement dated June15, 2011, among Aon Corporation, as borrower, Bank of America, N.A., as administrative agent and the other agents and lenders party thereto, (2)$400,000,000 Five-Year Agreement dated March20, 2012, among Aon Corporation, as borrower, Citibank, N.A., as administrative agent and the other agents and lenders party thereto and (3)€650,00,000 Facility Agreement, dated October15, 2010, among Aon Corporation, the subsidiaries of Aon Corporation party thereto as borrowers, Citibank International plc, as agent, and the other agents and lenders party thereto, as amended on July18, 2011.

Aon provides a variety of guarantees and indemnifications to its customers and others. The maximum potential amount of future payments represents the notional amounts that could become payable under the guarantees and indemnifications if there were a total default by the guaranteed parties, without consideration of possible recoveries under recourse provisions or other methods. These amounts may bear no relationship to the expected future payments, if any, for these guarantees and indemnifications. Any anticipated amounts payable that are deemed to be probable and reasonably estimable are included in the Company's Condensed Consolidated Financial Statements.

Aon had total letters of credit ("LOCs") outstanding for approximately $69 million at September30, 2012, as compared to $75 million at December31, 2011. These letters of credit cover the beneficiaries related to Aon's Canadian pension plan scheme and secure deductible retentions for Aon's own workers compensation program and one of the U.S. pension plans. Aon also has issued letters of credit to cover contingent payments for taxes and other business obligations to third parties, and other guarantees for miscellaneous purposes at its international subsidiaries. Amounts are accrued in the Condensed Consolidated Financial Statements to the extent the guarantees are probable and estimable.

Aon has certain contractual contingent guarantees for premium payments owed by clients to certain insurance companies. Costs associated with these guarantees, to the extent estimable and probable, are provided in Aon's allowance for doubtful accounts. The maximum exposure with respect to such contractual contingent guarantees was approximately $36 million at September30, 2012.

Aon has provided commitments to fund certain limited partnerships in which it has an interest in the event that the general partners request funding. Some of these commitments have specific expiration dates and the maximum potential funding under these commitments was $55 million at September30, 2012. During the three and nine months ended September30, 2012, the Company funded $4 million and $8 million, respectively, of these commitments.

Aon expects that, as prudent business interests dictate, additional guarantees and indemnifications may be issued from time to time.

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2012

Segment Information

Schedule of total revenue by business segments

	ThreemonthsendedSeptember30,						NinemonthsendedSeptember30,
(in millions)	2012			2011			2012			2011
Risk Solutions	$	1,778		$	1,772		$	5,582		$	5,535
HR Solutions	971			957			2,847			2,778
Intersegment elimination	(12		)	(6		)	(30		)	(20		)
Total revenue	$	2,737		$	2,723		$	8,399		$	8,293

Schedule of commissions, fees and other revenues by products

	ThreemonthsendedSeptember30,						NinemonthsendedSeptember30,
(in millions)	2012			2011			2012			2011
Retail brokerage	$	1,390		$	1,392		$	4,395		$	4,378
Reinsurance brokerage	377			365			1,156			1,119
Total Risk Solutions Segment	1,767			1,757			5,551			5,497
Consulting services	394			403			1,140			1,141
Outsourcing	585			558			1,723			1,655
Intrasegment	(8		)	(4		)	(16		)	(18		)
Total HR Solutions Segment	971			957			2,847			2,778
Intersegment	(12		)	(6		)	(30		)	(20		)
Total commissions, fees and other revenue	$	2,726		$	2,708		$	8,368		$	8,255

Schedule of fiduciary investment income by business segments

	ThreemonthsendedSeptember30,				NinemonthsendedSeptember30,
(in millions)	2012		2011		2012		2011
Risk Solutions	$	11	$	15	$	31	$	38
HR Solutions	-		-		-		-
Total fiduciary investment income	$	11	$	15	$	31	$	38

Schedule of reconciliation of segment income before tax to income from continuing operations before income taxes

	ThreemonthsendedSeptember30,						NinemonthsendedSeptember30,
(in millions)	2012			2011			2012			2011
Risk Solutions	$	309		$	311		$	1,059		$	1,036
HR Solutions	80			61			211			239
Segment income from continuing operations before income taxes	389			372			1,270			1,275
Unallocated expenses	(50		)	(44		)	(135		)	(109		)
Interest income	1			4			6			14
Interest expense	(57		)	(60		)	(173		)	(186		)
Other (expense) income	(9		)	20			3			6
Income from continuing operations before income taxes	$	274		$	292		$	971		$	1,000

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Segment Information

9 Months Ended

Sep. 30, 2012

Segment Information

Segment Information

17. Segment Information

The Company has two reportable segments: Risk Solutions and HR Solutions. Unallocated income and expenses, when combined with the operating segments and after the elimination of intersegment revenues and expenses, total to the amounts in the Condensed Consolidated Financial Statements.

Reportable operating segments have been determined using a management approach, which is consistent with the basis and manner in which Aon's chief operating decision-maker ("CODM") uses financial information for the purposes of allocating resources and evaluating performance. The CODM assesses performance based on operating income and generally accounts for inter-segment revenue as if the revenue were from third parties and at what management believes are current market prices. The Company does not present net assets by segment as this information is not reviewed by the CODM.

Risk Solutions acts as an advisor and insurance and reinsurance broker, helping clients manage their risks, via consultation, as well as negotiation and placement of insurance risk with insurance carriers through Aon's global distribution network.

HR Solutions partners with organizations to solve their most complex benefits, talent and related financial challenges, and improve business performance by designing, implementing, communicating and administering a wide range of human capital, retirement, investment management, health care, compensation and talent management strategies.

Effective January1, 2012, the Health and Benefits Consulting business was transferred from the HR Solutions segment to the Risk Solutions segment. All prior year amounts have been adjusted to reflect that transfer.

Aon's total revenue is as follows (in millions):

	ThreemonthsendedSeptember30,						NinemonthsendedSeptember30,
	2012			2011			2012			2011
Risk Solutions	$	1,778		$	1,772		$	5,582		$	5,535
HR Solutions	971			957			2,847			2,778
Intersegment elimination	(12		)	(6		)	(30		)	(20		)
Total revenue	$	2,737		$	2,723		$	8,399		$	8,293

Commissions, fees and other revenues by product are as follows (in millions):

	ThreemonthsendedSeptember30,						NinemonthsendedSeptember30,
	2012			2011			2012			2011
Retail brokerage	$	1,390		$	1,392		$	4,395		$	4,378
Reinsurance brokerage	377			365			1,156			1,119
Total Risk Solutions Segment	1,767			1,757			5,551			5,497
Consulting services	394			403			1,140			1,141
Outsourcing	585			558			1,723			1,655
Intrasegment	(8		)	(4		)	(16		)	(18		)
Total HR Solutions Segment	971			957			2,847			2,778
Intersegment	(12		)	(6		)	(30		)	(20		)
Total commissions, fees and other revenue	$	2,726		$	2,708		$	8,368		$	8,255

Fiduciary investment income by segment is as follows (in millions):

	ThreemonthsendedSeptember30,				NinemonthsendedSeptember30,
	2012		2011		2012		2011
Risk Solutions	$	11	$	15	$	31	$	38
HR Solutions	-		-		-		-
Total fiduciary investment income	$	11	$	15	$	31	$	38

A reconciliation of segment operating income before tax to income from continuing operations before income taxes is as follows (in millions):

	ThreemonthsendedSeptember30,						NinemonthsendedSeptember30,
	2012			2011			2012			2011
Risk Solutions	$	309		$	311		$	1,059		$	1,036
HR Solutions	80			61			211			239
Segment income from continuing operations before income taxes	389			372			1,270			1,275
Unallocated expenses	(50		)	(44		)	(135		)	(109		)
Interest income	1			4			6			14
Interest expense	(57		)	(60		)	(173		)	(186		)
Other (expense) income	(9		)	20			3			6
Income from continuing operations before income taxes	$	274		$	292		$	971		$	1,000

Unallocated expenses include administrative or other costs not attributable to the operating segments, such as corporate governance costs and the costs associated with corporate investments. Interest income represents income earned primarily on operating cash balances and certain income producing securities. Interest expense represents the cost of worldwide debt obligations.

Other (expense) income consists of equity earnings, realized gains or losses on the sale of investments, gains or losses on the disposal of businesses, gains or losses on hedging activities, and gains or losses on foreign currency transactions.

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Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 713	$ 730
Adjustments to reconcile net income to cash provided by operating activities:
Gain from sales of businesses, net	(1)	(4)
Depreciation of fixed assets	168	164
Amortization of intangible assets	313	273
Share-based compensation expense	160	179
Deferred income taxes	21	3
Change in assets and liabilities:
Fiduciary receivables	(447)	412
Short term investments - funds held on behalf of clients	118	(626)
Fiduciary liabilities	329	214
Receivables, net	240	(36)
Accounts payable and accrued liabilities	(347)	(227)
Restructuring reserves	(43)	(68)
Current income taxes	67	172
Pension and other post employment liabilities	(414)	(334)
Other assets and liabilities	(10)	(65)
CASH PROVIDED BY OPERATING ACTIVITIES	867	787
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	171	103
Purchases of long-term investments	(9)	(28)
Net sales of short-term investments - non-fiduciary	66	176
Acquisition of businesses, net of cash acquired	(97)	(102)
Proceeds from sale of businesses	2	9
Capital expenditures	(201)	(151)
CASH (USED FOR) PROVIDED BY INVESTING ACTIVITIES	(68)	7
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(625)	(828)
Issuance of shares for employee benefit plans	93	165
Issuance of debt	333	1,572
Repayment of debt	(427)	(1,523)
Cash dividends to shareholders	(153)	(150)
Purchase of shares from noncontrolling interests		(24)
Dividends paid to noncontrolling interests	(17)	(21)
CASH USED FOR FINANCING ACTIVITIES	(796)	(809)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	15	(36)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	18	(51)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	272	346
CASH AND CASH EQUIVALENTS AT END OF PERIOD	290	295
Supplemental disclosures:
Interest paid	172	216
Income taxes paid, net of refunds	$ 139	$ 74

