10-Q

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

_____________________________________________ 

FORM 10-Q

_____________________________________________ 

(Mark One)

☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended September 30, 2022

OR

☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from to

____________________________________________ 

Marsh & McLennan Companies, Inc.

1166 Avenue of the Americas

New York, New York 10036

(212) 345-5000

_____________________________________________ 

Commission file number 1-5998

State of Incorporation: Delaware

I.R.S. Employer Identification No. 36-2668272

_____________________________________________ 

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading symbol(s)	Name of exchange on which registered
Common Stock, par value $1.00 per share	MMC	New York Stock Exchange
		Chicago Stock Exchange
		London Stock Exchange

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  ý    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ý    No  ¨

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

Large Accelerated Filer	☒	Accelerated Filer	☐
Non-Accelerated Filer	☐(Do not check if a smaller reporting company)	Smaller Reporting Company	☐
		Emerging Growth Company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     Yes  ☐   No  ý

As of October 17, 2022, there were outstanding 496,009,506 shares of common stock, par value $1.00 per share, of the registrant.

INFORMATION CONCERNING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains "forward-looking statements," as defined in the Private Securities Litigation Reform Act of 1995. These statements, which express management's current views concerning future events or results, use words like "anticipate," "assume," "believe," "continue," "estimate," "expect," "intend," "plan," "project" and similar terms, and future or conditional tense verbs like "could," "may," "might," "should," "will" and "would".

Forward-looking statements are subject to inherent risks and uncertainties that could cause actual results to differ materially from those expressed or implied in our forward-looking statements. Factors that could materially affect our future results include, among other things:

•the impact of geopolitical or macroeconomic conditions on us, our clients and the countries and industries in which we operate, including from conflicts such as the war in Ukraine, slower GDP growth or recession, capital markets volatility and inflation;

•the increasing prevalence of ransomware, supply chain and other forms of cyber attacks, and their potential to disrupt our operations and result in the disclosure of confidential client or company information;

•the impact from lawsuits or investigations arising from errors and omissions, breaches of fiduciary duty or other claims against us in our capacity as a broker or investment advisor, including claims related to our investment business’ ability to execute timely trades;

•the financial and operational impact of complying with laws and regulations, including domestic and international sanctions regimes, anti-corruption laws such as the U.S. Foreign Corrupt Practices Act, U.K. Anti Bribery Act and cybersecurity and data privacy regulations;

•our ability to attract, retain and develop industry leading talent;

•our ability to compete effectively and adapt to competitive pressures in each of our businesses, including from disintermediation as well as technological change, digital disruption and other types of innovation;

•our ability to manage potential conflicts of interest, including where our services to a client conflict, or are perceived to conflict, with the interests of another client or our own interests;

•the impact of changes in tax laws, guidance and interpretations, or disagreements with tax authorities; and

•the regulatory, contractual and reputational risks that arise based on insurance placement activities and insurer revenue streams.

The factors identified above are not exhaustive. Marsh McLennan and its subsidiaries (collectively, the "Company") operate in a dynamic business environment in which new risks emerge frequently. Accordingly, we caution readers not to place undue reliance on any forward-looking statements, which are based only on information currently available to us and speak only as of the dates on which they are made. The Company undertakes no obligation to update or revise any forward-looking statement to reflect events or circumstances arising after the date on which it is made.

Further information concerning Marsh McLennan and its businesses, including information about factors that could materially affect our results of operations and financial condition, is contained in the Company's filings with the Securities and Exchange Commission, including the "Risk Factors" section and the "Management’s Discussion and Analysis of Financial Condition and Results of Operations" section of this Quarterly Report on Form 10-Q and our most recently filed Annual Report on Form 10-K.

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TABLE OF CONTENTS

PART I. FINANCIAL INFORMATION		4
ITEM 1.	FINANCIAL STATEMENTS (UNAUDITED)	4
	CONSOLIDATED STATEMENTS OF INCOME	4
	CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	5
	CONSOLIDATED BALANCE SHEETS	6
	CONSOLIDATED STATEMENTS OF CASH FLOWS	8
	CONSOLIDATED STATEMENTS OF EQUITY	9
	NOTES TO CONSOLIDATED FINANCIAL STATEMENTS	10
ITEM 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS	35
	OF OPERATIONS
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	50
ITEM 4.	CONTROLS & PROCEDURES	51
PART II. OTHER INFORMATION		52
ITEM 1.	LEGAL PROCEEDINGS	52
ITEM 1A.	RISK FACTORS	52
ITEM 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS	52
ITEM 3.	DEFAULTS UPON SENIOR SECURITIES	52
ITEM 4.	MINE SAFETY DISCLOSURE	52
ITEM 5.	OTHER INFORMATION	52
ITEM 6.	EXHIBITS	52

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PART I.    FINANCIAL INFORMATION

Item 1.Financial Statements.

MARSH & McLENNAN COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2022		2021		2022		2021
Revenue	$	4,770	$	4,583	$	15,698	$	14,683
Expense:
Compensation and benefits	2,923		2,853		9,033		8,520
Other operating expenses	1,056		990		3,065		2,837
Operating expenses	3,979		3,843		12,098		11,357
Operating income	791		740		3,600		3,326
Other net benefit credits	57		69		178		211
Interest income	4		1		6		2
Interest expense	(118)		(107)		(342)		(335)
Investment (loss) income	(1)		13		27		43
Income before income taxes	733		716		3,469		3,247
Income tax expense	181		174		853		880
Net income before non-controlling interests	552		542		2,616		2,367
Less: Net income attributable to non-controlling interests	6		5		32		27
Net income attributable to the Company	$	546	$	537	$	2,584	$	2,340
Net income per share attributable to the Company:
- Basic	$	1.10	$	1.06	$	5.16	$	4.61
- Diluted	$	1.08	$	1.05	$	5.11	$	4.56
Average number of shares outstanding:
- Basic	498		506		501		508
- Diluted	503		513		506		513
Shares outstanding at September 30,	497		505		497		505

The accompanying notes are an integral part of these unaudited consolidated statements.

4

MARSH & McLENNAN COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Net income before non-controlling interests	$	552	$	542	$	2,616	$	2,367
Other comprehensive (loss) income, before tax:
Foreign currency translation adjustments	(895)		(346)		(1,928)		(413)
Gain related to pension/post-retirement plans	281		204		603		234
Other comprehensive loss, before tax	(614)		(142)		(1,325)		(179)
Income tax expense on other comprehensive loss	71		50		148		56
Other comprehensive loss, net of tax	(685)		(192)		(1,473)		(235)
Comprehensive (loss) income	(133)		350		1,143		2,132
Less: comprehensive income attributable to non-controlling interest	6		5		32		27
Comprehensive (loss) income attributable to the Company	$	(139)	$	345	$	1,111	$	2,105

The accompanying notes are an integral part of these unaudited consolidated statements.

5

MARSH & McLENNAN COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(In millions, except share data)	(Unaudited) September 30, 2022		December 31, 2021
ASSETS
Current assets:
Cash and cash equivalents	$	802	$	1,752
Receivables
Commissions and fees	5,312		5,093
Advanced premiums and claims	144		136
Other	527		523
	5,983		5,752
Less-allowance for credit losses	(164)		(166)
Net receivables	5,819		5,586
Other current assets	953		926
Total current assets	7,574		8,264
Goodwill	15,576		16,317
Other intangible assets	2,403		2,810
Fixed assets (net of accumulated depreciation and amortization of $1,650 at September 30, 2022 and $1,589 at December 31, 2021)	865		847
Pension related assets	2,074		2,270
Right of use assets	1,615		1,868
Deferred tax assets	533		551
Other assets	1,383		1,461
	$	32,023	$	34,388

 The accompanying notes are an integral part of these unaudited consolidated statements.

6

MARSH & McLENNAN COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS (Continued)

(In millions, except share data)	(Unaudited) September 30, 2022		December 31, 2021
LIABILITIES AND EQUITY
Current liabilities:
Short-term debt	$	967	$	17
Accounts payable and accrued liabilities	2,903		3,165
Accrued compensation and employee benefits	2,396		2,942
Current lease liabilities	298		332
Accrued income taxes	432		198
Dividends payable	296		—
Total current liabilities	7,292		6,654
Fiduciary liabilities	10,608		9,622
Less – cash and cash equivalents held in a fiduciary capacity	(10,608)		(9,622)
	—		—
Long-term debt	10,399		10,933
Pension, post-retirement and post-employment benefits	1,309		1,632
Long-term lease liabilities	1,620		1,880
Liabilities for errors and omissions	331		355
Other liabilities	1,281		1,712
Commitments and contingencies	—		—
Equity:
Preferred stock, $1 par value, authorized 6,000,000 shares, none issued	—		—
Common stock, $1 par value, authorized 1,600,000,000 shares, issued 560,641,640 shares at September 30, 2022 and December 31, 2021	561		561
Additional paid-in capital	1,111		1,112
Retained earnings	19,837		18,389
Accumulated other comprehensive loss	(6,048)		(4,575)
Non-controlling interests	226		213
	15,687		15,700
Less – treasury shares, at cost, 64,102,660 shares at September 30, 2022 and 57,105,619 shares at December 31, 2021	(5,896)		(4,478)
Total equity	9,791		11,222
	$	32,023	$	34,388

The accompanying notes are an integral part of these unaudited consolidated statements.

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MARSH & McLENNAN COMPANIES, INC. AND SUBSIDIARIES                        

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

For the Nine Months Ended September 30,
(In millions)	2022		2021
Operating cash flows:
Net income before non-controlling interests	$	2,616	$	2,367
Adjustments to reconcile net income provided by operations:
Depreciation and amortization of fixed assets and capitalized software	259		291
Amortization of intangible assets	258		278
Non-cash lease expense	223		241
Adjustments and payments related to contingent consideration assets and liabilities	—		(16)
Deconsolidation of Russian businesses	39		—
Net gain on investments	(27)		(43)
Net gain on disposition of assets	(112)		(37)
Share-based compensation expense	283		263
Changes in assets and liabilities:
Net receivables	(745)		(604)
Other assets	(14)		(276)
Accrued compensation and employee benefits	(451)		(20)
Provision for taxes, net of payments and refunds	156		196
Contributions to pension and other benefit plans in excess of current year credit	(306)		(282)
Other liabilities	28		(22)
Operating lease liabilities	(244)		(262)
Net cash provided by operations	1,963		2,074
Financing cash flows:
Purchase of treasury shares	(1,600)		(734)
Net proceeds from issuance of commercial paper	600		—
Repayments of debt	(14)		(512)
Shares withheld for taxes on vested units – treasury shares	(194)		(99)
Issuance of common stock from treasury shares	89		115
Payments of deferred and contingent consideration for acquisitions	(144)		(110)
Receipts of contingent consideration for dispositions	3		71
Distributions of non-controlling interests	(20)		(27)
Dividends paid	(840)		(750)
Change in fiduciary liabilities	2,148		1,919
Net cash provided by (used for) financing activities	28		(127)
Investing cash flows:
Capital expenditures	(367)		(268)
Purchases of long term investments	(19)		(28)
Sales of long term investments	84		30
Dispositions	138		84
Acquisitions, net of cash and cash held in a fiduciary capacity acquired	(213)		(384)
Other, net	14		(6)
Net cash used for investing activities	(363)		(572)
Effect of exchange rate changes on cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity	(1,592)		(243)
Increase in cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity	36		1,132
Cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity at beginning of period	11,374		10,674
Cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity at end of period	$	11,410	$	11,806

Reconciliation of cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity to the Consolidated Balance Sheets
Nine Months Ended September 30,	2022		2021
(In millions)
Cash and cash equivalents	$	802	$	1,398
Cash and cash equivalents held in a fiduciary capacity	10,608		10,408
Total cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity	$	11,410	$	11,806

The accompanying notes are an integral part of these unaudited consolidated statements.

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MARSH & McLENNAN COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EQUITY

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2022		2021		2022		2021
COMMON STOCK
Balance, beginning and end of period	$	561	$	561	$	561	$	561
ADDITIONAL PAID-IN CAPITAL
Balance, beginning of period	$	1,044	$	945	$	1,112	$	943
Change in accrued stock compensation costs	60		89		(80)		41
Issuance of shares under stock compensation plans and employee stock purchase plans	7		—		79		50
Balance, end of period	$	1,111	$	1,034	$	1,111	$	1,034
RETAINED EARNINGS
Balance, beginning of period	$	19,880	$	17,597	$	18,389	$	16,272
Net income attributable to the Company	546		537		2,584		2,340
Dividend equivalents declared	(3)		(2)		(10)		(8)
Dividends declared	(586)		(543)		(1,126)		(1,015)
Balance, end of period	$	19,837	$	17,589	$	19,837	$	17,589
ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
Balance, beginning of period	$	(5,363)	$	(5,153)	$	(4,575)	$	(5,110)
Other comprehensive (loss) income, net of tax	(685)		(192)		(1,473)		(235)
Balance, end of period	$	(6,048)	$	(5,345)	$	(6,048)	$	(5,345)
TREASURY SHARES
Balance, beginning of period	$	(5,429)	$	(3,842)	$	(4,478)	$	(3,562)
Issuance of shares under stock compensation plans and employee stock purchase plans	33		37		182		191
Purchase of treasury shares	(500)		(300)		(1,600)		(734)
Balance, end of period	$	(5,896)	$	(4,105)	$	(5,896)	$	(4,105)
NON-CONTROLLING INTERESTS
Balance, beginning of period	$	224	$	156	$	213	$	156
Net income attributable to non-controlling interests	6		5		32		27
Distributions and other changes	(4)		(7)		(19)		(29)
Balance, end of period	$	226	$	154	$	226	$	154
TOTAL EQUITY	$	9,791	$	9,888	$	9,791	$	9,888
Dividends declared per share	$	1.180	$	1.070	$	2.250	$	2.000

The accompanying notes are an integral part of these unaudited consolidated statements.

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MARSH & McLENNAN COMPANIES, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.     Nature of Operations

Marsh & McLennan Companies, Inc. (the "Company"), a global professional services firm, is organized based on the different services that it offers. Under this structure, the Company’s two business segments are Risk and Insurance Services and Consulting.

The Risk and Insurance Services segment ("RIS") provides risk management solutions (risk advice, risk transfer and risk control and mitigation) as well as insurance and reinsurance broking and services for businesses, public entities, insurance companies, associations, professional services organizations, and private clients. The Company conducts business in this segment through Marsh and Guy Carpenter. Marsh provides data-driven risk advisory services and solutions to commercial and consumer clients. Guy Carpenter develops advanced risk, reinsurance and capital strategies that help clients grow profitably and identify and capitalize on emerging opportunities.

The Company conducts business in its Consulting segment through Mercer and Oliver Wyman Group. Mercer delivers advice and solutions that help organizations create a dynamic world of work, shape retirement and investment outcomes, and unlock health and well being for a changing workforce. Oliver Wyman Group serves as critical strategic, economic and brand advisor to private sector and governmental clients.

Deconsolidation of Russia

On February 24, 2022, Russian forces launched a military invasion of Ukraine. In response, the United States, the European Union, United Kingdom and other governments have imposed significant economic sanctions on Russia, and Russia has responded with counter-sanctions. The war in Ukraine has disrupted international commerce and the global economy.

In the first quarter of 2022, the Company concluded that it did not meet the accounting criteria for control over its wholly-owned Russian businesses due to the evolving trade and economic sanctions, and recorded a loss of $52 million on the deconsolidation of the Russian businesses and other related charges.

In June 2022, the Company entered into a definitive agreement to exit its businesses in Russia and transfer ownership to local management pending regulatory approvals. Refer to Note 8, Acquisitions and Dispositions, for additional information on the deconsolidation of the Russian businesses.

The Company continues to monitor the ongoing situation and its potential impact on our business, financial condition, results of operations and cash flows.

Business Update related to COVID-19

For nearly three years, the COVID-19 pandemic has impacted businesses globally including in every geography in which the Company operates. Our businesses have remained resilient throughout the pandemic and demand for our advice and services remains strong. The ultimate extent of the impact of COVID-19 to the Company will depend on future developments that it is unable to predict.

2.     Principles of Consolidation and Other Matters

The Company prepared the consolidated financial statements included herein pursuant to the rules and regulations of the Securities and Exchange Commission. For interim filings, certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been omitted pursuant to such rules and regulations. The Company believes that the information and disclosures presented are adequate to make such information and disclosures not misleading. These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 (the "2021 Form 10-K").

The financial information contained herein reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair presentation of the Company’s consolidated financial statements as of and for the nine months ended September 30, 2022 and 2021.

Estimates: The preparation of the consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expense during the reporting period.

On an ongoing basis, the Company evaluates its estimates, judgments and methodologies. The estimates are based on historical experience and on various other assumptions that the Company believes are reasonable.

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Such matters include:

•estimates of revenue;

•impairment assessments and charges;

•recoverability of long-lived assets;

•liabilities for errors and omissions;

•deferred tax assets, uncertain tax positions and income tax expense;

•share-based and incentive compensation expense;

•the allowance for current expected credit losses on receivables;

•useful lives assigned to long-lived assets, and depreciation and amortization; and

•fair value estimates of contingent consideration receivable or payable related to acquisitions or dispositions.

The Company believes these estimates are reasonable based on information currently available at the time they are made. The Company also considered the potential impact of macroeconomic factors including inflation, the war in Ukraine and COVID-19 to its customer base in various industries and geographies. Insurance exposures subject to variable factors are subject to mid-term and end of term adjustments, as well as policy audits, which may reduce premiums and corresponding commissions. Estimates were updated based on internal and industry specific economic data. Actual results may differ from these estimates.

Cash and Cash Equivalents

Cash and cash equivalents primarily consist of certificates of deposit and time deposits, with original maturities of three months or less, and money market funds. The estimated fair value of the Company's cash and cash equivalents approximates their carrying value. The Company is required to maintain operating funds primarily related to regulatory requirements outside of the United States or as collateral under captive insurance arrangements. At September 30, 2022, the Company maintained $295 million compared to $303 million at December 31, 2021 related to these regulatory requirements.

Allowance for Credit Losses on Accounts Receivable

The Company’s policy for providing an allowance for credit losses on its accounts receivable is based on a combination of factors, including historical write-offs, aging of balances, and other qualitative and quantitative analyses. The charge related to expected credit losses was immaterial to the consolidated statements of income for the three and nine months ended September 30, 2022 and 2021, respectively.

Investments

The caption "Investment (loss) income" in the consolidated statements of income comprises realized and unrealized gains and losses from investments recognized in earnings. It includes, when applicable, other than temporary declines in the value of securities, mark-to-market increases or decreases in equity investments with readily determinable fair values and equity method gains or losses on the Company's investments in private equity funds.

The Company holds investments in certain private equity funds. Investments in private equity funds are accounted for in accordance with the equity method of accounting using a consistently applied three-month lag period adjusted for any known significant changes from the lag period to the reporting date of the Company. The underlying private equity funds follow investment company accounting, where investments within the fund are carried at fair value. Investment gains or losses for its proportionate share of the change in fair value of the funds are recorded in earnings. Investments accounted for in accordance with the equity method of accounting are included in "other assets" in the consolidated balance sheets.

The Company recorded a net investment loss of $1 million and investment income of $27 million for the three and nine months ended September 30, 2022, respectively, compared to investment income of $13 million and $43 million for the corresponding periods in the prior year. The decrease in 2022 reflects lower mark-to-market gains in the Company's private equity investments compared to the corresponding periods in the prior year. In the third quarter of 2022, the Company also recorded a net loss of $4 million from the sale of certain investments.

Income Taxes

The Company's effective tax rate for the three months ended September 30, 2022 was 24.6%, compared with 24.2% for the corresponding quarter of 2021. The effective tax rates for the nine months ended September 30, 2022 and 2021, were 24.6% and 27.1%, respectively.

The tax rates in both periods reflect the impact of discrete tax matters such as excess tax benefits related to share-based compensation, enacted tax legislation, changes in uncertain tax positions, deferred tax adjustments and

11

nontaxable adjustments related to contingent consideration for acquisitions. The rate in both periods also reflects tax benefits from planning that postponed the utilization of current year losses in the U.K. to a future year when the tax rate will be 25%.

The excess tax benefit related to share-based payments is the most significant discrete item for the three and nine months ended September 30, 2022, reducing the effective tax rate by 0.9% and 1.2%, respectively. The reduction for both the three and nine months ended September 30, 2021 was 0.9%.

The effective tax rate for the nine months ended September 30, 2021 reflects the charge related to re-measuring the Company’s U.K. deferred tax assets and liabilities upon the enactment of legislation increasing the U.K. corporate income tax rate from 19% to 25%, effective April 1, 2023. The Company recorded a net charge of $100 million in the second quarter of 2021, which reflected the re-measurement of the Company's U.K. deferred tax assets and liabilities upon enactment of the legislation. The re-measurement of the Company's U.K. deferred tax assets and liabilities was the most significant discrete item in the prior year, increasing the Company's effective tax rate by 3.1% for the nine month period ended September 30, 2021.

On August 16, 2022, the Inflation Reduction Act of 2022 ("IRA") was enacted into law. The Company is currently evaluating the provisions of the new legislation, the most significant of which are the corporate alternative minimum tax and the share repurchase tax. The Company does not expect the IRA to have a significant impact on its financial results of operations when it becomes effective on January 1, 2023.

The Company's tax rate reflects its income, statutory tax rates, and tax planning in the various jurisdictions in which it operates. Significant judgment is required in determining the annual effective tax rate and in evaluating uncertain tax positions.

Losses in one jurisdiction, generally, cannot offset earnings in another, and within certain jurisdictions profits and losses may not offset between entities. Consequently, losses in certain jurisdictions may require valuation allowances affecting the effective tax rate, depending on estimates of the realizability of associated deferred tax assets. The tax rate is also sensitive to changes in unrecognized tax benefits, including the impact of settled tax audits and expired statutes of limitations.

Changes in tax laws or tax rulings may have a significant impact on our effective tax rate. The Company reports a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in tax returns. The Company's gross unrecognized tax benefits were $107 million at September 30, 2022, and $94 million at December 31, 2021. It is reasonably possible that the total amount of unrecognized tax benefits will decrease between zero and approximately $48 million within the next twelve months due to settlements of audits and expirations of statutes of limitations.

Integration and Restructuring Charges

Severance and related costs are recognized based on amounts due under established severance plans or estimates of one-time benefits that will be provided. Typically, severance benefits are recognized when the impacted colleagues are notified of their expected termination and such termination is expected to occur within the legally required notification period. These costs are included in compensation and benefits in the consolidated statements of income.

Costs for real estate consolidation are recognized based on the type of cost, and the expected future use of the facility. For locations where the Company does not expect to sub-lease the property, the amortization of any Right-of-use ("ROU") asset is accelerated from the decision date to the cease use date. For locations where the Company expects to sub-lease the properties subsequent to its vacating the property, the ROU asset is reviewed for potential impairment at the earlier of the cease use date or the date a sub-lease is signed. To determine the amount of impairment, the fair value of the ROU asset is determined based on the present value of the estimated net cash flows related to the property. Contractual costs outside of the ROU asset are recognized based on the net present value of expected future cash outflows for which the Company will not receive any benefit. Such amounts are reliant on estimates of future sub-lease income to be received and future contractual costs to be incurred. These costs are included in other operating expenses in the consolidated statements of income.

Other costs related to integration and restructuring, such as moving, legal or consulting costs are recognized as incurred. These costs are included in other operating expenses in the consolidated statements of income.

3.     Revenue

The core principle of the revenue recognition guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.

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To achieve this principle, the entity applies the following steps: identify the contract(s) with the customer, identify the performance obligations in the contract(s), determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the entity satisfies a performance obligation. A performance obligation is satisfied either at a “point in time” or “over time” depending on the nature of the product or service provided, and the specific terms of the contract with customers.

Other revenue included in the consolidated statements of income that is not from contracts with customers is less than 2% of total revenue and is not presented as a separate line item.

The Company's revenue policies are provided in more detail in Note 2, Revenue, in the Form 2021 10-K.

The following table disaggregates components of the Company's revenue:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Marsh:
EMEA	$	589	$	600	$	2,176	$	2,233
Asia Pacific	312		281		1,015		902
Latin America	118		105		340		298
Total International	1,019		986		3,531		3,433
U.S./Canada	1,451		1,366		4,263		3,894
Total Marsh	2,470		2,352		7,794		7,327
Guy Carpenter	328		314		1,849		1,697
Subtotal	2,798		2,666		9,643		9,024
Fiduciary interest income	40		4		57		12
Total Risk and Insurance Services	$	2,838	$	2,670	$	9,700	$	9,036
Mercer:
Wealth	$	561	$	613	$	1,775	$	1,861
Health	451		449		1,562		1,398
Career	272		253		679		618
Total Mercer	1,284		1,315		4,016		3,877
Oliver Wyman Group	667		610		2,029		1,813
Total Consulting	$	1,951	$	1,925	$	6,045	$	5,690

The Company recognizes commission revenue for a significant portion of its brokerage arrangements at a point in time on the effective date of the underlying policy. Commission revenue is estimated using historical information about the risks to be covered over the policy period, some of which are dependent on variable factors such as number of employees covered, covered payroll, airline passenger miles flown, shipped tonnage of marine cargo and others.

The following table provides contract assets and contract liabilities information from contracts with customers:

(In millions)	September 30, 2022		December 31, 2021
Contract assets	$	370	$	290
Contract liabilities	$	783	$	776

The Company records accounts receivable when the right to consideration is unconditional, subject only to the passage of time. Contract assets primarily relate to quota share reinsurance brokerage and contingent insurer revenue. The Company does not have the right to bill and collect revenue for quota share brokerage until the underlying policies written by the ceding insurer attach to the treaty. Estimated contingent insurer revenue related to the achievement of volume or loss ratio metrics cannot be billed or collected until all related policy placements are completed and the contingency is resolved. Contract assets are included in other current assets in the Company's consolidated balance sheets. Contract liabilities primarily relate to the advance consideration received from customers. Contract liabilities are included in current liabilities in the Company's consolidated balance sheets. Revenue recognized in the three and nine months ended September 30, 2022 that was included in the contract liability balance at the beginning of each of those periods was $75 million and $529 million, respectively, compared to revenue recognized of $131 million and $511 million for the corresponding periods in the prior year.

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The amount of revenue recognized in the three and nine months ended September 30, 2022 from performance obligations satisfied in previous periods, mainly due to variable consideration from contracts with insurers, quota share business and consulting contracts previously considered constrained was $13 million and $74 million, respectively, and $6 million and $68 million for the corresponding periods in the prior year.

The Company applies the practical expedient and does not disclose the value of unsatisfied performance obligations for (1) contracts with original contract terms of one year or less and (2) contracts where the Company has the right to invoice for services performed. The revenue expected to be recognized in future periods during the non-cancellable term of existing contracts greater than one year that is related to performance obligations that are unsatisfied or partially satisfied at the end of the reporting period is approximately $234 million, primarily related to Mercer. The Company expects revenue in 2023, 2024, 2025, 2026 and 2027 and beyond of $98 million, $66 million, $39 million, $21 million and $10 million, respectively, related to these performance obligations.

4.     Fiduciary Assets and Liabilities

In its capacity as an insurance broker or agent, generally the Company collects premiums from insureds and after deducting its commissions, remits the premiums to the respective insurance underwriters. The Company also collects claims or refunds from underwriters on behalf of insureds. Unremitted insurance premiums and claims proceeds are held by the Company in a fiduciary capacity. The Company's fiduciary assets primarily include bank or short term time deposits and liquid money market funds, and are classified as cash and cash equivalents. Risk and Insurance Services revenue includes interest on fiduciary funds of $40 million and $57 million for the three and nine months ended September 30, 2022, respectively, and $4 million and $12 million for the three and nine months ended September 30, 2021, respectively. Since cash and cash equivalents held in a fiduciary capacity are not available for corporate use, they are shown in the consolidated balance sheets as an offset to fiduciary liabilities.

Net uncollected premiums and claims and the related payables amounted to $12.5 billion at September 30, 2022, and $13.0 billion at December 31, 2021. The Company is not a principal to the contracts under which the right to receive premiums or the right to receive reimbursement of insured losses arises. Accordingly, net uncollected premiums and claims and the related payables are not assets and liabilities of the Company and are not included in the accompanying consolidated balance sheets.

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

The Company, through its Mercer subsidiary, manages assets in trusts or funds for which Mercer’s management or trustee fee is not considered a variable interest, since the fees are commensurate with the level of effort required to provide those services. Mercer is not the primary beneficiary of these trusts or funds. Mercer’s maximum exposure to loss of its interests is, therefore, limited to collection of its fees.

5.    Per Share Data

Basic net income per share attributable to the Company is calculated by dividing the after-tax income attributable to the Company by the weighted average number of outstanding shares of the Company’s common stock.

Diluted net income per share attributable to the Company is calculated by dividing the after-tax income attributable to the Company by the weighted average number of outstanding shares of the Company’s common stock, which have been adjusted for the dilutive effect of potentially issuable common shares.

Basic and Diluted EPS Calculation	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2022		2021		2022		2021
Net income before non-controlling interests	$	552	$	542	$	2,616	$	2,367
Less: Net income attributable to non-controlling interests	6		5		32		27
Net income attributable to the Company	$	546	$	537	$	2,584	$	2,340
Basic weighted average common shares outstanding	498		506		501		508
Dilutive effect of potentially issuable common shares	5		7		5		5
Diluted weighted average common shares outstanding	503		513		506		513
Average stock price used to calculate common stock equivalents	$	160.14	$	151.22	$	159.35	$	133.41

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6.    Supplemental Disclosures to the Consolidated Statements of Cash Flows

The following table provides additional information concerning acquisitions, interest and income taxes paid for the nine month periods ended September 30, 2022 and 2021.

(In millions)	2022		2021
Assets acquired, excluding cash, and cash and cash equivalents held in a fiduciary capacity	$	236	$	601
Acquisition-related deposit	24		—
Fiduciary liabilities assumed	(2)		(17)
Liabilities assumed	(28)		(59)
Contingent/deferred purchase consideration	(17)		(141)
Net cash outflow for acquisitions	$	213	$	384

(In millions)	2022		2021
Interest paid	$	388	$	407
Income taxes paid, net of refunds	$	697	$	686

The classification of contingent consideration in the consolidated statements of cash flows is dependent upon whether the receipt, payment or adjustment was part of the initial liability established on the acquisition date (financing) or an adjustment to the acquisition date liability (operating).

The following amounts are included in the consolidated statements of cash flows as operating and financing activities:

For the Nine Months Ended September 30,
(In millions)	2022		2021
Operating:
Contingent consideration payments for prior year acquisitions	$	(38)	$	(46)
Receipt of contingent consideration for dispositions	—		19
Acquisition/disposition related net charges (credits) for adjustments	38		11
Adjustments and payments related to contingent consideration	$	—	$	(16)
Financing:
Contingent consideration for prior year acquisitions	$	(28)	$	(26)
Deferred consideration related to prior year acquisitions	(116)		(84)
Payments of deferred and contingent consideration for acquisitions	$	(144)	$	(110)
Receipt of contingent consideration for dispositions	$	3	$	71

The Company had non-cash issuances of common stock under its share-based payment plan of $366 million and $225 million for the nine months ended September 30, 2022 and 2021, respectively. The Company recorded share-based compensation expense related to restricted stock units, performance stock units and stock options of $89 million and $283 million for the three and nine months ended September 30, 2022, respectively, and $87 million and $263 million for the three and nine months ended September 30, 2021, respectively.

Statement of Cash Flows Reclassifications

In the first quarter of 2022, the Company refined the statements of cash flows presentation to combine and reclassify certain line items within the operating cash flows section. In the third quarter, the Company further refined the statements of cash flows presentation to separately present purchases and sales of long term investments within the investing cash flows section. The prior year presentation was conformed to the current presentation with no impact on either operating or investing cash flows.

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7.    Other Comprehensive Income (Loss)

The changes, net of tax, in the balances of each component of Accumulated Other Comprehensive Income ("AOCI") for the three and nine months ended September 30, 2022 and 2021, including amounts reclassified out of AOCI, are as follows:

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of July 1, 2022	$	(2,957)	$	(2,406)	$	(5,363)
Other comprehensive income (loss) before reclassifications	182		(895)		(713)
Amounts reclassified from accumulated other comprehensive income	28		—		28
Net current period other comprehensive income (loss)	210		(895)		(685)
Balance as of September 30, 2022	$	(2,747)	$	(3,301)	$	(6,048)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of July 1, 2021	$	(4,102)	$	(1,051)	$	(5,153)
Other comprehensive income (loss) before reclassifications	115		(346)		(231)
Amounts reclassified from accumulated other comprehensive income	39		—		39
Net current period other comprehensive income (loss)	154		(346)		(192)
Balance as of September 30, 2021	$	(3,948)	$	(1,397)	$	(5,345)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of December 31, 2021	$	(3,202)	$	(1,373)	$	(4,575)
Other comprehensive income (loss) before reclassifications	371		(1,928)		(1,557)
Amounts reclassified from accumulated other comprehensive income	84		—		84
Net current period other comprehensive income (loss)	455		(1,928)		(1,473)
Balance as of September 30, 2022	$	(2,747)	$	(3,301)	$	(6,048)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of December 31, 2020	$	(4,126)	$	(984)	$	(5,110)
Other comprehensive income (loss) before reclassifications	63		(413)		(350)
Amounts reclassified from accumulated other comprehensive income	115		—		115
Net current period other comprehensive income (loss)	178		(413)		(235)
Balance as of September 30, 2021	$	(3,948)	$	(1,397)	$	(5,345)

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The components of other comprehensive (loss) income for the three and nine months ended September 30, 2022 and 2021 are as follows:

Three Months Ended September 30,	2022						2021
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	(895)	$	—	$	(895)	$	(346)	$	—	$	(346)
Pension/post-retirement plans:
Amortization of losses included in net periodic pension cost:
Net actuarial losses (a)	37		9		28		52		13		39
Subtotal	37		9		28		52		13		39
Foreign currency translation adjustments	247		63		184		88		21		67
Effect of remeasurement	(2)		—		(2)		64		16		48
Other adjustments	(1)		(1)		—		—		—		—
Pension/post-retirement plans gains	281		71		210		204		50		154
Other comprehensive (loss) income	$	(614)	$	71	$	(685)	$	(142)	$	50	$	(192)
(a) Included in other net benefit credits in the consolidated statements of income. Income tax expense on net actuarial losses are included in income tax expense.

Nine Months Ended September 30,	2022						2021
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	(1,928)	$	—	$	(1,928)	$	(413)	$	—	$	(413)
Pension/post-retirement plans:
Amortization of (gains) losses included in net periodic pension cost:
Prior service credits (a)	(1)		—		(1)		(1)		—		(1)
Net actuarial losses (a)	114		29		85		156		40		116
Subtotal	113		29		84		155		40		115
Foreign currency translation adjustments	499		123		376		7		1		6
Effect of remeasurement	8		1		7		77		17		60
Effect of settlement	2		—		2		2		—		2
Other adjustments	(19)		(5)		(14)		(7)		(2)		(5)
Pension/post-retirement plans gains	603		148		455		234		56		178
Other comprehensive (loss) income	$	(1,325)	$	148	$	(1,473)	$	(179)	$	56	$	(235)
(a) Included in other net benefit credits in the consolidated statements of income. Income tax expense on net actuarial losses are included in income tax expense.

