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, 2020

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 23, 2020, there were outstanding 507,190,569 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 financial and operational impact of COVID-19 on our revenue and ability to generate new business, our overall level of profitability and cash flow, and our liquidity, including the timeliness and collectability of our receivables;

•the impact of disruption in the credit or financial markets, or changes to our credit ratings, including as a result of COVID-19, on our ability to access capital or repay our significant outstanding indebtedness on favorable terms and our compliance with the covenants contained in the agreements that govern our indebtedness;

•the impact from lawsuits, other contingent liabilities and loss contingencies arising from errors and omissions, breach of fiduciary duty or other claims against us, including claims related to pandemic coverage;

•the impact of investigations, reviews, or other activity by regulatory or law enforcement authorities, including the ongoing U.K. FCA review of legacy JLT enhanced transfer value advice;

•the financial and operational impact of complying with laws and regulations where we operate and the risks of noncompliance with such laws, including anti-corruption laws such as the U.S. Foreign Corrupt Practices Act, U.K. Anti-Bribery Act, trade sanctions regimes and cybersecurity and data privacy regulations such as the E.U.’s General Data Protection Regulation;

•our ability to manage risks associated with our investment management and related services business, particularly in the context of volatile equity markets caused by COVID-19, including our ability to execute timely trades in light of increased trading volume and to manage potential conflicts of interest between investment consulting and fiduciary management services;

•our ability to compete effectively and adapt to changes in the competitive environment, including to respond to technological change, disintermediation, digital disruption and other types of innovation;

•our ability to attract and retain industry leading talent;

•our ability to maintain adequate safeguards to protect the security of our information systems and confidential, personal or proprietary information, including those in the existing JLT information systems, particularly given the increased risk of phishing and other cybersecurity attacks or unauthorized dissemination of information caused by remote work arrangements;

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

•our ability to successfully recover if we experience a business continuity problem due to cyberattack, natural disaster or otherwise; and

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

The factors identified above are not exhaustive. Marsh & McLennan Companies and its subsidiaries 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 Companies 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.

2

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	40
	OF OPERATIONS
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	56
ITEM 4.	CONTROLS & PROCEDURES	57
PART II. OTHER INFORMATION		58
ITEM 1.	LEGAL PROCEEDINGS	58
ITEM 1A.	RISK FACTORS	58
ITEM 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS	59
ITEM 3.	DEFAULTS UPON SENIOR SECURITIES	59
ITEM 4.	MINE SAFETY DISCLOSURE	59
ITEM 5.	OTHER INFORMATION	59
ITEM 6.	EXHIBITS	59

3

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 amounts)	2020		2019		2020		2019
Revenue	$	3,968	$	3,968	$	12,808	$	12,388
Expense:
Compensation and benefits	2,495		2,437		7,479		7,256
Other operating expenses	933		1,064		2,834		3,047
Operating expenses	3,428		3,501		10,313		10,303
Operating income	540		467		2,495		2,085
Other net benefit credits	60		69		187		203
Interest income	1		4		5		34
Interest expense	(128)		(133)		(387)		(394)
Cost of extinguishment of debt	—		—		—		(32)
Investment (loss) income	(14)		7		(47)		20
Acquisition related derivative contracts	—		—		—		(8)
Income before income taxes	459		414		2,253		1,908
Income tax expense	139		108		586		531
Net income before non-controlling interests	320		306		1,667		1,377
Less: Net income attributable to non-controlling interests	4		3		25		26
Net income attributable to the Company	$	316	$	303	$	1,642	$	1,351
Net income per share attributable to the Company:
Basic	$	0.62	$	0.60	$	3.25	$	2.67
Diluted	$	0.62	$	0.59	$	3.21	$	2.64
Average number of shares outstanding:
Basic	507		506		506		506
Diluted	512		511		511		511
Shares Outstanding at September 30,	507		505		507		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)	2020		2019		2020		2019
Net income before non-controlling interests	$	320	$	306	$	1,667	$	1,377
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	500		(475)		(200)		(366)
(Loss) gain related to pension/post-retirement plans	(73)		82		136		102
Other comprehensive income (loss), before tax	427		(393)		(64)		(264)
Income tax (benefit) expense on other comprehensive income	(7)		11		29		20
Other comprehensive income (loss), net of tax	434		(404)		(93)		(284)
Comprehensive income (loss)	754		(98)		1,574		1,093
Less: comprehensive income attributable to non-controlling interest	4		3		25		26
Comprehensive income (loss) attributable to the Company	$	750	$	(101)	$	1,549	$	1,067