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Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 210	$ 208	$ 713	$ 730
Less: Net income attributable to noncontrolling interests	6	10	25	28
Net income attributable to Aon shareholders	204	198	688	702
Other comprehensive income (loss), net of tax:
Change in fair value of derivatives	15	(9)	5	(14)
Foreign currency translation adjustments	164	(209)	71	(12)
Post-retirement benefit obligation	7	15	46	42
Total other comprehensive income (loss)	186	(203)	122	16
Less: Other comprehensive income (loss) attributable to noncontrolling interests	4	(1)	2	(1)
Total other comprehensive income (loss) attributable to Aon shareholders	182	(202)	120	17
Comprehensive income (loss) attributable to Aon shareholders	$ 386	$ (4)	$ 808	$ 719

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Shareholders' Equity

9 Months Ended

Sep. 30, 2012

Shareholders' Equity

Shareholders' Equity

10. Shareholders' Equity

Redomestication

Prior to the Redomestication, the Company accounted for purchases of its outstanding common stock using the treasury stock method included in U.S. GAAP. Under this method, the Company recorded purchases of its own outstanding common stock as a reduction to Additional paid-in capital based on the cost of the shares acquired. Under U.K. law, when the Company repurchases its outstanding shares, those shares are treated as cancelled. In April2012, the Company constructively cancelled 60 million shares of treasury stock related to the Redomestication. The impact of the cancellation of all outstanding treasury shares was a decrease in Ordinary shares and Retained earnings of $60 million and $2.4 billion, respectively. The balance of Treasury stock at cost of $2.5 billion was also eliminated as part of the cancellation. Additionally, effective upon the completion of the Redomestication, the par value of Aon's outstanding equity shares decreased from $1.00 to $0.01. The impact of this change was a decrease in Ordinary shares of $323 million, and an increase in Additional paid-in capital of $323 million.

As a U.K. incorporated company, Aon plc must have "distributable reserves" to repurchase shares or pay dividends to shareholders. Distributable reserves may be created through the earnings of the U.K. parent company and, amongst other methods, through a reduction in share capital approved by the English Companies Court. Distributable reserves are not linked to a U.S. GAAP reported amount. On April4, 2012, the Company received approval from the English Companies Court to reduce its share premium and in connection with that approval, recognized distributable reserves in the amount of $8 billion.

Ordinary Shares

In January2010, the Company's Board of Directors authorized a share repurchase program under which up to $2.0 billion of common stock may be repurchased ("2010 Share Repurchase Program"). Shares could be repurchased through the open market or in privately negotiated transactions, including structured repurchase programs, from time to time, based on prevailing market conditions, and were to be funded from available capital. Any repurchased shares were to be available for employee stock plans and for other corporate purposes.

During the three months ended March31, 2012, the Company repurchased 2.1 million shares at an average price per share of $48.32 for a total cost of $100 million under the 2010 Share Repurchase Program. Since the inception of the 2010 Share Repurchase Program, the Company repurchased a total of 18.2 million shares for an aggregate cost of $913 million as of March31, 2012.

The 2010 Share Repurchase Program, which related to common stock of Aon Corporation and preceded the Redomestication, did not extend to shares of Aon plc. In April2012, the Company's Board of Directors therefore authorized a share repurchase program under which up to $5.0 billion of ClassA ordinary shares may be repurchased ("2012 Share Repurchase Program"). Under this program, shares may be repurchased through the open market or in privately negotiated transactions, from time to time, based on prevailing market conditions, and will be funded from available capital.

During the three months ended September30, 2012, the Company repurchased 5.4 million shares at an average price per share of $51.37 for a total cost of $275 million. During the nine months ended September30, 2012, the Company repurchased 12.7 million shares at an average price per share of $49.22 for a total cost of $625 million under the 2012 Share Repurchase Program and the previously completed 2010 Share Repurchase Program. The remaining authorized amount for share repurchase under the 2012 Share Repurchase Program is $4.5 billion.

Participating Securities

Unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents, whether paid or unpaid, are participating securities, as defined, and therefore, should be included in computing basic and diluted earnings per share using the two class method. Certain of the Company's restricted share awards allow the holder to receive a non-forfeitable dividend equivalent.

Income from continuing operations,Income from discontinued operations and Net income, attributable to participating securities, were as follows (in millions):

	Threemonthsended September30,				Ninemonthsended September30,
	2012		2011		2012		2011
Income from continuing operations	$	2	$	3	$	8	$	11
Income from discontinued operations	-		-		-		-
Net income	$	2	$	3	$	8	$	11

Weighted average shares outstanding are as follows (in millions):

	Threemonthsended September30,		Ninemonthsended September30,
	2012	2011	2012	2011
Shares for basic earnings per share (1)	327.3	332.6	330.6	336.7
Common stock equivalents	3.7	4.3	3.8	5.1
Shares for diluted earnings per share	331.0	336.9	334.4	341.8

(1) Includes 4.5 million and 5.2 million of participating securities for the three months ended September30, 2012 and 2011, respectively, and 4.7 million and 5.5 million of participating securities for the nine months ended September30, 2012 and 2011, respectively.

Certain ordinary share equivalents, primarily related to options, were not included in the computation of diluted net income per share because their inclusion would have been antidilutive. The number of shares excluded from the calculation was 0.1 million and 1.0 million for the three months ended September30, 2012 and 2011, respectively, and 0.1 million and 0.1 million for the nine months ended September30, 2012 and 2011, respectively.

Accumulated Other Comprehensive Loss

The components of Accumulated other comprehensive loss, net of related tax, are as follows (in millions):

	September30, 2012			December31, 2011
Net derivative losses	$	(32	)	$	(37	)
Net foreign exchange translation adjustments	193			124
Net postretirement benefit obligations	(2,411		)	(2,457		)
Accumulated other comprehensive loss, net of tax	$	(2,250	)	$	(2,370	)

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Document and Entity Information	9 Months Ended
	Sep. 30, 2012
Document and Entity Information
Entity Registrant Name	Aon plc
Entity Central Index Key	0000315293
Document Type	10-Q
Document Period End Date	Sep. 30, 2012
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	318,667,385
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3

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Employee Benefits

9 Months Ended

Sep. 30, 2012

Employee Benefits

Employee Benefits

11. Employee Benefits

The following table provides the components of the net periodic benefit cost for Aon's U.S. pension plans, along with its most significant international pension plans, which are located in the U.K., the Netherlands, and Canada (in millions):

	ThreemonthsendedSeptember30,
	U.S.						International
	2012			2011			2012			2011
Service cost	$	-		$	-		$	4		$	5
Interest cost	29			31			66			67
Expected return on plan assets	(31		)	(30		)	(80		)	(73		)
Amortization of net actuarial loss	10			8			15			14
Net periodic benefit cost	$	8		$	9		$	5		$	13

	NinemonthsendedSeptember30,
	U.S.						International
	2012			2011			2012			2011
Service cost	$	-		$	-		$	12		$	15
Interest cost	89			92			198			201
Expected return on plan assets	(95		)	(90		)	(241		)	(217		)
Amortization of net actuarial loss	32			23			44			41
Net periodic benefit cost	$	26		$	25		$	13		$	40

Based on current assumptions, in 2012, Aon plans to contribute $226 million and $415 million to its U.S. and most significant international defined benefit pension plans, respectively. During the nine months ended September30, 2012, contributions of $195 million were made to the Company's U.S. pension plans and $259 million were made to its most significant international pension plans. On September30, 2012, the Company completed a merger of five of the seven legacy Aon and Hewitt UK pension plans into one single plan. In addition to decreasing management time and improving governance, additional benefits are expected to be derived through improved operational efficiencies, reduced advisor and asset manager costs, and a higher level of control over investments. In connection with this transaction, on October1, 2012, the Company made a discretionary contribution of approximately $80 million.

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Condensed Consolidated Statements of Financial Position (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 290	$ 272
Short-term investments	718	785
Receivables, net	2,959	3,183
Fiduciary assets	11,343	10,838
Other current assets	392	427
Total Current Assets	15,702	15,505
Goodwill	8,856	8,770
Intangible assets, net	3,040	3,276
Fixed assets, net	814	783
Investments	160	239
Other non-current assets	937	979
TOTAL ASSETS	29,509	29,552
CURRENT LIABILITIES
Fiduciary liabilities	11,343	10,838
Short-term debt and current portion of long-term debt	291	337
Accounts payable and accrued liabilities	1,519	1,832
Other current liabilities	801	753
Total Current Liabilities	13,954	13,760
Long-term debt	4,111	4,155
Pension, other post retirement and other post employment liabilities	1,757	2,192
Other non-current liabilities	1,326	1,325
TOTAL LIABILITIES	21,148	21,432
EQUITY
Ordinary shares (2012 - $0.01 nominal value; 2011 - $1.00 par value) Authorized: 750 shares (issued: 2012 - 318.7; 2011 - 386.4)	3	386
Additional paid-in capital	4,373	4,021
Retained earnings	6,179	8,594
Treasury shares at cost (shares: 2012 - 0; 2011 - 59.6)		(2,553)
Accumulated other comprehensive loss	(2,250)	(2,370)
TOTAL AON SHARESHOLDERS' EQUITY	8,305	8,078
Noncontrolling interests	56	42
TOTAL EQUITY	8,361	8,120
TOTAL LIABILITIES AND EQUITY	$ 29,509	$ 29,552

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Acquisitions and Dispositions

9 Months Ended

Sep. 30, 2012

Acquisitions and Dispositions

Acquisitions and Dispositions

5. Acquisitions and Dispositions

Acquisitions

During the nine months ended September30, 2012, the Company completed the acquisition of two businesses in the HR Solutions segment and four businesses in the Risk Solutions segment. During the nine months ended September30, 2011, the Company completed the acquisition of one business in the HR Solutions segment and two businesses in the Risk Solutions segment.

The following table includes the aggregate consideration transferred and the preliminary value of intangible assets recorded as a result of the Company's acquisitions.

	NinemonthsendedSeptember30,
(millions)	2012		2011
Consideration	$	110	$	100
Intangible assets:
Goodwill	$	60	$	58
Other intangible assets	56		29
	$	116	$	87

The results of operations of these acquisitions are included in the Condensed Consolidated Financial Statements as of the acquisition date. The results of operations of the Company would not have been materially different if these acquisitions had been reported from the beginning of the period.