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8.     Acquisitions and Dispositions

The Company’s acquisitions have been accounted for as business combinations. Net assets and results of operations are included in the Company’s consolidated financial statements commencing at the respective purchase closing dates. In connection with acquisitions, the Company records the estimated values of the net tangible assets and the identifiable intangible assets purchased, which typically consist of customer relationships, developed technology, trademarks and non-compete agreements. The valuation of purchased intangible assets involves significant estimates and assumptions. The Company estimates the fair value of purchased intangible assets, primarily using the income approach, by determining the present value of future cash flows over the remaining economic life of the respective assets. The significant estimates and assumptions used in this approach include the determination of the discount rate, economic life, future revenue growth rates, expected account attrition rates and earnings margins. Refinement and completion of final valuation of net assets acquired could affect the carrying value of tangible assets, goodwill and identifiable intangible assets.

The Risk and Insurance Services segment completed eight acquisitions during the nine months ended September 30, 2022:

•January – Marsh McLennan Agency ("MMA") acquired Heil & Kay Insurance Agency Inc., an Illinois-based full-service broker providing business insurance, employee health benefits services and personal lines insurance.

•April – Marsh acquired the business of Regional Treaty Services Corporation, a Rhode Island-based managing general underwriter, which manages reinsurance facilities for small to midsize U.S.-based insurers primarily writing personal lines, small agriculture, and main street commercial business.

•June – MMA acquired Clark Insurance, a Maine-based, full-service broker providing business insurance, employee health and benefits and private client services to businesses and individuals across the region.

•July – MMA acquired CS Insurance Strategies, Inc., an Illinois-based full-service broker providing employee health and benefits, business insurance, and risk management consulting services to organizations of all sizes across the U.S. and Suchanek Partners LLC, an Ohio-based employee benefits insurance broker.

•August – Marsh acquired Best Insurance Co. Ltd, a Japan-based insurance broker that provides affinity type schemes, general and personal lines insurance.

•September – MMA acquired Steinberg & Associates, Inc., a South Carolina-based insurance broker that primarily offers employee health benefit services to group clients and Leykell, Inc., a Texas-based full-service broker that provides specialty insurance focused on trade credit.

The Consulting segment completed three acquisitions during the nine months ended September 30, 2022:

•February – Oliver Wyman acquired Azure Consulting, an Australia-based management consulting firm with expertise in strategy development, organizational design and operations in the industrials, energy and natural resources sectors.

•March – Mercer acquired GeFi Assurances, a France-based brokerage and consulting firm specializing in collective corporate social protection.

•September – Oliver Wyman acquired Booz Allen Hamilton's strategy consulting business serving the Middle East and North Africa.

Total purchase consideration for acquisitions made during the nine months ended September 30, 2022 was $227 million, which consisted of cash paid of $210 million and deferred purchase consideration and estimated contingent consideration of $17 million. Contingent consideration arrangements are based primarily on earnings before interest, tax, depreciation and amortization ("EBITDA") or revenue targets over a period of two to four years. During the nine months ended September 30, 2022, the Company also paid $116 million of deferred purchase consideration and $66 million of contingent consideration related to acquisitions made in prior years. Estimated fair values of assets acquired and liabilities assumed are subject to adjustment until purchase accounting is finalized.

The following table presents the preliminary allocation of purchase consideration to the assets acquired and liabilities assumed during 2022, based on the estimated fair values for the acquisitions as of their respective acquisition dates:

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Acquisitions through September 30, 2022
(In millions)
Cash	$	210
Estimated fair value of deferred/contingent consideration	17
Total consideration	$	227
Allocation of purchase price:
Cash and cash equivalents	$	19
Cash and cash equivalents held in a fiduciary capacity	2
Net receivables	12
Other current assets	1
Goodwill	139
Other intangible assets	82
Fixed assets, net	2
Total assets acquired	257
Current liabilities	25
Fiduciary liabilities	2
Other liabilities	3
Total liabilities assumed	30
Net assets acquired	$	227

The purchase price allocation for assets acquired and liabilities assumed is based on estimates that are preliminary in nature and subject to adjustments, which could be material. Any necessary adjustments must be finalized during the measurement period, which for a particular asset, liability, or non-controlling interest ends once the acquirer determines that either (1) the necessary information has been obtained or (2) the information is not available. However, the measurement period for all items is limited to one year from the acquisition date.

Items subject to change include:

•amounts of intangible assets, fixed assets, capitalized software assets and right-of-use assets, subject to finalization of valuation efforts;

•amounts for contingencies, pending the finalization of the Company’s assessment of the portfolio of contingencies;

•amounts for deferred tax assets and liabilities, pending the finalization of valuations of the assets acquired, liabilities assumed and associated goodwill discussed below; and

•amounts for income tax assets, receivables and liabilities, pending the filing of the acquired companies' pre-acquisition income tax returns and receipt of information from taxing authorities which may change certain estimates and assumptions used.

The estimation of fair value requires numerous judgments, assumptions and estimates about future events and uncertainties, which could materially impact these values, and the related amortization, where applicable, in the Company’s results of operations.

The following table provides information about intangible assets acquired during 2022:

Intangible assets through September 30, 2022 (In millions)	Amount		Weighted Average Amortization Period
Client relationships	$	78	12.0 years
Other	4		4.5 years
Total intangibles	$	82

The consolidated statements of income include the results of operations of acquired companies since their respective acquisition dates. The consolidated statements of income for the three and nine month periods ended September 30, 2022, include revenue of approximately $16 million and $22 million, respectively, and operating loss of $1 million for the three and nine month periods ended September 30, 2022, for acquisitions made in 2022. The consolidated statements of income for the three and nine month periods ended September 30, 2021 include

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revenue of approximately $38 million and $73 million, respectively, and operating income of $3 million and $4 million, respectively, for acquisitions made in 2021.

Dispositions

In April 2022, Mercer sold its U.S. affinity business that provided insurance marketing, brokerage and administration to association and affinity groups for cash proceeds of approximately $140 million and recorded a net gain of $112 million which is included in revenue in the consolidated statements of income.

In addition, during the first nine months of 2022, the Company sold certain businesses in Brazil and the U.K. for cash proceeds of approximately $7 million.

Prior year acquisitions

The Risk and Insurance Services segment completed eight acquisitions during 2021:

•April – MMA acquired PayneWest Insurance, Inc., a Montana-based full-service broker providing business insurance, surety, employee benefits and personal insurance services to companies and individuals, and The Pryor Group, LLC, a Texas-based full-service broker providing business insurance with a specialty in quick service restaurants and the personal lines of franchise owners.

•September – MMA acquired Vaaler Insurance, Inc., a North Dakota-based insurance broker providing business insurance, employee health and benefits, and personal lines solutions, with specialized expertise in the construction, education, and healthcare industries.

•November – MMA acquired Pelnik Insurance, a North Carolina-based full-service broker providing business insurance, employee health and benefits, and private client services to midsize businesses and individuals throughout the Mid-Atlantic, Southwest Truck Insurance Agency, Inc., a Texas-based broker providing business insurance for the trucking industry, serving clients in the U.S., and Mexico and InSource Insurance Group LLC, a Texas-based full-service broker providing business insurance, employee health and benefits, private client and surety services to the oil and gas, construction, manufacturing, and transportation industries.

•December – Marsh acquired Services Assurance Monétique ("SAM"), a France-based affinity insurance broker specializing in bank and retail insurance markets and increased its ownership interest in Marsh India Insurance Broker Private Limited ("Marsh India") from 49% to 92%.

The Consulting segment completed one acquisition during 2021:

•November – Oliver Wyman Group acquired Huron Consulting Group’s life sciences strategy consulting practice in the U.S. and the U.K., which assists clients in addressing their most important commercial strategy, marketing, pricing, market access and research and development challenges.

Total purchase consideration for acquisitions made during the nine months ended September 30, 2021 was approximately $546 million, which consisted of cash paid of $405 million and deferred purchase and estimated contingent consideration of $141 million. Contingent consideration arrangements are based primarily on EBITDA or revenue targets over a period of two to four years. For the first nine months of 2021, the Company also paid $84 million of deferred purchase consideration and $72 million of contingent consideration related to acquisitions made in prior years. Estimated fair values of assets acquired and liabilities assumed are subject to adjustment when purchase accounting is finalized.

Prior year dispositions

During the first nine months of 2021, the Company sold certain businesses in the U.S. and the U.K. for cash proceeds of approximately $84 million and recognized a net gain of approximately $50 million, primarily related to the commercial networks business in the U.K. that provided broking and back-office solutions for small independent brokers.

Deconsolidation of Russia

In the first quarter of 2022, the Company concluded that it does not meet the accounting criteria for control over its wholly-owned Russian subsidiaries due to the evolving trade and economic sanctions against Russia and the related Russian counter sanctions. These sanctions included restrictions on payments to and from Russian companies and reduced currency access through official exchange markets that have significantly impacted the Company's ability to effectively manage and operate its Russian businesses.

As a result, the Company deconsolidated its Russian businesses effective as of the end of the first quarter, and recorded a loss of $39 million included in revenue in the consolidated statements of income. The loss consisted of

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the reclassification of cumulative translation losses from accumulated other comprehensive income and a charge for the write-off of the Russia businesses' net assets.

In June 2022, as previously announced in the first quarter, the Company entered into a definitive agreement to exit its businesses in Russia and transfer ownership to local management pending regulatory approvals.

Pro-Forma Information

The following unaudited pro-forma financial data gives effect to the acquisitions made by the Company during 2022 and 2021. In accordance with accounting guidance related to pro-forma disclosures, the information presented for acquisitions made in 2022 is as if they occurred on January 1, 2021, and reflects acquisitions made in 2021, as if they occurred on January 1, 2020. The unaudited pro-forma information includes the effects of amortization of acquired intangibles in all years. The unaudited pro-forma financial data is presented for illustrative purposes only and is not necessarily indicative of the operating results that would have been achieved if such acquisitions had occurred on the dates indicated, nor is it necessarily indicative of future consolidated results.

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2022		2021		2022		2021
Revenue	$	4,779	$	4,652	$	15,748	$	14,912
Net income attributable to the Company	$	548	$	543	$	2,594	$	2,358
Basic net income per share attributable to the Company	$	1.10	$	1.07	$	5.18	$	4.65
Diluted net income per share attributable to the Company	$	1.09	$	1.06	$	5.12	$	4.59

9.    Goodwill and Other Intangibles

The Company is required to assess goodwill and any indefinite-lived intangible assets for impairment annually, or more frequently if circumstances indicate impairment may have occurred. The Company performs the annual impairment assessment for each of its reporting units during the third quarter of each year. In accordance with applicable accounting guidance, a company can assess qualitative factors to determine whether it is necessary to perform a quantitative goodwill impairment test. Alternatively, the Company may elect to proceed directly to the quantitative goodwill impairment test. In the third quarter of 2022, the Company completed a qualitative impairment assessment and concluded that goodwill was not impaired. As part of its assessment, the Company considered numerous factors, including:

•that the fair value of each reporting unit exceeds its carrying value by a substantial margin based on its most recent quantitative assessment in 2019;

•whether significant acquisitions or dispositions occurred which might alter the fair value of its reporting units;

•macroeconomic conditions and their potential impact on reporting unit fair values;

•actual performance compared with budget and prior projections used in its estimation of reporting unit fair values;

•industry and market conditions; and

•the year-over-year change in the Company’s share price.

Other intangible assets that are not deemed to have an indefinite life are amortized over their estimated lives and assessed for impairment upon the occurrence of certain triggering events in accordance with applicable accounting literature. Based on its assessment, the Company concluded that other intangible assets were not impaired. The Company does not have any indefinite lived intangible assets.

Changes in the carrying amount of goodwill are as follows:

(In millions)	2022		2021
Balance as of January 1,	$	16,317	$	15,517
Goodwill acquired	139		374
Other adjustments(a)	(880)		(243)
Balance at September 30,	$	15,576	$	15,648

(a) Primarily reflects the impact of foreign exchange.

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The goodwill arising from acquisitions in 2022 and 2021 consists largely of the synergies and economies of scale expected from combining the operations of the Company and the acquired entities and the trained and assembled workforce acquired.

The goodwill acquired in 2022 included approximately $92 million and $25 million in the Risk and Insurance Services and Consulting segments, respectively, which is deductible for tax purposes.

Goodwill allocable to the Company’s reportable segments at September 30, 2022 is as follows: Risk and Insurance Services, $12.0 billion and Consulting, $3.6 billion.

The gross cost and accumulated amortization of identified intangible assets at September 30, 2022 and December 31, 2021 are as follows:

	September 30, 2022						December 31, 2021
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client relationships	$	3,759	$	1,407	$	2,352	$	4,066	$	1,334	$	2,732
Other (a)	340		289		51		365		287		78
Amortized intangibles	$	4,099	$	1,696	$	2,403	$	4,431	$	1,621	$	2,810

(a) Primarily reflects non-compete agreements, trade names and developed technology.

Aggregate amortization expense was $84 million and $258 million for the three and nine months ended September 30, 2022, compared to $89 million and $278 million for the corresponding periods in the prior year. The estimated future aggregate amortization expense is as follows:

For the Years Ending December 31,
(In millions)	Estimated Expense
2022 (excludes amortization through September 30, 2022)	$	86
2023	301
2024	283
2025	252
2026	234
Subsequent years	1,247
Total future amortization	$	2,403

10.     Fair Value Measurements

Fair Value Hierarchy

The Company has categorized its assets and liabilities that are valued at fair value on a recurring basis into a three-level fair value hierarchy as defined by the FASB. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets and liabilities (Level 1) and lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy, for disclosure purposes, is determined based on the lowest level input that is significant to the fair value measurement. Assets and liabilities recorded in the consolidated balance sheets at fair value are categorized based on the inputs in the valuation techniques as follows:

Level 1.Assets and liabilities whose values are based on unadjusted quoted prices for identical assets or liabilities in an active market (examples include active exchange-traded equity securities and exchange-traded money market mutual funds).

Assets and liabilities measured using Level 1 inputs include exchange-traded equity securities, exchange-traded mutual funds and money market funds.

Level 2.Assets and liabilities whose values are based on the following:

a)quoted prices for similar assets or liabilities in active markets;

b)quoted prices for identical or similar assets or liabilities in non-active markets (examples include corporate and municipal bonds, which trade infrequently);

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c)pricing models whose inputs are observable for substantially the full term of the asset or liability (examples include most over-the-counter derivatives, including interest rate and currency swaps); and

d)pricing models whose inputs are derived principally from or corroborated by observable market data through correlation or other means for substantially the full asset or liability (for example, certain mortgage loans).

Assets and liabilities using Level 2 inputs are related to an equity security.

Level 3.Assets and liabilities whose values are based on prices, or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the asset or liability.

Assets and liabilities measured using Level 3 inputs relate to assets and liabilities for contingent purchase consideration.

Valuation Techniques

Equity Securities, Money Market Mutual Funds and Mutual Funds – Level 1

Investments for which market quotations are readily available are valued at the sale price on their principal exchange or, for certain markets, official closing bid price. Money market funds are valued at a readily determinable price.

Contingent Purchase Consideration Assets and Liabilities – Level 3

Purchase consideration for some acquisitions and dispositions made by the Company include contingent consideration arrangements. Contingent consideration arrangements are based primarily on EBITDA or revenue targets over a period of two to four years. The fair value of the contingent purchase consideration asset and liability is estimated as the present value of future cash flows to be paid, based on projections of revenue and earnings and related targets of the acquired and disposed entities.

The following fair value hierarchy table presents information about the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2022 and December 31, 2021:

	Identical Assets (Level 1)				Observable Inputs (Level 2)				Unobservable Inputs (Level 3)				Total
(In millions)	09/30/22		12/31/21		09/30/22		12/31/21		09/30/22		12/31/21		09/30/22		12/31/21
Assets:
Financial instruments owned:
Exchange traded equity securities (a)	$	4	$	61	$	—	$	—	$	—	$	—	$	4	$	61
Mutual funds (a)	153		192		—		—		—		—		153		192
Money market funds (b)	89		425		—		—		—		—		89		425
Other equity investment (a)	—		—		—		8		—		—		—		8
Contingent purchase consideration assets (c)	—		—		—		—		2		5		2		5
Total assets measured at fair value	$	246	$	678	$	—	$	8	$	2	$	5	$	248	$	691
Fiduciary Assets:
U.S. treasury bills (d)	$	—	$	55	$	—	$	—	$	—	$	—	$	—	$	55
Money market funds	126		527		—		—		—		—		126		527
Total fiduciary assets measured at fair value	$	126	$	582	$	—	$	—	$	—	$	—	$	126	$	582
Liabilities:
Contingent purchase consideration liability (e)	$	—	$	—	$	—	$	—	$	328	$	352	$	328	$	352
Total liabilities measured at fair value	$	—	$	—	$	—	$	—	$	328	$	352	$	328	$	352

(a) Included in other assets in the consolidated balance sheets.

(b) Included in cash and cash equivalents in the consolidated balance sheets.

(c) Included in other receivables in the consolidated balance sheets.

(d) Maturity dates of three months or less.

(e) Included in accounts payable and accrued liabilities and other liabilities in the consolidated balance sheets.

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The Level 3 assets in the table reflect contingent purchase consideration from the sale of businesses. The change in the contingent purchase consideration assets from December 31, 2021 is driven by cash receipts of approximately $3 million.

During the nine months ended September 30, 2022, there were no assets or liabilities that were transferred between levels.

The following table sets forth a summary of the changes in fair value of the Company’s Level 3 liabilities for the three and nine months ended September 30, 2022 and 2021:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Balance at beginning of period	$	345	$	340	$	352	$	243
Net additions	4		1		4		99
Payments	(32)		(54)		(66)		(72)
Revaluation impact	11		18		38		35
Other (a)	—		(2)		—		(2)
Balance at September 30,	$	328	$	303	$	328	$	303

(a) Primarily reflects the impact of foreign exchange.

Long-Term Investments

The Company holds investments in public and private companies as well as certain private equity investments that are accounted for using the equity method of accounting. The carrying value of these investments was $222 million and $207 million at September 30, 2022 and December 31, 2021, respectively.

Investments in Public and Private Companies

The Company has investments in private insurance and consulting companies with a carrying value of $57 million and $58 million at September 30, 2022 and December 31, 2021, respectively. These investments are accounted for using the equity method of accounting, the results of which are included in revenue in the consolidated statements of income and the carrying value of which is included in other assets in the consolidated balance sheets. The Company records its share of income or loss on its equity method investments, some of which are on a one quarter lag basis. In December 2021, the Company increased its ownership in Marsh India from 49% to 92%. Prior to the increase in ownership, the Company accounted for the investment under the equity method of accounting.

Private Equity Investments

The Company's investments in private equity funds were $165 million and $149 million at September 30, 2022 and December 31, 2021, respectively. The carrying values of these private equity investments approximate fair value. The underlying private equity funds follow investment company accounting, where investments within the fund are carried at fair value. The Company records in earnings its proportionate share of the change in fair value of the funds on the investment income line in the consolidated statements of income. These investments are included in other assets in the consolidated balance sheets. The Company recorded net investment gains of $3 million and $23 million for the three and nine months ended September 30, 2022, respectively, and net investment gains of $13 million and $40 million from these investments for the corresponding periods in 2021.

Other Investments

At September 30, 2022 and December 31, 2021, the Company held equity investments with readily determinable market values of $17 million and $75 million, respectively. The Company recorded mark-to-market investment gains on these investments of $11 million and $3 million in the nine months ended September 30, 2022 and 2021, respectively.

The Company also held investments without readily determinable market values of $38 million and $36 million at September 30, 2022 and December 31, 2021, respectively.

In the third quarter, the Company sold certain of these investments for cash proceeds of approximately $62 million, including the investment in the common stock of Alexander Forbes ("AF"), and recorded a net loss of $4 million.

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11.    Derivatives

Net Investment Hedge

The Company has investments in various subsidiaries with Euro functional currencies. As a result, the Company is exposed to the risk of fluctuations between the Euro and U.S. dollar exchange rates. The Company designated its €1.1 billion senior note debt instruments ("Euro notes") as a net investment hedge (the "hedge") of its Euro denominated subsidiaries. The hedge effectiveness is re-assessed each quarter to confirm that the designated equity balance at the beginning of each period continues to equal or exceed 80% of the outstanding balance of the Euro debt instrument and that all the critical terms of the hedging instrument and the hedged net investment continue to match. If the Company concludes that the hedge is highly effective, the change in the debt balance related to foreign exchange fluctuations is recorded in accumulated other comprehensive loss in the consolidated balance sheets.

The Company concluded that the hedge continues to be highly effective as of September 30, 2022. The U.S. dollar value of the Euro notes decreased $179 million through September 30, 2022, due to the impact of foreign exchange rates, with a corresponding decrease to accumulated other comprehensive loss.

12.    Leases

The Company leases office facilities under non-cancelable operating leases with terms generally ranging between 10 and 25 years. The Company utilizes these leased office facilities for use by its employees in countries in which the Company conducts its business. None of the Company’s leases restrict the payment of dividends or the acquisition of debt or additional lease obligations, or contain significant purchase options.

Operating leases are recognized on the balance sheet as ROU assets and operating lease liabilities based on the present value of the remaining future minimum payments over the lease term at commencement date of the lease.

The following table provides additional information about the Company’s property leases:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Lease Cost:
Operating lease cost (a)	$	84	$	93	$	262	$	282
Short-term lease cost	1		1		3		4
Variable lease cost	35		38		99		101
Sublease income	(3)		(3)		(12)		(16)
Net lease cost	$	117	$	129	$	352	$	371
Other information:
Operating cash outflows from operating leases					$	286	$	310
Right of use assets obtained in exchange for new operating lease liabilities					$	148	$	282
Weighted-average remaining lease term – real estate					8.4 years		9.0 years
Weighted-average discount rate – real estate leases					2.87%		2.75%

(a) Excludes ROU asset impairment charges.

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Future minimum lease payments for the Company’s operating leases as of September 30, 2022 are as follows:

Payment Dates (In millions)	Real Estate Leases
Remainder of 2022	$	90
2023	341
2024	302
2025	272
2026	250
2027	216
Subsequent years	690
Total future lease payments	2,161
Less: Imputed interest	(243)
Total	$	1,918
Current lease liabilities	$	298
Long-term lease liabilities	1,620
Total lease liabilities	$	1,918

Note: The table excludes obligations for leases with original terms of 12 months or less which have not been recognized as a ROU asset or liability in the consolidated balance sheets.

As of September 30, 2022, the Company had additional operating real estate leases that had not yet commenced of $39 million. These operating leases will commence over the next 12 months.

13.    Retirement Benefits

The Company maintains qualified and non-qualified defined benefit pension plans for its U.S. and non-U.S. eligible employees. The Company’s policy for funding its tax-qualified defined benefit pension plans is to contribute amounts at least sufficient to meet the funding requirements set forth by U.S. law and the laws of the non-U.S. jurisdictions in which the Company offers defined benefit plans.

The target asset allocation for the U.S. plans is 60% equities and equity alternatives and 40% fixed income. At September 30, 2022, the actual allocation for the U.S. plans was 61% equities and equity alternatives and 39% fixed income. The target allocation for the U.K. plans at September 30, 2022 is 14% equities and equity alternatives and 86% fixed income. At September 30, 2022, the actual allocation for the U.K. plans was 17% equities and equity alternatives and 83% fixed income. The Company's U.K. plans comprised approximately 81% of non-U.S. plan assets at December 31, 2021. The assets of the Company's defined benefit plans are diversified and are managed in accordance with applicable laws and with the goal of maximizing the plans' real return within acceptable risk parameters. The Company generally uses threshold-based portfolio re-balancing to ensure the actual portfolio remains consistent with target asset allocation ranges.

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The net benefit cost or credit of the Company's defined benefit plans is measured on an actuarial basis using various methods and assumptions. The components of the net benefit credit for defined benefit plans are as follows:

Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Service cost	$	6	$	9
Interest cost	95		87
Expected return on plan assets	(191)		(208)
Recognized actuarial loss	38		52
Net benefit credit	$	(52)	$	(60)
Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Service cost	$	21	$	29
Interest cost	294		258
Expected return on plan assets	(590)		(627)
Recognized actuarial loss	114		155
Net periodic benefit credit	$	(161)	$	(185)
Settlement loss	2		2
Net benefit credit	$	(159)	$	(183)

Amounts Recorded in the Consolidated Statements of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Compensation and benefits expense	$	6	$	9
Other net benefit credit	(58)		(69)
Net benefit credit	$	(52)	$	(60)

Amounts Recorded in the Consolidated Statements of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Compensation and benefits expense	$	21	$	29
Other net benefit credit	(180)		(212)
Net benefit credit	$	(159)	$	(183)

U.S. Plans only	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Interest cost	$	48	$	47
Expected return on plan assets	(85)		(82)
Recognized actuarial loss	19		22
Net benefit credit	$	(18)	$	(13)

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U.S. Plans only	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Interest cost	$	145	$	139
Expected return on plan assets	(253)		(245)
Recognized actuarial loss	56		67
Net benefit credit	$	(52)	$	(39)

Significant non-U.S. Plans only	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Service cost	$	6	$	9
Interest cost	47		40
Expected return on plan assets	(106)		(126)
Recognized actuarial loss	19		30
Net benefit credit	$	(34)	$	(47)

Significant non-U.S. Plans only	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Service cost	$	21	$	29
Interest cost	149		119
Expected return on plan assets	(337)		(382)
Recognized actuarial loss	58		88
Net periodic benefit credit	$	(109)	$	(146)
Settlement loss	2		2
Net benefit credit	$	(107)	$	(144)

The weighted average actuarial assumptions utilized to calculate the net periodic benefit costs for the U.S. and significant non-U.S. defined benefit plans are as follows:

Combined U.S. and significant non-U.S. Plans	Pension Benefits
September 30,	2022		2021
Weighted average assumptions:
Expected return on plan assets	4.56	%	4.72	%
Discount rate	2.28	%	1.92	%
Rate of compensation increase	2.16	%	1.85	%

The Company made contributions to its U.S. and non-U.S. defined benefit pension plans for the three and nine months ended September 30, 2022 of approximately $28 million and $141 million, respectively, compared to contributions of $33 million and $90 million for the corresponding periods in the prior year. The Company expects to contribute approximately $28 million to its U.S. and non-U.S. defined benefit pension plans during the remainder of 2022.

Defined Contribution Plans

The Company maintains certain defined contribution plans ("DC Plans") for its employees, the most significant being in the U.S. and the U.K. The cost of the U.S. DC Plans for the three and nine months ended September 30, 2022 was $39 million and $122 million, respectively, and $37 million and $115 million for the corresponding periods in the prior year. The cost of the U.K. DC Plans for the three and nine months ended September 30, 2022, was $31 million and $108 million, respectively, and $33 million and $106 million for the corresponding periods in the prior year.

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14.    Debt

The Company’s outstanding debt is as follows:

(In millions)	September 30, 2022		December 31, 2021
Short-term:
Commercial paper	$	600	$	—
Current portion of long-term debt	367		17
	967		17
Long-term:
Senior notes – 3.30% due 2023	350		349
Senior notes – 4.05% due 2023	250		249
Senior notes – 3.50% due 2024	599		599
Senior notes – 3.875% due 2024	998		997
Senior notes – 3.50% due 2025	499		498
Senior notes – 1.349% due 2026	535		629
Senior notes – 3.75% due 2026	598		598
Senior notes – 4.375% due 2029	1,499		1,499
Senior notes – 1.979% due 2030	532		614
Senior notes – 2.250% due 2030	740		739
Senior notes – 2.375% due 2031	396		397
Senior notes – 5.875% due 2033	298		298
Senior notes – 4.75% due 2039	495		495
Senior notes – 4.35% due 2047	493		493
Senior notes – 4.20% due 2048	593		593
Senior notes – 4.90% due 2049	1,238		1,238
Senior notes – 2.90% due 2051	346		346
Mortgage – 5.70% due 2035	305		316
Other	2		3
	10,766		10,950
Less current portion	367		17
	$	10,399	$	10,933

The senior notes in the table above are registered by the Company with the Securities and Exchange Commission and are not guaranteed.

On April 9, 2021, the Company increased its short-term commercial paper financing program to $2.0 billion from $1.5 billion. The Company had $600 million of commercial paper outstanding at September 30, 2022, at an average effective interest rate of 3.39%.

Credit Facilities

The Company has a multi-currency unsecured $2.8 billion five-year revolving credit facility (the "Credit Facility"). The interest rate on the Credit Facility is based on LIBOR plus a fixed margin which varies with the Company’s credit ratings. The Credit Facility expires in April 2026, and requires the Company to maintain certain coverage and leverage ratios which are tested quarterly. The Credit Facility includes provisions for determining a LIBOR successor rate in the event LIBOR reference rates are no longer available or in certain other circumstances which are determined to make using an alternative rate desirable. As of September 30, 2022, the Company had no borrowings under this facility.

On May 31, 2022, the Company secured a $250 million uncommitted revolving credit facility. The facility expires in May 2023, and has similar coverage and leverage ratios as the Credit Facility. The Company had no borrowings outstanding under this facility at September 30, 2022.

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Additional credit facilities, guarantees and letters of credit are maintained with various banks aggregating $507 million at September 30, 2022 and $508 million at December 31, 2021. There were no outstanding borrowings under these facilities at September 30, 2022 and December 31, 2021.

Senior Notes

In December 2021, the Company issued $400 million of 2.375% senior notes due 2031 and $350 million of 2.90% senior notes due 2051. The Company used the net proceeds from these issuances for general corporate purposes, and repaid $500 million of 2.75% senior notes with an original maturity date of January 2022 in December 2021.

On April 15, 2021, the Company repaid $500 million of senior notes maturing in July 2021.

Fair Value of Short-term and Long-term Debt

The estimated fair value of the Company's short-term and long-term debt is provided below. Certain estimates and judgments were required to develop the fair value amounts. The fair value amounts shown below are not necessarily indicative of the amounts that the Company would realize upon disposition, nor do they indicate the Company’s intent or need to dispose of the financial instrument.

	September 30, 2022				December 31, 2021
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Short-term debt	$	967	$	965	$	17	$	17
Long-term debt	$	10,399	$	9,434	$	10,933	$	12,466

The fair value of the Company's short-term debt consists primarily of commercial paper and term debt maturing within the next year and its fair value approximates its carrying value. The estimated fair value of a primary portion of the Company's long-term debt is based on discounted future cash flows using current interest rates available for debt with similar terms and remaining maturities. Short-term and long-term debt would be classified as Level 2 in the fair value hierarchy.

15.    Restructuring Costs

Restructuring costs include Company initiated actions related to improving and streamlining the Company's global information technology and HR functions, JLT integration costs, improving efficiencies and client services related to the Marsh operational excellence program, and real estate related costs for exiting leased facilities.

For the three and nine months ended September 30, 2022, the Company incurred costs of $38 million and $96 million, respectively, reflecting $18 million and $44 million in RIS, $5 million and $16 million in Consulting, and $15 million and $36 million in Corporate related to these initiatives.

Details of the restructuring activity from January 1, 2021 through September 30, 2022, are as follows:

(In millions)	Severance		Real Estate Related Costs (a)		Information Technology		Consulting and Other Outside Services		Total
Liability at 1/1/21	$	52	$	51	$	2	$	1	$	106
2021 charges	38		31		23		71		163
Cash payments	(55)		(26)		(25)		(72)		(178)
Non-cash charges	—		(22)		—		—		(22)
Liability at 12/31/21	$	35	$	34	$	—	$	—	$	69
2022 charges	6		12		7		71		96
Cash payments	(31)		(18)		(5)		(70)		(124)
Non-cash charges	—		(5)		(2)		—		(7)
Liability at 9/30/22	$	10	$	23	$	—	$	1	$	34

(a) Includes ROU and fixed asset impairments and other real estate related costs.

The expenses associated with these initiatives are included in compensation and benefits and other operating expenses in the consolidated statements of income. The liabilities associated with these initiatives are classified on the consolidated balance sheets as accounts payable and accrued liabilities, other liabilities or accrued compensation and employee benefits, depending on the nature of the items.

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16.    Common Stock

On March 23, 2022, the Board of Directors of the Company authorized an additional $5 billion in share repurchases. This is in addition to the Company's existing share repurchase program, which had approximately $1.3 billion of remaining authorization as of December 31, 2021.

During the first nine months of 2022, the Company repurchased 10.1 million shares of its common stock for $1.6 billion. As of September 30, 2022, the Company remained authorized to repurchase up to approximately $4.7 billion in shares of its common stock. There is no time limit on the authorization. During the first nine months of 2021, the Company repurchased 5.3 million shares of its common stock for $734 million.

The Company issued approximately 3.1 million shares related to stock compensation and employee stock purchase plans during the first nine months of 2022 and 2021.

In September 2022, the Board of Directors of the Company declared a quarterly dividend of $0.590 per share on outstanding common stock, payable on November 15, 2022, to stockholders of record on October 7, 2022.

In July 2022, the Board of Directors of the Company increased the quarterly dividend by 10% from $0.535 to $0.590 per share paid in the third quarter of 2022.

17.    Claims, Lawsuits and Other Contingencies

Acquisition of Jardine Lloyd Thompson Group plc

On April 1, 2019, the Company completed its previously announced acquisition of all of the outstanding shares of JLT. Upon the consummation of the acquisition of JLT, the Company assumed the legal liabilities and became responsible for JLT’s litigation and regulatory exposures as of April 1, 2019.

Nature of Contingencies

The Company and its subsidiaries are subject to a significant number of claims, lawsuits and proceedings in the course of our business. Such claims and lawsuits consist principally of alleged errors and omissions in connection with the performance of professional services, including the placement of insurance, the provision of actuarial services for corporate and public sector clients, the provision of investment advice and investment management services to pension plans, the provision of advice relating to pension buy-out transactions and the provision of consulting services relating to the drafting and interpretation of trust deeds and other documentation governing pension plans. These claims often seek damages, including punitive and treble damages, in amounts that could be significant. In establishing liabilities for errors and omissions claims in accordance with FASB guidance on Contingencies - Loss Contingencies, the Company uses case level reviews by inside and outside counsel, and internal actuarial analysis by Oliver Wyman, a subsidiary of the Company, and other methods to estimate potential losses. A liability is established when a loss is both probable and reasonably estimable. The liability is reviewed quarterly and adjusted as developments warrant. In many cases, the Company has not recorded a liability, other than for legal fees to defend the claim, because we are unable, at the present time, to make a determination that a loss is both probable and reasonably estimable. To the extent that expected losses exceed our deductible in any policy year, the Company also records an asset for the amount that we expect to recover under any available third-party insurance programs. The Company has varying levels of third-party insurance coverage, with policy limits and coverage terms varying significantly by policy year.

Our activities are regulated under the laws of the United States and its various states, United Kingdom, the European Union and its member states, and the many other jurisdictions in which the Company operates. The Company also receives subpoenas in the ordinary course of business, and, from time to time, requests for information in connection with government investigations.

Current Matters

Risk and Insurance Services Segment

•In January 2019, the Company received a notice that the Administrative Council for Economic Defense anti-trust agency in Brazil had commenced an administrative proceeding against a number of insurance brokers, including both Marsh and JLT, and insurers "to investigate an alleged sharing of sensitive commercial and competitive confidential information" in the aviation insurance and reinsurance sector.