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 amounts)	(Unaudited) September 30, 2020		December 31, 2019
ASSETS
Current assets:
Cash and cash equivalents	$	2,388	$	1,155
Receivables
Commissions and fees	4,658		4,608
Advanced premiums and claims	121		123
Other	604		645
	5,383		5,376
Less-allowance for credit losses	(147)		(140)
Net receivables	5,236		5,236
Other current assets	688		677
Total current assets	8,312		7,068
Goodwill	15,034		14,671
Other intangible assets	2,711		2,774
Fixed assets (net of accumulated depreciation and amortization of $2,113 at September 30, 2020 and $2,001 at December 31, 2019)	864		858
Pension related assets	1,825		1,632
Right of use assets	1,884		1,921
Deferred tax assets	623		676
Other assets	1,428		1,757
	$	32,681	$	31,357

 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 amounts)	(Unaudited) September 30, 2020		December 31, 2019
LIABILITIES AND EQUITY
Current liabilities:
Short-term debt	$	1,216	$	1,215
Accounts payable and accrued liabilities	2,662		2,746
Accrued compensation and employee benefits	1,762		2,197
Current lease liabilities	335		342
Accrued income taxes	318		179
Dividends payable	237		—
Total current liabilities	6,530		6,679
Fiduciary liabilities	8,765		7,344
Less – cash and investments held in a fiduciary capacity	(8,765)		(7,344)
	—		—
Long-term debt	11,532		10,741
Pension, post-retirement and post-employment benefits	2,163		2,336
Long-term lease liabilities	1,902		1,926
Liabilities for errors and omissions	352		335
Other liabilities	1,450		1,397
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, 2020 and December 31, 2019	561		561
Additional paid-in capital	882		862
Retained earnings	15,902		15,199
Accumulated other comprehensive loss	(5,148)		(5,055)
Non-controlling interests	161		150
	12,358		11,717
Less – treasury shares, at cost, 53,626,539 shares at September 30, 2020 and 57,013,097 shares at December 31, 2019	(3,606)		(3,774)
Total equity	8,752		7,943
	$	32,681	$	31,357

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

7

MARSH & McLENNAN COMPANIES, INC. AND SUBSIDIARIES                        

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

For the Nine Months Ended September 30,
(In millions)	2020		2019
Operating cash flows:
Net income before non-controlling interests	$	1,667	$	1,377
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization of fixed assets and capitalized software	282		245
Amortization of intangible assets	265		235
Non cash lease expense	241		236
Adjustments and payments related to contingent consideration liability	(14)		(9)
Charge for early extinguishment of debt	—		32
Provision for deferred income taxes	6		95
Loss (gain) on investments	47		(20)
Net loss on disposition of assets	9		36
Share-based compensation expense	219		184
Change in fair value of acquisition-related derivative contracts	—		8
Changes in assets and liabilities:
Net receivables	77		(84)
Other current assets	(14)		30
Other assets	69		(59)
Accounts payable and accrued liabilities	(144)		(126)
Accrued compensation and employee benefits	(431)		(281)
Accrued income taxes	150		120
Contributions to pension and other benefit plans in excess of current year credit	(240)		(269)
Other liabilities	74		(149)
Operating lease liabilities	(254)		(240)
Effect of exchange rate changes	(10)		(70)
Net cash provided by operations	1,999		1,291
Financing cash flows:
Purchase of treasury shares	—		(300)
Net increase in commercial paper	—		325
Net borrowings from term-loan and credit facilities	1,000		300
Proceeds from issuance of debt	737		6,459
Repayments of debt	(1,011)		(760)
Payments for early extinguishment of debt	—		(585)
Purchase of non-controlling interests	(3)		(75)
Acquisition-related derivative payments	—		(337)
Shares withheld for taxes on vested units – treasury shares	(131)		(89)
Issuance of common stock from treasury shares	98		132
Payments of deferred and contingent consideration for acquisitions	(125)		(60)
Distributions of non-controlling interests	(26)		(18)
Dividends paid	(702)		(655)
Net cash (used for) provided by financing activities	(163)		4,337
Investing cash flows:
Capital expenditures	(278)		(284)
Net sales of long-term investments	102		193
Purchase of equity investment	—		(91)
Proceeds from sales of fixed assets	3		4
Dispositions	93		225
Acquisitions	(559)		(5,500)
Other, net	(7)		(51)
Net cash used for investing activities	(646)		(5,504)
Effect of exchange rate changes on cash and cash equivalents	43		23
Increase in cash and cash equivalents	1,233		147
Cash and cash equivalents at beginning of period	1,155		1,066
Cash and cash equivalents at end of period	$	2,388	$	1,213