Dispositions - Continuing Operations

During the nine months ended September30, 2012, the Company completed the sale of two businesses in the Risk Solutions segment and one business in the HR Solutions segment. A pretax gain of $1 million was recognized on these sales, which is included in Other (expense) income in the Condensed Consolidated Statements of Income. During the nine months ended September30, 2011, the Company completed the sale of two businesses in the Risk Solutions segment. A pretax loss of $2 million was recognized on these sales, which is included in Other (expense) income in the Condensed Consolidated Statements of Income.

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Other (Expense) Income

9 Months Ended

Sep. 30, 2012

Other (Expense) Income

Other (Expense) Income

4. Other (Expense) Income

Other (expense) income consists of the following (in millions):

	Threemonthsended September30,						Ninemonthsended September30,
	2012			2011			2012			2011
Equity earnings	$	-		$	5		$	8		$	9
Realized gain on sale of investments	9			1			11			10
Foreign currency remeasurement (losses) gains	(24		)	24			(24		)	18
Hedging gains (losses)	8			(11		)	8			(13		)
Loss on extinguishment of debt	-			-			-			(19		)
Other	(2		)	1			-			1
	$	(9	)	$	20		$	3		$	6

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Related Party Transactions

9 Months Ended

Sep. 30, 2012

Related Party Transactions

Related Party Transactions

16. Related Party Transactions

During the nine months ended September30, 2012, the Company, in the ordinary course of business, provided retail brokerage, consulting and financial advisory services to, and received wholesale brokerage services from, an entity that is controlled by one of the Company's shareholders. These transactions were negotiated on an arms-length basis and contain customary terms and conditions. During the three and nine months ended September30, 2012, commissions and fee revenue from these transactions were approximately $3 million and $11 million, respectively. During the three and nine months ended September30, 2011, commissions and fee revenue from these transactions was $3 million and $5 million, respectively.

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Share-Based Compensation Plans

9 Months Ended

Sep. 30, 2012

Share-Based Compensation Plans

Share-Based Compensation Plans

12. Share-Based Compensation Plans

The following table summarizes share-based compensation expense recognized in the Condensed Consolidated Statements of Income in Compensation and benefits (in millions):

	Threemonthsended				Ninemonthsended
	September30,				September30,
	2012		2011		2012		2011
Restricted stock units ("RSUs")	$	37	$	31	$	120	$	108
Performance share awards ("PSAs")	15		24		30		59
Stock options	1		2		4		7
Employee stock purchase plans	2		2		6		5
Total stock-based compensation expense	$	55	$	59	$	160	$	179

Share Awards

A summary of the status of the Company's RSUs is as follows (shares in thousands):

	NinemonthsendedSeptember30,
	2012				2011
	Shares		Fair Value(1)		Shares		Fair Value(1)
Non-vested at beginning of period	9,916		$	42	10,674		$	38
Granted	4,888		46		3,366		51
Vested	(3,343	)	42		(3,385	)	39
Forfeited	(516	)	44		(410	)	39
Non-vested at end of period	10,945		44		10,245		42

(1)Represents per share weighted average fair value of award at date of grant

Information as of September30, 2012 regarding the Company's PSAs granted during the nine months ended September30, 2012 and the years ended December31, 2011 and 2010, respectively, is as follows (shares in thousands, dollars in millions, except fair value):

	Asof September30, 2012		As of December 31,2011		As of December 31, 2010
Target PSAs granted	1,369		1,715		1,390
Fair value (1)	$	47	$	50	$	39
Number of shares that would be issued based on current performance levels	1,367		1,131		1,241
Unamortized expense, based on current performance levels	$	52	$	25	$	4

(1)Represents per share weighted average fair value of award at date of grant.

Share Options

In connection with its incentive compensation plans, the Company did not grant any share options in the nine months ended September30, 2012. During the nine months ended September30, 2011, the Company granted 80,000 share options at a weighted average exercise price of $53 per share. The weighted average volatility, expected dividend yield and risk-free rate assumed related to those options were 26.1%, 1.3% and 2.2%, respectively. The weighted average expected life was 5.5 years, and the weighted average estimated fair value per share was $10.92.

A summary of the status of the Company's share options and related information is as follows (shares in thousands):

	NinemonthsendedSeptember30,
	2012				2011
	Shares		Weighted-Average ExercisePrice		Shares		Weighted-Average ExercisePrice
Beginning outstanding	9,116		$	32	13,919		$	32
Granted	-		-		80		53
Exercised	(2,570	)	31		(3,781	)	32
Forfeited and expired	(67	)	37		(300	)	37
Outstanding at end of period	6,479		32		9,918		32
Exercisable at end of period	5,969		31		8,566		30

The weighted average remaining contractual life, in years, of outstanding options was 2.8 years and 3.3 years at September30, 2012 and 2011, respectively.

The aggregate intrinsic value represents the total pretax intrinsic value, based on options with an exercise price less than the Company's closing stock price of $52.29 as of September30, 2012, which would have been received by the option holders had those option holders exercised their options as of that date. At September30, 2012, the aggregate intrinsic value of options outstanding was $131 million, of which $125 million was exercisable.

Other information related to the Company's share options is as follows (in millions):

	Threemonthsended				Ninemonthsended
	September30,				September30,
	2012		2011		2012		2011
Aggregate intrinsic value of stock options exercised	$	23	$	4	$	47	$	69
Cash received from the exercise of stock options	29		8		80		129
Tax benefit realized from the exercise of stock options	5		-		8		12

Unamortized deferred compensation expense, which includes both options and awards, amounted to $329 million as of September30, 2012, with a remaining weighted-average amortization period of approximately 2.1 years.

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Investments

9 Months Ended

Sep. 30, 2012

Investments

Investments

8. Investments

The Company earns income on cash balances and investments, as well as on premium trust balances that the Company maintains for premiums collected from insureds but not yet remitted to insurance companies, and funds held under the terms of certain outsourcing agreements to pay certain obligations on behalf of clients. Premium trust balances and a corresponding liability are included in Fiduciary assets and Fiduciary liabilities in the accompanying Condensed Consolidated Statements of Financial Position.

The Company's interest-bearing assets and other investments are included in the following categories in the Condensed Consolidated Statements of Financial Position (in millions):

	September30,		December31,
	2012		2011
Cash and cash equivalents	$	290	$	272
Short-term investments	718		785
Fiduciary assets (1)	4,147		4,190
Investments	160		239
	$	5,315	$	5,486

(1) Fiduciary assets include funds held on behalf of clients but does not include fiduciary receivables.

The Company's investments are as follows (in millions):

	September30,		December31,
	2012		2011
Equity method investments (2)	$	103	$	164
Other investments, at cost	39		60
Fixed-maturity securities	18		15
	$	160	$	239

(2) The reduction in equity method investments is primarily due to redemptions.

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Commitments and Contingencies (Details)	9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended		1 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2012 Five-Year Agreement	May 31, 2010 Opry Mills Mall Limited Partnership USD ($)	Sep. 30, 2012 Commitments to fund certain limited partnerships or subsidiaries USD ($)	Sep. 30, 2012 Commitments to fund certain limited partnerships or subsidiaries USD ($)	Apr. 02, 2012 Commitments to fund certain limited partnerships or subsidiaries Subsidiaries Term Credit Agreement USD ($)	Apr. 30, 2012 Commitments to fund certain limited partnerships or subsidiaries Subsidiaries Five-Year Agreement	Apr. 02, 2012 Commitments to fund certain limited partnerships or subsidiaries Subsidiaries Five-Year Agreement USD ($)	Apr. 02, 2012 Commitments to fund certain limited partnerships or subsidiaries Subsidiaries Euro Facility Agreement EUR (€)
Legal, Guarantees and Indemnifications
Agreed upon payment in exchange for dismissal of class claims	$ 550,000
Damages sought by Opry Mills Mall Limited Partnership			200,000,000
Amount of coverage for damages contended by the insurers			50,000,000
Difference amount of damages sought by the client			150,000,000
Estimated exposure with respect to contractual contingent guarantees for premium payments owed by clients	36,000,000
Maximum potential funding under commitments				55,000,000	55,000,000	450,000,000		400,000,000	650,000,000
Term of credit agreement		5 years					5 years
Commitments funded				$ 4,000,000	$ 8,000,000

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Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2012

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

6. Goodwill and Other Intangible Assets

The change in the net carrying amount of goodwill by operating segment for the nine months ended September30, 2012 is as follows (in millions):

	Risk Solutions			HR Solutions			Total
Balance as of December31, 2011	$	5,557		$	3,213		$	8,770
Goodwill related to current year acquisitions	55			5			60
Goodwill related to other prior year acquisitions	(6		)	-			(6		)
Transfer related to Health and Benefits Consulting (1)	313			(313		)	-
Foreign currency translation	18			14			32
Balance as of September30, 2012	$	5,937		$	2,919		$	8,856

(1) Effective January1, 2012, the Health and Benefits Consulting business was transferred from the HR Solutions segment to the Risk Solutions segment.

Other intangible assets by asset class are as follows (in millions):

	September30,2012						December31,2011
	Gross Carrying Amount		Accumulated Amortization		NetCarrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Intangible assets with indefinite lives:
Trademarks	$	1,024	$	-	$	1,024	$	1,024	$	-	$	1,024
Intangible assets with finite lives:
Trademarks	6		2		4		4		1		3
Customer related and contract based	2,671		874		1,797		2,608		615		1,993
Marketing, technology and other	609		394		215		606		350		256
	$	4,310	$	1,270	$	3,040	$	4,242	$	966	$	3,276

Amortization expense from finite lived intangible assets was $105 million and $313 million for the three and nine months ended September30, 2012, respectively. Amortization expense from finite lived intangible assets was $91 million and $273 million for the three and nine months ended September30, 2011, respectively.