•In 2017, JLT identified payments to a third-party introducer that had been directed to unapproved bank accounts. These payments related to reinsurance placements made on behalf of an Ecuadorian state-owned insurer between 2014 and 2017. In early 2018, JLT voluntarily reported this matter to law enforcement authorities. In February and March 2020, money laundering charges were filed in the United States against a former employee of JLT, the principals of the third-party introducer and a former official of

31

the state-owned insurer. These individuals, including the former JLT employee, have since pleaded guilty to criminal charges.

In March 2022, the U.S. Department of Justice (DOJ) issued a declination letter, declining to pursue any charges against any JLT entity and seeking disgorgement of $29 million in alleged gross profits on this account. As previously disclosed, the Company recorded a charge for this amount in the fourth quarter of 2021. In addition, in March 2022, the Colombian Superintendecia de Sociedades (SS) concluded its investigation of this matter and notified JLT of its intention to seek $2 million in civil penalties which was recorded in the first quarter of 2022. The SS issued its final resolution in May 2022. In June 2022, JLT reached an agreement to settle the investigation by the U.K. Financial Conduct Authority (FCA) for £7.9 million (or $11 million) in civil penalties which concluded the FCA’s investigation into this matter, and the Company recorded a charge for this amount in the second quarter of 2022.

•From 2014, Marsh Ltd. was engaged by Greensill Capital (UK) Limited as its insurance broker. Marsh Ltd. placed a number of trade credit insurance policies for Greensill. On March 1, 2021, Greensill filed an action against certain of its trade credit insurers in Australia seeking a mandatory injunction compelling these insurers to renew coverage under expiring policies. Later that day, the Australian court denied Greensill’s application. Since then, a number of Greensill entities have filed for, or been subject to, insolvency proceedings, and several litigations and investigations have been commenced in the U.K., Australia, Germany, Switzerland and the U.S.

Consulting Segment

•In 2014, the FCA conducted an industry-wide review of the suitability of financial advice provided to individuals by a number of companies, including JLT, relating to enhanced transfer value ("ETV") defined benefit pension transfers. In January 2015, the FCA notified JLT that it was commissioning a Skilled Person review of ETV pension transfer advice given by JLT and a business acquired by JLT in 2012. Following the Skilled Person review which took place between 2015 and 2018, JLT engaged a compliance consulting firm to conduct an analysis of approximately 14,000 individual files to assess the suitability of the advice provided and, where appropriate, the amount of redress to be paid. In February 2019, prior to the completion of its acquisition by the Company, JLT recorded a gross liability of £59 million (or $77 million). This preliminary estimate by JLT, reflected projected redress amounts based on the limited number of files examined as part of the Skilled Person review and report. Thereafter, the FCA expanded the scope of the review. As of December 31, 2020, the updated redress liability, including the projected costs of completing the review, increased to £155 million (or $210 million) resulting from the expansion in the scope of the review, and the significant progress made in completing the individual suitability reviews. Payments of redress and expenses during 2021 and the first nine months of 2022 reduced the recorded liability to £6 million (or $6 million) as of September 30, 2022. The suitability review and calculation of redress for affected customers is now substantially complete, and the vast majority of redress payments have been made. In July 2022, the FCA notified JLT that it had closed its review of this matter. This gross liability has been, and we anticipate will continue to be, partially offset by a contractual indemnity obligation and insurance recoveries from third-party E&O insurers.

At this time, we are unable to predict the likely timing, outcome or ultimate impact of the foregoing matters. Adverse determinations in one or more of these matters could have a material impact on the Company's consolidated results of operations, financial condition or cash flows in a future period.

Other Contingencies-Guarantees

In connection with its acquisition of U.K.-based Sedgwick Group in 1998, the Company acquired several insurance underwriting businesses that were already in run-off, including River Thames Insurance Company Limited ("River Thames"), which the Company sold in 2001. Sedgwick guaranteed payment of claims on certain policies underwritten through the Institute of London Underwriters (the "ILU") by River Thames. The policies covered by this guarantee are partly reinsured by a related party of River Thames. Payment of claims under the reinsurance agreement is collateralized by funds withheld by River Thames from the reinsurer. To the extent River Thames or the reinsurer is unable to meet its obligations under those policies, a claimant may seek to recover from the Company under the guarantee.

From 1980 to 1983, the Company owned indirectly the English & American Insurance Company ("E&A"), which was a member of the ILU. The ILU required the Company to guarantee a portion of E&A's obligations. After E&A became insolvent in 1993, the ILU agreed to discharge the guarantee in exchange for the Company's agreement to post an evergreen letter of credit that is available to pay claims by policyholders on certain E&A policies issued through the

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ILU and incepting between July 3, 1980 and October 6, 1983. Certain claims have been paid under the letter of credit and the Company anticipates that additional claimants may seek to recover against the letter of credit.

* * * *

The pending proceedings described above and other matters not explicitly described in this Note 17 on Claims, Lawsuits and Other Contingencies may expose the Company or its subsidiaries to liability for significant monetary damages, fines, penalties or other forms of relief. Where a loss is both probable and reasonably estimable, the Company establishes liabilities in accordance with FASB guidance on Contingencies - Loss Contingencies.

Except as described above, the Company is not able at this time to provide a reasonable estimate of the range of possible loss attributable to these matters or the impact they may have on the Company's consolidated results of operations, financial position or cash flows. This is primarily because these matters are still developing and involve complex issues subject to inherent uncertainty. Adverse determinations in one or more of these matters could have a material impact on the Company's consolidated results of operations, financial condition or cash flows in a future period.

18.    Segment Information

The Company is organized based on the types of services provided. Under this structure, the Company’s segments are:

•Risk and Insurance Services, comprising insurance services (Marsh) and reinsurance services (Guy Carpenter); and

•Consulting, comprising Mercer and the Oliver Wyman Group.

The accounting policies of the segments are the same as those utilized for the consolidated financial statements described in Note 1, Summary of Significant Accounting Policies, in the Company’s 2021 Form 10-K. Segment performance is evaluated based on segment operating income, which includes directly related expenses, and charges or credits related to integration and restructuring but not the Company’s corporate-level expenses. Revenues are attributed to geographic areas on the basis of where the services are performed.

Selected information about the Company’s segments for the three and nine months ended September 30, 2022 and 2021 is as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(In millions)	Revenue			Operating Income (Loss)		Revenue			Operating Income (Loss)
2022–
Risk and Insurance Services	$	2,838	(a)	$	529	$	9,700	(c)	$	2,617
Consulting	1,951		(b)	350		6,045		(d)	1,217
Total Operating Segments	4,789			879		15,745			3,834
Corporate/Eliminations	(19)			(88)		(47)			(234)
Total Consolidated	$	4,770		$	791	$	15,698		$	3,600
2021–
Risk and Insurance Services	$	2,670	(a)	$	403	$	9,036	(c)	$	2,413
Consulting	1,925		(b)	404		5,690		(d)	1,109
Total Operating Segments	4,595			807		14,726			3,522
Corporate/Eliminations	(12)			(67)		(43)			(196)
Total Consolidated	$	4,583		$	740	$	14,683		$	3,326

(a) Includes interest income on fiduciary funds of $40 million and $4 million in 2022 and 2021, respectively, and equity method income of $8 million in 2021.

(b) Includes inter-segment revenue of $19 million and $11 million in 2022 and 2021, respectively.

(c) Includes inter-segment revenue of $5 million in both 2022 and 2021, interest income on fiduciary funds of $57 million and $12 million in 2022 and 2021, respectively, and equity method income of $9 million and $25 million in 2022 and 2021, respectively. Revenue for 2022 also includes the loss on deconsolidation of the Russian businesses of $27 million. Revenue for 2021 includes $52 million primarily from the gain on the sale of the U.K. commercial networks business.

(d) Includes inter-segment revenue of $42 million and $38 million in 2022 and 2021, respectively. Revenue for 2022 also includes a gain on the sale of the Mercer U.S. affinity business of $112 million, partly offset by the loss on deconsolidation of the Russian businesses of $12 million.

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Details of operating segment revenue for the three and nine months ended September 30, 2022 and 2021 are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Risk and Insurance Services
Marsh	$	2,497	$	2,355	$	7,833	$	7,336
Guy Carpenter	341		315		1,867		1,700
Total Risk and Insurance Services	2,838		2,670		9,700		9,036
Consulting
Mercer	1,284		1,315		4,016		3,877
Oliver Wyman Group	667		610		2,029		1,813
Total Consulting	1,951		1,925		6,045		5,690
Total Operating Segments	4,789		4,595		15,745		14,726
Corporate Eliminations	(19)		(12)		(47)		(43)
Total	$	4,770	$	4,583	$	15,698	$	14,683

19.    New Accounting Guidance

New Accounting Pronouncement Adopted Effective January 1, 2022:

In October 2021, the FASB issued new guidance for measuring contract assets and contract liabilities acquired in a business combination. In accordance with the new guidance, contract assets and contract liabilities should be measured in accordance with the guidance for revenue from contracts with customers as opposed to the guidance for business combinations. The guidance must be applied on a prospective basis, and is effective for fiscal years beginning after December 15, 2022, including interim periods therein. Early adoption is permitted. The Company elected to adopt this new standard effective January 1, 2022. Adoption of this guidance did not have a material impact on the Company's financial position or results of operations.    

New Accounting Pronouncements Adopted Effective January 1, 2021:

In January 2020, the FASB issued guidance that addresses accounting for the transition into and out of the equity method and measuring certain purchased options and forward contracts to acquire investments. The standard takes effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The adoption of this standard did not have a material impact on the Company’s financial position or its results of operations.

In December 2019, the FASB issued guidance related to the accounting for income taxes. The standard removes specific exceptions in the current rules and eliminates the need for an organization to analyze whether the following apply in a given period: (a) exception to the incremental approach for intraperiod tax allocation; (b) exceptions to accounting for basis differences when there are ownership changes in foreign investments and (c) exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses. The standard also is designed to improve financial statement preparers’ application of income tax-related guidance and simplify GAAP for (a) franchise taxes that are partially based on income; (b) transactions with a government that result in a step-up in the tax basis of goodwill; (c) separate financial statements of legal entities that are not subject to tax and (d) enacted changes in tax laws in interim periods. The standard takes effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The adoption of this standard did not have a material impact on the Company’s financial position or its results of operations.

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

General

Marsh & McLennan Companies, Inc. and its consolidated subsidiaries (the "Company") is a global professional services firm offering clients advice in the areas of risk, strategy and people. The Company’s 86,000 colleagues advise clients in over 130 countries. With annual revenue of approximately $20 billion, the Company helps clients navigate an increasingly dynamic and complex environment through four market-leading businesses. Marsh provides data-driven risk advisory services and insurance solutions to commercial and consumer clients. Guy Carpenter develops advanced risk, reinsurance and capital strategies that help clients grow profitably and identify and capitalize on emerging opportunities. Mercer delivers advice and solutions that help organizations create a dynamic world of work, shape retirement and investment outcomes, and unlock health and well being for a changing workforce. Oliver Wyman Group serves as a critical strategic, economic and brand advisor to private sector and governmental clients.

The Company conducts business through two segments:

•Risk and Insurance Services includes risk management activities (risk advice, risk transfer and risk control and mitigation solutions) as well as insurance and reinsurance broking and services. The Company conducts business in this segment through Marsh and Guy Carpenter.

•Consulting includes health, wealth and career consulting services and products, and specialized management, economic and brand consulting services. The Company conducts business in this segment through Mercer and Oliver Wyman Group.

The results of operations in the Management Discussion & Analysis ("MD&A") includes an overview of the Company's consolidated three and nine months ended September 30, 2022 results compared to the corresponding periods in 2021, and should be read in conjunction with the consolidated financial statements and notes. This section also includes a discussion of the key drivers impacting the Company's financial results of operations both on a consolidated basis and by reportable segments.

We describe the primary sources of revenue and categories of expense for each segment in the discussion of segment financial results. A reconciliation of segment operating income to total operating income is included in Note 18, Segment Information, in the notes to the consolidated financial statements included in Part I, Item 1 of this report.

For information on the three and nine months ended September 30, 2021 results and similar comparisons, see "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" of our Form 10-Q for the quarter ended September 30, 2021.

This MD&A contains forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. See "Information Concerning Forward-Looking Statements" at the outset of this report.

Financial Highlights

•Consolidated revenue for the three months ended September 30, 2022 was $4.8 billion, an increase of 4% or 8% on an underlying basis compared to the corresponding quarter in the prior year. For the nine months ended September 30, 2022, consolidated revenue was $15.7 billion, an increase of 7% or 9% on an underlying basis compared to the corresponding period in the prior year.

•Consolidated operating income increased $51 million, or 7% to $791 million for the three months ended September 30, 2022, compared to the corresponding quarter in the prior year. Net income attributable to the Company was $546 million. Earnings per share increased 3% to $1.08. For the nine months ended September 30, 2022, consolidated operating income increased $274 million, or 8% to $3.6 billion compared to the corresponding period in the prior year. Net income attributable to the Company was $2.6 billion. Earnings per share increased 12% to $5.11.

•Risk and Insurance Services revenue for the three months ended September 30, 2022 was $2.8 billion, an increase of 6%, or 9% on an underlying basis. Operating income was $529 million, compared with $403 million in the corresponding quarter in the prior year. For the nine months ended September 30, 2022, Risk and Insurance Services revenue was $9.7 billion, an increase of 7%, or 10% on an underlying basis. Operating income was $2.6 billion, compared with $2.4 billion for the corresponding period in the prior year.

•Consulting revenue for the three months ended September 30, 2022 was $2.0 billion, an increase of 1%, or 8% on an underlying basis. Operating income was $350 million, compared with $404 million in the corresponding quarter in the prior year. For the nine months ended September 30, 2022, Consulting

35

revenue was $6.0 billion, an increase of 6%, or 9% on an underlying basis. Operating income was $1.2 billion, compared with $1.1 billion for the corresponding period in the prior year.

•In April 2022, Mercer sold its U.S. affinity business that provided insurance marketing, brokerage and administration to association and affinity groups for cash proceeds of approximately $140 million and a net gain of $112 million.

•In June 2022, Marsh McLennan Agency ("MMA") acquired Clark Insurance, a full-service independent insurance agency in Maine.

•In September 2022, Oliver Wyman acquired Booz Allen Hamilton's management consulting business serving the Middle East and North Africa regions.

•Results for the nine months ended September 30, 2022, include a loss of $52 million on the deconsolidation of the Company's Russian businesses and other related charges. In June 2022, the Company also entered into a definitive agreement to exit its businesses in Russia and transfer ownership of its Russian entities to local management which are currently pending regulatory approvals.

•In the third quarter of 2022, the Company repurchased 3.1 million shares of stock for $500 million. For the nine months ended September 30, 2022, the Company repurchased 10.1 million shares for $1.6 billion.

For additional details, refer to the Consolidated Results of Operations and Liquidity and Capital Resources sections in this MD&A.

Acquisitions and dispositions impacting the Risk and Insurance Services and Consulting segments are discussed in Note 8, Acquisitions and Dispositions, in the notes to the consolidated financial statements.

Deconsolidation of Russia

On February 24, 2022, Russian forces launched a military invasion of Ukraine. In response, the United States, the European Union, United Kingdom and other governments have imposed significant economic sanctions on Russia, and Russia has responded with counter-sanctions. The war in Ukraine has disrupted international commerce and the global economy.

In the first quarter of 2022, the Company concluded that it did not meet the accounting criteria for control over its wholly-owned Russian businesses due to the evolving trade and economic sanctions, and recorded a loss of $52 million on the deconsolidation of the Russian businesses and other related charges.

In June 2022, the Company entered into a definitive agreement to exit its businesses in Russia and transfer ownership to local management pending regulatory approvals. Refer to Note 8, Acquisitions and Dispositions, in the notes to the consolidated financial statements for additional information on the deconsolidation of the Russian businesses.

The war in Ukraine has continued to result in worldwide geopolitical and macroeconomic uncertainty. The Company continues to monitor the ongoing situation and its potential impact on our business, financial condition, results of operations and cash flows.

Business Update related to COVID-19

For nearly three years, the COVID-19 pandemic has impacted businesses globally including in every geography in which the Company operates. Our businesses have remained resilient throughout the pandemic and demand for our advice and services remains strong. The ultimate extent of the impact of COVID-19 to the Company will depend on future developments that it is unable to predict.

Factors that could adversely affect the Company’s financial statements related to the financial and operational impact of COVID-19 are outlined in “Item 1A - Risk Factors” in the Company’s Form 10-K for the year ended December 31, 2021.

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Consolidated Results of Operations

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2022		2021		2022		2021
Revenue	$	4,770	$	4,583	$	15,698	$	14,683
Expense:
Compensation and benefits	2,923		2,853		9,033		8,520
Other operating expenses	1,056		990		3,065		2,837
Operating expenses	3,979		3,843		12,098		11,357
Operating income	791		740		3,600		3,326
Income before income taxes	733		716		3,469		3,247
Net income before non-controlling interests	552		542		2,616		2,367
Net income attributable to the Company	$	546	$	537	$	2,584	$	2,340
Net income per share attributable to the Company:
- Basic	$	1.10	$	1.06	$	5.16	$	4.61
- Diluted	$	1.08	$	1.05	$	5.11	$	4.56
Average number of shares outstanding:
- Basic	498		506		501		508
- Diluted	503		513		506		513
Shares outstanding at September 30,	497		505		497		505

Consolidated operating income increased $51 million, or 7% to $791 million for the three months ended September 30, 2022, compared to the corresponding prior year quarter, reflecting a 4% increase in both revenue and expenses. Revenue growth was driven by increases in the Risk and Insurance Services and Consulting segments of 6% and 1%, respectively.

Consolidated operating income increased $274 million, or 8% to $3.6 billion for the nine months ended September 30, 2022, compared to the corresponding period in the prior year, reflecting a 7% increase in both revenue and expenses. The revenue growth was driven by increases in the Risk and Insurance Services and Consulting segments of 7% and 6%, respectively.

The increase in revenue for the three and nine months ended September 30, 2022, reflects the continued strong demand for our advice and services and the expansion of the global economy. The increase in expenses is primarily due to increased headcount and higher incentive compensation. Expenses also reflect higher travel and entertainment costs, partly offset by lower depreciation and amortization primarily in the Risk and Insurance Services segment for the nine months ended September 30, 2022, compared to the corresponding periods in the prior year.

Diluted earnings per share increased 3% to $1.08 for the three months ended September 30, 2022, compared to $1.05 for the three months ended September 30, 2021, and 12% to $5.11 for the nine months ended September 30, 2022, compared to $4.56 for the nine months ended September 30, 2021. The increase for both the three and nine months ended September 30, 2022 is primarily the result of higher operating income in 2022 compared to the corresponding periods in the prior year. For the three and nine months ended September 30, 2022, net operating income was also impacted by foreign exchange movements across both segments due to the strengthening of the U.S. dollar in 2022.

Results for the nine months ended September 30, 2022 also include the net gain from the sale of the Mercer U.S. affinity business of approximately $112 million, offset by a charge of approximately $52 million for the deconsolidation of the Company's Russian businesses and other related charges in Marsh and Oliver Wyman recorded in the first quarter of 2022. Results for the three and nine months ended September 30, 2021, included a $63 million reduction in the liability for a legacy JLT Errors and Omissions ("E&O"), as well as recoveries under indemnities and insurance. The nine months ended September 30, 2021, also included a net charge of approximately $100 million related to the remeasurement of deferred taxes and liabilities due to the enactment of a tax rate increase from 19% to 25% in the U.K. in the second quarter of 2021.

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In the three and nine months ended September 30, 2022 and 2021, the Company's results of operations and earnings per share were impacted by the following items:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Restructuring	$	38	$	31	$	96	$	96
Changes in contingent consideration	11		18		38		11
JLT acquisition-related costs	4		11		28		35
JLT legacy legal charges	—		(63)		3		(63)
Legal claims and other	—		22		39		29
Disposal of businesses	—		—		(114)		(49)
Deconsolidation of Russian businesses and other related charges	—		—		52		—
Other	7		—		—		—
Impact on income before taxes	$	60	$	19	$	142	$	59

•Restructuring: Reflects costs primarily related to the Company's global information technology and HR functions, JLT integrations costs, Marsh operational excellence and adjustments to restructuring liabilities for future rent under non-cancellable leases.

•Changes in contingent consideration: Primarily includes the change in fair value of contingent consideration related to acquisitions and dispositions measured each quarter.

•JLT acquisition-related costs: Includes retention costs related to the acquisition of JLT.

•JLT legacy legal charges: Reflects charges and recoveries related to legacy JLT legal matters in 2022. In the third quarter of 2021, the Company recorded a $36 million reduction in the liability for a legacy JLT E&O related to the suitability of advice provided to individuals for defined benefit pension transfers in the U.K., as well as $27 million of recoveries under indemnities and insurance. See Note 17, Claims, Lawsuits and Other Contingencies, in the notes to the consolidated financial statements in this report for additional detail.

•Legal claims and Other: The Company recorded settlement and legal costs related to strategic recruiting.

•Disposal of Businesses: Reflects a gain on the sale of the Mercer U.S. affinity business during the second quarter of 2022, that provided insurance marketing, brokerage and administration to association and affinity groups. The nine months ended September 30, 2021, primarily reflects a gain on the sale of the U.K. commercial networks business that provided broking and back-office solutions for small independent brokers. These amounts are reflected as a component of revenue in the consolidated statements of income and excluded from the calculations of underlying revenue.

•Deconsolidation of Russian businesses and other related charges: The loss on deconsolidation is included in revenue and excluded from the underlying revenue calculations.

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Consolidated Revenue and Expense

Revenue – Components of Change

The Company conducts business in 130 countries. As a result, foreign exchange rate movements may impact period-to-period comparisons of revenue. Similarly, certain other items such as the revenue impact of acquisitions and dispositions, including transfers among businesses, may impact period-to-period comparisons of revenue. Underlying revenue measures the change in revenue from one period to the next by isolating these impacts.

The impact of foreign currency exchange fluctuations, acquisitions and dispositions, including transfers among businesses, on the Company’s operating revenues by segment are as follows:

	Three Months Ended September 30,				% Change GAAP Revenue		Components of Revenue Change*
							Currency Impact		Acquisitions/ Dispositions/ Other Impact		Underlying Revenue
(In millions, except percentages)	2022		2021
Risk and Insurance Services
Marsh	$	2,470	$	2,352	5	%	(4)	%	1	%	8	%
Guy Carpenter	328		314		4	%	(3)	%	—		7	%
Subtotal	2,798		2,666		5	%	(4)	%	1	%	8	%
Fiduciary Interest Income	40		4
Total Risk and Insurance Services	2,838		2,670		6	%	(4)	%	1	%	9	%
Consulting
Mercer	1,284		1,315		(2)	%	(6)	%	(2)	%	5	%
Oliver Wyman Group	667		610		9	%	(5)	%	1	%	13	%
Total Consulting	1,951		1,925		1	%	(6)	%	(1)	%	8	%
Corporate Eliminations	(19)		(12)
Total Revenue	$	4,770	$	4,583	4	%	(5)	%	—		8	%

* Components of revenue change may not add due to rounding.

	Three Months Ended September 30,				% Change GAAP Revenue		Components of Revenue Change*
							Currency Impact		Acquisitions/ Dispositions/ Other Impact		Underlying Revenue
(In millions, except percentages)	2022		2021
Marsh:
EMEA	$	589	$	600	(2)	%	(11)	%	(1)	%	9	%
Asia Pacific	312		281		11	%	(9)	%	7	%	14	%
Latin America	118		105		12	%	(3)	%	—		15	%
Total International	1,019		986		3	%	(9)	%	2	%	11	%
U.S./Canada	1,451		1,366		6	%	—		1	%	5	%
Total Marsh	$	2,470	$	2,352	5	%	(4)	%	1	%	8	%
Mercer:
Wealth	$	561	$	613	(9)	%	(7)	%	—		(1)	%
Health	451		449		1	%	(4)	%	(5)	%	10	%
Career	272		253		8	%	(7)	%	—		15	%
Total Mercer	$	1,284	$	1,315	(2)	%	(6)	%	(2)	%	5	%

* Components of revenue change may not add due to rounding.

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	Nine Months Ended September 30,				% Change GAAP Revenue		Components of Revenue Change*
							Currency Impact		Acquisitions/ Dispositions/ Other Impact		Underlying Revenue
(In millions, except percentages)	2022		2021
Risk and Insurance Services
Marsh	$	7,794	$	7,327	6	%	(3)	%	—		9	%
Guy Carpenter	1,849		1,697		9	%	(2)	%	1	%	10	%
Subtotal	9,643		9,024		7	%	(3)	%	1	%	9	%
Fiduciary interest income	57		12
Total Risk and Insurance Services	9,700		9,036		7	%	(3)	%	1	%	10	%
Consulting
Mercer	4,016		3,877		4	%	(4)	%	2	%	6	%
Oliver Wyman Group	2,029		1,813		12	%	(4)	%	1	%	15	%
Total Consulting	6,045		5,690		6	%	(4)	%	1	%	9	%
Corporate Eliminations	(47)		(43)
Total Revenue	$	15,698	$	14,683	7	%	(3)	%	1	%	9	%

* Components of revenue change may not add due to rounding.

	Nine Months Ended September 30,				% Change GAAP Revenue		Components of Revenue Change*
							Currency Impact		Acquisitions/ Dispositions/ Other Impact		Underlying Revenue
(In millions, except percentages)	2022		2021
Marsh:
EMEA	$	2,176	$	2,233	(3)	%	(7)	%	(4)	%	8	%
Asia Pacific	1,015		902		13	%	(7)	%	6	%	14	%
Latin America	340		298		14	%	(1)	%	—		15	%
Total International	3,531		3,433		3	%	(6)	%	(1)	%	10	%
U.S./Canada	4,263		3,894		9	%	—		1	%	8	%
Total Marsh	$	7,794	$	7,327	6	%	(3)	%	—		9	%
Mercer:
Wealth	$	1,775	$	1,861	(5)	%	(5)	%	—		1	%
Health	1,562		1,398		12	%	(3)	%	5	%	10	%
Career	679		618		10	%	(5)	%	—		15	%
Total Mercer	$	4,016	$	3,877	4	%	(4)	%	2	%	6	%

* Components of revenue change may not add due to rounding.

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Consolidated Revenue

Consolidated revenue increased $187 million, or 4% to $4.8 billion for the three months ended September 30, 2022, compared to $4.6 billion for the three months ended September 30, 2021. Consolidated revenue increased 8% on an underlying basis, partly offset by a decrease of 5% from the impact of foreign currency translation. On an underlying basis, revenue increased 9% and 8% for the three months ended September 30, 2022, in the Risk and Insurance Services and Consulting segments, respectively.

Consolidated revenue increased $1.0 billion, or 7% to $15.7 billion for the nine months ended September 30, 2022, compared to $14.7 billion for the nine months ended September 30, 2021. Consolidated revenue increased 9% on an underlying basis and 1% from acquisitions, partly offset by a decrease of 3% from the impact of foreign currency translation. On an underlying basis, revenue increased 10% and 9% for the nine months ended September 30, 2022, in the Risk and Insurance Services and Consulting segments, respectively.

Underlying revenue growth in the Risk and Insurance Services and Consulting segments for the three and nine months ended September 30, 2022, was driven by strong demand for our advice and services, the expansion of the global economy, new business growth, and solid retention including continued benefits from pricing in the market place.

Consolidated Operating Expenses

Consolidated operating expenses increased $136 million, or 4% to $4.0 billion for the three months ended September 30, 2022, compared to $3.8 billion for the three months ended September 30, 2021, reflecting an increase of 9% on an underlying basis and 1% from acquisitions, partly offset by a decrease of 6% from the impact of foreign currency translation. On an underlying basis, expenses increased 6% and 12% for the three months ended September 30, 2022, in the Risk and Insurance Services and Consulting segments, respectively.

Consolidated operating expenses increased $741 million, or 7% to $12.1 billion for the nine months ended September 30, 2022, compared to $11.4 billion for the nine months ended September 30, 2021, reflecting increases of 10% on an underlying basis and 1% from acquisitions, partly offset by a decrease of 4% from the impact of foreign currency translation. On an underlying basis, expenses increased 9% and 10% for the nine months ended September 30, 2022, in the Risk and Insurance Services and Consulting segments, respectively.

The increase in underlying expenses for the three and nine months ended September 30, 2022 is primarily due to increased headcount and higher incentive compensation. Expenses also reflect higher travel and entertainment costs, partly offset by lower depreciation and amortization primarily in the Risk and Insurance Services segment for the nine months ended September 30, 2022, compared to the corresponding periods in the prior year.

Risk and Insurance Services

In the Risk and Insurance Services segment, the Company’s subsidiaries and other affiliated entities act as brokers, agents or consultants for insureds, insurance underwriters and other brokers in the areas of risk management, insurance broking and insurance program management services, primarily under the name of Marsh, and engage in reinsurance broking, catastrophe and financial modeling services and related advisory functions, primarily under the name of Guy Carpenter.

The results of operations for the Risk and Insurance Services segment are presented below:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except percentages)	2022		2021		2022		2021
Revenue	$	2,838	$	2,670	$	9,700	$	9,036
Compensation and benefits	1,688		1,634		5,239		4,876
Other operating expenses	621		633		1,844		1,747
Operating expenses	2,309		2,267		7,083		6,623
Operating income	$	529	$	403	$	2,617	$	2,413
Operating income margin	18.7%		15.1%		27.0%		26.7%

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Revenue

Revenue in the Risk and Insurance Services segment increased $168 million, or 6% to $2.8 billion for the three months ended September 30, 2022, compared to $2.7 billion for the three months ended September 30, 2021. Revenue grew 9% on an underlying basis and 1% from the impact of acquisitions, partly offset by a decrease of 4% related to the impact of foreign currency translation. Interest earned on fiduciary funds increased $36 million to $40 million for the three months ended September 30, 2022, compared to $4 million for the three months ended September 30, 2021.

Revenue in the Risk and Insurance Services segment increased $664 million, or 7% to $9.7 billion for the nine months ended September 30, 2022, compared to $9.0 billion for the nine months ended September 30, 2021. Revenue grew 10% on an underlying basis and 1% from the impact of acquisitions, partly offset by a decrease of 3% related to the impact of foreign currency translation. Interest earned on fiduciary funds increased $45 million to $57 million for the nine months ended September 30, 2022, compared to $12 million for the nine months ended September 30, 2021.

The increase in underlying revenue in the Risk and Insurance Services segment for the three and nine months ended September 30, 2022 was primarily due to growth in new business from existing clients, investments in talent, and solid retention including continued benefits from pricing in the marketplace. The increase in interest earned on fiduciary funds in 2022 is a result of higher interest rates compared to the corresponding periods in the prior year.

At Marsh, revenue increased $118 million, or 5% to $2.5 billion for the three months ended September 30, 2022, compared to $2.4 billion for the three months ended September 30, 2021. This reflects an increase of 8% on an underlying basis and an increase of 1% from the impact of acquisitions, partly offset by 4% from the impact of foreign currency translation. On an underlying basis, the U.S. and Canada rose 5%. Total International operations produced underlying revenue growth of 11%, reflecting growth of 14% in Asia Pacific, 9% in EMEA and 15% in Latin America.

At Marsh, revenue increased $467 million, or 6% to $7.8 billion for the nine months ended September 30, 2022, compared to $7.3 billion for the nine months ended September 30, 2021. This reflects an increase of 9% on an underlying basis, partly offset by a decrease of 3% from the impact of foreign currency translation. On an underlying basis, the U.S. and Canada rose 8%. Total International operations produced underlying revenue growth of 10%, reflecting growth of 14% in Asia Pacific, 8% in EMEA and 15% in Latin America.

Results for the nine months ended September 30, 2022 also included a charge of approximately $27 million related to the loss on deconsolidation of the Company's Russian businesses. The nine months ended September 30, 2021 included a gain of approximately $50 million related to the disposition of the commercial networks business in the U.K. that provided broking and back-office solutions for small independent brokers.

At Guy Carpenter, revenue increased $14 million, or 4% to $328 million for the three months ended September 30, 2022, compared to $314 million for the three months ended September 30, 2021. On an underlying basis, revenue increased 7%.

At Guy Carpenter, revenue increased $152 million, or 9% to $1.8 billion for the nine months ended September 30, 2022, compared to $1.7 billion for the nine months ended September 30, 2021. On an underlying basis, revenue increased 10%.

The Risk and Insurance Services segment completed eight acquisitions during the nine months ended September 30, 2022. Information regarding these acquisitions is included in Note 8, Acquisitions and Dispositions, in the notes to the consolidated financial statements.

Operating Expenses

Expenses in the Risk and Insurance Services segment increased $42 million, or 2% to $2.3 billion for the three months ended September 30, 2022, compared to the corresponding quarter in the prior year. This reflects an increase of 6% on an underlying basis and 1% from the impact of acquisitions, partly offset by a decrease of 6% from the impact of foreign currency translation.

Expenses in the Risk and Insurance Services segment increased $460 million, or 7% to $7.1 billion for the nine months ended September 30, 2022, compared to $6.6 billion for the nine months ended September 30, 2021. This reflects increases of 9% on an underlying basis and 2% from the impact of acquisitions, partly offset by a decrease of 4% from the impact of foreign currency translation.

The increase in underlying expenses for the three and nine months ended September 30, 2022 is primarily due to increased headcount and higher incentive compensation. Expenses also reflect higher travel and entertainment costs, partly offset by lower depreciation and amortization for the nine months ended September 30, 2022, compared to the corresponding periods in the prior year.

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Consulting

The Company conducts business in its Consulting segment through Mercer and Oliver Wyman Group. Mercer delivers advice and solutions that help organizations create a dynamic world of work, shape retirement and investment outcomes, and unlock health and well being for a changing workforce. Oliver Wyman serves as critical strategic, economic and brand advisor to private sector and governmental clients.

The results of operations for the Consulting segment are presented below:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except percentages)	2022		2021		2022		2021
Revenue	$	1,951	$	1,925	$	6,045	$	5,690
Compensation and benefits	1,107		1,103		3,416		3,287
Other operating expenses	494		418		1,412		1,294
Operating expenses	1,601		1,521		4,828		4,581
Operating income	$	350	$	404	$	1,217	$	1,109
Operating income margin	17.9%		21.0%		20.1%		19.5%

Revenue

Consulting revenue increased $26 million, or 1% to $2.0 billion for the three months ended September 30, 2022, compared to $1.9 billion for the three months ended September 30, 2021. This reflects an increase of 8% on an underlying basis, offset by a decrease of 1% from the disposition of businesses and a decrease of 6% related to the impact of foreign currency translation.

Consulting revenue increased $355 million, or 6% to $6.0 billion for the nine months ended September 30, 2022, compared to $5.7 billion for the nine months ended September 30, 2021. This reflects an increase of 9% on an underlying basis and 1% from the disposition of businesses, partly offset by a decrease of 4% related to the impact of foreign currency translation.

Mercer's revenue decreased $31 million, or 2% to $1.3 billion for the three months ended September 30, 2022, compared to the corresponding quarter in the prior year. This reflects an increase of 5% on an underlying basis, offset by a decrease of 2% from the disposition of businesses and a decrease of 6% from the impact of foreign currency translation. On an underlying basis, revenue for Career and Health increased 15% and 10%, respectively, while revenue for Wealth decreased 1%, as compared to the corresponding quarter in the prior year.