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

8

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 amounts)	2020		2019		2020		2019
COMMON STOCK
Balance, beginning and end of period	$	561	$	561	$	561	$	561
ADDITIONAL PAID-IN CAPITAL
Balance, beginning of period	$	814	$	736	$	862	$	817
Change in accrued stock compensation costs	69		65		6		23
Issuance of shares under stock compensation plans and employee stock purchase plans	(1)		(5)		15		(44)
Other	—		—		(1)		—
Balance, end of period	$	882	$	796	$	882	$	796
RETAINED EARNINGS
Balance, beginning of period	$	16,060	$	14,741	$	15,199	$	14,347
Net income attributable to the Company	316		303		1,642		1,351
Dividend equivalents declared	(3)		(2)		(9)		(6)
Dividends declared	(471)		(231)		(930)		(881)
Balance, end of period	$	15,902	$	14,811	$	15,902	$	14,811
ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
Balance, beginning of period	$	(5,582)	$	(4,527)	$	(5,055)	$	(4,647)
Other comprehensive income (loss), net of tax	434		(404)		(93)		(284)
Balance, end of period	$	(5,148)	$	(4,931)	$	(5,148)	$	(4,931)
TREASURY SHARES
Balance, beginning of period	$	(3,627)	$	(3,446)	$	(3,774)	$	(3,567)
Issuance of shares under stock compensation plans and employee stock purchase plans	21		29		168		250
Purchase of treasury shares	—		(200)		—		(300)
Balance, end of period	$	(3,606)	$	(3,617)	$	(3,606)	$	(3,617)
NON-CONTROLLING INTERESTS
Balance, beginning of period	$	166	$	272	$	150	$	73
Net income attributable to non-controlling interests	4		3		25		26
Net non-controlling interests acquired / (disposed)	—		(100)		(1)		95
Distributions and other changes	(9)		2		(13)		(17)
Balance, end of period	$	161	$	177	$	161	$	177
TOTAL EQUITY	$	8,752	$	7,797	$	8,752	$	7,797
Dividends declared per share	$	0.93	$	0.455	$	1.840	$	1.740

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

9

MARSH & McLENNAN COMPANIES, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.     Nature of Operations

Marsh & McLennan Companies, Inc. and its consolidated subsidiaries (the "Company") is a global professional services firm offering clients advice and solutions in risk, strategy and people. Its businesses include: Marsh, the insurance broker, intermediary and risk advisor; Guy Carpenter, the risk and reinsurance specialist; Mercer, the provider of HR and Investment related financial advice and services; and Oliver Wyman Group, the management, economic and brand consultancy. With 76,000 colleagues worldwide and annual revenue of $17 billion, the Company provides analysis, advice and transactional capabilities to clients in more than 130 countries.

Business Update Related To COVID-19

The Coronavirus (COVID-19) pandemic has impacted essentially every geography in which the Company operates. Governments implemented various restrictions around the world, including closure of non-essential businesses, travel, shelter-in-place requirements for citizens and other restrictions.

Through the end of the third quarter, the vast majority of the Company’s colleagues have continued working in a remote work environment, with minimal disruption to the Company as a whole and its ability to serve clients. The safety and well-being of our colleagues continues to be our first priority.

As many countries have begun to re-open their economies, there are various conditions imposed by each jurisdiction, and new restrictions may be imposed based on local circumstances. The Company has re-opened offices in various locations around the world, while ensuring that it continues to adhere to guidelines and orders issued by national, state and local governments. The timing of office re-openings will vary based on the conditions and restrictions in each location, but it remains uncertain the extent to which colleagues will return to offices for the remainder of the year and into 2021. However, the Company expects it will continue its ability to service clients effectively while colleagues remain in a remote work environment.

The ultimate extent of the COVID-19 impact to the Company will depend on numerous evolving factors and future developments that it is not able 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-Q for the quarter ended March 31, 2020.

JLT Acquisition

On April 1, 2019, the Company completed its acquisition (the "Transaction") of all of the outstanding shares of Jardine Lloyd Thompson Group plc ("JLT"), a public company organized under the laws of England and Wales. JLT's results of operations for the three and nine month periods ended September 30, 2020 are included in the Company's results of operations. The Company's results for the nine months ended September 30, 2019 do not reflect JLT’s results of operations for the three months ended March 31, 2019 and therefore may affect comparability.

2.     Principles of Consolidation and Other Matters

The consolidated financial statements included herein have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission. While certain information and footnote 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 for interim filings, 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, 2019 (the "2019 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 three and nine month periods ended September 30, 2020 and 2019.