The estimated future amortization for intangible assets as of September30, 2012 is as follows (in millions):

	HRSolutions		RiskSolutions		Total
Remainder of 2012	$	76	$	32	$	108
2013	278		112		390
2014	240		96		336
2015	210		82		292
2016	175		70		245
Thereafter	478		167		645
	$	1,457	$	559	$	2,016

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Restructuring

9 Months Ended

Sep. 30, 2012

Restructuring

Restructuring

7. Restructuring

Aon Hewitt Restructuring Plan

On October14, 2010, Aon announced a global restructuring plan ("Aon Hewitt Plan") in connection with the acquisition of Hewitt Associates,Inc. The Aon Hewitt Plan is intended to streamline operations across the combined Aon Hewitt organization and includes approximately 2,000 job eliminations. The Company expects these restructuring activities and related expenses to affect continuing operations into 2013. The Aon Hewitt Plan is expected to result in cumulative costs of approximately $325 million through the end of the plan, consisting of approximately $180 million in employee termination costs and approximately $145 million in real estate rationalization costs across the Company.

From the inception of the Aon Hewitt Plan through September30, 2012, in excess of 1,800 jobs have been eliminated and total expenses of $214 million have been incurred. The Company recorded $32 million and $57 million of restructuring and related charges in the three and nine months ended September30, 2012, respectively. The Company recorded $26 million and $80 million of restructuring and related charges in the three and nine months ended September30, 2011, respectively. Charges related to the restructuring are included in Compensation and benefits and Other general expenses in the accompanying Condensed Consolidated Statements of Income.

The following summarizes restructuring and related costs by type that have been incurred and are estimated to be incurred through the end of the restructuring initiative related to the Aon Hewitt Plan (in millions):

	2010		2011		ThirdQuarter 2012		NineMonths 2012		Total Inceptionto Date		Estimated TotalCostfor Restructuring Plan(1)
Workforce reduction	$	49	$	64	$	25	$	44	$	157	$	180
Lease consolidation	3		32		6		11		46		95
Asset impairments	-		7		-		1		8		47
Other costs associated with restructuring (2)	-		2		1		1		3		3
Total restructuring and related expenses	$	52	$	105	$	32	$	57	$	214	$	325

(1) Actual costs, when incurred, will vary due to changes in the assumptions built into this plan. Significant assumptions likely to change when plans are finalized and implemented include, but are not limited to, changes in severance calculations, changes in the assumptions underlying sublease loss calculations due to changing market conditions, and changes in the overall analysis that might cause the Company to add or cancel component initiatives.

(2) Other costs associated with restructuring initiatives, including moving costs and consulting and legal fees, are recognized when incurred.

Effective January1, 2012, the Health and Benefits Consulting business was transferred from the HR Solutions segment to the Risk Solutions segment. Restructuring costs associated with the Health and Benefits Consulting business are reflected in the Risk Solutions segment, including $41 million that was reclassified from the HR Solutions segment to the Risk Solutions segment for 2011. During the third quarter 2011, $26 million in restructuring expenses were recorded, $14 million of which related to the Health and Benefits Consulting business. The following summarizes the restructuring and related expenses, by segment, that have been incurred and are estimated to be incurred through the end of the restructuring initiative related to the Aon Hewitt Plan (in millions):

	2010		2011		ThirdQuarter 2012		NineMonths 2012		Total Inceptionto Date		Estimated TotalCostfor Restructuring Plan
HR Solutions	$	52	$	49	$	16	$	36	$	137	$	243
Risk Solutions	-		56		16		21		77		82
Total restructuring and related expenses	$	52	$	105	$	32	$	57	$	214	$	325

Aon Benfield Restructuring Plan

The Company announced a global restructuring plan ("Aon Benfield Plan") in conjunction with its acquisition of Benfield in 2008. The Aon Benfield Plan was intended to integrate and streamline operations across the combined Aon Benfield organization. The Aon Benfield Plan included 810 job eliminations. Additionally, duplicate space and assets were abandoned. The Company incurred all remaining costs for the Aon Benfield Plan and the plan was closed in the first quarter 2012.

The Company recorded $8 million of restructuring and related charges in the nine months ended September30, 2012. The Company recorded $3 million of restructuring and related charges in the three months ended September30, 2011, and a net restructuring benefit of $2 million in the nine months ended September30, 2011. All costs associated with the Aon Benfield Plan are included in the Risk Solutions segment. Charges related to the restructuring are included in Compensation and benefits and Other general expenses in the accompanying Condensed Consolidated Statements of Income.

The following summarizes the restructuring and related costs by type that have been incurred through the end of the restructuring initiative related to the Aon Benfield Plan (in millions):

	Purchase Price Allocation		2009		2010		2011			ThirdQuarter 2012		NineMonths 2012		Inceptionto Date		TotalCostfor Restructuring Plan
Workforce reduction	$	32	$	38	$	15	$	33		$	-	$	8	$	126	$	126
Lease consolidation	20		14		7		(15		)	-		-		26		26
Asset impairments	-		2		2		-			-		-		4		4
Other costs associated with restructuring	1		1		2		1			-		-		5		5
Total restructuring and related expenses	$	53	$	55	$	26	$	19		$	-	$	8	$	161	$	161

As of September30, 2012, the Company's liabilities for its restructuring plans are as follows (in millions):

	AonHewitt Plan			AonBenfield Plan			2007Plan			Other			Total
Balance at December31, 2011	$	95		$	20		$	50		$	8		$	173
Expensed	56			8			-			-			64
Cash payments	(71		)	(20		)	(15		)	(3		)	(109		)
Foreign exchange translation and other	-			1			2			-			3
Balance at September30, 2012	$	80		$	9		$	37		$	5		$	131

XML

Debt

9 Months Ended

Sep. 30, 2012

Debt

Debt

9. Debt

The Company uses proceeds from the commercial paper market from time to time in order to meet short-term working capital needs. At September30, 2012, the Company had no commercial paper outstanding when compared to the $50 million of commercial paper outstanding at December31, 2011. The weighted average commercial paper outstanding for the three and nine months ended September30, 2012 was $15 million and $41 million, respectively. The weighted average interest rate of the commercial paper outstanding for the three and nine months ended September30, 2012 was 0.52% and 0.51%, respectively.

On March20, 2012, the Company entered into a $400 million five year credit agreement ("Revolving Credit Agreement"). Borrowings under the Revolving Credit Agreement will bear interest, at the Company's option, at a rate equal to either (a)the rate for eurodollar deposits as reflected on the applicable Reuters LIBOR01 pagefor the interest period relevant to such borrowing ("Eurodollar Rate"), plus the applicable margin or (b)the highest of (i)the rate of interest publicly announced by Citibank as its prime rate, (ii)the federal funds effective rate from time to time plus 0.5% and (iii)the one month Eurodollar rate plus 1.0%, in each case plus the applicable margin. The applicable margin for borrowings under the Revolving Credit Agreement may change depending on achievement of certain public debt ratings. The Revolving Credit Agreement has a maturity date of March20, 2017 and contains covenants with respect to the ratio of consolidated funded debt to consolidated adjusted EBITDA (which may not be more than the lower of (a)3.25 to 1.00 or (b)the greater of (i)3.00 to 1.00 or (ii)the lowest ratio of consolidated funded debt to consolidated adjusted EBITDA then set forth in certain of Aon's other credit facilities), as well as other customary covenants, undertakings and events of default. In conjunction with the Company entering into the Revolving Credit Agreement, the prior revolving credit agreement dated December4, 2009 was terminated. There were no borrowings on the Revolving Credit Agreement at September30, 2012. On April2, 2012, in connection with the Redomestication, Aon plc became party to the Revolving Credit Agreement and guaranteed the obligations of Aon Corporation thereunder. The Company was in compliance with all debt covenants as of September30, 2012.