Mercer's revenue increased $139 million, or 4% to $4.0 billion for the nine months ended September 30, 2022, compared to $3.9 billion for the corresponding period in the prior year. This reflects an increase of 6% on an underlying basis and 2% from the disposition of businesses, partly offset by a decrease of 4% from the impact of foreign currency translation. On an underlying basis, revenue for Career, Health and Wealth increased 15%, 10% and 1%, respectively, as compared to the corresponding period in the prior year.

The increase in underlying revenue at Mercer for the three and nine months ended September 30, 2022 was primarily due to strong demand for our advice and services and the expansion of the global economy. The increase in underlying revenue for Career products and services was due to continued demand for solutions linked to new ways of working, skill gaps, workforce transformation and diversity & inclusion issues. Health continued to benefit from growth in new business, higher retention, increased enrolled lives from a strong labor market, and medical inflation. Underlying revenue in Wealth grew in project-based services for the three and nine months ended September 30, 2022, offset by decrease in investment management fees from the decline in assets under management due to market volatility on investments. Results for the nine months ended September 30, 2022 also included a net gain of $112 million from the sale of the Mercer U.S. affinity business.

Oliver Wyman's revenue increased $57 million, or 9% to $667 million for the three months ended September 30, 2022, compared to $610 million for the corresponding quarter in the prior year, reflecting an increase of 13% on an underlying basis and 1% from the impact of acquisitions, partly offset by a decrease of 5% related to the impact of foreign currency translation.

Oliver Wyman's revenue increased $216 million, or 12% to $2.0 billion for the nine months ended September 30, 2022, compared to $1.8 billion for the corresponding period in the prior year. This reflects an increase of 15% on an underlying basis and 1% from the impact of acquisitions, partly offset by a decrease of 4% from the impact of foreign currency translation.

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The increase in underlying revenue at Oliver Wyman for the three and nine months ended September 30, 2022 was primarily due to the increased demand for project-based services across all industries. Results for the nine months ended September 30, 2022 also included a charge of approximately $12 million at Oliver Wyman related to the loss on the deconsolidation of the Company's Russian businesses.

The Consulting segment completed three acquisitions during the nine months ended September 30, 2022. Information regarding these acquisitions is included in Note 8, Acquisitions and Dispositions, in the notes to the consolidated financial statements.

Operating Expenses

Consulting expenses increased $80 million, or 5% to $1.6 billion for the three months ended September 30, 2022, compared to $1.5 billion for the three months ended September 30, 2021. This reflects an increase of 12% on an underlying basis, partly offset by a 6% decrease from the impact of foreign currency translation.

Consulting expenses increased $247 million, or 5% to $4.8 billion for the nine months ended September 30, 2022, compared to $4.6 billion for the nine months ended September 30, 2021. This reflects an increase of 10% on an underlying basis partly offset by a 4% decrease from the impact of foreign currency translation.

The increase in underlying expenses in the Consulting segment for the three and nine months ended September 30, 2022 is primarily due to increased headcount and incentive compensation. Expenses also reflect higher travel and entertainment costs compared to the corresponding periods in the prior year. Results for the three and nine months ended September 30, 2021 also included a $63 million reduction in the liability for a legacy JLT E&O, as well as recoveries under indemnities and insurance.

Corporate and Other

Corporate expenses were $88 million for the three months ended September 30, 2022, compared to $67 million for the three months ended September 30, 2021, and $234 million for the nine months ended September 30, 2022, compared to $196 million for the nine months ended September 30, 2021. Expenses for the three and nine months ended September 30, 2022, increased 31% and 20%, respectively, on an underlying basis primarily due to restructuring costs related to improving and streamlining the Company's global information technology and HR functions.

Interest

Interest expense was $118 million for the three months ended September 30, 2022, compared to $107 million for the three months ended September 30, 2021. Interest expense was $342 million for the nine months ended September 30, 2022, compared to $335 million for the nine months ended September 30, 2021. Interest expense for the three and nine months ended September 30, 2022 increased in both periods due to higher short term borrowings at higher interest rates compared to the corresponding periods in the prior year.

Investment (Loss) Income

The caption "Investment (loss) income" in the consolidated statements of income comprises realized and unrealized gains and losses from investments. It includes, when applicable, other than temporary declines in the value of securities, mark-to-market increases or decreases in equity investments with readily determinable fair values and equity method gains or losses on its investments in private equity funds. The Company's investments may include direct investments in insurance, consulting or other strategically linked companies and investments in private equity funds.

The Company recorded a net investment loss of $1 million and investment income of $27 million for the three and nine months ended September 30, 2022, respectively, compared to net investment income of $13 million and $43 million for the corresponding periods in the prior year. The decrease in 2022 is primarily driven by lower mark-to-market gains in the Company's private equity investments compared to the corresponding periods in the prior year. In the third quarter of 2022, the Company also recorded a net loss of $4 million from the sale of certain investments.

Income and Other Taxes

The Company's effective tax rate for the three months ended September 30, 2022 was 24.6%, compared with 24.2% for the corresponding quarter of 2021. The effective tax rates for the nine months ended September 30, 2022 and 2021 were 24.6% and 27.1%, respectively.

The tax rates in both periods reflect the impact of discrete tax matters such as excess tax benefits related to share-based compensation, enacted tax legislation, changes in uncertain tax positions, deferred tax adjustments and non-taxable adjustments related to contingent consideration for acquisitions. The rate in both periods also reflects tax benefits from planning that postponed the utilization of current year losses in the U.K. to a future year when the tax rate will be 25%.

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The excess tax benefit related to share-based payments is the most significant discrete item for the three and nine months ended September 30, 2022, reducing the effective tax rate by 0.9% and 1.2%, respectively. The reduction for both the three and nine months ended September 30, 2021 was 0.9%.

The effective tax rate for the nine months ended September 30, 2021, reflects the charge related to re-measuring the Company’s U.K. deferred tax assets and liabilities upon the enactment of legislation increasing the U.K. corporate income tax rate from 19% to 25%, effective April 1, 2023. The Company recorded a net charge of $100 million in the second quarter of 2021, which reflects the re-measurement of the Company's U.K. deferred tax assets and liabilities upon enactment of the legislation. The re-measurement of the Company’s U.K. deferred tax assets and liabilities was the most significant discrete item in the prior year, increasing the Company’s effective tax rate by 3.1% for the nine month period ended September 30, 2021.

The effective tax rate may vary significantly from period to period. The effective tax rate is sensitive to the geographic mix and repatriation of the Company's earnings, which may result in higher or lower effective tax rates. Thus, a shift in the mix of profits among jurisdictions, or changes in the Company's repatriation strategy to access offshore cash, can affect the effective tax rate.

In addition, losses in certain jurisdictions cannot be offset by earnings from other operations, and may require valuation allowances that affect the rate in a particular period, depending on estimates of the value of associated deferred tax assets which can be realized. A valuation allowance was recorded to reduce deferred tax assets to the amount that the Company believes is more likely than not to be realized. The effective tax rate is also sensitive to changes in unrecognized tax benefits, including the impact of settled tax audits and expired statutes of limitations.

On August 16, 2022, the Inflation Reduction Act of 2022 ("IRA") was enacted into law. The Company is currently evaluating the provisions of the new legislation, the most significant of which are the corporate alternative minimum tax and the share repurchase tax. The Company does not expect the IRA to have a significant impact on its financial results of operations when it becomes effective on January 1, 2023.

Changes in tax laws, rulings, policies or related legal and regulatory interpretations occur frequently and may have a significant favorable or adverse impact on our effective tax rate.

As a U.S. domiciled parent holding company, the Company is the issuer of essentially all of the external indebtedness and incurs the related interest expense in the U.S. The Company’s interest expense deductions are not currently limited. Further, most senior executive and oversight functions are conducted in the U.S. and the associated costs are incurred primarily in the U.S. Some of these expenses may not be deductible in the U.S., which may impact the effective tax rate.

The quasi-territorial U.S. tax regime provides an opportunity for the Company to repatriate foreign earnings more tax efficiently and there is less incentive for permanent reinvestment of these earnings. However, permanent reinvestment continues to be a component of the Company’s global capital strategy. The Company continues to evaluate its global investment and repatriation strategy in light of its capital requirements, considering the treatment of future earnings under the quasi-territorial tax regime.

The Company has established liabilities for uncertain tax positions in relation to potential assessments in the jurisdictions in which it operates. The Company believes the resolution of tax matters will not have a material effect on the consolidated financial position of the Company, although a resolution of tax matters could have a material impact on the Company's net income or cash flows and on its effective tax rate in a particular future period. It is reasonably possible that the total amount of unrecognized tax benefits will decrease between zero and approximately $48 million within the next twelve months due to audit settlements and statute of limitations expirations.

The Coronavirus Aid, Relief and Economic Security Act (the "CARES Act") was signed into law on March 27, 2020. The CARES Act provided over $2 trillion in economic relief to individuals, governmental agencies and companies, to deal with the public health and economic impacts of COVID-19. Pursuant to the CARES Act, the Company deferred payroll taxes due from March 27, 2020 through December 31, 2020 and paid 50% in 2021 and expect to pay the remaining 50% at the end of 2022.

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Liquidity and Capital Resources

The Company is organized as a legal entity separate and distinct from its operating subsidiaries. As the Company does not have significant operations of its own, the Company is dependent upon dividends and other payments from its operating subsidiaries to pay principal and interest on its outstanding debt obligations, pay dividends to stockholders, repurchase its shares and pay corporate expenses. The Company can also provide financial support to its operating subsidiaries for acquisitions, investments and certain parts of their business that require liquidity, such as the capital markets business of Guy Carpenter. Other sources of liquidity include borrowing facilities discussed in financing cash flows.

The Company derives a significant portion of its revenue and operating profit from operating subsidiaries located outside of the U.S. Funds from those operating subsidiaries are regularly repatriated to the U.S. out of annual earnings. At September 30, 2022, the Company had approximately $768 million of cash and cash equivalents in its foreign operations, which includes $271 million of operating funds required to be maintained for regulatory requirements or as collateral under certain captive insurance arrangements. The Company expects to continue its practice of repatriating available funds from its non-U.S. operating subsidiaries out of current annual earnings. Where appropriate, a portion of the current year earnings will continue to be permanently reinvested.

During the first nine months of 2022, the Company recorded foreign currency translation adjustments which decreased net equity by $1.6 billion. Continued strengthening of the U.S. dollar against foreign currencies would further decrease the translated U.S. dollar value of the Company’s net investments in its non-U.S. subsidiaries, as well as the translated U.S. dollar value of cash repatriations from those subsidiaries.

Cash and cash equivalents on our consolidated balance sheets includes funds available for general corporate purposes. Funds held on behalf of clients in a fiduciary capacity are segregated and shown separately in the consolidated balance sheets as an offset to fiduciary liabilities. Fiduciary funds cannot be used for general corporate purposes, and should not be considered as a source of liquidity for the Company.

Operating Cash Flows

The Company provided $2.0 billion of cash from operations for the nine months ended September 30, 2022, compared to $2.1 billion provided by operations in the first nine months of 2021. These amounts reflect the net income of the Company during those periods, excluding gains or losses from investments, adjusted for non-cash charges and changes in working capital which relate primarily to the timing of payments of accrued liabilities or receipts of assets and pension plan contributions. The Company paid $124 million related to its restructuring activities for both the nine months ended September 30, 2022 and 2021.

Pension Related Items

Contributions

The Company's policy for funding its tax-qualified defined benefit plans is to contribute amounts at least sufficient to meet the funding requirements set forth in accordance with applicable law. During the first nine months of 2022, the Company contributed $23 million to its U.S. defined benefit pension plans and $118 million to its non-U.S. defined benefit pension plans. For the first nine months of 2021, the Company contributed $27 million to its U.S. defined benefit pension plans and $63 million to its non-U.S. defined benefit pension plans.

In the U.S., contributions to the tax-qualified defined benefit plans are based on ERISA guidelines and the Company generally expects to maintain a funded status of 80% or more of the liability determined in accordance with the ERISA guidelines. During the first nine months of 2022, the Company made $23 million of contributions to its non-qualified plans and expects to fund approximately an additional $8 million over the remainder of 2022. The Company is not required to make any contributions to its U.S. qualified plans in 2022.

Outside the U.S., the Company has a large number of non-U.S. defined benefit pension plans, the largest of which are in the U.K., which comprise approximately 81% of non-U.S. plan assets at December 31, 2021. Contribution rates for non-U.S. plans are generally based on local funding practices and statutory requirements, which may differ significantly from measurements under U.S. GAAP.

The Company contributed $104 million to its U.K. plans (including the JLT section) for the first nine months of 2022. The Company contributions to its U.K. plans (including the JLT section) for the remainder of 2022 are expected to be approximately $12 million.

In the U.K., the assumptions used to determine pension contributions are the result of legally-prescribed negotiations between the Company and the plans' trustee that typically occur every three years in conjunction with the actuarial valuation of the plans. Currently, this results in a lower funded status compared to U.S. GAAP and may result in contributions irrespective of the U.S. GAAP funded status.

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During 2021, the JLT Pension Scheme was merged into the MMC U.K. Pension Fund with a new segregated JLT section created. The Company made deficit contributions of $97 million to the JLT section in the first nine months of 2022, and is expected to make $9 million of contributions in the remainder of 2022. The funding level of the JLT section will be reassessed during 2022 to determine contributions in 2023 and onwards.

For the Marsh McLennan U.K. Pension Fund, excluding the JLT section, an agreement was reached with the trustee in the fourth quarter of 2019 based on the surplus funding position at December 31, 2018. In accordance with the agreement, no deficit funding is required until 2023. The funding level will be re-assessed during 2022 as part of the December 31, 2021 actuarial valuation to determine if contributions are required in 2023. As part of a long term strategy which depends on having greater influence over asset allocation and overall investment decisions, in November 2019, the Company renewed its agreement to support annual deficit contributions by the U.K. operating companies under certain circumstances, up to £450 million over a seven-year period.

The Company expects to fund an additional $20 million to its non-U.S. defined benefit plans over the remainder of 2022, comprising approximately $12 million to the U.K. plans and $8 million to plans outside of the U.K.

Financing Cash Flows

Net cash provided by financing activities was $28 million for the nine months ended September 30, 2022, compared with $127 million used by financing activities for the same period in 2021.

Credit Facilities

The Company has a multi-currency unsecured $2.8 billion five-year revolving credit facility (the "Credit Facility"). The interest rate on the Credit Facility is based on LIBOR plus a fixed margin which varies with the Company’s credit ratings. The Credit Facility expires in April 2026, and requires the Company to maintain certain coverage and leverage ratios which are tested quarterly. The Credit Facility includes provisions for determining a LIBOR successor rate in the event LIBOR reference rates are no longer available or in certain other circumstances which are determined to make using an alternative rate desirable. As of September 30, 2022, the Company had no borrowings under this facility.

On May 31, 2022, the Company secured a $250 million uncommitted revolving credit facility. The facility expires in May 2023, and has similar coverage and leverage ratios as the Credit Facility. The Company had no borrowings outstanding under this facility at September 30, 2022.

The Company also maintains other credit facilities, guarantees and letters of credit with various banks, aggregating $507 million at September 30, 2022, and $508 million at December 31, 2021. There were no outstanding borrowings under these facilities at September 30, 2022 and December 31, 2021.

Debt

On April 9, 2021, the Company increased its short-term commercial paper financing program to $2.0 billion from $1.5 billion. The Company had $600 million of commercial paper outstanding at September 30, 2022, at an effective interest rate of 3.39%.

On April 15, 2021, the Company repaid $500 million of senior notes maturing in July 2021.

In December 2021, the Company issued $400 million of 2.375% senior notes due 2031 and $350 million of 2.90% senior notes due 2051. The Company used the net proceeds from these issuances for general corporate purposes, and repaid $500 million of 2.75% senior notes with an original maturity date of January 2022 in December 2021.

The Company's senior debt is currently rated A- by Standard & Poor's ("S&P") and Baa1 by Moody's. The Company's short-term debt is currently rated A-2 by S&P and P-2 by Moody's. The Company carries a Stable outlook with both S&P and Moody's.

Share Repurchases

On March 23, 2022, the Board of Directors of the Company authorized an additional $5 billion in share repurchases. This is in addition to the Company's existing share repurchase program, which had approximately $1.3 billion of remaining authorization as of December 31, 2021. During the first nine months of 2022, the Company repurchased 10.1 million shares of its common stock for $1.6 billion. As of September 30, 2022, the Company remained authorized to repurchase up to approximately $4.7 billion in shares of its common stock. There is no time limit on the authorization.

During the first nine months of 2021, the Company repurchased 5.3 million shares of its common stock for total consideration of approximately $734 million.

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Dividends

The Company paid dividends on its common shares of $840 million ($1.66 per share) during the first nine months of 2022, as compared with $750 million ($1.465 per share) during the first nine months of 2021.

In September 2022, the Board of Directors of the Company declared a quarterly dividend of $0.590 per share on outstanding common stock, payable on November 15, 2022, to stockholders of record on October 7, 2022.

In July 2022, the Board of Directors of the Company increased the quarterly dividend by 10% from $0.535 to $0.590 per share paid in the third quarter of 2022.

Contingent and Deferred Payments Related to Acquisitions

The classification of contingent consideration in the consolidated statements of cash flows is dependent upon whether the receipt, payment, or adjustment was part of the initial liability established on the acquisition date (financing) or an adjustment to the acquisition date liability (operating).

The following amounts are included in the consolidated statements of cash flows as operating and financing activities:

For the Nine Months Ended September 30,
(In millions)	2022		2021
Operating:
Contingent consideration payments for prior year acquisitions	$	(38)	$	(46)
Receipt of contingent consideration for dispositions	—		19
Acquisition/disposition related net charges for adjustments	38		11
Adjustments and payments related to contingent consideration	$	—	$	(16)
Financing:
Contingent consideration for prior year acquisitions	$	(28)	$	(26)
Deferred consideration related to prior year acquisitions	(116)		(84)
Payments of deferred and contingent consideration for acquisitions	$	(144)	$	(110)
Receipt of contingent consideration for dispositions	$	3	$	71

Remaining estimated future contingent and deferred consideration payments of $328 million and $91 million, respectively, for acquisitions completed in the first nine months of 2022, and in prior years are recorded in accounts payable and accrued liabilities or other liabilities in the consolidated balance sheet at September 30, 2022.

Derivatives

Net Investment Hedge

The Company has investments in various subsidiaries with Euro functional currencies. As a result, the Company is exposed to the risk of fluctuations between the Euro and U.S. dollar exchange rates. As part of its risk management program, the Company issued €1.1 billion Senior Notes, and designated the debt instruments as a net investment hedge of its Euro denominated subsidiaries. The hedge is re-assessed each quarter to confirm that the designated equity balance at the beginning of each period continues to equal or exceed 80% of the outstanding balance of the Euro debt instrument and that all the critical terms of the hedging instrument and the hedged net investment continue to match. If the hedge is highly effective, the change in the debt balance related to foreign exchange fluctuations is recorded in accumulated other comprehensive loss in the consolidated balance sheets.

The U.S. dollar value of the Euro notes decreased by $179 million through September 30, 2022, related to the change in foreign exchange rates. The Company concluded that the hedge was highly effective and recorded a decrease to accumulated other comprehensive loss for the nine months ended September 30, 2022.

Fiduciary Liabilities

Since cash and cash equivalents held in a fiduciary capacity are not available for corporate use, they are shown in the consolidated balance sheets as an offset to fiduciary liabilities. Financing cash flows reflect an increase of $2.1 billion and $1.9 billion for the nine months ended September 30, 2022 and 2021, respectively, related to the increase in fiduciary liabilities.

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Investing Cash Flows

Net cash used for investing activities amounted to $363 million for the first nine months of 2022, compared with $572 million used for investing activities for the corresponding period in 2021.

The Company paid $213 million and $384 million, net of cash, cash equivalents and cash and cash equivalents held in a fiduciary capacity acquired, for acquisitions it made during the first nine months of 2022 and 2021, respectively.

During the first nine months of 2022, the Company sold certain business, primarily Mercer's U.S. affinity business, for cash proceeds of approximately $147 million. In the first nine months of 2021, the Company sold certain of its businesses, primarily in the U.S. and U.K., for cash proceeds of approximately $84 million.

In the third quarter of 2022, the Company sold certain investments, primarily the investment in the common stock of Alexander Forbes ("AF"), for cash proceeds of approximately $62 million.

The Company's additions to fixed assets and capitalized software, which amounted to $367 million in the first nine months of 2022, and $268 million in the first nine months of 2021, primarily related to computer equipment purchases, the refurbishing and modernizing of office facilities, and software development costs.

The Company has commitments for potential future investments of approximately $176 million in 10 private equity funds that invest primarily in financial services companies, including a $100 million commitment to invest in a private equity fund entered into on April 1, 2022.

Commitments and Obligations

The following sets forth the Company’s future contractual obligations by the types identified in the table as of September 30, 2022:

(In millions)	Payment due by Period
Contractual Obligations	Total		Within 1 Year		1-3 Years		4-5 Years		After 5 Years
Commercial paper	$	600	$	600	$	—	$	—	$	—
Current portion of long-term debt	367		367		—		—		—
Long-term debt	10,461		—		2,387		1,175		6,899
Interest on long-term debt	4,830		402		687		570		3,171
Net operating leases	2,161		348		591		481		741
Service agreements	168		88		62		16		2
Other long-term obligations	464		240		214		6		4
Total	$	19,051	$	2,045	$	3,941	$	2,248	$	10,817

The above table does not include the liability for unrecognized tax benefits of $107 million as the Company is unable to reasonably predict the timing of settlement of these liabilities, other than approximately $35 million that may become payable within one year.

The table also does not include the remaining transitional tax payments related to the Tax Cuts and Jobs Act ("the TCJA") of $62 million, which will be paid in installments beginning in 2023 through 2026.

Management’s Discussion of Critical Accounting Policies and Estimates

The Company’s discussion of critical accounting policies and estimates that place the most significant demands on management’s judgment and requires management to make significant estimates about matters that are inherently uncertain are discussed in the MD&A in the 2021 Form 10-K.

New Accounting Guidance

Note 19, New Accounting Guidance, in the notes to the consolidated financial statements in this report contains a discussion of recently issued accounting guidance and their impact or potential future impact on the Company’s financial results, if determinable.

49

Item 3.Quantitative and Qualitative Disclosures About Market Risk.

Market Risk and Credit Risk

Certain of the Company’s revenues, expenses, assets and liabilities are exposed to the impact of interest rate changes and fluctuations in foreign currency exchange rates and equity markets.

Interest Rate Risk and Credit Risk

Interest income generated from the Company's cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity will vary with the general level of interest rates.

The Company had the following investments subject to variable interest rates:

(In millions)	September 30, 2022
Cash and cash equivalents	$	802
Cash and cash equivalents held in a fiduciary capacity	$	10,608

Based on the above balances, if short-term interest rates increased or decreased by 10%, or 15 basis points, over the course of the year, annual interest income, including interest earned on cash and cash equivalents held in a fiduciary capacity, would increase or decrease by approximately $4 million.

Changes in interest rates can also affect the discount rate and assumed rate of return on plan assets, two of the assumptions among several others used to measure net periodic pension expense. The assumptions used to measure plan assets and liabilities are typically assessed at the end of each year, and determine the expense for the subsequent year. Assumptions used to determine net periodic expense for 2022 are discussed in Note 8, Retirement Benefits, in the notes to the consolidated financial statements included in our most recently filed Annual Report on Form 10-K. For a discussion on pension expense sensitivity to changes in these rates, see the "Management’s Discussion and Analysis of Financial Condition and Results of Operations - Management’s Discussion of Critical Accounting Policies and Estimates - Retirement Benefits" section of our most recently filed Annual Report on Form 10-K.

In addition to interest rate risk, our cash investments and fiduciary cash investments are subject to potential loss of value due to counter-party credit risk. To minimize this risk, the Company and its subsidiaries invest pursuant to a Board approved investment policy. The policy mandates the preservation of principal and liquidity and requires broad diversification with counter-party limits assigned based primarily on credit rating and type of investment. The Company carefully monitors its cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity, and will further restrict the portfolio as appropriate to market conditions. The majority of cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity are invested in short-term bank deposits and liquid money market funds.

Foreign Currency Risk

The translated values of revenue and expense from the Company’s international operations are subject to fluctuations due to changes in currency exchange rates. The non-U.S. based revenue that is exposed to foreign exchange fluctuations is approximately 52% of total revenue. We periodically use forward contracts and options to limit foreign currency exchange rate exposure on net income and cash flows for specific, clearly defined transactions arising in the ordinary course of business. Although the Company has significant revenue generated in foreign locations which is subject to foreign exchange rate fluctuations, in most cases both the foreign currency revenue and expense are in the functional currency of the foreign location. As such, under normal circumstances, the U.S. dollar translation of both the revenue and expense, as well as the potentially offsetting movements of various currencies against the U.S. dollar, generally tend to mitigate the impact on net operating income of foreign currency risk.

However, there have been periods where the impact was not mitigated due to external market factors, and external macroeconomic events may result in greater foreign exchange rate fluctuations in the future. If foreign exchange rates of major currencies (Euro, Sterling, Australian dollar and Canadian dollar) moved 10% in the same direction against the U.S. dollar that held constant over the course of the year, the Company estimates that full year net operating income would increase or decrease by approximately $65 million. The Company has exposure to approximately 85 foreign currencies overall. If exchange rates at September 30, 2022, hold constant for the rest of 2022, the Company estimates the year-over-year impact from conversion of foreign currency earnings will decrease full year net operating income by approximately $70 million.

In Continental Europe, the largest amount of revenue from renewals for the Risk and Insurance Services segment occurs in the first quarter.

50

Equity Price Risk

The Company holds investments in both public and private companies as well as private equity funds, including investments of approximately $17 million that are valued using readily determinable fair values and approximately $38 million of investments without readily determinable fair values. The Company also has investments of approximately $222 million that are accounted for using the equity method. The investments are subject to risk of decline in market value, which, if determined to be other than temporary for assets without readily determinable fair values, could result in realized impairment losses. The Company periodically reviews the carrying value of such investments to determine if any valuation adjustments are appropriate under the applicable accounting pronouncements.

Other

A number of lawsuits and regulatory proceedings are pending. See Note 17, Claims, Lawsuits and Other Contingencies, in the notes to the consolidated financial statements included in this report.

Item 4. Controls & Procedures.

a. Evaluation of Disclosure Controls and Procedures

Based on their evaluation, as of the end of the period covered by this report, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) or 15d-15(e) under the Securities Exchange Act of 1934) are effective.

b. Changes in Internal Control

There were no other changes in the Company’s internal control over financial reporting identified in connection with the evaluation required by Rules 13a-15(d) or 15d-15(d) under the Securities Exchange Act of 1934 that occurred during the Company’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

51

PART II. OTHER INFORMATION

Item 1.     Legal Proceedings.

The Company and its subsidiaries are also party to a variety of other legal, administrative, regulatory and government proceedings, claims and inquiries arising in the normal course of business. Additional information regarding certain legal proceedings and related matters as set forth in Note 17, Claims, Lawsuits and Other Contingencies, in the notes to the consolidated financial statements provided in Part I of this report is incorporated herein by reference.

Item 1A. Risk Factors.

The Company and its subsidiaries face a number of risks and uncertainties. In addition to the other information in this report and our other filings with the SEC, readers should consider carefully the risk factors discussed in "Part I, Item 1A. Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2021.

If any of the risks described in our Annual Report on Form 10-K or such other risks actually occur, our business, results of operations or financial condition could be materially adversely affected.

Item 2.      Unregistered Sales of Equity Securities and Use of Proceeds.

Issuer Repurchases of Equity Securities

On March 23, 2022, the Board of Directors of the Company authorized an additional $5 billion in share repurchases. This is in addition to the Company's existing share repurchase program, which had approximately $1.3 billion of remaining authorization as of December 31, 2021. The Company repurchased approximately 3.1 million shares of its common stock for $500 million during the third quarter of 2022. As of September 30, 2022, the Company remained authorized to repurchase up to approximately $4.7 billion in shares of its common stock. There is no time limit on the authorization.

Period	(a) Total Number of Shares (or Units) Purchased	(b) Average Price Paid per Share (or Unit)		(c) Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs	(d) Maximum Number (or Approximate Dollar Value) of Shares (or Units) that May Yet Be Purchased Under the Plans or Programs
July 1-31, 2022	899,268	$	155.4021	899,268	$	5,024,245,716
August 1-31, 2022	1,240,742	$	167.6402	1,240,742	$	4,816,247,533
September 1-30, 2022	953,065	$	159.7511	953,065	$	4,663,994,320
Total	3,093,075	$	161.6513	3,093,075	$	4,663,994,320

Item 3.      Defaults Upon Senior Securities.

None.

Item 4.      Mine Safety Disclosure.

Not Applicable.

Item 5.      Other Information.

None.

Item 6.      Exhibits.

See the Exhibit Index immediately following the signature page of this report, which is incorporated herein by reference.

52

SIGNATURES

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.

Date:	October 20, 2022	/s/ Mark C. McGivney
		Mark C. McGivney
		Chief Financial Officer
Date:	October 20, 2022	/s/ Stacy M. Mills
		Stacy M. Mills
		Vice President & Controller
		(Chief Accounting Officer)

53

EXHIBIT INDEX

Exhibit No.	Exhibit Name
10.1	Letter Agreement Amendment, dated September 23, 2022, between Marsh & McLennan Companies, Inc. and Daniel S. Glaser (incorporated by reference to the Company’s Current Report on Form 8-K dated September 23, 2022)
10.2	Letter Agreement, effective as of September 22, 2022, between Marsh & McLennan Companies, Inc. and Mark C. McGivney
31.1	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer
31.2	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer
32.1	Section 1350 Certifications
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

54

EX-10.2

Daniel S. Glaser

President and Chief Executive Officer

Marsh McLennan

1166 Avenue of the Americas

New York, NY 10036

T +1 212 345 5000

www.mmc.com

September 22, 2022

Subject: Terms of Employment

Dear Mark,

This third amendment to the Letter Agreement, dated September 17, 2015, between you and Marsh & McLennan Companies, Inc. as subsequently amended on January 17, 2018 and February 19, 2019 (together, the “Letter Agreement”), revises the terms and conditions of your employment. The Letter Agreement will continue to govern your employment except as specified below:

1.Exhibit A to the Letter Agreement shall be deleted and replaced in its entirety with the attached Exhibit A.

The terms of this amendment are effective as of September 22, 2022. Please acknowledge your agreement with the terms of the Letter Agreement, as further amended by this third amendment, by signing and dating this and the enclosed copy and returning one to me.

Sincerely,

/s/ Daniel S. Glaser

Daniel S. Glaser

President and Chief Executive Officer

Marsh McLennan

Accepted and Agreed:

/s/ Mark C. McGivney

(Signature)

9/22/22

(Date)

Page 2

September 22, 2022

Mark C. McGivney

Exhibit A

Board or Committee Memberships	None
Annual Base Salary	$800,000 effective as of April 1, 2019.
Annual Target Bonus Opportunity	Bonus awards are discretionary. Target bonus of $1,600,000 commencing with the 2022 performance year (awarded in February 2023). Actual bonus may range from 0% - 200% of target, based on achievement of individual and Marsh McLennan performance objectives, as Marsh McLennan may establish from time to time.
Annual Target Long-Term Incentive Opportunity	Long-term incentive awards are discretionary. Target award value of $2,600,000, commencing with the award made in 2019.

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Daniel S. Glaser, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Marsh & McLennan Companies, Inc. (the “registrant”);

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(s) 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(s) 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 20, 2022	/s/ Daniel S. Glaser
		Daniel S. Glaser
		President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Mark C. McGivney, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Marsh & McLennan Companies, Inc. (the “registrant”);

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(s) 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(s) 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 20, 2022	/s/ Mark C. McGivney
		Mark C. McGivney
		Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer and Chief Financial Officer

The certification set forth below is being submitted in connection with the Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2022 of Marsh & McLennan Companies, Inc. (the "Report") for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and Section 1350 of Chapter 63 of Title 18 of the United States Code.

Daniel S. Glaser, the President and Chief Executive Officer, and Mark C. McGivney, Chief Financial Officer, of Marsh & McLennan Companies, Inc. each certifies that, to the best of his knowledge:

1.the Report fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and

2.the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Marsh & McLennan Companies, Inc.