10

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:

•the allowance for current expected credit losses on receivables,

•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,

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

•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. Management has made estimates of the impact of COVID-19 within the Company’s financial statements and there may be changes to those estimates in future periods. In most situations where estimates, fair values or recoverability of assets is dependent upon short or long term projections of cash flows, revenues or earnings before interest, taxes, depreciation and amortization ("EBITDA"), the Company has based its projections assuming the gradual lifting of global lockdowns through the rest of 2020 and into 2021. The Company has also considered potential impacts to its customer base in various industries and geographies. The ultimate extent to which the COVID-19 pandemic will directly or indirectly impact the Company’s businesses, results of operations and financial condition will depend on future developments that are highly uncertain, including new information that may emerge concerning COVID-19 and the actions taken to contain it or treat it, and the economic impact on local, regional, national and international customers and markets. 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, 2020, the Company maintained $247 million compared to $197 million at December 31, 2019 related to these regulatory requirements.

Allowance for Current Expected Credit Losses on Accounts Receivable

The Company’s policy for providing an allowance for current expected credit losses (“CECL”) on its accounts receivable is based on management’s best estimate of amounts that will be uncollectible primarily based on the Company’s historical experience of collections in its various businesses and other events that may affect the net realizable value of receivables. The charge related to expected credit losses was immaterial to the consolidated statement of income in the three and nine month periods ended September 30, 2020.

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 that are accounted for under 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 the Company's proportionate share of the change in fair value of the funds are recorded in earnings. Investments

11

accounted for using the equity method of accounting are included in "other assets" in the consolidated balance sheets.

The Company recorded net investment losses of $14 million and $47 million for the three and nine month periods ended September 30, 2020 compared to net investment income of $7 million and $20 million for the three and nine month periods ended September 30, 2019. The net investment loss reported in the third quarter of 2020 is primarily due to the mark-to-market change related to the Company's investment in Alexander Forbes ("AF"). The net investment loss for the nine months ended September 30, 2020 also includes a loss of $23 million from the sale of shares of AF during the second quarter of 2020, as well as losses related to its private equity fund investments. The three and nine month periods ended September 30, 2019 include gains of $4 million and $10 million related to mark-to-market changes in equity securities and gains of $3 million and $10 million related to investments in private equity funds and other investments.

Income Taxes

The Company's effective tax rate in the third quarter of 2020 was 30.3% compared with 26.0% in the third quarter of 2019. The effective tax rates for the first nine months of 2020 and 2019 were 26.0% and 27.8%. The rate in the third quarter and first nine months of 2020 reflects costs of re-measuring the Company’s U.K. deferred tax liability for legislation that cancelled a scheduled 2% reduction in the U.K. corporate income tax rate, partially offset by tax benefits related to a new international funding structure implemented to facilitate global staffing and contracting.

The rate in the first nine months of 2019 reflects discrete adjustments related to the JLT acquisition, including tax on the disposition of JLT’s aerospace business and nondeductible expenses incurred in connection with the JLT Transaction. The tax rates in both periods reflect the impact of discrete tax items such as excess tax benefits related to share-based compensation, changes in tax legislation, changes in uncertain tax positions, deferred tax adjustments and nontaxable adjustments to contingent acquisition consideration.

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 limitation.

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 increased from $86 million at December 31, 2019 to $102 million at September 30, 2020 due to net changes to tax positions of prior years and current year accruals, offset by expirations of statutes of limitation. It is reasonably possible that the total amount of unrecognized tax benefits will decrease between zero and approximately $22 million within the next twelve months due to settlements of audits and expirations of statutes of limitation.

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 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 right-of-use 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 right-of-use asset is determined based on the present value of the estimated net cash flows related to the property. Contractual costs outside of the right-of-use 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.

12

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. To achieve that 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. Under the accounting guidance, 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.

The Company's revenue recognition guidance is provided in more detail in Note 2 of the consolidated financial statements and the notes thereto included in 2019 Form 10-K for the year ended December 31, 2019.

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

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Marsh:
EMEA	$	536	$	536	$	1,887	$	1,821
Asia Pacific	254		242		790		698
Latin America	93		110		283		304
Total International	883		888		2,960		2,823
U.S./Canada	1,126		1,014		3,271		2,972
Total Marsh	2,009		1,902		6,231		5,795
Guy Carpenter	274		273		1,534		1,328
Subtotal	2,283		2,175		7,765		7,123
Fiduciary interest income	8		31		40		80
Total Risk and Insurance Services	$	2,291	$	2,206	$	7,805	$	7,203
Mercer:
Wealth	$	566	$	592	$	1,719	$	1,748
Health	430		441		1,348		1,341
Career	220		247		549		606
Total Mercer	1,216		1,280		3,616		3,695
Oliver Wyman	480		505		1,458		1,563
Total Consulting	$	1,696	$	1,785	$	5,074	$	5,258

The Company recognizes commission revenue from arrangements for a significant portion of its brokerage arrangements at a point in time at 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 schedule provides contract assets and contract liabilities information from contracts with customers.