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Guarantee of Registered Securities (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues
Commissions, fees and other	$ 2,726,000,000	$ 2,708,000,000	$ 8,368,000,000	$ 8,255,000,000
Fiduciary investment income	11,000,000	15,000,000	31,000,000	38,000,000
Total revenue	2,737,000,000	2,723,000,000	8,399,000,000	8,293,000,000
Expenses
Compensation and benefits	1,620,000,000	1,634,000,000	4,920,000,000	4,843,000,000
Other general expenses	778,000,000	761,000,000	2,344,000,000	2,284,000,000
Total operating expenses	2,398,000,000	2,395,000,000	7,264,000,000	7,127,000,000
Operating income	339,000,000	328,000,000	1,135,000,000	1,166,000,000
Interest income	1,000,000	4,000,000	6,000,000	14,000,000
Interest expense	(57,000,000)	(60,000,000)	(173,000,000)	(186,000,000)
Other (expense) income	(9,000,000)	20,000,000	3,000,000	6,000,000
Income from continuing operations before income taxes	274,000,000	292,000,000	971,000,000	1,000,000,000
Income tax (benefit) expense	64,000,000	84,000,000	257,000,000	274,000,000
Income from continuing operations	210,000,000	208,000,000	714,000,000	726,000,000
Loss from discontinued operations before income taxes			(1,000,000)	5,000,000
Income taxes				1,000,000
(Loss) income from discontinued operations			(1,000,000)	4,000,000
Net income	210,000,000	208,000,000	713,000,000	730,000,000
Less: Net income attributable to noncontrolling interests	6,000,000	10,000,000	25,000,000	28,000,000
Net income attributable to Aon shareholders	204,000,000	198,000,000	688,000,000	702,000,000
Comprehensive income attributable to Aon stockholders
Net (loss) income	210,000,000	208,000,000	713,000,000	730,000,000
Less: Net income attributable to noncontrolling interests	6,000,000	10,000,000	25,000,000	28,000,000
Net income attributable to Aon stockholders	204,000,000	198,000,000	688,000,000	702,000,000
Other comprehensive income (loss), net of tax:
Change in fair value of derivatives	15,000,000	(9,000,000)	5,000,000	(14,000,000)
Foreign currency translation adjustments	164,000,000	(209,000,000)	71,000,000	(12,000,000)
Post-retirement benefit obligation	7,000,000	15,000,000	46,000,000	42,000,000
Total other comprehensive income (loss)	186,000,000	(203,000,000)	122,000,000	16,000,000
Less: Other comprehensive loss attributable to noncontrolling interests	4,000,000	(1,000,000)	2,000,000	(1,000,000)
Total other comprehensive income (loss) attributable to Aon shareholders	182,000,000	(202,000,000)	120,000,000	17,000,000
Comprehensive income (loss) attributable to Aon shareholders	386,000,000	(4,000,000)	808,000,000	719,000,000
Parent Guarantor
Financial Information for Subsidiary Guarantors and Non Guarantors
Parent company's percentage ownership of guarantors	100.00%		100.00%
Expenses
Compensation and benefits	34,000,000		18,000,000
Other general expenses	19,000,000		21,000,000
Total operating expenses	53,000,000		39,000,000
Operating income	(53,000,000)		(39,000,000)
Intercompany interest (expense) income	(8,000,000)		(10,000,000)
Income from continuing operations before income taxes	(61,000,000)		(49,000,000)
Income tax (benefit) expense	(15,000,000)
Income from continuing operations	(46,000,000)		(49,000,000)
Equity in earnings of subsidiaries, net of tax	250,000,000	198,000,000	737,000,000	702,000,000
Net income	204,000,000	198,000,000	688,000,000	702,000,000
Net income attributable to Aon shareholders	204,000,000	198,000,000	688,000,000	702,000,000
Comprehensive income attributable to Aon stockholders
Net (loss) income	204,000,000	198,000,000	688,000,000	702,000,000
Net income attributable to Aon stockholders	204,000,000	198,000,000	688,000,000	702,000,000
Other comprehensive income (loss), net of tax:
Equity in other comprehensive (loss) income of subsidiary, net of tax	182,000,000	(202,000,000)	120,000,000	17,000,000
Total other comprehensive income (loss) attributable to Aon shareholders	182,000,000	(202,000,000)	120,000,000	17,000,000
Comprehensive income (loss) attributable to Aon shareholders	386,000,000	(4,000,000)	808,000,000	719,000,000
Subsidiary Issuer
Revenues
Fiduciary investment income				2,000,000
Total revenue				2,000,000
Expenses
Compensation and benefits	(11,000,000)	(2,000,000)	22,000,000	(7,000,000)
Other general expenses	6,000,000	20,000,000	26,000,000	40,000,000
Total operating expenses	(5,000,000)	18,000,000	48,000,000	33,000,000
Operating income	5,000,000	(18,000,000)	(48,000,000)	(31,000,000)
Interest income			1,000,000	4,000,000
Interest expense	(44,000,000)	(40,000,000)	(124,000,000)	(131,000,000)
Intercompany interest (expense) income	48,000,000	47,000,000	140,000,000	135,000,000
Other (expense) income	10,000,000		12,000,000	(27,000,000)
Income from continuing operations before income taxes	19,000,000	(11,000,000)	(19,000,000)	(50,000,000)
Income tax (benefit) expense	11,000,000	(3,000,000)	(4,000,000)	(18,000,000)
Income from continuing operations	8,000,000	(8,000,000)	(15,000,000)	(32,000,000)
Loss from discontinued operations before income taxes				5,000,000
Income taxes				1,000,000
(Loss) income from discontinued operations				4,000,000
Equity in earnings of subsidiaries, net of tax	209,000,000	174,000,000	662,000,000	628,000,000
Net income	217,000,000	166,000,000	647,000,000	600,000,000
Net income attributable to Aon shareholders	217,000,000	166,000,000	647,000,000	600,000,000
Comprehensive income attributable to Aon stockholders
Net (loss) income	217,000,000	166,000,000	647,000,000	600,000,000
Net income attributable to Aon stockholders	217,000,000	166,000,000	647,000,000	600,000,000
Other comprehensive income (loss), net of tax:
Change in fair value of derivatives	1,000,000		1,000,000	(1,000,000)
Foreign currency translation adjustments	17,000,000	(5,000,000)	16,000,000	(9,000,000)
Post-retirement benefit obligation	9,000,000	4,000,000	24,000,000	13,000,000
Total other comprehensive income (loss)	27,000,000	(1,000,000)	41,000,000	3,000,000
Equity in other comprehensive (loss) income of subsidiary, net of tax	155,000,000	(201,000,000)	78,000,000	12,000,000
Total other comprehensive income (loss) attributable to Aon shareholders	182,000,000	(202,000,000)	119,000,000	15,000,000
Comprehensive income (loss) attributable to Aon shareholders	399,000,000	(36,000,000)	766,000,000	615,000,000
Other non-guarantor subsidiaries
Revenues
Commissions, fees and other	2,726,000,000	2,708,000,000	8,368,000,000	8,255,000,000
Fiduciary investment income	11,000,000	15,000,000	31,000,000	36,000,000
Total revenue	2,737,000,000	2,723,000,000	8,399,000,000	8,291,000,000
Expenses
Compensation and benefits	1,597,000,000	1,636,000,000	4,880,000,000	4,850,000,000
Other general expenses	753,000,000	741,000,000	2,297,000,000	2,245,000,000
Total operating expenses	2,350,000,000	2,377,000,000	7,177,000,000	7,095,000,000
Operating income	387,000,000	346,000,000	1,222,000,000	1,196,000,000
Interest income	1,000,000	4,000,000	5,000,000	10,000,000
Interest expense	(13,000,000)	(20,000,000)	(49,000,000)	(55,000,000)
Intercompany interest (expense) income	(40,000,000)	(47,000,000)	(130,000,000)	(135,000,000)
Other (expense) income	(19,000,000)	20,000,000	(9,000,000)	33,000,000
Income from continuing operations before income taxes	316,000,000	303,000,000	1,039,000,000	1,049,000,000
Income tax (benefit) expense	68,000,000	87,000,000	261,000,000	292,000,000
Income from continuing operations	248,000,000	216,000,000	778,000,000	757,000,000
Loss from discontinued operations before income taxes			(1,000,000)
(Loss) income from discontinued operations			(1,000,000)
Equity in earnings of subsidiaries, net of tax	217,000,000	166,000,000	647,000,000	600,000,000
Net income	465,000,000	382,000,000	1,424,000,000	1,357,000,000
Less: Net income attributable to noncontrolling interests	6,000,000	10,000,000	25,000,000	28,000,000
Net income attributable to Aon shareholders	459,000,000	372,000,000	1,399,000,000	1,329,000,000
Comprehensive income attributable to Aon stockholders
Net (loss) income	465,000,000	382,000,000	1,424,000,000	1,357,000,000
Less: Net income attributable to noncontrolling interests	6,000,000	10,000,000	25,000,000	28,000,000
Net income attributable to Aon stockholders	459,000,000	372,000,000	1,399,000,000	1,329,000,000
Other comprehensive income (loss), net of tax:
Change in fair value of derivatives	14,000,000	(9,000,000)	4,000,000	(13,000,000)
Foreign currency translation adjustments	147,000,000	(204,000,000)	55,000,000	(3,000,000)
Post-retirement benefit obligation	(2,000,000)	11,000,000	22,000,000	29,000,000
Total other comprehensive income (loss)	159,000,000	(202,000,000)	81,000,000	13,000,000
Equity in other comprehensive (loss) income of subsidiary, net of tax	182,000,000	(202,000,000)	119,000,000	15,000,000
Less: Other comprehensive loss attributable to noncontrolling interests	4,000,000	(1,000,000)	2,000,000	(1,000,000)
Total other comprehensive income (loss) attributable to Aon shareholders	337,000,000	(403,000,000)	198,000,000	29,000,000
Comprehensive income (loss) attributable to Aon shareholders	796,000,000	(31,000,000)	1,597,000,000	1,358,000,000
Consolidating adjustments
Expenses
Equity in earnings of subsidiaries, net of tax	(676,000,000)	(538,000,000)	(2,046,000,000)	(1,930,000,000)
Net income	(676,000,000)	(538,000,000)	(2,046,000,000)	(1,930,000,000)
Net income attributable to Aon shareholders	(676,000,000)	(538,000,000)	(2,046,000,000)	(1,930,000,000)
Comprehensive income attributable to Aon stockholders
Net (loss) income	(676,000,000)	(538,000,000)	(2,046,000,000)	(1,930,000,000)
Net income attributable to Aon stockholders	(676,000,000)	(538,000,000)	(2,046,000,000)	(1,930,000,000)
Other comprehensive income (loss), net of tax:
Equity in other comprehensive (loss) income of subsidiary, net of tax	(519,000,000)	605,000,000	(317,000,000)	(44,000,000)
Total other comprehensive income (loss) attributable to Aon shareholders	(519,000,000)	605,000,000	(317,000,000)	(44,000,000)
Comprehensive income (loss) attributable to Aon shareholders	$ (1,195,000,000)	$ 67,000,000	$ (2,363,000,000)	$ (1,974,000,000)
7.375% Debt securities due December 2012
Financial Information for Subsidiary Guarantors and Non Guarantors
Debt Instrument, Variable Rate (as a percent)	7.375%		7.375%
3.50% senior notes due September 2015
Financial Information for Subsidiary Guarantors and Non Guarantors
Debt Instrument, Variable Rate (as a percent)	3.50%		3.50%
3.125% Senior notes due 2016
Financial Information for Subsidiary Guarantors and Non Guarantors
Debt Instrument, Variable Rate (as a percent)	3.125%		3.125%
5.00% Senior notes due September 2020
Financial Information for Subsidiary Guarantors and Non Guarantors
Debt Instrument, Variable Rate (as a percent)	5.00%		5.00%
8.205% Junior subordinated deferrable interest debentures due January 2027
Financial Information for Subsidiary Guarantors and Non Guarantors
Debt Instrument, Variable Rate (as a percent)	8.205%		8.205%
6.25% Senior notes due September 2040
Financial Information for Subsidiary Guarantors and Non Guarantors
Debt Instrument, Variable Rate (as a percent)	6.25%		6.25%