Date:	October 20, 2022	/s/ Daniel S. Glaser
		Daniel S. Glaser
		President and Chief Executive Officer

Date:	October 20, 2022	/s/ Mark C. McGivney
		Mark C. McGivney
		Chief Financial Officer

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 17, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity Registrant Name	Marsh & McLennan Companies, Inc.
Entity Address, Address Line One	1166 Avenue of the Americas
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10036
City Area Code	212
Local Phone Number	345-5000
Entity File Number	1-5998
Entity Address, State or Province	DE
Entity Tax Identification Number	36-2668272
Title of 12(b) Security	Common Stock, par value $1.00 per share
Trading Symbol	MMC
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		496,009,506
Entity Central Index Key	0000062709
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false
New York Stock Exchange
Entity Information [Line Items]
Security Exchange Name	NYSE
Chicago Stock Exchange
Entity Information [Line Items]
Security Exchange Name	CHX

XML

Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenue	$ 4,770	$ 4,583	$ 15,698	$ 14,683
Expense:
Compensation and benefits	2,923	2,853	9,033	8,520
Other operating expenses	1,056	990	3,065	2,837
Operating expenses	3,979	3,843	12,098	11,357
Operating income	791	740	3,600	3,326
Other net benefit credits	57	69	178	211
Interest income	4	1	6	2
Interest expense	(118)	(107)	(342)	(335)
Investment (loss) income	(1)	13	27	43
Income before income taxes	733	716	3,469	3,247
Income tax expense	181	174	853	880
Net income before non-controlling interests	552	542	2,616	2,367
Less: Net income attributable to non-controlling interests	6	5	32	27
Net income attributable to the Company	$ 546	$ 537	$ 2,584	$ 2,340
Net income per share attributable to the Company:
Basic (usd per share)	$ 1.10	$ 1.06	$ 5.16	$ 4.61
Diluted (usd per share)	$ 1.08	$ 1.05	$ 5.11	$ 4.56
Average number of shares outstanding:
Basic (in shares)	498	506	501	508
Diluted (in shares)	503	513	506	513
Shares outstanding (in shares)	497	505	497	505

XML

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income before non-controlling interests	$ 552	$ 542	$ 2,616	$ 2,367
Other comprehensive (loss) income, before tax:
Foreign currency translation adjustments	(895)	(346)	(1,928)	(413)
Gain related to pension/post-retirement plans	281	204	603	234
Other comprehensive loss, before tax	(614)	(142)	(1,325)	(179)
Income tax expense on other comprehensive loss	71	50	148	56
Other comprehensive loss, net of tax	(685)	(192)	(1,473)	(235)
Comprehensive (loss) income	(133)	350	1,143	2,132
Less: comprehensive income attributable to non-controlling interest	6	5	32	27
Comprehensive (loss) income attributable to the Company	$ (139)	$ 345	$ 1,111	$ 2,105

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 802	$ 1,752
Receivables
Commissions and fees	5,312	5,093
Advanced premiums and claims	144	136
Other	527	523
Gross receivables	5,983	5,752
Less-allowance for credit losses	(164)	(166)
Net receivables	5,819	5,586
Other current assets	953	926
Total current assets	7,574	8,264
Goodwill	15,576	16,317
Other intangible assets	2,403	2,810
Fixed assets (net of accumulated depreciation and amortization of $1,650 at September 30, 2022 and $1,589 at December 31, 2021)	865	847
Pension related assets	2,074	2,270
Right of use assets	1,615	1,868
Deferred tax assets	533	551
Other assets	1,383	1,461
Total assets	32,023	34,388
Current liabilities:
Short-term debt	967	17
Accounts payable and accrued liabilities	2,903	3,165
Accrued compensation and employee benefits	2,396	2,942
Current lease liabilities	298	332
Accrued income taxes	432	198
Dividends payable	296	0
Total current liabilities	7,292	6,654
Fiduciary liabilities	10,608	9,622
Less – cash and cash equivalents held in a fiduciary capacity	(10,608)	(9,622)
Net fiduciary liabilities	0	0
Long-term debt	10,399	10,933
Pension, post-retirement and post-employment benefits	1,309	1,632
Long-term lease liabilities	1,620	1,880
Liabilities for errors and omissions	331	355
Other liabilities	1,281	1,712
Commitments and contingencies	0	0
Equity:
Preferred stock, $1 par value, authorized 6,000,000 shares, none issued	0	0
Common stock, $1 par value, authorized 1,600,000,000 shares, issued 560,641,640 shares at September 30, 2022 and December 31, 2021	561	561
Additional paid-in capital	1,111	1,112
Retained earnings	19,837	18,389
Accumulated other comprehensive loss	(6,048)	(4,575)
Non-controlling interests	226	213
Stockholders' equity before treasury stock	15,687	15,700
Less – treasury shares, at cost, 64,102,660 shares at September 30, 2022 and 57,105,619 shares at December 31, 2021	(5,896)	(4,478)
Total equity	9,791	11,222
Total liabilities and stockholders' equity	$ 32,023	$ 34,388

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Fixed assets, accumulated depreciation and amortization	$ 1,650	$ 1,589
Preferred stock, par value (usd per share)	$ 1	$ 1
Preferred stock, shares authorized	6,000,000	6,000,000
Preferred stock, shares issued	0	0
Common stock, par value (usd per share)	$ 1	$ 1
Common stock, shares authorized	1,600,000,000	1,600,000,000
Common stock, shares issued	560,641,640	560,641,640
Treasury shares, shares	64,102,660	57,105,619

XML

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating cash flows:
Net income before non-controlling interests	$ 2,616	$ 2,367
Adjustments to reconcile net income provided by operations:
Depreciation and amortization of fixed assets and capitalized software	259	291
Amortization of intangible assets	258	278
Non-cash lease expense	223	241
Adjustments and payments related to contingent consideration assets and liabilities	0	(16)
Deconsolidation of Russian businesses	39	0
Net gain on investments	(27)	(43)
Net gain on disposition of assets	(112)	(37)
Share-based compensation expense	283	263
Changes in assets and liabilities:
Net receivables	(745)	(604)
Other assets	(14)	(276)
Accrued compensation and employee benefits	(451)	(20)
Provision for taxes, net of payments and refunds	156	196
Contributions to pension and other benefit plans in excess of current year credit	(306)	(282)
Other liabilities	28	(22)
Operating lease liabilities	(244)	(262)
Net cash provided by operations	1,963	2,074
Financing cash flows:
Purchase of treasury shares	(1,600)	(734)
Net proceeds from issuance of commercial paper	600	0
Repayments of debt	(14)	(512)
Shares withheld for taxes on vested units – treasury shares	(194)	(99)
Issuance of common stock from treasury shares	89	115
Payments of deferred and contingent consideration for acquisitions	(144)	(110)
Receipts of contingent consideration for dispositions	3	71
Distributions of non-controlling interests	(20)	(27)
Dividends paid	(840)	(750)
Change in fiduciary liabilities	2,148	1,919
Net cash provided by (used for) financing activities	28	(127)
Investing cash flows:
Capital expenditures	(367)	(268)
Purchases of long term investments	(19)	(28)
Sales of long term investments	84	30
Dispositions	138	84
Acquisitions, net of cash and cash held in a fiduciary capacity acquired	(213)	(384)
Other, net	14	(6)
Net cash used for investing activities	(363)	(572)
Effect of exchange rate changes on cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity	(1,592)	(243)
Increase in cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity	36	1,132
Cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity at beginning of period	11,374	10,674
Cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity at end of period	11,410	11,806
Cash and cash equivalents	802	1,398
Cash and cash equivalents held in a fiduciary capacity	10,608	10,408
Total cash, cash equivalents, and cash and cash equivalents held in a fiduciary capacity	$ 11,410	$ 11,806

XML

Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME	TREASURY SHARES	NON-CONTROLLING INTERESTS
Balance, beginning of period at Dec. 31, 2020		$ 561	$ 943	$ 16,272	$ (5,110)	$ (3,562)	$ 156
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			41
Issuance of shares under stock compensation plans and employee stock purchase plans			50			191
Net income attributable to the Company	$ 2,367			2,340			27
Dividend equivalents declared				(8)
Dividends declared				(1,015)
Other comprehensive (loss) income, net of tax	(235)				(235)
Purchase of treasury shares	(734)					(734)
Distributions and other changes							(29)
Balance, end of period at Sep. 30, 2021	$ 9,888	561	1,034	17,589	(5,345)	(4,105)	154
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 2.000
Balance, beginning of period at Jun. 30, 2021		561	945	17,597	(5,153)	(3,842)	156
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			89
Issuance of shares under stock compensation plans and employee stock purchase plans			0			37
Net income attributable to the Company	$ 542			537			5
Dividend equivalents declared				(2)
Dividends declared				(543)
Other comprehensive (loss) income, net of tax	(192)				(192)
Purchase of treasury shares						(300)
Distributions and other changes							(7)
Balance, end of period at Sep. 30, 2021	$ 9,888	561	1,034	17,589	(5,345)	(4,105)	154
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 1.070
Balance, beginning of period at Dec. 31, 2021	$ 11,222	561	1,112	18,389	(4,575)	(4,478)	213
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(80)
Issuance of shares under stock compensation plans and employee stock purchase plans			79			182
Net income attributable to the Company	2,616			2,584			32
Dividend equivalents declared				(10)
Dividends declared				(1,126)
Other comprehensive (loss) income, net of tax	(1,473)				(1,473)
Purchase of treasury shares	(1,600)					(1,600)
Distributions and other changes							(19)
Balance, end of period at Sep. 30, 2022	$ 9,791	561	1,111	19,837	(6,048)	(5,896)	226
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 2.250
Balance, beginning of period at Jun. 30, 2022		561	1,044	19,880	(5,363)	(5,429)	224
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			60
Issuance of shares under stock compensation plans and employee stock purchase plans			7			33
Net income attributable to the Company	$ 552			546			6
Dividend equivalents declared				(3)
Dividends declared				(586)
Other comprehensive (loss) income, net of tax	(685)				(685)
Purchase of treasury shares						(500)
Distributions and other changes							(4)
Balance, end of period at Sep. 30, 2022	$ 9,791	$ 561	$ 1,111	$ 19,837	$ (6,048)	$ (5,896)	$ 226
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 1.180

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Nature of Operations

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Nature of Operations

Nature of Operations

Marsh & McLennan Companies, Inc. (the "Company"), a global professional services firm, is organized based on the different services that it offers. Under this structure, the Company’s two business segments are Risk and Insurance Services and Consulting.

The Risk and Insurance Services segment ("RIS") provides risk management solutions (risk advice, risk transfer and risk control and mitigation) as well as insurance and reinsurance broking and services for businesses, public entities, insurance companies, associations, professional services organizations, and private clients. The Company conducts business in this segment through Marsh and Guy Carpenter. Marsh provides data-driven risk advisory services and solutions to commercial and consumer clients. Guy Carpenter develops advanced risk, reinsurance and capital strategies that help clients grow profitably and identify and capitalize on emerging opportunities.

The Company conducts business in its Consulting segment through Mercer and Oliver Wyman Group. Mercer delivers advice and solutions that help organizations create a dynamic world of work, shape retirement and investment outcomes, and unlock health and well being for a changing workforce. Oliver Wyman Group serves as critical strategic, economic and brand advisor to private sector and governmental clients.

Deconsolidation of Russia

On February 24, 2022, Russian forces launched a military invasion of Ukraine. In response, the United States, the European Union, United Kingdom and other governments have imposed significant economic sanctions on Russia, and Russia has responded with counter-sanctions. The war in Ukraine has disrupted international commerce and the global economy.

In the first quarter of 2022, the Company concluded that it did not meet the accounting criteria for control over its wholly-owned Russian businesses due to the evolving trade and economic sanctions, and recorded a loss of $52 million on the deconsolidation of the Russian businesses and other related charges.

In June 2022, the Company entered into a definitive agreement to exit its businesses in Russia and transfer ownership to local management pending regulatory approvals. Refer to Note 8, Acquisitions and Dispositions, for additional information on the deconsolidation of the Russian businesses.

The Company continues to monitor the ongoing situation and its potential impact on our business, financial condition, results of operations and cash flows.

Business Update related to COVID-19

For nearly three years, the COVID-19 pandemic has impacted businesses globally including in every geography in which the Company operates. Our businesses have remained resilient throughout the pandemic and demand for our advice and services remains strong. The ultimate extent of the impact of COVID-19 to the Company will depend on future developments that it is unable to predict.

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Principles of Consolidation and Other Matters

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Principles of Consolidation and Other Matters

Principles of Consolidation and Other Matters

The Company prepared the consolidated financial statements included herein pursuant to the rules and regulations of the Securities and Exchange Commission. For interim filings, certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been omitted pursuant to such rules and regulations. The Company believes that the information and disclosures presented are adequate to make such information and disclosures not misleading. These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 (the "2021 Form 10-K").

The financial information contained herein reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair presentation of the Company’s consolidated financial statements as of and for the nine months ended September 30, 2022 and 2021.

Estimates: The preparation of the consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expense during the reporting period.

On an ongoing basis, the Company evaluates its estimates, judgments and methodologies. The estimates are based on historical experience and on various other assumptions that the Company believes are reasonable.

Such matters include:

•estimates of revenue;

•impairment assessments and charges;

•recoverability of long-lived assets;

•liabilities for errors and omissions;

•deferred tax assets, uncertain tax positions and income tax expense;

•share-based and incentive compensation expense;

•the allowance for current expected credit losses on receivables;

•useful lives assigned to long-lived assets, and depreciation and amortization; and

•fair value estimates of contingent consideration receivable or payable related to acquisitions or dispositions.

The Company believes these estimates are reasonable based on information currently available at the time they are made. The Company also considered the potential impact of macroeconomic factors including inflation, the war in Ukraine and COVID-19 to its customer base in various industries and geographies. Insurance exposures subject to variable factors are subject to mid-term and end of term adjustments, as well as policy audits, which may reduce premiums and corresponding commissions. Estimates were updated based on internal and industry specific economic data. Actual results may differ from these estimates.

Cash and Cash Equivalents

Cash and cash equivalents primarily consist of certificates of deposit and time deposits, with original maturities of three months or less, and money market funds. The estimated fair value of the Company's cash and cash equivalents approximates their carrying value. The Company is required to maintain operating funds primarily related to regulatory requirements outside of the United States or as collateral under captive insurance arrangements. At September 30, 2022, the Company maintained $295 million compared to $303 million at December 31, 2021 related to these regulatory requirements.

Allowance for Credit Losses on Accounts Receivable

The Company’s policy for providing an allowance for credit losses on its accounts receivable is based on a combination of factors, including historical write-offs, aging of balances, and other qualitative and quantitative analyses. The charge related to expected credit losses was immaterial to the consolidated statements of income for the three and nine months ended September 30, 2022 and 2021, respectively.

Investments

The caption "Investment (loss) income" in the consolidated statements of income comprises realized and unrealized gains and losses from investments recognized in earnings. It includes, when applicable, other than temporary declines in the value of securities, mark-to-market increases or decreases in equity investments with readily determinable fair values and equity method gains or losses on the Company's investments in private equity funds.

The Company holds investments in certain private equity funds. Investments in private equity funds are accounted for in accordance with the equity method of accounting using a consistently applied three-month lag period adjusted for any known significant changes from the lag period to the reporting date of the Company. The underlying private equity funds follow investment company accounting, where investments within the fund are carried at fair value. Investment gains or losses for its proportionate share of the change in fair value of the funds are recorded in earnings. Investments accounted for in accordance with the equity method of accounting are included in "other assets" in the consolidated balance sheets.

The Company recorded a net investment loss of $1 million and investment income of $27 million for the three and nine months ended September 30, 2022, respectively, compared to investment income of $13 million and $43 million for the corresponding periods in the prior year. The decrease in 2022 reflects lower mark-to-market gains in the Company's private equity investments compared to the corresponding periods in the prior year. In the third quarter of 2022, the Company also recorded a net loss of $4 million from the sale of certain investments.

Income Taxes

The Company's effective tax rate for the three months ended September 30, 2022 was 24.6%, compared with 24.2% for the corresponding quarter of 2021. The effective tax rates for the nine months ended September 30, 2022 and 2021, were 24.6% and 27.1%, respectively.

The tax rates in both periods reflect the impact of discrete tax matters such as excess tax benefits related to share-based compensation, enacted tax legislation, changes in uncertain tax positions, deferred tax adjustments and

nontaxable adjustments related to contingent consideration for acquisitions. The rate in both periods also reflects tax benefits from planning that postponed the utilization of current year losses in the U.K. to a future year when the tax rate will be 25%.

The excess tax benefit related to share-based payments is the most significant discrete item for the three and nine months ended September 30, 2022, reducing the effective tax rate by 0.9% and 1.2%, respectively. The reduction for both the three and nine months ended September 30, 2021 was 0.9%.

The effective tax rate for the nine months ended September 30, 2021 reflects the charge related to re-measuring the Company’s U.K. deferred tax assets and liabilities upon the enactment of legislation increasing the U.K. corporate income tax rate from 19% to 25%, effective April 1, 2023. The Company recorded a net charge of $100 million in the second quarter of 2021, which reflected the re-measurement of the Company's U.K. deferred tax assets and liabilities upon enactment of the legislation. The re-measurement of the Company's U.K. deferred tax assets and liabilities was the most significant discrete item in the prior year, increasing the Company's effective tax rate by 3.1% for the nine month period ended September 30, 2021.

On August 16, 2022, the Inflation Reduction Act of 2022 ("IRA") was enacted into law. The Company is currently evaluating the provisions of the new legislation, the most significant of which are the corporate alternative minimum tax and the share repurchase tax. The Company does not expect the IRA to have a significant impact on its financial results of operations when it becomes effective on January 1, 2023.

The Company's tax rate reflects its income, statutory tax rates, and tax planning in the various jurisdictions in which it operates. Significant judgment is required in determining the annual effective tax rate and in evaluating uncertain tax positions.

Losses in one jurisdiction, generally, cannot offset earnings in another, and within certain jurisdictions profits and losses may not offset between entities. Consequently, losses in certain jurisdictions may require valuation allowances affecting the effective tax rate, depending on estimates of the realizability of associated deferred tax assets. The tax rate is also sensitive to changes in unrecognized tax benefits, including the impact of settled tax audits and expired statutes of limitations.

Changes in tax laws or tax rulings may have a significant impact on our effective tax rate. The Company reports a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in tax returns. The Company's gross unrecognized tax benefits were $107 million at September 30, 2022, and $94 million at December 31, 2021. It is reasonably possible that the total amount of unrecognized tax benefits will decrease between zero and approximately $48 million within the next twelve months due to settlements of audits and expirations of statutes of limitations.

Integration and Restructuring Charges

Severance and related costs are recognized based on amounts due under established severance plans or estimates of one-time benefits that will be provided. Typically, severance benefits are recognized when the impacted colleagues are notified of their expected termination and such termination is expected to occur within the legally required notification period. These costs are included in compensation and benefits in the consolidated statements of income.

Costs for real estate consolidation are recognized based on the type of cost, and the expected future use of the facility. For locations where the Company does not expect to sub-lease the property, the amortization of any Right-of-use ("ROU") asset is accelerated from the decision date to the cease use date. For locations where the Company expects to sub-lease the properties subsequent to its vacating the property, the ROU asset is reviewed for potential impairment at the earlier of the cease use date or the date a sub-lease is signed. To determine the amount of impairment, the fair value of the ROU asset is determined based on the present value of the estimated net cash flows related to the property. Contractual costs outside of the ROU asset are recognized based on the net present value of expected future cash outflows for which the Company will not receive any benefit. Such amounts are reliant on estimates of future sub-lease income to be received and future contractual costs to be incurred. These costs are included in other operating expenses in the consolidated statements of income.

Other costs related to integration and restructuring, such as moving, legal or consulting costs are recognized as incurred. These costs are included in other operating expenses in the consolidated statements of income.

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Revenue

9 Months Ended

Sep. 30, 2022

Revenue from Contract with Customer [Abstract]

Revenue

RevenueThe core principle of the revenue recognition guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.

To achieve this principle, the entity applies the following steps: identify the contract(s) with the customer, identify the performance obligations in the contract(s), determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the entity satisfies a performance obligation. A performance obligation is satisfied either at a “point in time” or “over time” depending on the nature of the product or service provided, and the specific terms of the contract with customers.

Other revenue included in the consolidated statements of income that is not from contracts with customers is less than 2% of total revenue and is not presented as a separate line item.

The Company's revenue policies are provided in more detail in Note 2, Revenue, in the Form 2021 10-K.

The following table disaggregates components of the Company's revenue:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Marsh:
EMEA	$	589	$	600	$	2,176	$	2,233
Asia Pacific	312		281		1,015		902
Latin America	118		105		340		298
Total International	1,019		986		3,531		3,433
U.S./Canada	1,451		1,366		4,263		3,894
Total Marsh	2,470		2,352		7,794		7,327
Guy Carpenter	328		314		1,849		1,697
Subtotal	2,798		2,666		9,643		9,024
Fiduciary interest income	40		4		57		12
Total Risk and Insurance Services	$	2,838	$	2,670	$	9,700	$	9,036
Mercer:
Wealth	$	561	$	613	$	1,775	$	1,861
Health	451		449		1,562		1,398
Career	272		253		679		618
Total Mercer	1,284		1,315		4,016		3,877
Oliver Wyman Group	667		610		2,029		1,813
Total Consulting	$	1,951	$	1,925	$	6,045	$	5,690

The Company recognizes commission revenue for a significant portion of its brokerage arrangements at a point in time on the effective date of the underlying policy. Commission revenue is estimated using historical information about the risks to be covered over the policy period, some of which are dependent on variable factors such as number of employees covered, covered payroll, airline passenger miles flown, shipped tonnage of marine cargo and others.

The following table provides contract assets and contract liabilities information from contracts with customers:

(In millions)	September 30, 2022		December 31, 2021
Contract assets	$	370	$	290
Contract liabilities	$	783	$	776

The Company records accounts receivable when the right to consideration is unconditional, subject only to the passage of time. Contract assets primarily relate to quota share reinsurance brokerage and contingent insurer revenue. The Company does not have the right to bill and collect revenue for quota share brokerage until the underlying policies written by the ceding insurer attach to the treaty. Estimated contingent insurer revenue related to the achievement of volume or loss ratio metrics cannot be billed or collected until all related policy placements are completed and the contingency is resolved. Contract assets are included in other current assets in the Company's consolidated balance sheets. Contract liabilities primarily relate to the advance consideration received from customers. Contract liabilities are included in current liabilities in the Company's consolidated balance sheets. Revenue recognized in the three and nine months ended September 30, 2022 that was included in the contract liability balance at the beginning of each of those periods was $75 million and $529 million, respectively, compared to revenue recognized of $131 million and $511 million for the corresponding periods in the prior year.

The amount of revenue recognized in the three and nine months ended September 30, 2022 from performance obligations satisfied in previous periods, mainly due to variable consideration from contracts with insurers, quota share business and consulting contracts previously considered constrained was $13 million and $74 million, respectively, and $6 million and $68 million for the corresponding periods in the prior year.

The Company applies the practical expedient and does not disclose the value of unsatisfied performance obligations for (1) contracts with original contract terms of one year or less and (2) contracts where the Company has the right to invoice for services performed. The revenue expected to be recognized in future periods during the non-cancellable term of existing contracts greater than one year that is related to performance obligations that are unsatisfied or partially satisfied at the end of the reporting period is approximately $234 million, primarily related to Mercer. The Company expects revenue in 2023, 2024, 2025, 2026 and 2027 and beyond of $98 million, $66 million, $39 million, $21 million and $10 million, respectively, related to these performance obligations.

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Fiduciary Assets and Liabilities

9 Months Ended

Sep. 30, 2022

Fiduciary Assets And Liabilities [Abstract]

Fiduciary Assets and Liabilities

Fiduciary Assets and Liabilities

In its capacity as an insurance broker or agent, generally the Company collects premiums from insureds and after deducting its commissions, remits the premiums to the respective insurance underwriters. The Company also collects claims or refunds from underwriters on behalf of insureds. Unremitted insurance premiums and claims proceeds are held by the Company in a fiduciary capacity. The Company's fiduciary assets primarily include bank or short term time deposits and liquid money market funds, and are classified as cash and cash equivalents. Risk and Insurance Services revenue includes interest on fiduciary funds of $40 million and $57 million for the three and nine months ended September 30, 2022, respectively, and $4 million and $12 million for the three and nine months ended September 30, 2021, respectively. Since cash and cash equivalents held in a fiduciary capacity are not available for corporate use, they are shown in the consolidated balance sheets as an offset to fiduciary liabilities.

Net uncollected premiums and claims and the related payables amounted to $12.5 billion at September 30, 2022, and $13.0 billion at December 31, 2021. The Company is not a principal to the contracts under which the right to receive premiums or the right to receive reimbursement of insured losses arises. Accordingly, net uncollected premiums and claims and the related payables are not assets and liabilities of the Company and are not included in the accompanying consolidated balance sheets.

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

The Company, through its Mercer subsidiary, manages assets in trusts or funds for which Mercer’s management or trustee fee is not considered a variable interest, since the fees are commensurate with the level of effort required to provide those services. Mercer is not the primary beneficiary of these trusts or funds. Mercer’s maximum exposure to loss of its interests is, therefore, limited to collection of its fees.

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Per Share Data

9 Months Ended

Sep. 30, 2022

Earnings Per Share [Abstract]

Per Share Data

Per Share Data

Basic net income per share attributable to the Company is calculated by dividing the after-tax income attributable to the Company by the weighted average number of outstanding shares of the Company’s common stock.

Diluted net income per share attributable to the Company is calculated by dividing the after-tax income attributable to the Company by the weighted average number of outstanding shares of the Company’s common stock, which have been adjusted for the dilutive effect of potentially issuable common shares.

Basic and Diluted EPS Calculation	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2022		2021		2022		2021
Net income before non-controlling interests	$	552	$	542	$	2,616	$	2,367
Less: Net income attributable to non-controlling interests	6		5		32		27
Net income attributable to the Company	$	546	$	537	$	2,584	$	2,340
Basic weighted average common shares outstanding	498		506		501		508
Dilutive effect of potentially issuable common shares	5		7		5		5
Diluted weighted average common shares outstanding	503		513		506		513
Average stock price used to calculate common stock equivalents	$	160.14	$	151.22	$	159.35	$	133.41

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Supplemental Disclosures to the Consolidated Statements of Cash Flows

9 Months Ended

Sep. 30, 2022

Supplemental Cash Flow Information [Abstract]

Supplemental Disclosures to the Consolidated Statements of Cash Flows

Supplemental Disclosures to the Consolidated Statements of Cash Flows

The following table provides additional information concerning acquisitions, interest and income taxes paid for the nine month periods ended September 30, 2022 and 2021.

(In millions)	2022		2021
Assets acquired, excluding cash, and cash and cash equivalents held in a fiduciary capacity	$	236	$	601
Acquisition-related deposit	24		—
Fiduciary liabilities assumed	(2)		(17)
Liabilities assumed	(28)		(59)
Contingent/deferred purchase consideration	(17)		(141)
Net cash outflow for acquisitions	$	213	$	384

(In millions)	2022		2021
Interest paid	$	388	$	407
Income taxes paid, net of refunds	$	697	$	686

The classification of contingent consideration in the consolidated statements of cash flows is dependent upon whether the receipt, payment or adjustment was part of the initial liability established on the acquisition date (financing) or an adjustment to the acquisition date liability (operating).

The following amounts are included in the consolidated statements of cash flows as operating and financing activities:

For the Nine Months Ended September 30,
(In millions)	2022		2021
Operating:
Contingent consideration payments for prior year acquisitions	$	(38)	$	(46)
Receipt of contingent consideration for dispositions	—		19
Acquisition/disposition related net charges (credits) for adjustments	38		11
Adjustments and payments related to contingent consideration	$	—	$	(16)
Financing:
Contingent consideration for prior year acquisitions	$	(28)	$	(26)
Deferred consideration related to prior year acquisitions	(116)		(84)
Payments of deferred and contingent consideration for acquisitions	$	(144)	$	(110)
Receipt of contingent consideration for dispositions	$	3	$	71

The Company had non-cash issuances of common stock under its share-based payment plan of $366 million and $225 million for the nine months ended September 30, 2022 and 2021, respectively. The Company recorded share-based compensation expense related to restricted stock units, performance stock units and stock options of $89 million and $283 million for the three and nine months ended September 30, 2022, respectively, and $87 million and $263 million for the three and nine months ended September 30, 2021, respectively.

Statement of Cash Flows Reclassifications

In the first quarter of 2022, the Company refined the statements of cash flows presentation to combine and reclassify certain line items within the operating cash flows section. In the third quarter, the Company further refined the statements of cash flows presentation to separately present purchases and sales of long term investments within the investing cash flows section. The prior year presentation was conformed to the current presentation with no impact on either operating or investing cash flows.

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Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Other Comprehensive Income (Loss)

Other Comprehensive Income (Loss)

The changes, net of tax, in the balances of each component of Accumulated Other Comprehensive Income ("AOCI") for the three and nine months ended September 30, 2022 and 2021, including amounts reclassified out of AOCI, are as follows:

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of July 1, 2022	$	(2,957)	$	(2,406)	$	(5,363)
Other comprehensive income (loss) before reclassifications	182		(895)		(713)
Amounts reclassified from accumulated other comprehensive income	28		—		28
Net current period other comprehensive income (loss)	210		(895)		(685)
Balance as of September 30, 2022	$	(2,747)	$	(3,301)	$	(6,048)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of July 1, 2021	$	(4,102)	$	(1,051)	$	(5,153)
Other comprehensive income (loss) before reclassifications	115		(346)		(231)
Amounts reclassified from accumulated other comprehensive income	39		—		39
Net current period other comprehensive income (loss)	154		(346)		(192)
Balance as of September 30, 2021	$	(3,948)	$	(1,397)	$	(5,345)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of December 31, 2021	$	(3,202)	$	(1,373)	$	(4,575)
Other comprehensive income (loss) before reclassifications	371		(1,928)		(1,557)
Amounts reclassified from accumulated other comprehensive income	84		—		84
Net current period other comprehensive income (loss)	455		(1,928)		(1,473)
Balance as of September 30, 2022	$	(2,747)	$	(3,301)	$	(6,048)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of December 31, 2020	$	(4,126)	$	(984)	$	(5,110)
Other comprehensive income (loss) before reclassifications	63		(413)		(350)
Amounts reclassified from accumulated other comprehensive income	115		—		115
Net current period other comprehensive income (loss)	178		(413)		(235)
Balance as of September 30, 2021	$	(3,948)	$	(1,397)	$	(5,345)

The components of other comprehensive (loss) income for the three and nine months ended September 30, 2022 and 2021 are as follows:

Three Months Ended September 30,	2022						2021
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	(895)	$	—	$	(895)	$	(346)	$	—	$	(346)
Pension/post-retirement plans:
Amortization of losses included in net periodic pension cost:
Net actuarial losses (a)	37		9		28		52		13		39
Subtotal	37		9		28		52		13		39
Foreign currency translation adjustments	247		63		184		88		21		67
Effect of remeasurement	(2)		—		(2)		64		16		48
Other adjustments	(1)		(1)		—		—		—		—
Pension/post-retirement plans gains	281		71		210		204		50		154
Other comprehensive (loss) income	$	(614)	$	71	$	(685)	$	(142)	$	50	$	(192)
(a) Included in other net benefit credits in the consolidated statements of income. Income tax expense on net actuarial losses are included in income tax expense.

Nine Months Ended September 30,	2022						2021
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	(1,928)	$	—	$	(1,928)	$	(413)	$	—	$	(413)
Pension/post-retirement plans:
Amortization of (gains) losses included in net periodic pension cost:
Prior service credits (a)	(1)		—		(1)		(1)		—		(1)
Net actuarial losses (a)	114		29		85		156		40		116
Subtotal	113		29		84		155		40		115
Foreign currency translation adjustments	499		123		376		7		1		6
Effect of remeasurement	8		1		7		77		17		60
Effect of settlement	2		—		2		2		—		2
Other adjustments	(19)		(5)		(14)		(7)		(2)		(5)
Pension/post-retirement plans gains	603		148		455		234		56		178
Other comprehensive (loss) income	$	(1,325)	$	148	$	(1,473)	$	(179)	$	56	$	(235)
(a) Included in other net benefit credits in the consolidated statements of income. Income tax expense on net actuarial losses are included in income tax expense.

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Acquisitions and Dispositions

9 Months Ended

Sep. 30, 2022

Business Combination and Asset Acquisition [Abstract]

Acquisitions and Dispositions

Acquisitions and Dispositions

The Company’s acquisitions have been accounted for as business combinations. Net assets and results of operations are included in the Company’s consolidated financial statements commencing at the respective purchase closing dates. In connection with acquisitions, the Company records the estimated values of the net tangible assets and the identifiable intangible assets purchased, which typically consist of customer relationships, developed technology, trademarks and non-compete agreements. The valuation of purchased intangible assets involves significant estimates and assumptions. The Company estimates the fair value of purchased intangible assets, primarily using the income approach, by determining the present value of future cash flows over the remaining economic life of the respective assets. The significant estimates and assumptions used in this approach include the determination of the discount rate, economic life, future revenue growth rates, expected account attrition rates and earnings margins. Refinement and completion of final valuation of net assets acquired could affect the carrying value of tangible assets, goodwill and identifiable intangible assets.

The Risk and Insurance Services segment completed eight acquisitions during the nine months ended September 30, 2022:

•January – Marsh McLennan Agency ("MMA") acquired Heil & Kay Insurance Agency Inc., an Illinois-based full-service broker providing business insurance, employee health benefits services and personal lines insurance.

•April – Marsh acquired the business of Regional Treaty Services Corporation, a Rhode Island-based managing general underwriter, which manages reinsurance facilities for small to midsize U.S.-based insurers primarily writing personal lines, small agriculture, and main street commercial business.

•June – MMA acquired Clark Insurance, a Maine-based, full-service broker providing business insurance, employee health and benefits and private client services to businesses and individuals across the region.

•July – MMA acquired CS Insurance Strategies, Inc., an Illinois-based full-service broker providing employee health and benefits, business insurance, and risk management consulting services to organizations of all sizes across the U.S. and Suchanek Partners LLC, an Ohio-based employee benefits insurance broker.

•August – Marsh acquired Best Insurance Co. Ltd, a Japan-based insurance broker that provides affinity type schemes, general and personal lines insurance.

•September – MMA acquired Steinberg & Associates, Inc., a South Carolina-based insurance broker that primarily offers employee health benefit services to group clients and Leykell, Inc., a Texas-based full-service broker that provides specialty insurance focused on trade credit.

The Consulting segment completed three acquisitions during the nine months ended September 30, 2022:

•February – Oliver Wyman acquired Azure Consulting, an Australia-based management consulting firm with expertise in strategy development, organizational design and operations in the industrials, energy and natural resources sectors.

•March – Mercer acquired GeFi Assurances, a France-based brokerage and consulting firm specializing in collective corporate social protection.

•September – Oliver Wyman acquired Booz Allen Hamilton's strategy consulting business serving the Middle East and North Africa.

Total purchase consideration for acquisitions made during the nine months ended September 30, 2022 was $227 million, which consisted of cash paid of $210 million and deferred purchase consideration and estimated contingent consideration of $17 million. Contingent consideration arrangements are based primarily on earnings before interest, tax, depreciation and amortization ("EBITDA") or revenue targets over a period of two to four years. During the nine months ended September 30, 2022, the Company also paid $116 million of deferred purchase consideration and $66 million of contingent consideration related to acquisitions made in prior years. Estimated fair values of assets acquired and liabilities assumed are subject to adjustment until purchase accounting is finalized.

The following table presents the preliminary allocation of purchase consideration to the assets acquired and liabilities assumed during 2022, based on the estimated fair values for the acquisitions as of their respective acquisition dates:

Acquisitions through September 30, 2022
(In millions)
Cash	$	210
Estimated fair value of deferred/contingent consideration	17
Total consideration	$	227
Allocation of purchase price:
Cash and cash equivalents	$	19
Cash and cash equivalents held in a fiduciary capacity	2
Net receivables	12
Other current assets	1
Goodwill	139
Other intangible assets	82
Fixed assets, net	2
Total assets acquired	257
Current liabilities	25
Fiduciary liabilities	2
Other liabilities	3
Total liabilities assumed	30
Net assets acquired	$	227

The purchase price allocation for assets acquired and liabilities assumed is based on estimates that are preliminary in nature and subject to adjustments, which could be material. Any necessary adjustments must be finalized during the measurement period, which for a particular asset, liability, or non-controlling interest ends once the acquirer determines that either (1) the necessary information has been obtained or (2) the information is not available. However, the measurement period for all items is limited to one year from the acquisition date.

Items subject to change include:

•amounts of intangible assets, fixed assets, capitalized software assets and right-of-use assets, subject to finalization of valuation efforts;

•amounts for contingencies, pending the finalization of the Company’s assessment of the portfolio of contingencies;

•amounts for deferred tax assets and liabilities, pending the finalization of valuations of the assets acquired, liabilities assumed and associated goodwill discussed below; and

•amounts for income tax assets, receivables and liabilities, pending the filing of the acquired companies' pre-acquisition income tax returns and receipt of information from taxing authorities which may change certain estimates and assumptions used.

The estimation of fair value requires numerous judgments, assumptions and estimates about future events and uncertainties, which could materially impact these values, and the related amortization, where applicable, in the Company’s results of operations.

The following table provides information about intangible assets acquired during 2022:

Intangible assets through September 30, 2022 (In millions)	Amount		Weighted Average Amortization Period
Client relationships	$	78	12.0 years
Other	4		4.5 years
Total intangibles	$	82

The consolidated statements of income include the results of operations of acquired companies since their respective acquisition dates. The consolidated statements of income for the three and nine month periods ended September 30, 2022, include revenue of approximately $16 million and $22 million, respectively, and operating loss of $1 million for the three and nine month periods ended September 30, 2022, for acquisitions made in 2022. The consolidated statements of income for the three and nine month periods ended September 30, 2021 include

revenue of approximately $38 million and $73 million, respectively, and operating income of $3 million and $4 million, respectively, for acquisitions made in 2021.

Dispositions

In April 2022, Mercer sold its U.S. affinity business that provided insurance marketing, brokerage and administration to association and affinity groups for cash proceeds of approximately $140 million and recorded a net gain of $112 million which is included in revenue in the consolidated statements of income.