(In millions)	September 30, 2020		December 31, 2019
Contract Assets	$	257	$	207
Contract Liabilities	$	648	$	593

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. Contract assets are included in other current

13

assets in the Company's consolidated balance sheet. Contract liabilities primarily relate to the advance consideration received from customers. Contract liabilities are included in current liabilities in the Company's consolidated balance sheet. Revenue recognized in the first nine months of 2020 and 2019 that was included in the contract liability balance at the beginning of each of those years was $420 million and $378 million, respectively.

The amount of revenue recognized in the first nine months of 2020 and 2019 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 $84 million and $67 million, respectively.

The Company applies the practical expedient and therefore 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 $46 million for Marsh, $181 million for Mercer and $2 million for Oliver Wyman. The Company expects revenue in 2021, 2022, 2023, 2024 and 2025 and beyond of $123 million, $63 million, $27 million, $13 million and $3 million, respectively, related to these performance obligations.

4.     Fiduciary Assets and Liabilities

In its capacity as an insurance broker or agent, 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. Risk and Insurance Services revenue includes interest on fiduciary funds ("fiduciary interest income") of $8 million and $40 million for the three and nine month periods ended September 30, 2020, respectively, and $31 million and $80 million for the three and nine month periods ended September 30, 2019, respectively. The decrease in 2020 compared to 2019 reflects the impact of lower interest rates partially offset by a higher level of average invested funds. The Consulting segment recorded fiduciary interest income of less than $1 million for the three months and $1 million for nine month periods ended September 30, 2020, respectively, and less than $1 million and $2 million for the three and nine month periods ended September 30, 2019, respectively. Since fiduciary assets 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 $11.4 billion at September 30, 2020 and $8.9 billion at December 31, 2019. 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.

14

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 amounts)	2020		2019		2020		2019
Net income before non-controlling interests	$	320	$	306	$	1,667	$	1,377
Less: Net income attributable to non-controlling interests	4		3		25		26
Net income attributable to the Company	$	316	$	303	$	1,642	$	1,351
Basic weighted average common shares outstanding	507		506		506		506
Dilutive effect of potentially issuable common shares	5		5		5		5
Diluted weighted average common shares outstanding	512		511		511		511
Average stock price used to calculate common stock equivalents	$	114.64	$	99.97	$	107.64	$	94.75

6.    Supplemental Disclosures to the Consolidated Statements of Cash Flows

The following schedule provides additional information concerning acquisitions, interest and income taxes paid for the nine-month periods ended September 30, 2020 and 2019.

(In millions)	2020		2019
Assets acquired, excluding cash	$	795	$	8,619
Liabilities assumed	(73)		(2,758)
Non-controlling interests assumed	—		(295)
Contingent/deferred purchase consideration	(163)		(66)
Net cash outflow for current year acquisitions	$	559	$	5,500

(In millions)	2020		2019
Interest paid	$	437	$	387
Income taxes paid, net of refunds	$	414	$	442

The classification of contingent consideration in the statement of cash flows is determined by whether the payment 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 a financing activity. The Company paid deferred and contingent consideration of $125 million for the nine months ended September 30, 2020. This consisted of deferred purchase consideration related to prior years' acquisitions of $60 million and contingent consideration of $65 million. For the nine months ended September 30, 2019, the Company paid deferred and contingent consideration of $60 million, consisting of deferred purchase consideration related to prior years' acquisitions of $37 million and contingent consideration of $23 million.

The following amounts are included in the operating section of the consolidated statements of cash flows. For the nine months ended September 30, 2020, the Company recorded an expense for adjustments to contingent consideration liabilities of $22 million and made contingent consideration payments of $36 million. For the nine months ended September 30, 2019, the Company recorded an expense for adjustments to contingent consideration liabilities of $26 million and made contingent consideration payments of $35 million.

The Company had non-cash issuances of common stock under its share-based payment plan of $217 million and $164 million for the nine months ended September 30, 2020 and 2019, respectively. The Company recorded stock-based compensation expense for equity awards related to restricted stock units, performance stock units and stock options of $219 million and $184 million for the nine-month periods ended September 30, 2020 and 2019, respectively.