XML

Guarantee of Registered Securities (Details 3) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
CASH PROVIDED BY (USED FOR) OPERATING ACTIVITIES	$ 867	$ 787
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	171	103
Purchases of long-term investments	(9)	(28)
Net sales of short-term investments - non-fiduciary	66	176
Acquisition of businesses, net of cash acquired	(97)	(102)
Proceeds from sale of businesses	2	9
Capital expenditures	(201)	(151)
CASH (USED FOR) PROVIDED BY INVESTING ACTIVITIES	(68)	7
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(625)	(828)
Issuance of shares for employee benefit plans	93	165
Issuance of debt	333	1,572
Repayment of debt	(427)	(1,523)
Cash dividends to shareholders	(153)	(150)
Purchase of shares from noncontrolling interests		(24)
Dividends paid to noncontrolling interests	(17)	(21)
CASH USED FOR FINANCING ACTIVITIES	(796)	(809)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	15	(36)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	18	(51)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	272	346
CASH AND CASH EQUIVALENTS AT END OF PERIOD	290	295
Parent Guarantor
CASH FLOWS FROM OPERATING ACTIVITIES
CASH PROVIDED BY (USED FOR) OPERATING ACTIVITIES	(46)
CASH FLOWS FROM INVESTING ACTIVITIES
Net sales of short-term investments - non-fiduciary	(16)
CASH (USED FOR) PROVIDED BY INVESTING ACTIVITIES	(16)
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(525)
Advances from (to) affiliates	648
Issuance of shares for employee benefit plans	44
Cash dividends to shareholders	(104)
CASH USED FOR FINANCING ACTIVITIES	63
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1
Subsidiary Issuer
CASH FLOWS FROM OPERATING ACTIVITIES
CASH PROVIDED BY (USED FOR) OPERATING ACTIVITIES	(189)	(137)
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	79	52
Purchases of long-term investments	(9)	(17)
Net sales of short-term investments - non-fiduciary	61	329
Acquisition of businesses, net of cash acquired	(55)	(10)
Proceeds from sale of businesses		5
CASH (USED FOR) PROVIDED BY INVESTING ACTIVITIES	76	359
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(100)	(828)
Advances from (to) affiliates	376	487
Issuance of shares for employee benefit plans	49	165
Issuance of debt	332	1,190
Repayment of debt	(416)	(1,126)
Cash dividends to shareholders	(49)	(150)
CASH USED FOR FINANCING ACTIVITIES	192	(262)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	79	(40)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	(21)	14
CASH AND CASH EQUIVALENTS AT END OF PERIOD	58	(26)
Other non-guarantor subsidiaries
CASH FLOWS FROM OPERATING ACTIVITIES
CASH PROVIDED BY (USED FOR) OPERATING ACTIVITIES	1,102	924
CASH FLOWS FROM INVESTING ACTIVITIES
Sales of long-term investments	92	51
Purchases of long-term investments		(11)
Net sales of short-term investments - non-fiduciary	21	(153)
Acquisition of businesses, net of cash acquired	(42)	(92)
Proceeds from sale of businesses	2	4
Capital expenditures	(201)	(151)
CASH (USED FOR) PROVIDED BY INVESTING ACTIVITIES	(128)	(352)
CASH FLOWS FROM FINANCING ACTIVITIES
Advances from (to) affiliates	(1,024)	(487)
Issuance of debt	1	382
Repayment of debt	(11)	(397)
Purchase of shares from noncontrolling interests		(24)
Dividends paid to noncontrolling interests	(17)	(21)
CASH USED FOR FINANCING ACTIVITIES	(1,051)	(547)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	15	(36)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(62)	(11)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	293	332
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 231	$ 321

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Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 item	Sep. 30, 2011
Segment Information
Number of reportable segments			2
Segment Reporting Information
Revenue	$ 2,737	$ 2,723	$ 8,399	$ 8,293
Commissions, fees and other revenues	2,726	2,708	8,368	8,255
Fiduciary investment income	11	15	31	38
Operating income from continuing operations before income taxes	339	328	1,135	1,166
Interest income	1	4	6	14
Interest expense	(57)	(60)	(173)	(186)
Other (expense) income	(9)	20	3	6
Income from continuing operations before income taxes	274	292	971	1,000
Total operating segments
Segment Reporting Information
Operating income from continuing operations before income taxes	389	372	1,270	1,275
Risk Solutions
Segment Reporting Information
Revenue	1,778	1,772	5,582	5,535
Commissions, fees and other revenues	1,767	1,757	5,551	5,497
Fiduciary investment income	11	15	31	38
Operating income from continuing operations before income taxes	309	311	1,059	1,036
Retail brokerage
Segment Reporting Information
Commissions, fees and other revenues	1,390	1,392	4,395	4,378
Reinsurance brokerage
Segment Reporting Information
Commissions, fees and other revenues	377	365	1,156	1,119
HR Solutions
Segment Reporting Information
Revenue	971	957	2,847	2,778
Commissions, fees and other revenues	971	957	2,847	2,778
Operating income from continuing operations before income taxes	80	61	211	239
Consulting services
Segment Reporting Information
Commissions, fees and other revenues	394	403	1,140	1,141
Outsourcing
Segment Reporting Information
Commissions, fees and other revenues	585	558	1,723	1,655
Intrasegment
Segment Reporting Information
Commissions, fees and other revenues	(8)	(4)	(16)	(18)
Intersegment elimination
Segment Reporting Information
Revenue	(12)	(6)	(30)	(20)
Commissions, fees and other revenues	(12)	(6)	(30)	(20)
Unallocated Expense
Segment Reporting Information
Operating income from continuing operations before income taxes	$ (50)	$ (44)	$ (135)	$ (109)

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Derivatives and Hedging (Tables)

9 Months Ended

Sep. 30, 2012

Derivatives and Hedging

Notional and fair values of derivative instruments

	NotionalAmount				DerivativeAssets (1)				DerivativeLiabilities (2)
(in millions)	September30, 2012		December31, 2011		September30, 2012		December31, 2011		September30, 2012		December31, 2011
Derivatives accounted for as hedges:
Interest rate contracts	$	342	$	702	$	16	$	16	$	-	$	-
Foreign exchange contracts	1,224		1,297		224		140		283		188
Total	1,566		1,999		240		156		283		188
Derivatives not accounted for as hedges:
Foreign exchange contracts	187		246		2		1		1		1
Total	$	1,753	$	2,245	$	242	$	157	$	284	$	189

(1)Included within Other current assets or Other non-current assets

(2)Included within Other current liabilities or Other non-current liabilities

Derivative gains (losses)

	ThreemonthsendedSeptember 30,						NinemonthsendedSeptember 30,
(in millions)	2012			2011			2012			2011
Gain (Loss) recognized in Accumulated Other Comprehensive Loss:
Cash Flow Hedges:
Interest rate contracts (1)	$	-		$	1		$	-		$	(1	)
Foreign exchange contracts (2)	16			(10		)	(14		)	(31		)
Total	16			(9		)	(14		)	(32		)
Foreign Net Investment Hedges:
Foreign exchange contracts	$	3		$	13		$	4		$	(4	)
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):
Cash Flow Hedges:
Interest rate contracts (1)	$	-		$	-		$	-		$	1
Foreign exchange contracts (2)	(7		)	3			(23		)	(12		)
Total	(7		)	3			(23		)	(11		)
Foreign Net Investment Hedges:
Foreign exchange contracts	$	-		$	-		$	-		$	-

(1)Included within Fiduciary investment income and Interest expense

(2)Included within Other (expense) income and Interest expense

	ThreemonthsendedSeptember30,						NinemonthsendedSeptember30,
	AmountofGain(Loss) RecognizedinIncomeon Derivative(1)			AmountofGain(Loss) RecognizedinIncomeon RelatedHedgeItem(2)			AmountofGain(Loss) RecognizedinIncomeon Derivative(1)		AmountofGain(Loss) RecognizedinIncomeon RelatedHedgeItem(2)
	2012		2011	2012	2011		2012	2011	2012	2011
Fair value hedges:
Foreign exchange contracts	(3	)	2	3	(3	)	-	-	-	1

(1)Relates to fixed rate debt

(2)Included in Interest expense

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Employee Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		0 Months Ended
	Sep. 30, 2012 U.S. Pension Plan	Sep. 30, 2011 U.S. Pension Plan	Sep. 30, 2012 U.S. Pension Plan	Sep. 30, 2011 U.S. Pension Plan	Sep. 30, 2012 International Pension Plan	Sep. 30, 2011 International Pension Plan	Sep. 30, 2012 International Pension Plan	Sep. 30, 2011 International Pension Plan	Oct. 01, 2012 Retirement Plans Merger	Sep. 30, 2012 Retirement Plans Merger item
Defined Benefit Plan Disclosure
Service cost					$ 4	$ 5	$ 12	$ 15
Interest cost	29	31	89	92	66	67	198	201
Expected return on plan assets	(31)	(30)	(95)	(90)	(80)	(73)	(241)	(217)
Amortization of net actuarial loss	10	8	32	23	15	14	44	41
Net periodic benefit cost	8	9	26	25	5	13	13	40
Estimate of contributions to defined benefit pension plans for the current fiscal year	226		226		415		415
Number of legacy Aon and Hewitt UK pension plans merged into one										5
Original number of legacy Aon and Hewitt UK legacy pension plans										7
Number of legacy Aon and Hewitt UK pension plans post merger										1
Contributions made to defined benefit pension plans			$ 195				$ 259		$ 80

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Fair Value and Financial Instruments

9 Months Ended

Sep. 30, 2012

Fair Value and Financial Instruments

Fair Value and Financial Instruments

14. Fair Value and Financial Instruments

Accounting standards establish a three tier fair value hierarchy that prioritizes the inputs used in measuring fair values as follows:

· Level 1 - observable inputs such as quoted prices for identical assets in active markets;

· Level 2 - inputs other than quoted prices for identical assets in active markets, that are observable either directly or indirectly; and

· Level 3 - unobservable inputs in which there is little or no market data which requires the use of valuation techniques and the development of assumptions.

The following methods and assumptions are used to estimate the fair values of the Company's financial instruments:

Money market funds and highly liquid debt securities are carried at cost and amortized cost, respectively, as an approximation of fair value. Based on market convention, the Company considers cost a practical and expedient measure of fair value.

Cash, cash equivalents, and highly liquid debt instruments consist of cash and institutional short-term investment funds. The Company independently reviews the short-term investment funds to obtain reasonable assurance the fund net asset value is $1 per share.

Equity investments consist of domestic and international equity securities and exchange traded equity derivatives valued using the closing stock price on a national securities exchange. Over the counter equity derivatives are valued using observable inputs such as underlying prices of the equity security and volatility. The Company independently reviews the listing of Level 1 equity securities in the portfolio and agrees the closing stock prices to a national securities exchange, and on a sample basis, independently verifies the observable inputs for Level 2 equity derivatives and securities.