In addition, during the first nine months of 2022, the Company sold certain businesses in Brazil and the U.K. for cash proceeds of approximately $7 million.

Prior year acquisitions

The Risk and Insurance Services segment completed eight acquisitions during 2021:

•April – MMA acquired PayneWest Insurance, Inc., a Montana-based full-service broker providing business insurance, surety, employee benefits and personal insurance services to companies and individuals, and The Pryor Group, LLC, a Texas-based full-service broker providing business insurance with a specialty in quick service restaurants and the personal lines of franchise owners.

•September – MMA acquired Vaaler Insurance, Inc., a North Dakota-based insurance broker providing business insurance, employee health and benefits, and personal lines solutions, with specialized expertise in the construction, education, and healthcare industries.

•November – MMA acquired Pelnik Insurance, a North Carolina-based full-service broker providing business insurance, employee health and benefits, and private client services to midsize businesses and individuals throughout the Mid-Atlantic, Southwest Truck Insurance Agency, Inc., a Texas-based broker providing business insurance for the trucking industry, serving clients in the U.S., and Mexico and InSource Insurance Group LLC, a Texas-based full-service broker providing business insurance, employee health and benefits, private client and surety services to the oil and gas, construction, manufacturing, and transportation industries.

•December – Marsh acquired Services Assurance Monétique ("SAM"), a France-based affinity insurance broker specializing in bank and retail insurance markets and increased its ownership interest in Marsh India Insurance Broker Private Limited ("Marsh India") from 49% to 92%.

The Consulting segment completed one acquisition during 2021:

•November – Oliver Wyman Group acquired Huron Consulting Group’s life sciences strategy consulting practice in the U.S. and the U.K., which assists clients in addressing their most important commercial strategy, marketing, pricing, market access and research and development challenges.

Total purchase consideration for acquisitions made during the nine months ended September 30, 2021 was approximately $546 million, which consisted of cash paid of $405 million and deferred purchase and estimated contingent consideration of $141 million. Contingent consideration arrangements are based primarily on EBITDA or revenue targets over a period of two to four years. For the first nine months of 2021, the Company also paid $84 million of deferred purchase consideration and $72 million of contingent consideration related to acquisitions made in prior years. Estimated fair values of assets acquired and liabilities assumed are subject to adjustment when purchase accounting is finalized.

Prior year dispositions

During the first nine months of 2021, the Company sold certain businesses in the U.S. and the U.K. for cash proceeds of approximately $84 million and recognized a net gain of approximately $50 million, primarily related to the commercial networks business in the U.K. that provided broking and back-office solutions for small independent brokers.

Deconsolidation of Russia

In the first quarter of 2022, the Company concluded that it does not meet the accounting criteria for control over its wholly-owned Russian subsidiaries due to the evolving trade and economic sanctions against Russia and the related Russian counter sanctions. These sanctions included restrictions on payments to and from Russian companies and reduced currency access through official exchange markets that have significantly impacted the Company's ability to effectively manage and operate its Russian businesses.

As a result, the Company deconsolidated its Russian businesses effective as of the end of the first quarter, and recorded a loss of $39 million included in revenue in the consolidated statements of income. The loss consisted of

the reclassification of cumulative translation losses from accumulated other comprehensive income and a charge for the write-off of the Russia businesses' net assets.

In June 2022, as previously announced in the first quarter, the Company entered into a definitive agreement to exit its businesses in Russia and transfer ownership to local management pending regulatory approvals.

Pro-Forma Information

The following unaudited pro-forma financial data gives effect to the acquisitions made by the Company during 2022 and 2021. In accordance with accounting guidance related to pro-forma disclosures, the information presented for acquisitions made in 2022 is as if they occurred on January 1, 2021, and reflects acquisitions made in 2021, as if they occurred on January 1, 2020. The unaudited pro-forma information includes the effects of amortization of acquired intangibles in all years. The unaudited pro-forma financial data is presented for illustrative purposes only and is not necessarily indicative of the operating results that would have been achieved if such acquisitions had occurred on the dates indicated, nor is it necessarily indicative of future consolidated results.

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2022		2021		2022		2021
Revenue	$	4,779	$	4,652	$	15,748	$	14,912
Net income attributable to the Company	$	548	$	543	$	2,594	$	2,358
Basic net income per share attributable to the Company	$	1.10	$	1.07	$	5.18	$	4.65
Diluted net income per share attributable to the Company	$	1.09	$	1.06	$	5.12	$	4.59

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Goodwill and Other Intangibles

9 Months Ended

Sep. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangibles

Goodwill and Other Intangibles

The Company is required to assess goodwill and any indefinite-lived intangible assets for impairment annually, or more frequently if circumstances indicate impairment may have occurred. The Company performs the annual impairment assessment for each of its reporting units during the third quarter of each year. In accordance with applicable accounting guidance, a company can assess qualitative factors to determine whether it is necessary to perform a quantitative goodwill impairment test. Alternatively, the Company may elect to proceed directly to the quantitative goodwill impairment test. In the third quarter of 2022, the Company completed a qualitative impairment assessment and concluded that goodwill was not impaired. As part of its assessment, the Company considered numerous factors, including:

•that the fair value of each reporting unit exceeds its carrying value by a substantial margin based on its most recent quantitative assessment in 2019;

•whether significant acquisitions or dispositions occurred which might alter the fair value of its reporting units;

•macroeconomic conditions and their potential impact on reporting unit fair values;

•actual performance compared with budget and prior projections used in its estimation of reporting unit fair values;

•industry and market conditions; and

•the year-over-year change in the Company’s share price.

Other intangible assets that are not deemed to have an indefinite life are amortized over their estimated lives and assessed for impairment upon the occurrence of certain triggering events in accordance with applicable accounting literature. Based on its assessment, the Company concluded that other intangible assets were not impaired. The Company does not have any indefinite lived intangible assets.

Changes in the carrying amount of goodwill are as follows:

(In millions)	2022		2021
Balance as of January 1,	$	16,317	$	15,517
Goodwill acquired	139		374
Other adjustments(a)	(880)		(243)
Balance at September 30,	$	15,576	$	15,648

(a) Primarily reflects the impact of foreign exchange.

The goodwill arising from acquisitions in 2022 and 2021 consists largely of the synergies and economies of scale expected from combining the operations of the Company and the acquired entities and the trained and assembled workforce acquired.

The goodwill acquired in 2022 included approximately $92 million and $25 million in the Risk and Insurance Services and Consulting segments, respectively, which is deductible for tax purposes.

Goodwill allocable to the Company’s reportable segments at September 30, 2022 is as follows: Risk and Insurance Services, $12.0 billion and Consulting, $3.6 billion.

The gross cost and accumulated amortization of identified intangible assets at September 30, 2022 and December 31, 2021 are as follows:

	September 30, 2022						December 31, 2021
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client relationships	$	3,759	$	1,407	$	2,352	$	4,066	$	1,334	$	2,732
Other (a)	340		289		51		365		287		78
Amortized intangibles	$	4,099	$	1,696	$	2,403	$	4,431	$	1,621	$	2,810

(a) Primarily reflects non-compete agreements, trade names and developed technology.

Aggregate amortization expense was $84 million and $258 million for the three and nine months ended September 30, 2022, compared to $89 million and $278 million for the corresponding periods in the prior year. The estimated future aggregate amortization expense is as follows:

For the Years Ending December 31,
(In millions)	Estimated Expense
2022 (excludes amortization through September 30, 2022)	$	86
2023	301
2024	283
2025	252
2026	234
Subsequent years	1,247
Total future amortization	$	2,403

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Fair Value Measurements

9 Months Ended

Sep. 30, 2022

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Fair Value Hierarchy

The Company has categorized its assets and liabilities that are valued at fair value on a recurring basis into a three-level fair value hierarchy as defined by the FASB. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets and liabilities (Level 1) and lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy, for disclosure purposes, is determined based on the lowest level input that is significant to the fair value measurement. Assets and liabilities recorded in the consolidated balance sheets at fair value are categorized based on the inputs in the valuation techniques as follows:

Level 1.Assets and liabilities whose values are based on unadjusted quoted prices for identical assets or liabilities in an active market (examples include active exchange-traded equity securities and exchange-traded money market mutual funds).

Assets and liabilities measured using Level 1 inputs include exchange-traded equity securities, exchange-traded mutual funds and money market funds.

Level 2.Assets and liabilities whose values are based on the following:

a)quoted prices for similar assets or liabilities in active markets;

b)quoted prices for identical or similar assets or liabilities in non-active markets (examples include corporate and municipal bonds, which trade infrequently);

c)pricing models whose inputs are observable for substantially the full term of the asset or liability (examples include most over-the-counter derivatives, including interest rate and currency swaps); and

d)pricing models whose inputs are derived principally from or corroborated by observable market data through correlation or other means for substantially the full asset or liability (for example, certain mortgage loans).

Assets and liabilities using Level 2 inputs are related to an equity security.

Level 3.Assets and liabilities whose values are based on prices, or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the asset or liability.

Assets and liabilities measured using Level 3 inputs relate to assets and liabilities for contingent purchase consideration.

Valuation Techniques

Equity Securities, Money Market Mutual Funds and Mutual Funds – Level 1

Investments for which market quotations are readily available are valued at the sale price on their principal exchange or, for certain markets, official closing bid price. Money market funds are valued at a readily determinable price.

Contingent Purchase Consideration Assets and Liabilities – Level 3

Purchase consideration for some acquisitions and dispositions made by the Company include contingent consideration arrangements. Contingent consideration arrangements are based primarily on EBITDA or revenue targets over a period of two to four years. The fair value of the contingent purchase consideration asset and liability is estimated as the present value of future cash flows to be paid, based on projections of revenue and earnings and related targets of the acquired and disposed entities.

The following fair value hierarchy table presents information about the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2022 and December 31, 2021:

	Identical Assets (Level 1)				Observable Inputs (Level 2)				Unobservable Inputs (Level 3)				Total
(In millions)	09/30/22		12/31/21		09/30/22		12/31/21		09/30/22		12/31/21		09/30/22		12/31/21
Assets:
Financial instruments owned:
Exchange traded equity securities (a)	$	4	$	61	$	—	$	—	$	—	$	—	$	4	$	61
Mutual funds (a)	153		192		—		—		—		—		153		192
Money market funds (b)	89		425		—		—		—		—		89		425
Other equity investment (a)	—		—		—		8		—		—		—		8
Contingent purchase consideration assets (c)	—		—		—		—		2		5		2		5
Total assets measured at fair value	$	246	$	678	$	—	$	8	$	2	$	5	$	248	$	691
Fiduciary Assets:
U.S. treasury bills (d)	$	—	$	55	$	—	$	—	$	—	$	—	$	—	$	55
Money market funds	126		527		—		—		—		—		126		527
Total fiduciary assets measured at fair value	$	126	$	582	$	—	$	—	$	—	$	—	$	126	$	582
Liabilities:
Contingent purchase consideration liability (e)	$	—	$	—	$	—	$	—	$	328	$	352	$	328	$	352
Total liabilities measured at fair value	$	—	$	—	$	—	$	—	$	328	$	352	$	328	$	352

(a) Included in other assets in the consolidated balance sheets.

(b) Included in cash and cash equivalents in the consolidated balance sheets.

(c) Included in other receivables in the consolidated balance sheets.

(d) Maturity dates of three months or less.

(e) Included in accounts payable and accrued liabilities and other liabilities in the consolidated balance sheets.

The Level 3 assets in the table reflect contingent purchase consideration from the sale of businesses. The change in the contingent purchase consideration assets from December 31, 2021 is driven by cash receipts of approximately $3 million.

During the nine months ended September 30, 2022, there were no assets or liabilities that were transferred between levels.

The following table sets forth a summary of the changes in fair value of the Company’s Level 3 liabilities for the three and nine months ended September 30, 2022 and 2021:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Balance at beginning of period	$	345	$	340	$	352	$	243
Net additions	4		1		4		99
Payments	(32)		(54)		(66)		(72)
Revaluation impact	11		18		38		35
Other (a)	—		(2)		—		(2)
Balance at September 30,	$	328	$	303	$	328	$	303

(a) Primarily reflects the impact of foreign exchange.

Long-Term Investments

The Company holds investments in public and private companies as well as certain private equity investments that are accounted for using the equity method of accounting. The carrying value of these investments was $222 million and $207 million at September 30, 2022 and December 31, 2021, respectively.

Investments in Public and Private Companies

The Company has investments in private insurance and consulting companies with a carrying value of $57 million and $58 million at September 30, 2022 and December 31, 2021, respectively. These investments are accounted for using the equity method of accounting, the results of which are included in revenue in the consolidated statements of income and the carrying value of which is included in other assets in the consolidated balance sheets. The Company records its share of income or loss on its equity method investments, some of which are on a one quarter lag basis. In December 2021, the Company increased its ownership in Marsh India from 49% to 92%. Prior to the increase in ownership, the Company accounted for the investment under the equity method of accounting.

Private Equity Investments

The Company's investments in private equity funds were $165 million and $149 million at September 30, 2022 and December 31, 2021, respectively. The carrying values of these private equity investments approximate fair value. The underlying private equity funds follow investment company accounting, where investments within the fund are carried at fair value. The Company records in earnings its proportionate share of the change in fair value of the funds on the investment income line in the consolidated statements of income. These investments are included in other assets in the consolidated balance sheets. The Company recorded net investment gains of $3 million and $23 million for the three and nine months ended September 30, 2022, respectively, and net investment gains of $13 million and $40 million from these investments for the corresponding periods in 2021.

Other Investments

At September 30, 2022 and December 31, 2021, the Company held equity investments with readily determinable market values of $17 million and $75 million, respectively. The Company recorded mark-to-market investment gains on these investments of $11 million and $3 million in the nine months ended September 30, 2022 and 2021, respectively.

The Company also held investments without readily determinable market values of $38 million and $36 million at September 30, 2022 and December 31, 2021, respectively.

In the third quarter, the Company sold certain of these investments for cash proceeds of approximately $62 million, including the investment in the common stock of Alexander Forbes ("AF"), and recorded a net loss of $4 million.

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Derivatives

9 Months Ended

Sep. 30, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives

Derivatives

Net Investment Hedge

The Company has investments in various subsidiaries with Euro functional currencies. As a result, the Company is exposed to the risk of fluctuations between the Euro and U.S. dollar exchange rates. The Company designated its €1.1 billion senior note debt instruments ("Euro notes") as a net investment hedge (the "hedge") of its Euro denominated subsidiaries. The hedge effectiveness is re-assessed each quarter to confirm that the designated equity balance at the beginning of each period continues to equal or exceed 80% of the outstanding balance of the Euro debt instrument and that all the critical terms of the hedging instrument and the hedged net investment continue to match. If the Company concludes that the hedge is highly effective, the change in the debt balance related to foreign exchange fluctuations is recorded in accumulated other comprehensive loss in the consolidated balance sheets.

The Company concluded that the hedge continues to be highly effective as of September 30, 2022. The U.S. dollar value of the Euro notes decreased $179 million through September 30, 2022, due to the impact of foreign exchange rates, with a corresponding decrease to accumulated other comprehensive loss.

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Leases

9 Months Ended

Sep. 30, 2022

Leases [Abstract]

Leases

Leases

The Company leases office facilities under non-cancelable operating leases with terms generally ranging between 10 and 25 years. The Company utilizes these leased office facilities for use by its employees in countries in which the Company conducts its business. None of the Company’s leases restrict the payment of dividends or the acquisition of debt or additional lease obligations, or contain significant purchase options.

Operating leases are recognized on the balance sheet as ROU assets and operating lease liabilities based on the present value of the remaining future minimum payments over the lease term at commencement date of the lease.

The following table provides additional information about the Company’s property leases:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Lease Cost:
Operating lease cost (a)	$	84	$	93	$	262	$	282
Short-term lease cost	1		1		3		4
Variable lease cost	35		38		99		101
Sublease income	(3)		(3)		(12)		(16)
Net lease cost	$	117	$	129	$	352	$	371
Other information:
Operating cash outflows from operating leases					$	286	$	310
Right of use assets obtained in exchange for new operating lease liabilities					$	148	$	282
Weighted-average remaining lease term – real estate					8.4 years		9.0 years
Weighted-average discount rate – real estate leases					2.87%		2.75%

(a) Excludes ROU asset impairment charges.

Future minimum lease payments for the Company’s operating leases as of September 30, 2022 are as follows:

Payment Dates (In millions)	Real Estate Leases
Remainder of 2022	$	90
2023	341
2024	302
2025	272
2026	250
2027	216
Subsequent years	690
Total future lease payments	2,161
Less: Imputed interest	(243)
Total	$	1,918
Current lease liabilities	$	298
Long-term lease liabilities	1,620
Total lease liabilities	$	1,918

Note: The table excludes obligations for leases with original terms of 12 months or less which have not been recognized as a ROU asset or liability in the consolidated balance sheets.

As of September 30, 2022, the Company had additional operating real estate leases that had not yet commenced of $39 million. These operating leases will commence over the next 12 months.

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Retirement Benefits

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

Retirement Benefits

Retirement Benefits

The Company maintains qualified and non-qualified defined benefit pension plans for its U.S. and non-U.S. eligible employees. The Company’s policy for funding its tax-qualified defined benefit pension plans is to contribute amounts at least sufficient to meet the funding requirements set forth by U.S. law and the laws of the non-U.S. jurisdictions in which the Company offers defined benefit plans.

The target asset allocation for the U.S. plans is 60% equities and equity alternatives and 40% fixed income. At September 30, 2022, the actual allocation for the U.S. plans was 61% equities and equity alternatives and 39% fixed income. The target allocation for the U.K. plans at September 30, 2022 is 14% equities and equity alternatives and 86% fixed income. At September 30, 2022, the actual allocation for the U.K. plans was 17% equities and equity alternatives and 83% fixed income. The Company's U.K. plans comprised approximately 81% of non-U.S. plan assets at December 31, 2021. The assets of the Company's defined benefit plans are diversified and are managed in accordance with applicable laws and with the goal of maximizing the plans' real return within acceptable risk parameters. The Company generally uses threshold-based portfolio re-balancing to ensure the actual portfolio remains consistent with target asset allocation ranges.

The net benefit cost or credit of the Company's defined benefit plans is measured on an actuarial basis using various methods and assumptions. The components of the net benefit credit for defined benefit plans are as follows:

Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Service cost	$	6	$	9
Interest cost	95		87
Expected return on plan assets	(191)		(208)
Recognized actuarial loss	38		52
Net benefit credit	$	(52)	$	(60)
Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Service cost	$	21	$	29
Interest cost	294		258
Expected return on plan assets	(590)		(627)
Recognized actuarial loss	114		155
Net periodic benefit credit	$	(161)	$	(185)
Settlement loss	2		2
Net benefit credit	$	(159)	$	(183)

Amounts Recorded in the Consolidated Statements of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Compensation and benefits expense	$	6	$	9
Other net benefit credit	(58)		(69)
Net benefit credit	$	(52)	$	(60)

Amounts Recorded in the Consolidated Statements of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Compensation and benefits expense	$	21	$	29
Other net benefit credit	(180)		(212)
Net benefit credit	$	(159)	$	(183)

U.S. Plans only	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Interest cost	$	48	$	47
Expected return on plan assets	(85)		(82)
Recognized actuarial loss	19		22
Net benefit credit	$	(18)	$	(13)

U.S. Plans only	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Interest cost	$	145	$	139
Expected return on plan assets	(253)		(245)
Recognized actuarial loss	56		67
Net benefit credit	$	(52)	$	(39)

Significant non-U.S. Plans only	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Service cost	$	6	$	9
Interest cost	47		40
Expected return on plan assets	(106)		(126)
Recognized actuarial loss	19		30
Net benefit credit	$	(34)	$	(47)

Significant non-U.S. Plans only	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Service cost	$	21	$	29
Interest cost	149		119
Expected return on plan assets	(337)		(382)
Recognized actuarial loss	58		88
Net periodic benefit credit	$	(109)	$	(146)
Settlement loss	2		2
Net benefit credit	$	(107)	$	(144)

The weighted average actuarial assumptions utilized to calculate the net periodic benefit costs for the U.S. and significant non-U.S. defined benefit plans are as follows:

Combined U.S. and significant non-U.S. Plans	Pension Benefits
September 30,	2022		2021
Weighted average assumptions:
Expected return on plan assets	4.56	%	4.72	%
Discount rate	2.28	%	1.92	%
Rate of compensation increase	2.16	%	1.85	%

The Company made contributions to its U.S. and non-U.S. defined benefit pension plans for the three and nine months ended September 30, 2022 of approximately $28 million and $141 million, respectively, compared to contributions of $33 million and $90 million for the corresponding periods in the prior year. The Company expects to contribute approximately $28 million to its U.S. and non-U.S. defined benefit pension plans during the remainder of 2022.

Defined Contribution Plans

The Company maintains certain defined contribution plans ("DC Plans") for its employees, the most significant being in the U.S. and the U.K. The cost of the U.S. DC Plans for the three and nine months ended September 30, 2022 was $39 million and $122 million, respectively, and $37 million and $115 million for the corresponding periods in the prior year. The cost of the U.K. DC Plans for the three and nine months ended September 30, 2022, was $31 million and $108 million, respectively, and $33 million and $106 million for the corresponding periods in the prior year.

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Debt

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Debt

Debt

The Company’s outstanding debt is as follows:

(In millions)	September 30, 2022		December 31, 2021
Short-term:
Commercial paper	$	600	$	—
Current portion of long-term debt	367		17
	967		17
Long-term:
Senior notes – 3.30% due 2023	350		349
Senior notes – 4.05% due 2023	250		249
Senior notes – 3.50% due 2024	599		599
Senior notes – 3.875% due 2024	998		997
Senior notes – 3.50% due 2025	499		498
Senior notes – 1.349% due 2026	535		629
Senior notes – 3.75% due 2026	598		598
Senior notes – 4.375% due 2029	1,499		1,499
Senior notes – 1.979% due 2030	532		614
Senior notes – 2.250% due 2030	740		739
Senior notes – 2.375% due 2031	396		397
Senior notes – 5.875% due 2033	298		298
Senior notes – 4.75% due 2039	495		495
Senior notes – 4.35% due 2047	493		493
Senior notes – 4.20% due 2048	593		593
Senior notes – 4.90% due 2049	1,238		1,238
Senior notes – 2.90% due 2051	346		346
Mortgage – 5.70% due 2035	305		316
Other	2		3
	10,766		10,950
Less current portion	367		17
	$	10,399	$	10,933

The senior notes in the table above are registered by the Company with the Securities and Exchange Commission and are not guaranteed.

On April 9, 2021, the Company increased its short-term commercial paper financing program to $2.0 billion from $1.5 billion. The Company had $600 million of commercial paper outstanding at September 30, 2022, at an average effective interest rate of 3.39%.

Credit Facilities

The Company has a multi-currency unsecured $2.8 billion five-year revolving credit facility (the "Credit Facility"). The interest rate on the Credit Facility is based on LIBOR plus a fixed margin which varies with the Company’s credit ratings. The Credit Facility expires in April 2026, and requires the Company to maintain certain coverage and leverage ratios which are tested quarterly. The Credit Facility includes provisions for determining a LIBOR successor rate in the event LIBOR reference rates are no longer available or in certain other circumstances which are determined to make using an alternative rate desirable. As of September 30, 2022, the Company had no borrowings under this facility.

On May 31, 2022, the Company secured a $250 million uncommitted revolving credit facility. The facility expires in May 2023, and has similar coverage and leverage ratios as the Credit Facility. The Company had no borrowings outstanding under this facility at September 30, 2022.

Additional credit facilities, guarantees and letters of credit are maintained with various banks aggregating $507 million at September 30, 2022 and $508 million at December 31, 2021. There were no outstanding borrowings under these facilities at September 30, 2022 and December 31, 2021.

Senior Notes

In December 2021, the Company issued $400 million of 2.375% senior notes due 2031 and $350 million of 2.90% senior notes due 2051. The Company used the net proceeds from these issuances for general corporate purposes, and repaid $500 million of 2.75% senior notes with an original maturity date of January 2022 in December 2021.

On April 15, 2021, the Company repaid $500 million of senior notes maturing in July 2021.

Fair Value of Short-term and Long-term Debt

The estimated fair value of the Company's short-term and long-term debt is provided below. Certain estimates and judgments were required to develop the fair value amounts. The fair value amounts shown below are not necessarily indicative of the amounts that the Company would realize upon disposition, nor do they indicate the Company’s intent or need to dispose of the financial instrument.

	September 30, 2022				December 31, 2021
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Short-term debt	$	967	$	965	$	17	$	17
Long-term debt	$	10,399	$	9,434	$	10,933	$	12,466

The fair value of the Company's short-term debt consists primarily of commercial paper and term debt maturing within the next year and its fair value approximates its carrying value. The estimated fair value of a primary portion of the Company's long-term debt is based on discounted future cash flows using current interest rates available for debt with similar terms and remaining maturities. Short-term and long-term debt would be classified as Level 2 in the fair value hierarchy.

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Restructuring Costs

9 Months Ended

Sep. 30, 2022

Restructuring and Related Activities [Abstract]

Restructuring Costs

Restructuring Costs

Restructuring costs include Company initiated actions related to improving and streamlining the Company's global information technology and HR functions, JLT integration costs, improving efficiencies and client services related to the Marsh operational excellence program, and real estate related costs for exiting leased facilities.

For the three and nine months ended September 30, 2022, the Company incurred costs of $38 million and $96 million, respectively, reflecting $18 million and $44 million in RIS, $5 million and $16 million in Consulting, and $15 million and $36 million in Corporate related to these initiatives.

Details of the restructuring activity from January 1, 2021 through September 30, 2022, are as follows:

(In millions)	Severance		Real Estate Related Costs (a)		Information Technology		Consulting and Other Outside Services		Total
Liability at 1/1/21	$	52	$	51	$	2	$	1	$	106
2021 charges	38		31		23		71		163
Cash payments	(55)		(26)		(25)		(72)		(178)
Non-cash charges	—		(22)		—		—		(22)
Liability at 12/31/21	$	35	$	34	$	—	$	—	$	69
2022 charges	6		12		7		71		96
Cash payments	(31)		(18)		(5)		(70)		(124)
Non-cash charges	—		(5)		(2)		—		(7)
Liability at 9/30/22	$	10	$	23	$	—	$	1	$	34

(a) Includes ROU and fixed asset impairments and other real estate related costs.

The expenses associated with these initiatives are included in compensation and benefits and other operating expenses in the consolidated statements of income. The liabilities associated with these initiatives are classified on the consolidated balance sheets as accounts payable and accrued liabilities, other liabilities or accrued compensation and employee benefits, depending on the nature of the items.

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Common Stock

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Common Stock

Common Stock

On March 23, 2022, the Board of Directors of the Company authorized an additional $5 billion in share repurchases. This is in addition to the Company's existing share repurchase program, which had approximately $1.3 billion of remaining authorization as of December 31, 2021.

During the first nine months of 2022, the Company repurchased 10.1 million shares of its common stock for $1.6 billion. As of September 30, 2022, the Company remained authorized to repurchase up to approximately $4.7 billion in shares of its common stock. There is no time limit on the authorization. During the first nine months of 2021, the Company repurchased 5.3 million shares of its common stock for $734 million.

The Company issued approximately 3.1 million shares related to stock compensation and employee stock purchase plans during the first nine months of 2022 and 2021.

In September 2022, the Board of Directors of the Company declared a quarterly dividend of $0.590 per share on outstanding common stock, payable on November 15, 2022, to stockholders of record on October 7, 2022.

In July 2022, the Board of Directors of the Company increased the quarterly dividend by 10% from $0.535 to $0.590 per share paid in the third quarter of 2022.

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Claims, Lawsuits And Other Contingencies

9 Months Ended

Sep. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

Claims, Lawsuits and Other Contingencies

Claims, Lawsuits and Other Contingencies

Acquisition of Jardine Lloyd Thompson Group plc

On April 1, 2019, the Company completed its previously announced acquisition of all of the outstanding shares of JLT. Upon the consummation of the acquisition of JLT, the Company assumed the legal liabilities and became responsible for JLT’s litigation and regulatory exposures as of April 1, 2019.

Nature of Contingencies

The Company and its subsidiaries are subject to a significant number of claims, lawsuits and proceedings in the course of our business. Such claims and lawsuits consist principally of alleged errors and omissions in connection with the performance of professional services, including the placement of insurance, the provision of actuarial services for corporate and public sector clients, the provision of investment advice and investment management services to pension plans, the provision of advice relating to pension buy-out transactions and the provision of consulting services relating to the drafting and interpretation of trust deeds and other documentation governing pension plans. These claims often seek damages, including punitive and treble damages, in amounts that could be significant. In establishing liabilities for errors and omissions claims in accordance with FASB guidance on Contingencies - Loss Contingencies, the Company uses case level reviews by inside and outside counsel, and internal actuarial analysis by Oliver Wyman, a subsidiary of the Company, and other methods to estimate potential losses. A liability is established when a loss is both probable and reasonably estimable. The liability is reviewed quarterly and adjusted as developments warrant. In many cases, the Company has not recorded a liability, other than for legal fees to defend the claim, because we are unable, at the present time, to make a determination that a loss is both probable and reasonably estimable. To the extent that expected losses exceed our deductible in any policy year, the Company also records an asset for the amount that we expect to recover under any available third-party insurance programs. The Company has varying levels of third-party insurance coverage, with policy limits and coverage terms varying significantly by policy year.

Our activities are regulated under the laws of the United States and its various states, United Kingdom, the European Union and its member states, and the many other jurisdictions in which the Company operates. The Company also receives subpoenas in the ordinary course of business, and, from time to time, requests for information in connection with government investigations.

Current Matters

Risk and Insurance Services Segment

•In January 2019, the Company received a notice that the Administrative Council for Economic Defense anti-trust agency in Brazil had commenced an administrative proceeding against a number of insurance brokers, including both Marsh and JLT, and insurers "to investigate an alleged sharing of sensitive commercial and competitive confidential information" in the aviation insurance and reinsurance sector.

•In 2017, JLT identified payments to a third-party introducer that had been directed to unapproved bank accounts. These payments related to reinsurance placements made on behalf of an Ecuadorian state-owned insurer between 2014 and 2017. In early 2018, JLT voluntarily reported this matter to law enforcement authorities. In February and March 2020, money laundering charges were filed in the United States against a former employee of JLT, the principals of the third-party introducer and a former official of

the state-owned insurer. These individuals, including the former JLT employee, have since pleaded guilty to criminal charges.

In March 2022, the U.S. Department of Justice (DOJ) issued a declination letter, declining to pursue any charges against any JLT entity and seeking disgorgement of $29 million in alleged gross profits on this account. As previously disclosed, the Company recorded a charge for this amount in the fourth quarter of 2021. In addition, in March 2022, the Colombian Superintendecia de Sociedades (SS) concluded its investigation of this matter and notified JLT of its intention to seek $2 million in civil penalties which was recorded in the first quarter of 2022. The SS issued its final resolution in May 2022. In June 2022, JLT reached an agreement to settle the investigation by the U.K. Financial Conduct Authority (FCA) for £7.9 million (or $11 million) in civil penalties which concluded the FCA’s investigation into this matter, and the Company recorded a charge for this amount in the second quarter of 2022.

•From 2014, Marsh Ltd. was engaged by Greensill Capital (UK) Limited as its insurance broker. Marsh Ltd. placed a number of trade credit insurance policies for Greensill. On March 1, 2021, Greensill filed an action against certain of its trade credit insurers in Australia seeking a mandatory injunction compelling these insurers to renew coverage under expiring policies. Later that day, the Australian court denied Greensill’s application. Since then, a number of Greensill entities have filed for, or been subject to, insolvency proceedings, and several litigations and investigations have been commenced in the U.K., Australia, Germany, Switzerland and the U.S.

Consulting Segment

•In 2014, the FCA conducted an industry-wide review of the suitability of financial advice provided to individuals by a number of companies, including JLT, relating to enhanced transfer value ("ETV") defined benefit pension transfers. In January 2015, the FCA notified JLT that it was commissioning a Skilled Person review of ETV pension transfer advice given by JLT and a business acquired by JLT in 2012. Following the Skilled Person review which took place between 2015 and 2018, JLT engaged a compliance consulting firm to conduct an analysis of approximately 14,000 individual files to assess the suitability of the advice provided and, where appropriate, the amount of redress to be paid. In February 2019, prior to the completion of its acquisition by the Company, JLT recorded a gross liability of £59 million (or $77 million). This preliminary estimate by JLT, reflected projected redress amounts based on the limited number of files examined as part of the Skilled Person review and report. Thereafter, the FCA expanded the scope of the review. As of December 31, 2020, the updated redress liability, including the projected costs of completing the review, increased to £155 million (or $210 million) resulting from the expansion in the scope of the review, and the significant progress made in completing the individual suitability reviews. Payments of redress and expenses during 2021 and the first nine months of 2022 reduced the recorded liability to £6 million (or $6 million) as of September 30, 2022. The suitability review and calculation of redress for affected customers is now substantially complete, and the vast majority of redress payments have been made. In July 2022, the FCA notified JLT that it had closed its review of this matter. This gross liability has been, and we anticipate will continue to be, partially offset by a contractual indemnity obligation and insurance recoveries from third-party E&O insurers.

At this time, we are unable to predict the likely timing, outcome or ultimate impact of the foregoing matters. Adverse determinations in one or more of these matters could have a material impact on the Company's consolidated results of operations, financial condition or cash flows in a future period.

Other Contingencies-Guarantees

In connection with its acquisition of U.K.-based Sedgwick Group in 1998, the Company acquired several insurance underwriting businesses that were already in run-off, including River Thames Insurance Company Limited ("River Thames"), which the Company sold in 2001. Sedgwick guaranteed payment of claims on certain policies underwritten through the Institute of London Underwriters (the "ILU") by River Thames. The policies covered by this guarantee are partly reinsured by a related party of River Thames. Payment of claims under the reinsurance agreement is collateralized by funds withheld by River Thames from the reinsurer. To the extent River Thames or the reinsurer is unable to meet its obligations under those policies, a claimant may seek to recover from the Company under the guarantee.

From 1980 to 1983, the Company owned indirectly the English & American Insurance Company ("E&A"), which was a member of the ILU. The ILU required the Company to guarantee a portion of E&A's obligations. After E&A became insolvent in 1993, the ILU agreed to discharge the guarantee in exchange for the Company's agreement to post an evergreen letter of credit that is available to pay claims by policyholders on certain E&A policies issued through the

ILU and incepting between July 3, 1980 and October 6, 1983. Certain claims have been paid under the letter of credit and the Company anticipates that additional claimants may seek to recover against the letter of credit.

* * * *

The pending proceedings described above and other matters not explicitly described in this Note 17 on Claims, Lawsuits and Other Contingencies may expose the Company or its subsidiaries to liability for significant monetary damages, fines, penalties or other forms of relief. Where a loss is both probable and reasonably estimable, the Company establishes liabilities in accordance with FASB guidance on Contingencies - Loss Contingencies.

Except as described above, the Company is not able at this time to provide a reasonable estimate of the range of possible loss attributable to these matters or the impact they may have on the Company's consolidated results of operations, financial position or cash flows. This is primarily because these matters are still developing and involve complex issues subject to inherent uncertainty. Adverse determinations in one or more of these matters could have a material impact on the Company's consolidated results of operations, financial condition or cash flows in a future period.