15

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-month periods ended September 30, 2020 and 2019, including amounts reclassified out of AOCI, are as follows:

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of July 1, 2020	$	(3,346)	$	(2,236)	$	(5,582)
Other comprehensive (loss) income before reclassifications	(94)		497		403
Amounts reclassified from accumulated other comprehensive income	31		—		31
Net current period other comprehensive (loss) income	(63)		497		434
Balance as of September 30, 2020	$	(3,409)	$	(1,739)	$	(5,148)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of July 1, 2019	$	(2,942)	$	(1,585)	$	(4,527)
Other comprehensive income (loss) before reclassifications	56		(475)		(419)
Amounts reclassified from accumulated other comprehensive income	15		—		15
Net current period other comprehensive income (loss)	71		(475)		(404)
Balance as of September 30, 2019	$	(2,871)	$	(2,060)	$	(4,931)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of December 31, 2019	$	(3,512)	$	(1,543)	$	(5,055)
Other comprehensive income (loss) before reclassifications	12		(196)		(184)
Amounts reclassified from accumulated other comprehensive income	91		—		91
Net current period other comprehensive income (loss)	103		(196)		(93)
Balance as of September 30, 2020	$	(3,409)	$	(1,739)	$	(5,148)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of December 31, 2018	$	(2,953)	$	(1,694)	$	(4,647)
Other comprehensive income (loss) before reclassifications	26		(366)		(340)
Amounts reclassified from accumulated other comprehensive income	56		—		56
Net current period other comprehensive income (loss)	82		(366)		(284)
Balance as of September 30, 2019	$	(2,871)	$	(2,060)	$	(4,931)

16

The components of other comprehensive income (loss) for the three and nine-month periods ended September 30, 2020 and 2019 are as follows:

Three Months Ended September 30,	2020						2019
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	500	$	3	$	497	$	(475)	$	—	$	(475)
Pension/post-retirement plans:
Amortization of (gains) losses included in net periodic pension cost:
Prior service credits (a)	—		—		—		(1)		(1)		—
Net actuarial losses (a)	40		9		31		25		6		19
Effect of remeasurement (a)	—		—		—		(8)		(2)		(6)
Effect of settlement (a)	—		—		—		2		—		2
Subtotal	40		9		31		18		3		15
Foreign currency translation adjustments	(113)		(19)		(94)		64		8		56
Pension/post-retirement plans (losses) gains	(73)		(10)		(63)		82		11		71
Other comprehensive income (loss)	$	427	$	(7)	$	434	$	(393)	$	11	$	(404)
(a) Components of net periodic pension cost are 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,	2020						2019
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	(200)	$	(4)	$	(196)	$	(366)	$	—	$	(366)
Pension/post-retirement plans:
Amortization of (gains) losses included in net periodic pension cost:
Prior service credits (a)	(1)		—		(1)		(2)		(1)		(1)
Net actuarial losses (a)	120		28		92		77		18		59
Effect of remeasurement (a)	—		—		—		(9)		(2)		(7)
Effect of settlement (a)	—		—		—		6		1		5
Subtotal	119		28		91		72		16		56
Foreign currency translation adjustments	17		5		12		30		4		26
Pension/post-retirement plans gains	136		33		103		102		20		82
Other comprehensive income (loss)	$	(64)	$	29	$	(93)	$	(264)	$	20	$	(284)
(a) Components of net periodic pension cost are 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.

17

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. 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 four acquisitions during the first nine months of 2020.

•January – Marsh & McLennan Agency ("MMA") acquired Momentous Insurance Brokerage Inc., a California-based full-service risk management and employee benefits firm specializing in high net worth private client services and insurance solutions for the entertainment industry, and Ironwood Insurance Services, LLC, an Atlanta-based broker that provides commercial property/casualty insurance, employee benefits, and private client solutions to mid-size businesses and individuals across the U.S.

•April – MMA acquired Assurance Holdings, Inc., an Illinois-based full service independent brokerage agency providing business insurance, employee benefits, private client insurance, and retirement services to businesses and individuals across the U.S.

•June - MMA acquired Nico Insurance Services, Inc., a California-based agency providing employee benefits solutions to groups and individuals.

Total purchase consideration for acquisitions made during the nine months ended September 30, 2020 was $742 million, which consisted of cash paid of $579 million and deferred purchase consideration and estimated contingent consideration of $163 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. The Company also paid $60 million of deferred purchase consideration and $101 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 2020 based on the estimated fair values for the acquisitions as of their respective acquisition dates:

Acquisitions through September 30, 2020
(In millions)
Cash	579
Estimated fair value of deferred/contingent consideration	163
Total consideration	$	742
Allocation of purchase price:
Cash and cash equivalents	20
Accounts receivable, net	27
Fixed assets, net	15
Other intangible assets	280
Goodwill	462
Other assets	11
Total assets acquired	815
Current liabilities	22
Other liabilities	51
Total liabilities assumed	73
Net assets acquired	$	742

18

The purchase price allocation above 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.