Fixed income investments consist of certain categories of bonds and derivatives. Corporate, government, and agency bonds are valued by pricing vendors who estimate fair value using recently executed transactions and proprietary models based on observable inputs, such as interest rate spreads, yield curves and credit risk. Asset-backed securities are valued by pricing vendors who estimate fair value using discounted cash flow models utilizing observable inputs based on trade and quote activity of securities with similar features. Fixed income derivatives are valued by pricing vendors using observable inputs such as interest rates and yield curves. The Company obtains a detailed understanding of the models, inputs, and assumptions used in developing prices provided by its vendors. This understanding includes discussions with valuation resources at the vendor. During these discussions, the Company uses a fair value measurement questionnaire, which is part of the Company's internal controls over financial reporting, to obtain the information necessary to assert the model, inputs and assumptions used comply with U.S. GAAP, including disclosure requirements. The Company also obtains observable inputs from the pricing vendor and independently verifies the observable inputs, as well as assesses assumptions used for reasonableness based on relevant market conditions and internal Company guidelines. If an assumption is deemed unreasonable, based on the Company's guidelines, it is then reviewed by a member of management and the fair value estimate provided by the vendor is adjusted, if deemed appropriate. These adjustments do not occur frequently and have not historically been material to the fair value estimates used in the Condensed Consolidated Financial Statements.

Pooled funds consist of various equity, fixed income, commodity, and real estate mutual fund type investment vehicles. Pooled investment funds fair value is estimated based on the proportionate share ownership in the underlying net assets of the investment, which is based on the fair value of the underlying securities that trade on a national securities exchange. Where possible, the Company independently reviews the listing securities in the portfolio and agrees the closing stock prices to a national securities exchange. The Company gains an understanding of the investment guidelines and valuation policies of the fund and discusses fund performance with pooled fund managers. The Company obtains audited fund manager financial statements, when available. If the pooled fund is designed to replicate a publicly traded index, the Company compares the performance of the fund to the index to assess the reasonableness of the fair value measurement.

Alternative investments consist of limited partnerships, private equity and hedge funds. Alternative investment fair value is generally estimated based on the proportionate share ownership in the underlying net assets of the investment as determined by the general partner or investment manager. The valuations are based on various factors depending on investment strategy, proprietary models, and specific financial data or projections. The Company obtains audited fund manager financial statements, when available. The Company obtains a detailed understanding of the models, inputs and assumptions used in developing prices provided by the investment managers (or appropriate party) through regular discussions. During these discussions with the investment managers, the Company uses a fair value measurement questionnaire, which is part of the Company's internal controls over financial reporting, to obtain the information necessary to assert the model, inputs and assumptions used comply with U.S. GAAP, including disclosure requirements. The Company also obtains observable inputs from the investment manager and independently verifies the observable inputs, as well as assesses assumptions used for reasonableness based on relevant market conditions and internal Company guidelines. If an assumption is deemed unreasonable, based on the Company's guidelines, it is then reviewed by a member of management and the fair value estimate provided by the vendor is adjusted, if deemed appropriate. These adjustments do not occur frequently and have not historically been material to the fair value estimates in the Condensed Consolidated Financial Statements.

Derivatives are carried at fair value, based upon industry standard valuation techniques that use, where possible, current market-based or independently sourced pricing inputs, such as interest rates, currency exchange rates, or implied volatilities.

Annuity contracts consist of insurance group annuity contracts purchased to match the pension benefit payment stream owed to certain selected plan participant demographics within a few major United Kingdom defined benefit plans. Annuity contracts are valued using a discounted cash flow model utilizing assumptions such as discount rate, mortality, and inflation. The Company independently verifies the observable inputs.

Real estate and REITs consist of publicly traded REITs and direct real estate investments. Level 1 REITs are valued using the closing stock price on a national securities exchange. The Level 3 values are based on the proportionate share of ownership in the underlying net asset value as determined by the investment manager. The Company independently reviews the listing of Level 1 REIT securities in the portfolio and agrees the closing stock prices to a national securities exchange. The Company gains an understanding of the investment guidelines and valuation policies of the Level 3 real estate funds and discusses performance with the fund managers. The Company obtains audited fund manager financial statements, when available. See the description of "Alternative Investments" for further detail on valuation procedures surrounding Level 3 REITs.

Guarantees are carried at fair value, which is based on discounted estimated cash flows using published historical cumulative default rates and discount rates commensurate with the underlying exposure.

Debt is carried at outstanding principal balance, less any unamortized discount or premium. Fair value is based on quoted market prices or estimates using discounted cash flow analyses based on current borrowing rates for similar types of borrowing arrangements.

The following tables present the categorization of the Company's assets and liabilities that are measured at fair value on a recurring basis at September30, 2012 and December31, 2011 (in millions):

			FairValueMeasurementsUsing
			QuotedPricesin		Significant		Significant
			ActiveMarkets		Other		Unobservable
	Balanceat		forIdentical		Observable		Inputs
	September30,2012		Assets(Level1)		Inputs(Level2)		(Level3)
Assets:
Money market funds and highly liquid debt securities (1)	$	2,612	$	2,587	$	25	$	-
Other investments
Fixed maturity securities
Corporate bonds	12		-		-		12
Government bonds	6		-		6		-
Derivatives
Interest rate contracts	16		-		16		-
Foreign exchange contracts	226		-		226		-
Liabilities:
Derivatives
Foreign exchange contracts	284		-		284		-

(1) Includes $2,587 million of money market funds and $25 million of highly liquid debt securities that are classified as Fiduciary assets, Short-term investments or Cash and cash equivalents in the Condensed Consolidated Statements of Financial Position, depending on their nature and initial maturity. See Note 8 "Investments" for additional information regarding the Company's investments.

			FairValueMeasurementsUsing
			QuotedPricesin		Significant		Significant
			ActiveMarkets		Other		Unobservable
	Balanceat		forIdentical		Observable		Inputs
	December31,2011		Assets(Level1)		Inputs(Level2)		(Level3)
Assets:
Money market funds and highly liquid debt securities(1)	$	2,428	$	2,403	$	25	$	-
Other investments
Fixed maturity securities
Corporate bonds	12		-		-		12
Government Bonds	3		-		3		-
Derivatives
Interest rate contracts	16		-		16		-
Foreign exchange contracts	141		-		141		-
Liabilities:
Derivatives
Foreign exchange contracts	189		-		189		-

(1) Includes $2,403 million of money market funds and $25 million of highly liquid debt securities that are classified as Fiduciary assets, Short-term investments or Cash and cash equivalents in the Condensed Consolidated Statements of Financial Position, depending on their nature and initial maturity. See Note 8 "Investments" for additional information regarding the Company's investments.

There were no transfers of assets or liabilities between fair value hierarchy levels during either the three or nine months ended September30, 2012 and 2011. There were no realized or unrealized gains or losses recognized in the Condensed Consolidated Statements of Income during either the three or nine months ended September30, 2012 and 2011, related to assets and liabilities measured at fair value using unobservable inputs.

The fair value of all long-term debt instruments is classified as Level 2. The following table discloses the Company's financial instruments where the carrying amounts and fair values differ (in millions):

	September30,2012				December31,2011
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value
Long-term debt	$	4,111	$	4,618	$	4,155	$	4,494

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Other (Expense) Income (Tables)

9 Months Ended

Sep. 30, 2012

Other (Expense) Income

Other (Expense) Income

	Threemonthsended September30,						Ninemonthsended September30,
(in millions)	2012			2011			2012			2011
Equity earnings	$	-		$	5		$	8		$	9
Realized gain on sale of investments	9			1			11			10
Foreign currency remeasurement (losses) gains	(24		)	24			(24		)	18
Hedging gains (losses)	8			(11		)	8			(13		)
Loss on extinguishment of debt	-			-			-			(19		)
Other	(2		)	1			-			1
	$	(9	)	$	20		$	3		$	6

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Shareholders' Equity (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended
	Apr. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Apr. 04, 2012	Dec. 31, 2011	Sep. 30, 2012 Continuing operations	Sep. 30, 2011 Continuing operations	Sep. 30, 2012 Continuing operations	Sep. 30, 2011 Continuing operations	Jan. 31, 2010 2010 - Share Repurchase Program	Mar. 31, 2012 2010 - Share Repurchase Program	Sep. 30, 2012 2010 - Share Repurchase Program	Apr. 30, 2012 2012 - Share Repurchase Program	Sep. 30, 2012 2012 - Share Repurchase Program	Sep. 30, 2012 2012 - Share Repurchase Program
Common Stock Programs
Treasury stock shares cancelled (in shares)	60.0
Impact of cancellation of treasury shares on ordinary shares	$ 60,000,000
Impact of cancellation of treasury shares on Retained earnings	2,400,000,000
Cost of treasury stock shares eliminated	2,500,000,000
Common stock, par value before redomestication (in dollars per share)	$ 1.00
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01		$ 0.01			$ 1.00
Impact of redomestication in ordinary shares	323,000,000
Impact of redomestication on additional paid-in-capital	323,000,000
Distributable reserves available amount						8,000,000,000
Share repurchase authorization limit												2,000,000,000			5,000,000,000
Number of shares repurchased (in shares)													2.1	12.7		5.4	12.7
Average price per share of shares purchased under share repurchase program (in dollars per share)													$ 48.32	$ 49.22		$ 51.37	$ 49.22
Cost of shares repurchased				625,000,000									100,000,000	625,000,000		275,000,000	625,000,000
Share repurchase, remaining authorization limit																	4,500,000,000
Cumulative number of shares purchased under share repurchase programs (in shares)													18.2
Cumulative value of shares purchased under share repurchase programs													913,000,000
Participating Securities
Income from continuing operations		$ 2,000,000	$ 3,000,000	$ 8,000,000	$ 11,000,000			$ 2,000,000	$ 3,000,000	$ 8,000,000	$ 11,000,000
Weighted average shares outstanding
Shares for basic earnings per share		327.3	332.6	330.6	336.7
Common stock equivalents (in shares)		3.7	4.3	3.8	5.1
Shares for diluted earnings per share		331.0	336.9	334.4	341.8
Number of participating securities (in shares)		4.5	5.2	4.7	5.5
Number of shares excluded from the calculation of diluted earnings per share		0.1	1.0	0.1	0.1

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Acquisitions and Dispositions (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 item	Sep. 30, 2011 item
Business Acquisition
Consideration	110	100
Intangible assets:
Goodwill	60	58
Other intangible assets	56	29
Intangible assets	116	87
Risk Solutions
Business Acquisition
Number of business acquired under business combination	4	2
HR Solutions
Business Acquisition
Number of business acquired under business combination	2	1

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Condensed Consolidated Statements of Financial Position (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Condensed Consolidated Statements of Financial Position
Common stock, nominal or par value (in dollars per share)	$ 0.01	$ 1.00
Common stock, Authorized shares	750	750
Common stock, issued shares	318.7	386.4
Treasury stock, shares	0	59.6

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Cash and Cash Equivalents

9 Months Ended

Sep. 30, 2012

Cash and Cash Equivalents.