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Segment Information

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company is organized based on the types of services provided. Under this structure, the Company’s segments are:

•Risk and Insurance Services, comprising insurance services (Marsh) and reinsurance services (Guy Carpenter); and

•Consulting, comprising Mercer and the Oliver Wyman Group.

The accounting policies of the segments are the same as those utilized for the consolidated financial statements described in Note 1, Summary of Significant Accounting Policies, in the Company’s 2021 Form 10-K. Segment performance is evaluated based on segment operating income, which includes directly related expenses, and charges or credits related to integration and restructuring but not the Company’s corporate-level expenses. Revenues are attributed to geographic areas on the basis of where the services are performed.

Selected information about the Company’s segments for the three and nine months ended September 30, 2022 and 2021 is as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(In millions)	Revenue			Operating Income (Loss)		Revenue			Operating Income (Loss)
2022–
Risk and Insurance Services	$	2,838	(a)	$	529	$	9,700	(c)	$	2,617
Consulting	1,951		(b)	350		6,045		(d)	1,217
Total Operating Segments	4,789			879		15,745			3,834
Corporate/Eliminations	(19)			(88)		(47)			(234)
Total Consolidated	$	4,770		$	791	$	15,698		$	3,600
2021–
Risk and Insurance Services	$	2,670	(a)	$	403	$	9,036	(c)	$	2,413
Consulting	1,925		(b)	404		5,690		(d)	1,109
Total Operating Segments	4,595			807		14,726			3,522
Corporate/Eliminations	(12)			(67)		(43)			(196)
Total Consolidated	$	4,583		$	740	$	14,683		$	3,326

(a) Includes interest income on fiduciary funds of $40 million and $4 million in 2022 and 2021, respectively, and equity method income of $8 million in 2021.

(b) Includes inter-segment revenue of $19 million and $11 million in 2022 and 2021, respectively.

(c) Includes inter-segment revenue of $5 million in both 2022 and 2021, interest income on fiduciary funds of $57 million and $12 million in 2022 and 2021, respectively, and equity method income of $9 million and $25 million in 2022 and 2021, respectively. Revenue for 2022 also includes the loss on deconsolidation of the Russian businesses of $27 million. Revenue for 2021 includes $52 million primarily from the gain on the sale of the U.K. commercial networks business.

(d) Includes inter-segment revenue of $42 million and $38 million in 2022 and 2021, respectively. Revenue for 2022 also includes a gain on the sale of the Mercer U.S. affinity business of $112 million, partly offset by the loss on deconsolidation of the Russian businesses of $12 million.

Details of operating segment revenue for the three and nine months ended September 30, 2022 and 2021 are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Risk and Insurance Services
Marsh	$	2,497	$	2,355	$	7,833	$	7,336
Guy Carpenter	341		315		1,867		1,700
Total Risk and Insurance Services	2,838		2,670		9,700		9,036
Consulting
Mercer	1,284		1,315		4,016		3,877
Oliver Wyman Group	667		610		2,029		1,813
Total Consulting	1,951		1,925		6,045		5,690
Total Operating Segments	4,789		4,595		15,745		14,726
Corporate Eliminations	(19)		(12)		(47)		(43)
Total	$	4,770	$	4,583	$	15,698	$	14,683

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New Accounting Guidance

9 Months Ended

Sep. 30, 2022

Accounting Standards Update and Change in Accounting Principle [Abstract]

New Accounting Guidance

New Accounting Guidance

New Accounting Pronouncement Adopted Effective January 1, 2022:

In October 2021, the FASB issued new guidance for measuring contract assets and contract liabilities acquired in a business combination. In accordance with the new guidance, contract assets and contract liabilities should be measured in accordance with the guidance for revenue from contracts with customers as opposed to the guidance for business combinations. The guidance must be applied on a prospective basis, and is effective for fiscal years beginning after December 15, 2022, including interim periods therein. Early adoption is permitted. The Company elected to adopt this new standard effective January 1, 2022. Adoption of this guidance did not have a material impact on the Company's financial position or results of operations.    

New Accounting Pronouncements Adopted Effective January 1, 2021:

In January 2020, the FASB issued guidance that addresses accounting for the transition into and out of the equity method and measuring certain purchased options and forward contracts to acquire investments. The standard takes effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The adoption of this standard did not have a material impact on the Company’s financial position or its results of operations.

In December 2019, the FASB issued guidance related to the accounting for income taxes. The standard removes specific exceptions in the current rules and eliminates the need for an organization to analyze whether the following apply in a given period: (a) exception to the incremental approach for intraperiod tax allocation; (b) exceptions to accounting for basis differences when there are ownership changes in foreign investments and (c) exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses. The standard also is designed to improve financial statement preparers’ application of income tax-related guidance and simplify GAAP for (a) franchise taxes that are partially based on income; (b) transactions with a government that result in a step-up in the tax basis of goodwill; (c) separate financial statements of legal entities that are not subject to tax and (d) enacted changes in tax laws in interim periods. The standard takes effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The adoption of this standard did not have a material impact on the Company’s financial position or its results of operations.

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Principles of Consolidation and Other Matters (Policies)

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Cash and Cash Equivalents

Cash and cash equivalents primarily consist of certificates of deposit and time deposits, with original maturities of three months or less, and money market funds. The estimated fair value of the Company's cash and cash equivalents approximates their carrying value. The Company is required to maintain operating funds primarily related to regulatory requirements outside of the United States or as collateral under captive insurance arrangements.

Allowance for Credit Losses on Accounts Receivable

The Company’s policy for providing an allowance for credit losses on its accounts receivable is based on a combination of factors, including historical write-offs, aging of balances, and other qualitative and quantitative analyses.

Investments

The caption "Investment (loss) income" in the consolidated statements of income comprises realized and unrealized gains and losses from investments recognized in earnings. It includes, when applicable, other than temporary declines in the value of securities, mark-to-market increases or decreases in equity investments with readily determinable fair values and equity method gains or losses on the Company's investments in private equity funds.The Company holds investments in certain private equity funds. Investments in private equity funds are accounted for in accordance with the equity method of accounting using a consistently applied three-month lag period adjusted for any known significant changes from the lag period to the reporting date of the Company. The underlying private equity funds follow investment company accounting, where investments within the fund are carried at fair value. Investment gains or losses for its proportionate share of the change in fair value of the funds are recorded in earnings. Investments accounted for in accordance with the equity method of accounting are included in "other assets" in the consolidated balance sheets.

Income Taxes

The Company's effective tax rate for the three months ended September 30, 2022 was 24.6%, compared with 24.2% for the corresponding quarter of 2021. The effective tax rates for the nine months ended September 30, 2022 and 2021, were 24.6% and 27.1%, respectively.

The tax rates in both periods reflect the impact of discrete tax matters such as excess tax benefits related to share-based compensation, enacted tax legislation, changes in uncertain tax positions, deferred tax adjustments and

nontaxable adjustments related to contingent consideration for acquisitions. The rate in both periods also reflects tax benefits from planning that postponed the utilization of current year losses in the U.K. to a future year when the tax rate will be 25%.

The excess tax benefit related to share-based payments is the most significant discrete item for the three and nine months ended September 30, 2022, reducing the effective tax rate by 0.9% and 1.2%, respectively. The reduction for both the three and nine months ended September 30, 2021 was 0.9%.

The effective tax rate for the nine months ended September 30, 2021 reflects the charge related to re-measuring the Company’s U.K. deferred tax assets and liabilities upon the enactment of legislation increasing the U.K. corporate income tax rate from 19% to 25%, effective April 1, 2023. The Company recorded a net charge of $100 million in the second quarter of 2021, which reflected the re-measurement of the Company's U.K. deferred tax assets and liabilities upon enactment of the legislation. The re-measurement of the Company's U.K. deferred tax assets and liabilities was the most significant discrete item in the prior year, increasing the Company's effective tax rate by 3.1% for the nine month period ended September 30, 2021.

On August 16, 2022, the Inflation Reduction Act of 2022 ("IRA") was enacted into law. The Company is currently evaluating the provisions of the new legislation, the most significant of which are the corporate alternative minimum tax and the share repurchase tax. The Company does not expect the IRA to have a significant impact on its financial results of operations when it becomes effective on January 1, 2023.

The Company's tax rate reflects its income, statutory tax rates, and tax planning in the various jurisdictions in which it operates. Significant judgment is required in determining the annual effective tax rate and in evaluating uncertain tax positions.

Losses in one jurisdiction, generally, cannot offset earnings in another, and within certain jurisdictions profits and losses may not offset between entities. Consequently, losses in certain jurisdictions may require valuation allowances affecting the effective tax rate, depending on estimates of the realizability of associated deferred tax assets. The tax rate is also sensitive to changes in unrecognized tax benefits, including the impact of settled tax audits and expired statutes of limitations.

Changes in tax laws or tax rulings may have a significant impact on our effective tax rate. The Company reports a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in tax returns. The Company's gross unrecognized tax benefits were $107 million at September 30, 2022, and $94 million at December 31, 2021. It is reasonably possible that the total amount of unrecognized tax benefits will decrease between zero and approximately $48 million within the next twelve months due to settlements of audits and expirations of statutes of limitations.

Integration and Restructuring Charges

Severance and related costs are recognized based on amounts due under established severance plans or estimates of one-time benefits that will be provided. Typically, severance benefits are recognized when the impacted colleagues are notified of their expected termination and such termination is expected to occur within the legally required notification period. These costs are included in compensation and benefits in the consolidated statements of income.

Costs for real estate consolidation are recognized based on the type of cost, and the expected future use of the facility. For locations where the Company does not expect to sub-lease the property, the amortization of any Right-of-use ("ROU") asset is accelerated from the decision date to the cease use date. For locations where the Company expects to sub-lease the properties subsequent to its vacating the property, the ROU asset is reviewed for potential impairment at the earlier of the cease use date or the date a sub-lease is signed. To determine the amount of impairment, the fair value of the ROU asset is determined based on the present value of the estimated net cash flows related to the property. Contractual costs outside of the ROU asset are recognized based on the net present value of expected future cash outflows for which the Company will not receive any benefit. Such amounts are reliant on estimates of future sub-lease income to be received and future contractual costs to be incurred. These costs are included in other operating expenses in the consolidated statements of income.

Other costs related to integration and restructuring, such as moving, legal or consulting costs are recognized as incurred. These costs are included in other operating expenses in the consolidated statements of income.

Fair Value Measurement

Fair Value Hierarchy

The Company has categorized its assets and liabilities that are valued at fair value on a recurring basis into a three-level fair value hierarchy as defined by the FASB. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets and liabilities (Level 1) and lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy, for disclosure purposes, is determined based on the lowest level input that is significant to the fair value measurement. Assets and liabilities recorded in the consolidated balance sheets at fair value are categorized based on the inputs in the valuation techniques as follows:

Level 1.Assets and liabilities whose values are based on unadjusted quoted prices for identical assets or liabilities in an active market (examples include active exchange-traded equity securities and exchange-traded money market mutual funds).

Assets and liabilities measured using Level 1 inputs include exchange-traded equity securities, exchange-traded mutual funds and money market funds.

Level 2.Assets and liabilities whose values are based on the following:

a)quoted prices for similar assets or liabilities in active markets;

b)quoted prices for identical or similar assets or liabilities in non-active markets (examples include corporate and municipal bonds, which trade infrequently);

c)pricing models whose inputs are observable for substantially the full term of the asset or liability (examples include most over-the-counter derivatives, including interest rate and currency swaps); and

d)pricing models whose inputs are derived principally from or corroborated by observable market data through correlation or other means for substantially the full asset or liability (for example, certain mortgage loans).

Assets and liabilities using Level 2 inputs are related to an equity security.

Level 3.Assets and liabilities whose values are based on prices, or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the asset or liability.

Assets and liabilities measured using Level 3 inputs relate to assets and liabilities for contingent purchase consideration.

Valuation Techniques

Equity Securities, Money Market Mutual Funds and Mutual Funds – Level 1

Investments for which market quotations are readily available are valued at the sale price on their principal exchange or, for certain markets, official closing bid price. Money market funds are valued at a readily determinable price.

Contingent Purchase Consideration Assets and Liabilities – Level 3

Purchase consideration for some acquisitions and dispositions made by the Company include contingent consideration arrangements. Contingent consideration arrangements are based primarily on EBITDA or revenue targets over a period of two to four years. The fair value of the contingent purchase consideration asset and liability is estimated as the present value of future cash flows to be paid, based on projections of revenue and earnings and related targets of the acquired and disposed entities.

New Accounting Guidance

New Accounting Guidance

New Accounting Pronouncement Adopted Effective January 1, 2022:

In October 2021, the FASB issued new guidance for measuring contract assets and contract liabilities acquired in a business combination. In accordance with the new guidance, contract assets and contract liabilities should be measured in accordance with the guidance for revenue from contracts with customers as opposed to the guidance for business combinations. The guidance must be applied on a prospective basis, and is effective for fiscal years beginning after December 15, 2022, including interim periods therein. Early adoption is permitted. The Company elected to adopt this new standard effective January 1, 2022. Adoption of this guidance did not have a material impact on the Company's financial position or results of operations.    

New Accounting Pronouncements Adopted Effective January 1, 2021:

In January 2020, the FASB issued guidance that addresses accounting for the transition into and out of the equity method and measuring certain purchased options and forward contracts to acquire investments. The standard takes effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The adoption of this standard did not have a material impact on the Company’s financial position or its results of operations.

In December 2019, the FASB issued guidance related to the accounting for income taxes. The standard removes specific exceptions in the current rules and eliminates the need for an organization to analyze whether the following apply in a given period: (a) exception to the incremental approach for intraperiod tax allocation; (b) exceptions to accounting for basis differences when there are ownership changes in foreign investments and (c) exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses. The standard also is designed to improve financial statement preparers’ application of income tax-related guidance and simplify GAAP for (a) franchise taxes that are partially based on income; (b) transactions with a government that result in a step-up in the tax basis of goodwill; (c) separate financial statements of legal entities that are not subject to tax and (d) enacted changes in tax laws in interim periods. The standard takes effect for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The adoption of this standard did not have a material impact on the Company’s financial position or its results of operations.

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Revenue (Tables)

9 Months Ended

Sep. 30, 2022

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table disaggregates components of the Company's revenue:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Marsh:
EMEA	$	589	$	600	$	2,176	$	2,233
Asia Pacific	312		281		1,015		902
Latin America	118		105		340		298
Total International	1,019		986		3,531		3,433
U.S./Canada	1,451		1,366		4,263		3,894
Total Marsh	2,470		2,352		7,794		7,327
Guy Carpenter	328		314		1,849		1,697
Subtotal	2,798		2,666		9,643		9,024
Fiduciary interest income	40		4		57		12
Total Risk and Insurance Services	$	2,838	$	2,670	$	9,700	$	9,036
Mercer:
Wealth	$	561	$	613	$	1,775	$	1,861
Health	451		449		1,562		1,398
Career	272		253		679		618
Total Mercer	1,284		1,315		4,016		3,877
Oliver Wyman Group	667		610		2,029		1,813
Total Consulting	$	1,951	$	1,925	$	6,045	$	5,690

Schedule of Contract with Customer, Asset and Liability

The following table provides contract assets and contract liabilities information from contracts with customers:

(In millions)	September 30, 2022		December 31, 2021
Contract assets	$	370	$	290
Contract liabilities	$	783	$	776

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Per Share Data (Tables)

9 Months Ended

Sep. 30, 2022

Earnings Per Share [Abstract]

Schedule of Basic and Diluted EPS Calculation

Basic and Diluted EPS Calculation	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2022		2021		2022		2021
Net income before non-controlling interests	$	552	$	542	$	2,616	$	2,367
Less: Net income attributable to non-controlling interests	6		5		32		27
Net income attributable to the Company	$	546	$	537	$	2,584	$	2,340
Basic weighted average common shares outstanding	498		506		501		508
Dilutive effect of potentially issuable common shares	5		7		5		5
Diluted weighted average common shares outstanding	503		513		506		513
Average stock price used to calculate common stock equivalents	$	160.14	$	151.22	$	159.35	$	133.41

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Supplemental Disclosures to the Consolidated Statements of Cash Flows (Tables)

9 Months Ended

Sep. 30, 2022

Supplemental Cash Flow Information [Abstract]

Schedule of Additional Information Concerning Acquisitions, Interest and Income Taxes Paid

The following table provides additional information concerning acquisitions, interest and income taxes paid for the nine month periods ended September 30, 2022 and 2021.

(In millions)	2022		2021
Assets acquired, excluding cash, and cash and cash equivalents held in a fiduciary capacity	$	236	$	601
Acquisition-related deposit	24		—
Fiduciary liabilities assumed	(2)		(17)
Liabilities assumed	(28)		(59)
Contingent/deferred purchase consideration	(17)		(141)
Net cash outflow for acquisitions	$	213	$	384

(In millions)	2022		2021
Interest paid	$	388	$	407
Income taxes paid, net of refunds	$	697	$	686

The following amounts are included in the consolidated statements of cash flows as operating and financing activities:

For the Nine Months Ended September 30,
(In millions)	2022		2021
Operating:
Contingent consideration payments for prior year acquisitions	$	(38)	$	(46)
Receipt of contingent consideration for dispositions	—		19
Acquisition/disposition related net charges (credits) for adjustments	38		11
Adjustments and payments related to contingent consideration	$	—	$	(16)
Financing:
Contingent consideration for prior year acquisitions	$	(28)	$	(26)
Deferred consideration related to prior year acquisitions	(116)		(84)
Payments of deferred and contingent consideration for acquisitions	$	(144)	$	(110)
Receipt of contingent consideration for dispositions	$	3	$	71

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Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The changes, net of tax, in the balances of each component of Accumulated Other Comprehensive Income ("AOCI") for the three and nine months ended September 30, 2022 and 2021, including amounts reclassified out of AOCI, are as follows:

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of July 1, 2022	$	(2,957)	$	(2,406)	$	(5,363)
Other comprehensive income (loss) before reclassifications	182		(895)		(713)
Amounts reclassified from accumulated other comprehensive income	28		—		28
Net current period other comprehensive income (loss)	210		(895)		(685)
Balance as of September 30, 2022	$	(2,747)	$	(3,301)	$	(6,048)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of July 1, 2021	$	(4,102)	$	(1,051)	$	(5,153)
Other comprehensive income (loss) before reclassifications	115		(346)		(231)
Amounts reclassified from accumulated other comprehensive income	39		—		39
Net current period other comprehensive income (loss)	154		(346)		(192)
Balance as of September 30, 2021	$	(3,948)	$	(1,397)	$	(5,345)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of December 31, 2021	$	(3,202)	$	(1,373)	$	(4,575)
Other comprehensive income (loss) before reclassifications	371		(1,928)		(1,557)
Amounts reclassified from accumulated other comprehensive income	84		—		84
Net current period other comprehensive income (loss)	455		(1,928)		(1,473)
Balance as of September 30, 2022	$	(2,747)	$	(3,301)	$	(6,048)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Adjustments		Total
Balance as of December 31, 2020	$	(4,126)	$	(984)	$	(5,110)
Other comprehensive income (loss) before reclassifications	63		(413)		(350)
Amounts reclassified from accumulated other comprehensive income	115		—		115
Net current period other comprehensive income (loss)	178		(413)		(235)
Balance as of September 30, 2021	$	(3,948)	$	(1,397)	$	(5,345)

Schedule of Components of Comprehensive Income (Loss)

The components of other comprehensive (loss) income for the three and nine months ended September 30, 2022 and 2021 are as follows:

Three Months Ended September 30,	2022						2021
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	(895)	$	—	$	(895)	$	(346)	$	—	$	(346)
Pension/post-retirement plans:
Amortization of losses included in net periodic pension cost:
Net actuarial losses (a)	37		9		28		52		13		39
Subtotal	37		9		28		52		13		39
Foreign currency translation adjustments	247		63		184		88		21		67
Effect of remeasurement	(2)		—		(2)		64		16		48
Other adjustments	(1)		(1)		—		—		—		—
Pension/post-retirement plans gains	281		71		210		204		50		154
Other comprehensive (loss) income	$	(614)	$	71	$	(685)	$	(142)	$	50	$	(192)
(a) Included in other net benefit credits in the consolidated statements of income. Income tax expense on net actuarial losses are included in income tax expense.

Nine Months Ended September 30,	2022						2021
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	(1,928)	$	—	$	(1,928)	$	(413)	$	—	$	(413)
Pension/post-retirement plans:
Amortization of (gains) losses included in net periodic pension cost:
Prior service credits (a)	(1)		—		(1)		(1)		—		(1)
Net actuarial losses (a)	114		29		85		156		40		116
Subtotal	113		29		84		155		40		115
Foreign currency translation adjustments	499		123		376		7		1		6
Effect of remeasurement	8		1		7		77		17		60
Effect of settlement	2		—		2		2		—		2
Other adjustments	(19)		(5)		(14)		(7)		(2)		(5)
Pension/post-retirement plans gains	603		148		455		234		56		178
Other comprehensive (loss) income	$	(1,325)	$	148	$	(1,473)	$	(179)	$	56	$	(235)
(a) Included in other net benefit credits in the consolidated statements of income. Income tax expense on net actuarial losses are included in income tax expense.

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Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2022

Business Combination and Asset Acquisition [Abstract]

Schedule For Allocation of Acquisition Costs

The following table presents the preliminary allocation of purchase consideration to the assets acquired and liabilities assumed during 2022, based on the estimated fair values for the acquisitions as of their respective acquisition dates:

Acquisitions through September 30, 2022
(In millions)
Cash	$	210
Estimated fair value of deferred/contingent consideration	17
Total consideration	$	227
Allocation of purchase price:
Cash and cash equivalents	$	19
Cash and cash equivalents held in a fiduciary capacity	2
Net receivables	12
Other current assets	1
Goodwill	139
Other intangible assets	82
Fixed assets, net	2
Total assets acquired	257
Current liabilities	25
Fiduciary liabilities	2
Other liabilities	3
Total liabilities assumed	30
Net assets acquired	$	227

Schedule of Acquired Finite-Lived Intangible Assets by Major Class

The following table provides information about intangible assets acquired during 2022:

Intangible assets through September 30, 2022 (In millions)	Amount		Weighted Average Amortization Period
Client relationships	$	78	12.0 years
Other	4		4.5 years
Total intangibles	$	82

Schedule of Pro-Forma Information

The following unaudited pro-forma financial data gives effect to the acquisitions made by the Company during 2022 and 2021. In accordance with accounting guidance related to pro-forma disclosures, the information presented for acquisitions made in 2022 is as if they occurred on January 1, 2021, and reflects acquisitions made in 2021, as if they occurred on January 1, 2020. The unaudited pro-forma information includes the effects of amortization of acquired intangibles in all years. The unaudited pro-forma financial data is presented for illustrative purposes only and is not necessarily indicative of the operating results that would have been achieved if such acquisitions had occurred on the dates indicated, nor is it necessarily indicative of future consolidated results.

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2022		2021		2022		2021
Revenue	$	4,779	$	4,652	$	15,748	$	14,912
Net income attributable to the Company	$	548	$	543	$	2,594	$	2,358
Basic net income per share attributable to the Company	$	1.10	$	1.07	$	5.18	$	4.65
Diluted net income per share attributable to the Company	$	1.09	$	1.06	$	5.12	$	4.59

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Goodwill and Other Intangibles (Tables)

9 Months Ended

Sep. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill are as follows:

(In millions)	2022		2021
Balance as of January 1,	$	16,317	$	15,517
Goodwill acquired	139		374
Other adjustments(a)	(880)		(243)
Balance at September 30,	$	15,576	$	15,648

(a) Primarily reflects the impact of foreign exchange.

Schedule of Amortized Intangible Assets

The gross cost and accumulated amortization of identified intangible assets at September 30, 2022 and December 31, 2021 are as follows:

	September 30, 2022						December 31, 2021
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client relationships	$	3,759	$	1,407	$	2,352	$	4,066	$	1,334	$	2,732
Other (a)	340		289		51		365		287		78
Amortized intangibles	$	4,099	$	1,696	$	2,403	$	4,431	$	1,621	$	2,810

(a) Primarily reflects non-compete agreements, trade names and developed technology.

Schedule of Estimated Future Aggregate Amortization Expense

The estimated future aggregate amortization expense is as follows:

For the Years Ending December 31,
(In millions)	Estimated Expense
2022 (excludes amortization through September 30, 2022)	$	86
2023	301
2024	283
2025	252
2026	234
Subsequent years	1,247
Total future amortization	$	2,403

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2022

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following fair value hierarchy table presents information about the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2022 and December 31, 2021:

	Identical Assets (Level 1)				Observable Inputs (Level 2)				Unobservable Inputs (Level 3)				Total
(In millions)	09/30/22		12/31/21		09/30/22		12/31/21		09/30/22		12/31/21		09/30/22		12/31/21
Assets:
Financial instruments owned:
Exchange traded equity securities (a)	$	4	$	61	$	—	$	—	$	—	$	—	$	4	$	61
Mutual funds (a)	153		192		—		—		—		—		153		192
Money market funds (b)	89		425		—		—		—		—		89		425
Other equity investment (a)	—		—		—		8		—		—		—		8
Contingent purchase consideration assets (c)	—		—		—		—		2		5		2		5
Total assets measured at fair value	$	246	$	678	$	—	$	8	$	2	$	5	$	248	$	691
Fiduciary Assets:
U.S. treasury bills (d)	$	—	$	55	$	—	$	—	$	—	$	—	$	—	$	55
Money market funds	126		527		—		—		—		—		126		527
Total fiduciary assets measured at fair value	$	126	$	582	$	—	$	—	$	—	$	—	$	126	$	582
Liabilities:
Contingent purchase consideration liability (e)	$	—	$	—	$	—	$	—	$	328	$	352	$	328	$	352
Total liabilities measured at fair value	$	—	$	—	$	—	$	—	$	328	$	352	$	328	$	352

(a) Included in other assets in the consolidated balance sheets.

(b) Included in cash and cash equivalents in the consolidated balance sheets.

(c) Included in other receivables in the consolidated balance sheets.

(d) Maturity dates of three months or less.

(e) Included in accounts payable and accrued liabilities and other liabilities in the consolidated balance sheets.

Schedule of Changes in Fair Value of Level 3 Liabilities Representing Acquisition Related Contingent Consideration

The following table sets forth a summary of the changes in fair value of the Company’s Level 3 liabilities for the three and nine months ended September 30, 2022 and 2021:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Balance at beginning of period	$	345	$	340	$	352	$	243
Net additions	4		1		4		99
Payments	(32)		(54)		(66)		(72)
Revaluation impact	11		18		38		35
Other (a)	—		(2)		—		(2)
Balance at September 30,	$	328	$	303	$	328	$	303

(a) Primarily reflects the impact of foreign exchange.

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Leases (Tables)

9 Months Ended

Sep. 30, 2022

Leases [Abstract]

Schedule of Lease Cost and Additional Information

The following table provides additional information about the Company’s property leases:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Lease Cost:
Operating lease cost (a)	$	84	$	93	$	262	$	282
Short-term lease cost	1		1		3		4
Variable lease cost	35		38		99		101
Sublease income	(3)		(3)		(12)		(16)
Net lease cost	$	117	$	129	$	352	$	371
Other information:
Operating cash outflows from operating leases					$	286	$	310
Right of use assets obtained in exchange for new operating lease liabilities					$	148	$	282
Weighted-average remaining lease term – real estate					8.4 years		9.0 years
Weighted-average discount rate – real estate leases					2.87%		2.75%

(a) Excludes ROU asset impairment charges.

Schedule of Future Minimum Lease Payments for Operating Leases

Future minimum lease payments for the Company’s operating leases as of September 30, 2022 are as follows:

Payment Dates (In millions)	Real Estate Leases
Remainder of 2022	$	90
2023	341
2024	302
2025	272
2026	250
2027	216
Subsequent years	690
Total future lease payments	2,161
Less: Imputed interest	(243)
Total	$	1,918
Current lease liabilities	$	298
Long-term lease liabilities	1,620
Total lease liabilities	$	1,918

Note: The table excludes obligations for leases with original terms of 12 months or less which have not been recognized as a ROU asset or liability in the consolidated balance sheets.

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Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The components of the net benefit credit for defined benefit plans are as follows:

Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Service cost	$	6	$	9
Interest cost	95		87
Expected return on plan assets	(191)		(208)
Recognized actuarial loss	38		52
Net benefit credit	$	(52)	$	(60)
Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Service cost	$	21	$	29
Interest cost	294		258
Expected return on plan assets	(590)		(627)
Recognized actuarial loss	114		155
Net periodic benefit credit	$	(161)	$	(185)
Settlement loss	2		2
Net benefit credit	$	(159)	$	(183)

Amounts Recorded in the Consolidated Statements of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Compensation and benefits expense	$	6	$	9
Other net benefit credit	(58)		(69)
Net benefit credit	$	(52)	$	(60)

Amounts Recorded in the Consolidated Statements of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Compensation and benefits expense	$	21	$	29
Other net benefit credit	(180)		(212)
Net benefit credit	$	(159)	$	(183)

U.S. Plans only	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Interest cost	$	48	$	47
Expected return on plan assets	(85)		(82)
Recognized actuarial loss	19		22
Net benefit credit	$	(18)	$	(13)

U.S. Plans only	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Interest cost	$	145	$	139
Expected return on plan assets	(253)		(245)
Recognized actuarial loss	56		67
Net benefit credit	$	(52)	$	(39)

Significant non-U.S. Plans only	Pension Benefits
For the Three Months Ended September 30,
(In millions)	2022		2021
Service cost	$	6	$	9
Interest cost	47		40
Expected return on plan assets	(106)		(126)
Recognized actuarial loss	19		30
Net benefit credit	$	(34)	$	(47)

Significant non-U.S. Plans only	Pension Benefits
For the Nine Months Ended September 30,
(In millions)	2022		2021
Service cost	$	21	$	29
Interest cost	149		119
Expected return on plan assets	(337)		(382)
Recognized actuarial loss	58		88
Net periodic benefit credit	$	(109)	$	(146)
Settlement loss	2		2
Net benefit credit	$	(107)	$	(144)

Schedule of Assumptions Used

The weighted average actuarial assumptions utilized to calculate the net periodic benefit costs for the U.S. and significant non-U.S. defined benefit plans are as follows:

Combined U.S. and significant non-U.S. Plans	Pension Benefits
September 30,	2022		2021
Weighted average assumptions:
Expected return on plan assets	4.56	%	4.72	%
Discount rate	2.28	%	1.92	%
Rate of compensation increase	2.16	%	1.85	%

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Debt (Tables)

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Schedule of Outstanding Debt

The Company’s outstanding debt is as follows:

(In millions)	September 30, 2022		December 31, 2021
Short-term:
Commercial paper	$	600	$	—
Current portion of long-term debt	367		17
	967		17
Long-term:
Senior notes – 3.30% due 2023	350		349
Senior notes – 4.05% due 2023	250		249
Senior notes – 3.50% due 2024	599		599
Senior notes – 3.875% due 2024	998		997
Senior notes – 3.50% due 2025	499		498
Senior notes – 1.349% due 2026	535		629
Senior notes – 3.75% due 2026	598		598
Senior notes – 4.375% due 2029	1,499		1,499
Senior notes – 1.979% due 2030	532		614
Senior notes – 2.250% due 2030	740		739
Senior notes – 2.375% due 2031	396		397
Senior notes – 5.875% due 2033	298		298
Senior notes – 4.75% due 2039	495		495
Senior notes – 4.35% due 2047	493		493
Senior notes – 4.20% due 2048	593		593
Senior notes – 4.90% due 2049	1,238		1,238
Senior notes – 2.90% due 2051	346		346
Mortgage – 5.70% due 2035	305		316
Other	2		3
	10,766		10,950
Less current portion	367		17
	$	10,399	$	10,933

Schedule of Estimated Fair Value Of Significant Financial Instruments

Certain estimates and judgments were required to develop the fair value amounts. The fair value amounts shown below are not necessarily indicative of the amounts that the Company would realize upon disposition, nor do they indicate the Company’s intent or need to dispose of the financial instrument.

	September 30, 2022				December 31, 2021
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Short-term debt	$	967	$	965	$	17	$	17
Long-term debt	$	10,399	$	9,434	$	10,933	$	12,466

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Restructuring Costs (Tables)

9 Months Ended

Sep. 30, 2022

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Activities

Details of the restructuring activity from January 1, 2021 through September 30, 2022, are as follows:

(In millions)	Severance		Real Estate Related Costs (a)		Information Technology		Consulting and Other Outside Services		Total
Liability at 1/1/21	$	52	$	51	$	2	$	1	$	106
2021 charges	38		31		23		71		163
Cash payments	(55)		(26)		(25)		(72)		(178)
Non-cash charges	—		(22)		—		—		(22)
Liability at 12/31/21	$	35	$	34	$	—	$	—	$	69
2022 charges	6		12		7		71		96
Cash payments	(31)		(18)		(5)		(70)		(124)
Non-cash charges	—		(5)		(2)		—		(7)
Liability at 9/30/22	$	10	$	23	$	—	$	1	$	34

(a) Includes ROU and fixed asset impairments and other real estate related costs.

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Selected Information And Details For MMC's Operating Segments

Selected information about the Company’s segments for the three and nine months ended September 30, 2022 and 2021 is as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(In millions)	Revenue			Operating Income (Loss)		Revenue			Operating Income (Loss)
2022–
Risk and Insurance Services	$	2,838	(a)	$	529	$	9,700	(c)	$	2,617
Consulting	1,951		(b)	350		6,045		(d)	1,217
Total Operating Segments	4,789			879		15,745			3,834
Corporate/Eliminations	(19)			(88)		(47)			(234)
Total Consolidated	$	4,770		$	791	$	15,698		$	3,600
2021–
Risk and Insurance Services	$	2,670	(a)	$	403	$	9,036	(c)	$	2,413
Consulting	1,925		(b)	404		5,690		(d)	1,109
Total Operating Segments	4,595			807		14,726			3,522
Corporate/Eliminations	(12)			(67)		(43)			(196)
Total Consolidated	$	4,583		$	740	$	14,683		$	3,326

(a) Includes interest income on fiduciary funds of $40 million and $4 million in 2022 and 2021, respectively, and equity method income of $8 million in 2021.

(b) Includes inter-segment revenue of $19 million and $11 million in 2022 and 2021, respectively.

(c) Includes inter-segment revenue of $5 million in both 2022 and 2021, interest income on fiduciary funds of $57 million and $12 million in 2022 and 2021, respectively, and equity method income of $9 million and $25 million in 2022 and 2021, respectively. Revenue for 2022 also includes the loss on deconsolidation of the Russian businesses of $27 million. Revenue for 2021 includes $52 million primarily from the gain on the sale of the U.K. commercial networks business.

(d) Includes inter-segment revenue of $42 million and $38 million in 2022 and 2021, respectively. Revenue for 2022 also includes a gain on the sale of the Mercer U.S. affinity business of $112 million, partly offset by the loss on deconsolidation of the Russian businesses of $12 million.