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 chart provides information about intangible assets acquired during 2020:

Intangible assets through September 30, 2020 (In millions)	Amount		Weighted Average Amortization Period
Client relationships	$	257	13.3 years
Other	23		4.5 years
	$	280

Dispositions

During the first nine months of 2020, the Company sold certain businesses primarily in the U.S., U.K. and Canada for cash proceeds of approximately $93 million. There were no material dispositions made in the third quarter of 2020.

At December 31, 2019, the Company owned approximately 443 million shares of the common stock of Alexander Forbes ("AF"), a South African company listed on the Johannesburg Stock Exchange, which was accounted for under the equity method of accounting. In February 2020, the Company sold approximately 49 million shares of the common stock of AF, and in May 2020, sold an additional 193 million shares to third parties, leaving the Company with an investment of approximately 201 million shares of the common stock of AF at September 30, 2020. Upon completion of the May transaction, the investment in AF is accounted at fair value, with investment gains and losses recorded as investment income in the consolidated statement of income.

Prior-Year Acquisitions

On April 1, 2019, the Company completed the JLT Transaction and purchased all of the outstanding shares of JLT. Under the terms of the Transaction, JLT shareholders received £19.15 in cash for each JLT share, which valued JLT’s existing issued and to be issued share capital at approximately £4.3 billion (or approximately $5.6 billion based on an exchange rate of U.S. $1.31:£1). The Company also assumed existing JLT long-term indebtedness of approximately $1 billion. The Company implemented the Transaction by way of a scheme of arrangement under Part 26 of the United Kingdom Companies Act 2006, as amended.

The Risk and Insurance Services segment completed five other acquisitions during 2019.

•February – MMA acquired Bouchard Insurance, Inc., a Florida-based full service agency and Employee Benefits Group, Inc., a Maryland-based independent insurance agency.

•April – MMA acquired Lovitt & Touche, Inc., an Arizona-based insurance agency and The Centurion Group, LLC, a Pennsylvania-based retirement consulting, asset management and benefit plan advisory firm.

•October – MMA acquired Benefits Reports Insurance Services, Inc., a Massachusetts-based independent insurance agency.

Total purchase consideration for acquisitions made during the first nine months of 2019 was $5,925 million, which consisted of cash paid of $5,859 million and deferred purchase consideration and estimated contingent consideration of $66 million. Contingent consideration arrangements are primarily based on EBITDA or revenue targets over a period of two to four years. The fair value of the contingent consideration was based on projected revenue or EBITDA of the acquired entities. Estimated fair values of assets acquired and liabilities assumed are subject to adjustment when purchase accounting is finalized. For the first nine months of 2019, the Company also paid $37 million of deferred purchase consideration and $58 million of contingent consideration related to acquisitions made in prior years.

Subsequent to the JLT acquisition, the Company purchased the outstanding non-controlling interests of several JLT subsidiaries for net cash payments of approximately $75 million.

In January 2019, Marsh increased its equity ownership in Marsh India from 26% to 49%. Marsh India is accounted for under the equity method.

19

Prior year dispositions

During the third quarter of 2019, the Company completed the sale of a U.S. Specialty business at Marsh and a U.S. large market health and defined benefit business at Mercer for cash proceeds of approximately $60 million. Also, on June 1, 2019, the Company completed its disposition of JLT’s global aerospace business for cash proceeds of $165 million and contingent consideration receivable of approximately $65 million, based on the aerospace business achieving certain revenue milestones in 2020. The aerospace business was divested as part of the European Commission's approval of the JLT Transaction.

Pro-Forma Information

The following unaudited pro-forma financial data gives effect to the acquisitions made by the Company during 2020 and 2019. In accordance with accounting guidance related to pro-forma disclosures, the information presented for current year acquisitions is as if they occurred on January 1, 2019 and reflects acquisitions made in 2019 as if they occurred on January 1, 2018. The unaudited pro-forma information adjusts for the effects of amortization of acquired intangibles and additional interest expense related to the issuance of debt related to the JLT Transaction. 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 figures)	2020		2019		2020		2019
Revenue	$	3,968	$	4,016	$	12,859	$	12,979
Net income attributable to the Company	$	316	$	307	$	1,644	$	1,453
Basic net income per share attributable to the Company	$	0.62	$	0.61	$	3.25	$	2.87
Diluted net income per share attributable to the Company	$	0.62	$	0.60	$	3.22	$	2.84

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, 2020 include approximately $52 million and $115 million of revenue, respectively, and operating loss of $8 million and operating income of $3 million, respectively, for acquisitions made in 2020. The consolidated statements of income for the three and nine month periods ended September 30, 2019 included approximately $352 million and $848 million, respectively, of revenue, and operating losses of $69 million and $51 million, respectively, related to acquisitions made in 2019.