Cash and Cash Equivalents

3. Cash and Cash Equivalents

Cash and cash equivalents include cash balances and all highly liquid investments with initial maturities of three months or less. Short-term investments include certificates of deposit, money market funds and highly liquid debt instruments purchased with initial maturities in excess of three months but less than one year and are carried at amortized cost, which approximates fair value.

The Company is required to hold £77 million of operating funds in the U.K. as required by the Financial Services Authority, which were included in Short-term investments. These operating funds, when translated to U.S. dollars, were $124 million and $120 million at September30, 2012 and December31, 2011, respectively. Cash and cash equivalents included restricted balances of $88 million and $71 million at September30, 2012 and December31, 2011 respectively.

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Fair Value and Financial Instruments (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Fair Value Money market funds and highly liquid debt securities Recurring	Dec. 31, 2011 Fair Value Money market funds and highly liquid debt securities Recurring	Sep. 30, 2012 Fair Value Money market funds Recurring	Dec. 31, 2011 Fair Value Money market funds Recurring	Sep. 30, 2012 Fair Value Highly liquid debt securities Recurring	Dec. 31, 2011 Fair Value Highly liquid debt securities Recurring	Sep. 30, 2012 Fair Value Corporate bonds Recurring	Dec. 31, 2011 Fair Value Corporate bonds Recurring	Sep. 30, 2012 Fair Value Government bonds. Recurring	Dec. 31, 2011 Fair Value Government bonds. Recurring	Sep. 30, 2012 Fair Value Interest rate contracts Recurring	Dec. 31, 2011 Fair Value Interest rate contracts Recurring	Sep. 30, 2012 Fair Value Foreign exchange contracts Recurring	Dec. 31, 2011 Fair Value Foreign exchange contracts Recurring	Sep. 30, 2012 Quoted Prices in Active Markets for Identical Assets (Level 1) Money market funds and highly liquid debt securities Recurring	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Money market funds and highly liquid debt securities Recurring	Sep. 30, 2012 Significant Other Observable Inputs (Level 2) Money market funds and highly liquid debt securities Recurring	Dec. 31, 2011 Significant Other Observable Inputs (Level 2) Money market funds and highly liquid debt securities Recurring	Sep. 30, 2012 Significant Other Observable Inputs (Level 2) Government bonds. Recurring	Dec. 31, 2011 Significant Other Observable Inputs (Level 2) Government bonds. Recurring	Sep. 30, 2012 Significant Other Observable Inputs (Level 2) Interest rate contracts Recurring	Dec. 31, 2011 Significant Other Observable Inputs (Level 2) Interest rate contracts Recurring	Sep. 30, 2012 Significant Other Observable Inputs (Level 2) Foreign exchange contracts Recurring	Dec. 31, 2011 Significant Other Observable Inputs (Level 2) Foreign exchange contracts Recurring	Sep. 30, 2012 Significant Unobservable Inputs (Level 3) Corporate bonds Recurring	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Corporate bonds Recurring
Fair Value and Financial Instruments
Net assets value (in dollar per share)	$ 1
Assets:
Money market funds and highly liquid debt securities		$ 2,612	$ 2,428	$ 2,587	$ 2,403	$ 25	$ 25									$ 2,587	$ 2,403	$ 25	$ 25
Other investments								12	12	6	3									6	3					12	12
Derivatives												16	16	226	141							16	16	226	141
Liabilities:
Derivatives														$ 284	$ 189									$ 284	$ 189

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Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2012

Acquisitions and Dispositions

Consideration transferred and preliminary value of intangible assets

	NinemonthsendedSeptember30,
(millions)	2012		2011
Consideration	$	110	$	100
Intangible assets:
Goodwill	$	60	$	58
Other intangible assets	56		29
	$	116	$	87

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Basis of Presentation (Details) (USD $)	1 Months Ended
	Apr. 30, 2012
Company Redomestication
Right to receive number of Class A Ordinary Share in redomestication	1
Nominal value of Class A Ordinary Share in redomestication (in dollars per share)	$ 0.01

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Derivatives and Hedging

9 Months Ended

Sep. 30, 2012

Derivatives and Hedging

Derivatives and Hedging

13. Derivatives and Hedging

The Company is exposed to market risks, including changes in foreign currency exchange rates and interest rates. To manage the risk related to these exposures, the Company enters into various derivative instruments that reduce these market risks by creating offsetting exposures. The Company does not enter into derivative transactions for trading or speculative purposes.

Foreign Exchange Risk Management

The Company is exposed to foreign exchange risk when it receives revenues, pays expenses, or enters into intercompany loans denominated in a currency that differs from its functional currency. The Company uses foreign exchange derivatives, typically forward contracts, options and cross currency swaps, to reduce its overall exposure to the effects of currency fluctuations on cash flows. These exposures are hedged, on average, for less than two years; however, in limited instances, the Company has hedged certain exposures up to five years in the future.

The Company also uses foreign exchange derivatives, typically forward contracts and options, to hedge its net investments in foreign operations for up to two years in the future.

The Company also uses foreign exchange derivatives, typically forward contracts and options, to manage the currency exposure of the Company's global liquidity profile for up to one year in the future. These derivatives are not accounted for as hedges, and changes in fair value are recorded each period in Other (expense) income in the Condensed Consolidated Statements of Income.

Interest Rate Risk Management

The Company holds variable-rate short-term brokerage and other operating deposits. The Company uses interest rate derivatives, typically swaps, to reduce its exposure to the effects of interest rate fluctuations on the forecasted interest receipts from these deposits for up to two years in the future.

Certain derivatives also give rise to credit risks from the possible non-performance by counterparties. The credit risk is generally limited to the fair value of those contracts that are favorable to the Company. The Company has limited its credit risk by using International Swaps and Derivatives Association ("ISDA") master agreements, collateral and credit support arrangements, entering into non-exchange-traded derivatives with highly-rated major financial institutions and by using exchange-traded instruments. The Company monitors the credit worthiness of, and exposure to, its counterparties. As of September30, 2012, all net derivative positions were free of credit risk contingent features. The Company has not received or pledged any collateral as of September30, 2012.

The notional and fair values of derivative instruments are as follows (in millions):

	NotionalAmount				DerivativeAssets (1)				DerivativeLiabilities (2)
	September30, 2012		December31, 2011		September30, 2012		December31, 2011		September30, 2012		December31, 2011
Derivatives accounted for as hedges:
Interest rate contracts	$	342	$	702	$	16	$	16	$	-	$	-
Foreign exchange contracts	1,224		1,297		224		140		283		188
Total	1,566		1,999		240		156		283		188
Derivatives not accounted for as hedges:
Foreign exchange contracts	187		246		2		1		1		1
Total	$	1,753	$	2,245	$	242	$	157	$	284	$	189

(1)Included within Other current assets or Other non-current assets

(2)Included within Other current liabilities or Other non-current liabilities

The amounts of derivative gains (losses) recognized in the Condensed Consolidated Financial Statements for the three and nine months ended September 30, 2012 and 2011 are as follows (in millions):

	ThreemonthsendedSeptember 30,						NinemonthsendedSeptember 30,
	2012			2011			2012			2011
Gain (Loss) recognized in Accumulated Other Comprehensive Loss:
Cash Flow Hedges:
Interest rate contracts (1)	$	-		$	1		$	-		$	(1	)
Foreign exchange contracts (2)	16			(10		)	(14		)	(31		)
Total	16			(9		)	(14		)	(32		)
Foreign Net Investment Hedges:
Foreign exchange contracts	$	3		$	13		$	4		$	(4	)
Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion):
Cash Flow Hedges:
Interest rate contracts (1)	$	-		$	-		$	-		$	1
Foreign exchange contracts (2)	(7		)	3			(23		)	(12		)
Total	(7		)	3			(23		)	(11		)
Foreign Net Investment Hedges:
Foreign exchange contracts	$	-		$	-		$	-		$	-

(1)Included within Fiduciary investment income and Interest expense

(2)Included within Other (expense) income and Interest expense

	ThreemonthsendedSeptember30,						NinemonthsendedSeptember30,
	AmountofGain(Loss) RecognizedinIncomeon Derivative(1)			AmountofGain(Loss) RecognizedinIncomeon RelatedHedgeItem(2)			AmountofGain(Loss) RecognizedinIncomeon Derivative(1)		AmountofGain(Loss) RecognizedinIncomeon RelatedHedgeItem(2)
	2012		2011	2012	2011		2012	2011	2012	2011
Fair value hedges:
Foreign exchange contracts	(3	)	2	3	(3	)	-	-	-	1

(1)Relates to fixed rate debt

(2)Included in Interest expense

It is estimated that approximately $18 million of pretax losses currently included within Accumulated other comprehensive loss will be reclassified into earnings in the next twelve months.

The amount of gain (loss) recognized in income on the ineffective portion of derivatives for the three and nine months ended September30, 2012 and 2011 was not material.

During the three and nine months ended September30, 2012, the Company recorded a gain of $6 million and $12 million, respectively, in Other (expense) income for foreign exchange derivatives not designated or qualifying as hedges. During the three and nine months ended September30, 2011, the Company recorded a loss of $9 million in each period, in Other (expense) income for foreign exchange derivatives not designated or qualifying as hedges.