Schedule of Details of Operating Segment Revenue

Details of operating segment revenue for the three and nine months ended September 30, 2022 and 2021 are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2022		2021		2022		2021
Risk and Insurance Services
Marsh	$	2,497	$	2,355	$	7,833	$	7,336
Guy Carpenter	341		315		1,867		1,700
Total Risk and Insurance Services	2,838		2,670		9,700		9,036
Consulting
Mercer	1,284		1,315		4,016		3,877
Oliver Wyman Group	667		610		2,029		1,813
Total Consulting	1,951		1,925		6,045		5,690
Total Operating Segments	4,789		4,595		15,745		14,726
Corporate Eliminations	(19)		(12)		(47)		(43)
Total	$	4,770	$	4,583	$	15,698	$	14,683

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Nature of Operations (Details) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2022 USD ($)	Sep. 30, 2022 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments (segment) | segment		2
Loss on deconsolidation of russian entities and other charges | $	$ 52

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Principles of Consolidation And Other Matters (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Operating funds related to regulatory requirements or as collateral under captive insurance arrangements	$ 295,000,000			$ 295,000,000		$ 303,000,000
Equity method investments lag period				3 months
Gain on investment income, net	(1,000,000)	$ 13,000,000		$ 27,000,000	$ 43,000,000
Loss on sale of other investments	$ (4,000,000)
Effective tax rate (as a percent)	24.60%	24.20%		24.60%	27.10%
Excess tax benefit related to share-based payments, percent	0.90%	0.90%		1.20%	0.90%
Charge related to revaluation of deferred tax assets and liabilities			$ 100,000,000
Decrease in effective tax rate due to change in U.K. corporate income tax rate, percent					3.10%
Unrecognized tax benefits	$ 107,000,000			$ 107,000,000		$ 94,000,000
Minimum
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Reasonably possible decrease in unrecognized tax benefits	0			0
Maximum
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Reasonably possible decrease in unrecognized tax benefits	$ 48,000,000			$ 48,000,000

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Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Threshold percentage of total revenue			2.00%
Revenue recognized that was included in the contract liability balance at the beginning of the period	$ 75	$ 131	$ 529	$ 511
Performance obligation satisfied in previous period	13	$ 6	74	$ 68
Mercer
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	$ 234		$ 234

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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 4,770	$ 4,583	$ 15,698	$ 14,683
Risk and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	2,838	2,670	9,700	9,036
Fiduciary interest income	40	4	57	12
Risk and Insurance Services | Total International
Disaggregation of Revenue [Line Items]
Revenue	1,019	986	3,531	3,433
Risk and Insurance Services | EMEA
Disaggregation of Revenue [Line Items]
Revenue	589	600	2,176	2,233
Risk and Insurance Services | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	312	281	1,015	902
Risk and Insurance Services | Latin America
Disaggregation of Revenue [Line Items]
Revenue	118	105	340	298
Risk and Insurance Services | U.S./Canada
Disaggregation of Revenue [Line Items]
Revenue	1,451	1,366	4,263	3,894
Consulting
Disaggregation of Revenue [Line Items]
Revenue	1,951	1,925	6,045	5,690
Consulting | Wealth
Disaggregation of Revenue [Line Items]
Revenue	561	613	1,775	1,861
Consulting | Health
Disaggregation of Revenue [Line Items]
Revenue	451	449	1,562	1,398
Consulting | Career
Disaggregation of Revenue [Line Items]
Revenue	272	253	679	618
Marsh & Guy Carpenter | Risk and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	2,798	2,666	9,643	9,024
Marsh | Risk and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	2,470	2,352	7,794	7,327
Guy Carpenter | Risk and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	328	314	1,849	1,697
Mercer | Consulting
Disaggregation of Revenue [Line Items]
Revenue	1,284	1,315	4,016	3,877
Oliver Wyman Group | Consulting
Disaggregation of Revenue [Line Items]
Revenue	$ 667	$ 610	$ 2,029	$ 1,813

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Revenue - Contract Assets and Contract Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Contract assets	$ 370	$ 290
Contract liabilities	$ 783	$ 776

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Revenue - Estimated Revenue Expected to Be Recognized Related to Performance Obligations (Details) $ in Millions	Sep. 30, 2022 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 98
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 66
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 39
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 21
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 10
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)

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Fiduciary Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Fiduciary Assets and Liabilities [Line Items]
Net uncollected premiums and claims receivable and payable	$ 12,500		$ 12,500		$ 13,000
Risk and Insurance Services
Fiduciary Assets and Liabilities [Line Items]
Interest on fiduciary funds	40	$ 4	57	$ 12
Operating Segments | Risk and Insurance Services
Fiduciary Assets and Liabilities [Line Items]
Interest on fiduciary funds	$ 40	$ 4	$ 57	$ 12

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Per Share Data (Basic and Diluted EPS Calculation Continuing Operations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income before non-controlling interests	$ 552	$ 542	$ 2,616	$ 2,367
Less: Net income attributable to non-controlling interests	6	5	32	27
Net income attributable to the Company	$ 546	$ 537	$ 2,584	$ 2,340
Basic weighted average common shares outstanding (in shares)	498	506	501	508
Dilutive effect of potentially issuable common shares (in shares)	5	7	5	5
Diluted weighted average common shares outstanding (in shares)	503	513	506	513
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 160.14	$ 151.22	$ 159.35	$ 133.41

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Supplemental Disclosures to the Consolidated Statements of Cash Flows (Additional Information Concerning Acquisitions, Interest And Income Taxes Paid) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Supplemental Cash Flow Information [Abstract]
Assets acquired, excluding cash, and cash and cash equivalents held in a fiduciary capacity	$ 236	$ 601
Acquisition-related deposit	24	0
Fiduciary liabilities assumed	(2)	(17)
Liabilities assumed	(28)	(59)
Contingent/deferred purchase consideration	(17)	(141)
Net cash outflow for acquisitions	213	384
Interest paid	388	407
Income taxes paid, net of refunds	$ 697	$ 686

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Supplemental Disclosures (Supplemental Operating and Financing Cash Flow Items) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating:
Contingent consideration payments for prior year acquisitions	$ (38)	$ (46)
Receipt of contingent consideration for dispositions	0	19
Acquisition/disposition related net charges (credits) for adjustments	38	11
Adjustments and payments related to contingent consideration	0	(16)
Financing:
Contingent consideration for prior year acquisitions	(28)	(26)
Deferred consideration related to prior year acquisitions	(116)	(84)
Payments of deferred and contingent consideration for acquisitions	(144)	(110)
Receipt of contingent consideration for dispositions	$ 3	$ 71

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Supplemental Disclosures to the Consolidated Statements of Cash Flows (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Supplemental Cash Flow Information [Abstract]
Non-cash issuance of common stock			$ 366	$ 225
Stock-based compensation expense, equity awards	$ 89	$ 87	$ 283	$ 263

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Other Comprehensive Income (Loss) (Schedule of Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 11,222
Other comprehensive loss, net of tax	$ (685)	$ (192)	(1,473)	$ (235)
Balance, end of period	9,791	9,888	9,791	9,888
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(5,363)	(5,153)	(4,575)	(5,110)
Other comprehensive income (loss) before reclassifications	(713)	(231)	(1,557)	(350)
Amounts reclassified from accumulated other comprehensive income	28	39	84	115
Other comprehensive loss, net of tax	(685)	(192)	(1,473)	(235)
Balance, end of period	(6,048)	(5,345)	(6,048)	(5,345)
Pension/Post-Retirement Plans Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,957)	(4,102)	(3,202)	(4,126)
Other comprehensive income (loss) before reclassifications	182	115	371	63
Amounts reclassified from accumulated other comprehensive income	28	39	84	115
Other comprehensive loss, net of tax	210	154	455	178
Balance, end of period	(2,747)	(3,948)	(2,747)	(3,948)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,406)	(1,051)	(1,373)	(984)
Other comprehensive income (loss) before reclassifications	(895)	(346)	(1,928)	(413)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Other comprehensive loss, net of tax	(895)	(346)	(1,928)	(413)
Balance, end of period	$ (3,301)	$ (1,397)	$ (3,301)	$ (1,397)

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Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax	$ (614)	$ (142)	$ (1,325)	$ (179)
Other comprehensive income (loss), tax	71	50	148	56
Other comprehensive loss, net of tax	(685)	(192)	(1,473)	(235)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	(895)	(346)	(1,928)	(413)
Other comprehensive income (loss), before reclassification, tax	0	0	0	0
Other comprehensive income (loss), before reclassification, net of tax	(895)	(346)	(1,928)	(413)
Reclassification from AOCI, net of tax	0	0	0	0
Other comprehensive loss, net of tax	(895)	(346)	(1,928)	(413)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, net of tax	182	115	371	63
Reclassification from AOCI, before Tax	37	52	113	155
Reclassification from AOCI, tax	9	13	29	40
Reclassification from AOCI, net of tax	28	39	84	115
Other comprehensive income (loss), before tax	281	204	603	234
Other comprehensive income (loss), tax	71	50	148	56
Other comprehensive loss, net of tax	210	154	455	178
Prior service credits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before Tax			(1)	(1)
Reclassification from AOCI, tax			0	0
Reclassification from AOCI, net of tax			(1)	(1)
Net actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before Tax	37	52	114	156
Reclassification from AOCI, tax	9	13	29	40
Reclassification from AOCI, net of tax	28	39	85	116
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	247	88	499	7
Other comprehensive income (loss), before reclassification, tax	63	21	123	1
Other comprehensive income (loss), before reclassification, net of tax	184	67	376	6
Effect of remeasurement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	(2)	64	8	77
Other comprehensive income (loss), before reclassification, tax	0	16	1	17
Other comprehensive income (loss), before reclassification, net of tax	(2)	48	7	60
Effect of settlement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax			2	2
Other comprehensive income (loss), before reclassification, tax			0	0
Other comprehensive income (loss), before reclassification, net of tax			2	2
Other adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	(1)	0	(19)	(7)
Other comprehensive income (loss), before reclassification, tax	(1)	0	(5)	(2)
Other comprehensive income (loss), before reclassification, net of tax	$ 0	$ 0	$ (14)	$ (5)

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Acquisitions and Dispositions (Narrative) (Details) $ in Millions	1 Months Ended	3 Months Ended			9 Months Ended		12 Months Ended
	Apr. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) acquisition	Sep. 30, 2021 USD ($)	Dec. 31, 2021 acquisition	Nov. 30, 2021
Business Acquisition [Line Items]
Total consideration					$ 227	$ 546
Cash paid					210	405
Estimated fair value of deferred/contingent consideration					17	141
Deferred purchase consideration from prior years' acquisitions					116	84
Contingent consideration from prior year's acquisitions					28	26
Deconsolidation of Russian businesses			$ (39)		(39)	0
U.S. Affinity Business
Business Acquisition [Line Items]
Disposal group, consideration	$ 140
Gain on disposal	$ 112
Certain Businesses Primarily in the U.S. and U.K.
Business Acquisition [Line Items]
Disposal group, consideration						84
Gain on disposal						50
Certain Businesses Primarily in Brazil
Business Acquisition [Line Items]
Disposal group, consideration					7
Marsh India Insurance Brokers Limited
Business Acquisition [Line Items]
Percentage of ownership in equity investment							92.00%	49.00%
Prior Fiscal Periods Acquisitions
Business Acquisition [Line Items]
Deferred purchase consideration from prior years' acquisitions						84
Contingent consideration from prior year's acquisitions					66	72
Pro forma revenue				$ 38		73
Operating income (loss) related to acquisitions				$ 3		$ 4
Current Fiscal Period Acquisitions
Business Acquisition [Line Items]
Total consideration					227
Cash paid					210
Estimated fair value of deferred/contingent consideration					17
Pro forma revenue		$ 16			22
Operating income (loss) related to acquisitions		$ (1)			$ (1)
Risk and Insurance Services
Business Acquisition [Line Items]
Number of acquisitions made (in acquisitions) | acquisition					8		8
Consulting
Business Acquisition [Line Items]
Number of acquisitions made (in acquisitions) | acquisition					3		1
Minimum
Business Acquisition [Line Items]
Revenue target period (in years)					2 years	2 years
Maximum
Business Acquisition [Line Items]
Revenue target period (in years)					4 years	4 years

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Acquisitions and Dispositions (Allocation Of Acquisition Costs) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Cash	$ 210	$ 405
Estimated fair value of deferred/contingent consideration	17	141
Total consideration	227	546
Allocation of purchase price:
Goodwill	15,576	$ 15,648	$ 16,317	$ 15,517
Current Fiscal Period Acquisitions
Business Acquisition [Line Items]
Cash	210
Estimated fair value of deferred/contingent consideration	17
Total consideration	227
Allocation of purchase price:
Cash and cash equivalents	19
Cash and cash equivalents held in a fiduciary capacity	2
Net receivables	12
Other current assets	1
Goodwill	139
Other intangible assets	82
Fixed assets, net	2
Total assets acquired	257
Current liabilities	25
Fiduciary liabilities	2
Other liabilities	3
Total liabilities assumed	30
Net assets acquired	$ 227

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Acquisitions and Dispositions (Acquired Finite-Lived Intangible Assets) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 82
Client relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 78
Finite-lived intangible assets, remaining amortization period	12 years
Other
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 4
Finite-lived intangible assets, remaining amortization period	4 years 6 months

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Acquisitions and Dispositions (Pro-Forma Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Revenue	$ 4,779	$ 4,652	$ 15,748	$ 14,912
Net income attributable to the Company	$ 548	$ 543	$ 2,594	$ 2,358
Basic net income per share attributable to the Company (in dollars per share)	$ 1.10	$ 1.07	$ 5.18	$ 4.65
Diluted net income per share attributable to the Company (in dollars per share)	$ 1.09	$ 1.06	$ 5.12	$ 4.59

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Goodwill and Other Intangibles (Changes in the Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Goodwill [Roll Forward]
Balance as of January 1,	$ 16,317	$ 15,517
Goodwill acquired	139	374
Other adjustments	(880)	(243)
Balance at September 30,	$ 15,576	$ 15,648

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Goodwill and Other Intangibles (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Goodwill acquired			$ 139	$ 374
Goodwill	$ 15,576	$ 15,648	15,576	15,648	$ 16,317	$ 15,517
Aggregate amortization expense	84	$ 89	258	$ 278
Risk and Insurance Services
Segment Reporting Information [Line Items]
Goodwill acquired			92
Goodwill, expected tax deductible amount	92		92
Goodwill	12,000		12,000
Consulting
Segment Reporting Information [Line Items]
Goodwill acquired			25
Goodwill, expected tax deductible amount	25		25
Goodwill	$ 3,600		$ 3,600

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Goodwill and Other Intangibles (Amortized Intangible Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 4,099	$ 4,431
Accumulated Amortization	1,696	1,621
Net Carrying Amount	2,403	2,810
Client relationships
Finite-Lived Intangible Assets [Line Items]
Gross Cost	3,759	4,066
Accumulated Amortization	1,407	1,334
Net Carrying Amount	2,352	2,732
Other
Finite-Lived Intangible Assets [Line Items]
Gross Cost	340	365
Accumulated Amortization	289	287
Net Carrying Amount	$ 51	$ 78

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Goodwill And Other Intangibles (Estimated Future Aggregate Amortization Expense) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
2022 (excludes amortization through September 30, 2022)	$ 86
2023	301
2024	283
2025	252
2026	234
Subsequent years	1,247
Net Carrying Amount	$ 2,403	$ 2,810

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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Nov. 30, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of investment	$ 222		$ 222		$ 207
Equity securities	17		17		75
Gain on equity securities			11	$ 3
Equity investments without readily determinable market value	38		38		$ 36
Proceeds from sale of other investments	62
Loss on sale of other investments	(4)
Marsh India Insurance Brokers Limited
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage of ownership in equity investment					92.00%	49.00%
Private Insurance and Consulting
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of investment	57		57		$ 58
Private Equity Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of investment	165		165		$ 149
Equity method income	$ 3	$ 13	23	$ 40
Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Proceeds from contingent purchase consideration, asset			$ 3
Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Revenue target period (in years)			2 years	2 years
Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Revenue target period (in years)			4 years	4 years

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Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Financial instruments owned:
Exchange traded equity securities	$ 17	$ 75
Fair Value, Measurements, Recurring
Financial instruments owned:
Total assets measured at fair value	248	691
Fiduciary Assets:
Fiduciary assets	126	582
Liabilities:
Total liabilities measured at fair value	328	352
Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial instruments owned:
Total assets measured at fair value	246	678
Fiduciary Assets:
Fiduciary assets	126	582
Liabilities:
Total liabilities measured at fair value	0	0
Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Financial instruments owned:
Total assets measured at fair value	0	8
Fiduciary Assets:
Fiduciary assets	0	0
Liabilities:
Total liabilities measured at fair value	0	0
Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial instruments owned:
Total assets measured at fair value	2	5
Fiduciary Assets:
Fiduciary assets	0	0
Liabilities:
Total liabilities measured at fair value	328	352
U.S. treasury bills | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	0	55
U.S. treasury bills | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	0	55
U.S. treasury bills | Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	0	0
U.S. treasury bills | Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	0	0
Money market funds | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	126	527
Money market funds | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	126	527
Money market funds | Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	0	0
Money market funds | Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	0	0
Other Assets | Fair Value, Measurements, Recurring
Financial instruments owned:
Exchange traded equity securities	4	61
Mutual funds	153	192
Other equity investment	0	8
Other Assets | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial instruments owned:
Exchange traded equity securities	4	61
Mutual funds	153	192
Other equity investment	0	0
Other Assets | Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Financial instruments owned:
Exchange traded equity securities	0	0
Mutual funds	0	0
Other equity investment	0	8
Other Assets | Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial instruments owned:
Exchange traded equity securities	0	0
Mutual funds	0	0
Other equity investment	0	0
Cash and Cash Equivalents | Fair Value, Measurements, Recurring
Financial instruments owned:
Money market funds	89	425
Cash and Cash Equivalents | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial instruments owned:
Money market funds	89	425
Cash and Cash Equivalents | Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Financial instruments owned:
Money market funds	0	0
Cash and Cash Equivalents | Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial instruments owned:
Money market funds	0	0
Other Receivables | Fair Value, Measurements, Recurring
Financial instruments owned:
Contingent purchase consideration assets	2	5
Other Receivables | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial instruments owned:
Contingent purchase consideration assets	0	0
Other Receivables | Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Financial instruments owned:
Contingent purchase consideration assets	0	0
Other Receivables | Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial instruments owned:
Contingent purchase consideration assets	2	5
Accounts Payable and Accrued Liabilities and Other Liabilities | Fair Value, Measurements, Recurring
Liabilities:
Contingent purchase consideration liability	328	352
Accounts Payable and Accrued Liabilities and Other Liabilities | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Liabilities:
Contingent purchase consideration liability	0	0
Accounts Payable and Accrued Liabilities and Other Liabilities | Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Liabilities:
Contingent purchase consideration liability	0	0
Accounts Payable and Accrued Liabilities and Other Liabilities | Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Liabilities:
Contingent purchase consideration liability	$ 328	$ 352

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Fair Value Measurements (Changes In Fair Value Of Level 3 Liabilities Representing Acquisition Related Contingent Consideration) (Details) - Contingent Consideration - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 345	$ 340	$ 352	$ 243
Net additions	4	1	4	99
Payments	(32)	(54)	(66)	(72)
Revaluation impact	11	18	38	35
Other	0	(2)	0	(2)
Balance at September 30,	$ 328	$ 303	$ 328	$ 303

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Derivatives (Details) - 9 months ended Sep. 30, 2022 $ in Millions	USD ($)	EUR (€)
Derivative [Line Items]
Net investment hedge, threshold percentage of the equity balance	80.00%
Decrease in net investment hedges | $	$ 179
Net Investment Hedging
Derivative [Line Items]
Derivative, notional amount | €		€ 1,100,000,000

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Leases (Narrative) (Details) $ in Millions	Sep. 30, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Lessee, operating lease, lease not yet commenced, amount	$ 39
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract (years)	10 years
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract (years)	25 years

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Leases (Lease Cost and Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 84	$ 93	$ 262	$ 282
Short-term lease cost	1	1	3	4
Variable lease cost	35	38	99	101
Sublease income	(3)	(3)	(12)	(16)
Net lease cost	$ 117	$ 129	352	371
Operating cash outflows from operating leases			286	310
Right of use assets obtained in exchange for new operating lease liabilities			$ 148	$ 282
Real Estate Lease
Lessee, Lease, Description [Line Items]
Weighted-average remaining lease term	8 years 4 months 24 days	9 years	8 years 4 months 24 days	9 years
Weighted-average discount rate, percent	2.87%	2.75%	2.87%	2.75%

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Leases (Future Minimum Payments for Operating Leases) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Leases [Abstract]
Remainder of 2022	$ 90
2023	341
2024	302
2025	272
2026	250
2027	216
Subsequent years	690
Total future lease payments	2,161
Less: Imputed interest	(243)
Total	1,918
Current lease liabilities	298	$ 332
Long-term lease liabilities	$ 1,620	$ 1,880

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Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Dec. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Contributions by employer		$ 28	$ 33	$ 141	$ 90
Estimated future employer contributions in current fiscal year		28		28
United States
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost recognized		39	37	122	115
United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost recognized		$ 31	$ 33	$ 108	$ 106
United Kingdom | Non-U.S. Plans | Geographic Concentration Risk
Defined Benefit Plan Disclosure [Line Items]
Concentration risk percentage	81.00%
Equity Funds | United States
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation, percentage		60.00%		60.00%
Actual asset allocation percentage of equity		61.00%		61.00%
Equity Funds | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation, percentage		14.00%		14.00%
Actual asset allocation percentage of equity		17.00%		17.00%
Fixed Income Funds | United States
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation, percentage		40.00%		40.00%
Actual asset allocation percentage of equity		39.00%		39.00%
Fixed Income Funds | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation, percentage		86.00%		86.00%
Actual asset allocation percentage of equity		83.00%		83.00%

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Retirement Benefits (Schedule Of Defined Benefit Plan Net Periodic Benefit Cost Combined U.S. and Significant Non-U.S. Plans) (Details) - Pension Benefits - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6	$ 9	$ 21	$ 29
Interest cost	95	87	294	258
Expected return on plan assets	(191)	(208)	(590)	(627)
Recognized actuarial loss	38	52	114	155
Net periodic credit			(161)	(185)
Settlement loss			2	2
Net benefit credit	(52)	(60)	(159)	(183)
United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	48	47	145	139
Expected return on plan assets	(85)	(82)	(253)	(245)
Recognized actuarial loss	19	22	56	67
Net periodic credit	(18)	(13)	(52)	(39)
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	9	21	29
Interest cost	47	40	149	119
Expected return on plan assets	(106)	(126)	(337)	(382)
Recognized actuarial loss	19	30	58	88
Net periodic credit			(109)	(146)
Settlement loss			2	2
Net benefit credit	$ (34)	$ (47)	$ (107)	$ (144)

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Retirement Benefits (Schedule Of Defined Benefit Plan Net Periodic Benefit Cost Amounts Recorded in Consolidated Statement of Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense	$ (791)	$ (740)	$ (3,600)	$ (3,326)
Other net benefit credit	(57)	(69)	(178)	(211)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense	6	9	21	29
Other net benefit credit	(58)	(69)	(180)	(212)
Net benefit credit	$ (52)	$ (60)	$ (159)	$ (183)

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Retirement Benefits (Schedule Of Defined Benefit Plan Weighted Average Assumption Used In Calculating Net Periodic Benefit Cost) (Details) - Pension Benefits	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Weighted average assumptions:
Expected return on plan assets	4.56%	4.72%
Discount rate	2.28%	1.92%
Rate of compensation increase	2.16%	1.85%

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Debt (Schedule Of Outstanding Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Apr. 09, 2021	Apr. 08, 2021
Debt Instrument [Line Items]
Current portion of long-term debt	$ 367	$ 17
Short-term debt	967	17
Long-term debt	10,766	10,950
Long-term debt, net	10,399	10,933
Commercial Paper
Debt Instrument [Line Items]
Short-term debt	600	0	$ 2,000	$ 1,500
3.30% Senior Debt Obligations Due 2023
Debt Instrument [Line Items]
Long-term debt	$ 350	349
Interest rate	3.30%
4.05% Senior Debt Obligations Due 2023
Debt Instrument [Line Items]
Long-term debt	$ 250	249
Interest rate	4.05%
3.50% Senior Debt Obligations Due 2024
Debt Instrument [Line Items]
Long-term debt	$ 599	599
Interest rate	3.50%
3.875% Senior Debt Obligations Due 2024
Debt Instrument [Line Items]
Long-term debt	$ 998	997
Interest rate	3.875%
3.50% Senior Debt Obligations Due 2025
Debt Instrument [Line Items]
Long-term debt	$ 499	498
Interest rate	3.50%
1.349% Senior Debt Obligations Due 2026
Debt Instrument [Line Items]
Long-term debt	$ 535	629
Interest rate	1.349%
3.75% Senior Debt Obligations Due 2026
Debt Instrument [Line Items]
Long-term debt	$ 598	598
Interest rate	3.75%
4.375% Senior Debt Obligations Due 2029
Debt Instrument [Line Items]
Long-term debt	$ 1,499	1,499
Interest rate	4.375%
1.979% Senior Debt Obligations Due 2030
Debt Instrument [Line Items]
Long-term debt	$ 532	614
Interest rate	1.979%
2.250% Senior Debt Obligations Due 2030
Debt Instrument [Line Items]
Long-term debt	$ 740	739
Interest rate	2.25%
2.375% Senior Debt Obligations Due 2031
Debt Instrument [Line Items]
Long-term debt	$ 396	$ 397
Interest rate	2.375%	2.375%
5.875% Senior Debt Obligations Due 2033
Debt Instrument [Line Items]
Long-term debt	$ 298	$ 298
Interest rate	5.875%
4.75% Senior Debt Obligations Due 2039
Debt Instrument [Line Items]
Long-term debt	$ 495	495
Interest rate	4.75%
4.35% Senior Debt Obligation Due 2047
Debt Instrument [Line Items]
Long-term debt	$ 493	493
Interest rate	4.35%
4.20% Senior Debt Obligations Due 2048
Debt Instrument [Line Items]
Long-term debt	$ 593	593
Interest rate	4.20%
4.90% Senior Debt Obligations Due 2049
Debt Instrument [Line Items]
Long-term debt	$ 1,238	1,238
Interest rate	4.90%
2.90% Senior Debt Obligations Due 2051
Debt Instrument [Line Items]
Long-term debt	$ 346	$ 346
Interest rate	2.90%	2.90%
5.70% Mortgage Due 2035
Debt Instrument [Line Items]
Long-term debt	$ 305	$ 316
Interest rate	5.70%
Other
Debt Instrument [Line Items]
Long-term debt	$ 2	$ 3

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Debt (Narrative) (Details) - USD ($)		1 Months Ended	9 Months Ended
	Apr. 15, 2021	Dec. 31, 2021	Sep. 30, 2022	May 31, 2022	Apr. 09, 2021	Apr. 08, 2021
Debt Instrument [Line Items]
Commercial paper outstanding			$ 600,000,000
Other Debt Facilities
Debt Instrument [Line Items]
Long-term line of credit		$ 0	0
Debt instrument, unused borrowing capacity		$ 508,000,000	$ 507,000,000
2.375% Senior Debt Obligations Due 2031
Debt Instrument [Line Items]
Interest rate		2.375%	2.375%
2.90% Senior Debt Obligations Due 2051
Debt Instrument [Line Items]
Interest rate		2.90%	2.90%
2.75% Senior Debt Obligations Due January 2022
Debt Instrument [Line Items]
Interest rate		2.75%
Repayments of debt		$ 500,000,000
Commercial Paper
Debt Instrument [Line Items]
Short-term debt		0	$ 600,000,000		$ 2,000,000,000	$ 1,500,000,000
Effective interest rate (percent)			3.39%
Revolving Credit Facility | Uncommitted Credit Facility
Debt Instrument [Line Items]
Debt facilities, maximum borrowing capacity				$ 250,000,000
Long-term line of credit			$ 0
Revolving Credit Facility | New Facility
Debt Instrument [Line Items]
Debt facilities, maximum borrowing capacity			$ 2,800,000,000
Term of debt			5 years
Long-term line of credit			$ 0
Senior Notes
Debt Instrument [Line Items]
Repayments of debt	$ 500,000,000
Senior Notes | 2.375% Senior Debt Obligations Due 2031
Debt Instrument [Line Items]
Debt instrument face amount		400,000,000
Senior Notes | 2.90% Senior Debt Obligations Due 2051
Debt Instrument [Line Items]
Debt instrument face amount		$ 350,000,000

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Debt (Estimated Fair Value of Significant Financial Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term debt	$ 967	$ 17
Long-term debt	10,399	10,933
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term debt	965	17
Long-term debt	$ 9,434	$ 12,466

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Restructuring Costs (Narrative) (Details) - Jardine Lloyd Thompson Group plc - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Costs incurred		$ 96	$ 163
Acquisition Related
Restructuring Cost and Reserve [Line Items]
Costs incurred	$ 38	96
Acquisition Related | Corporate
Restructuring Cost and Reserve [Line Items]
Costs incurred	15	36
Acquisition Related | Risk and Insurance Services
Restructuring Cost and Reserve [Line Items]
Costs incurred	18	44
Acquisition Related | Consulting
Restructuring Cost and Reserve [Line Items]
Costs incurred	$ 5	$ 16

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Restructuring Costs (Restructuring Activities) (Details) - Jardine Lloyd Thompson Group plc - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Restructuring Reserve [Roll Forward]
Liability at beginning of period	$ 69	$ 106
Restructuring charges	96	163
Cash payments	(124)	(178)
Non-cash charges	(7)	(22)
Liability at end of period	34	69
Severance
Restructuring Reserve [Roll Forward]
Liability at beginning of period	35	52
Restructuring charges	6	38
Cash payments	(31)	(55)
Non-cash charges	0	0
Liability at end of period	10	35
Real Estate Related Costs
Restructuring Reserve [Roll Forward]
Liability at beginning of period	34	51
Restructuring charges	12	31
Cash payments	(18)	(26)
Non-cash charges	(5)	(22)
Liability at end of period	23	34
Information Technology
Restructuring Reserve [Roll Forward]
Liability at beginning of period	0	2
Restructuring charges	7	23
Cash payments	(5)	(25)
Non-cash charges	(2)	0
Liability at end of period	0	0
Consulting and Other Outside Services
Restructuring Reserve [Roll Forward]
Liability at beginning of period	0	1
Restructuring charges	71	71
Cash payments	(70)	(72)
Non-cash charges	0	0
Liability at end of period	$ 1	$ 0

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Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended		9 Months Ended
	Sep. 30, 2022	Jul. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Mar. 23, 2022	Dec. 31, 2021
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased (in shares)				5.3
Purchase of treasury shares			$ 1,600,000,000	$ 734,000,000
Stock-based compensation, shares issued during period (in shares)			3.1	3.1
Dividends per share (usd per share)	$ 0.590
Increase to quarterly dividend, percent		10.00%
Approved quarterly dividend (usd per share)		$ 0.590	$ 0.535
Common Stock
Equity, Class of Treasury Stock [Line Items]
Share repurchases program, authorized amount (up to)					$ 5,000,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 4,700,000,000		$ 4,700,000,000			$ 1,300,000,000
Common stock repurchased (in shares)			10.1

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Claims, Lawsuits And Other Contingencies (Details) - Jardine Lloyd Thompson Group plc case in Thousands, £ in Millions, $ in Millions	1 Months Ended				48 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 GBP (£)	May 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2018 case	Sep. 30, 2022 USD ($)	Sep. 30, 2022 GBP (£)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 GBP (£)	Feb. 28, 2019 USD ($)	Feb. 28, 2019 GBP (£)
Loss Contingencies [Line Items]
Individual cases analyzed | case					14
Loss contingency accrual						$ 6	£ 6.0	$ 210	£ 155.0	$ 77	£ 59.0
United States
Loss Contingencies [Line Items]
Loss contingency, damages sought, value				$ 29
Columbia
Loss Contingencies [Line Items]
Loss contingency, damages sought, value			$ 2
Loss contingency, loss in period	$ 11	£ 7.9

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Segment Information (Selected Information And Details For MMC's Operating Segments) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenue	$ 4,770		$ 4,583	$ 15,698	$ 14,683
Operating Income (Loss)	791		740	3,600	3,326
Loss on deconsolidation of russian businesses		$ 39		39	0
Risk and Insurance Services
Segment Reporting Information [Line Items]
Revenue	2,838		2,670	9,700	9,036
Interest on fiduciary funds	40		4	57	12
Consulting
Segment Reporting Information [Line Items]
Revenue	1,951		1,925	6,045	5,690
Operating Segments
Segment Reporting Information [Line Items]
Revenue	4,789		4,595	15,745	14,726
Operating Income (Loss)	879		807	3,834	3,522
Operating Segments | Risk and Insurance Services
Segment Reporting Information [Line Items]
Revenue	2,838		2,670	9,700	9,036
Operating Income (Loss)	529		403	2,617	2,413
Interest on fiduciary funds	40		4	57	12
Equity method income (loss)			8	9	25
Gain (loss) on consolidation of business					52
Loss on deconsolidation of russian businesses				27
Operating Segments | Consulting
Segment Reporting Information [Line Items]
Revenue	1,951		1,925	6,045	5,690
Operating Income (Loss)	350		404	1,217	1,109
Loss on deconsolidation of russian businesses				12
Corporate/Eliminations
Segment Reporting Information [Line Items]
Revenue	(19)		(12)	(47)	(43)
Operating Income (Loss)	(88)		(67)	(234)	(196)
Intersegment Eliminations | Risk and Insurance Services
Segment Reporting Information [Line Items]
Revenue				5	5
Intersegment Eliminations | Consulting
Segment Reporting Information [Line Items]
Revenue	$ 19		$ 11	42	$ 38
Gain on disposal				$ 112

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Segment Information (Details of Operating Segment Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenue	$ 4,770	$ 4,583	$ 15,698	$ 14,683
Risk and Insurance Services
Segment Reporting Information [Line Items]
Revenue	2,838	2,670	9,700	9,036
Risk and Insurance Services | Marsh
Segment Reporting Information [Line Items]
Revenue	2,470	2,352	7,794	7,327
Risk and Insurance Services | Guy Carpenter
Segment Reporting Information [Line Items]
Revenue	328	314	1,849	1,697
Consulting
Segment Reporting Information [Line Items]
Revenue	1,951	1,925	6,045	5,690
Consulting | Mercer
Segment Reporting Information [Line Items]
Revenue	1,284	1,315	4,016	3,877
Consulting | Oliver Wyman Group
Segment Reporting Information [Line Items]
Revenue	667	610	2,029	1,813
Operating Segments
Segment Reporting Information [Line Items]
Revenue	4,789	4,595	15,745	14,726
Operating Segments | Risk and Insurance Services
Segment Reporting Information [Line Items]
Revenue	2,838	2,670	9,700	9,036
Operating Segments | Risk and Insurance Services | Marsh
Segment Reporting Information [Line Items]
Revenue	2,497	2,355	7,833	7,336
Operating Segments | Risk and Insurance Services | Guy Carpenter
Segment Reporting Information [Line Items]
Revenue	341	315	1,867	1,700
Operating Segments | Consulting
Segment Reporting Information [Line Items]
Revenue	1,951	1,925	6,045	5,690
Operating Segments | Consulting | Mercer
Segment Reporting Information [Line Items]
Revenue	1,284	1,315	4,016	3,877
Operating Segments | Consulting | Oliver Wyman Group
Segment Reporting Information [Line Items]
Revenue	667	610	2,029	1,813
Corporate/Eliminations
Segment Reporting Information [Line Items]
Revenue	$ (19)	$ (12)	$ (47)	$ (43)