20

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 2019, the Company elected to do a quantitative assessment and determined that goodwill was not impaired, as the fair value of each reporting unit exceeded its carrying value by a substantial margin. In 2020, the Company elected to perform a qualitative impairment assessment. 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 estimates, 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. The Company completed its qualitative assessment in the third quarter of 2020 and concluded that a quantitative goodwill impairment test was not required in 2020 and that goodwill was not impaired.

Other intangible assets that are not deemed to have an indefinite life are amortized over their estimated lives and reviewed for impairment upon the occurrence of certain triggering events in accordance with applicable accounting literature. The Company does not have any indefinite lived intangible assets.

Changes in the carrying amount of goodwill are as follows:

September 30,
(In millions)	2020		2019
Balance as of January 1,	$	14,671	$	9,599
Goodwill acquired	462		4,962
Other adjustments(a)	(99)		(275)
Balance at September 30,	$	15,034	$	14,286

(a) Primarily reflects the impact of foreign exchange and dispositions.

The entire amount of goodwill acquired of $462 million in 2020 is related to the Risk and Insurance Services segment, of which $140 million is deductible for tax purposes. The goodwill arising from the acquisitions 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.

Goodwill allocable to the Company’s reportable segments at September 30, 2020 is as follows: Risk and Insurance Services, $11 billion and Consulting, $4 billion.

The gross cost and accumulated amortization of identified intangible assets at September 30, 2020 and December 31, 2019 are as follows:

	September 30, 2020						December 31, 2019
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client Relationships	$	3,644	$	1,095	$	2,549	$	3,494	$	897	$	2,597
Other (a)	381		219		162		380		203		177
Amortized intangibles	$	4,025	$	1,314	$	2,711	$	3,874	$	1,100	$	2,774

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

21

Aggregate amortization expense for the nine months ended September 30, 2020 and 2019 was $265 million and $235 million, respectively. The estimated future aggregate amortization expense is as follows:

For the Years Ending December 31,
(In millions)	Estimated Expense
2020 (excludes amortization through September 30, 2020)	$	92
2021	351
2022	323
2023	299
2024	286
Subsequent years	1,360
	$	2,711

The developments in the COVID-19 pandemic have resulted in uncertainty in the global economy and volatility in the equity markets. The Company considered whether such events would indicate that identified intangible assets and other long lived assets may not be recoverable. Based on its analysis, the Company concluded that the current events and circumstances related to the COVID-19 pandemic do not indicate that identified intangibles are not recoverable.

22

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);

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 mutual funds are valued using a valuation technique that results in price per share at $1.00.

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.

23

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, 2020 and December 31, 2019.

	Identical Assets (Level 1)				Observable Inputs (Level 2)				Unobservable Inputs (Level 3)				Total
(In millions)	09/30/20		12/31/19		09/30/20		12/31/19		09/30/20		12/31/19		09/30/20		12/31/19
Assets:
Financial instruments owned:
Exchange traded equity securities(a)	$	45	$	4	$	—	$	—	$	—	$	—	$	45	$	4
Mutual funds(a)	167		166		—		—		—		—		167		166
Money market mutual funds(b)	861		55		—		—		—		—		861		55
Other equity investment(a)	—		—		8		8		—		—		8		8
Contingent purchase consideration asset(c)	—		—		—		—		67		84		67		84
Total assets measured at fair value	$	1,073	$	225	$	8	$	8	$	67	$	84	$	1,148	$	317
Fiduciary Assets:
U.S. Treasury Bills	$	25	$	40	$	—	$	—	$	—	$	—	$	25	$	40
Money market funds	176		360		—		—		—		—		176		360
Total fiduciary assets measured at fair value	$	201	$	400	$	—	$	—	$	—	$	—	$	201	$	400
Liabilities:
Contingent purchase consideration liability(d)	$	—	$	—	$	—	$	—	$	230	$	225	$	230	$	225
Total liabilities measured at fair value	$	—	$	—	$	—	$	—	$	230	$	225	$	230	$	225

(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 at September 30, 2020 and other assets at December 31, 2019 in the consolidated balance sheets.

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

The Level 3 assets in the above chart reflect contingent purchase consideration from the sale of businesses during 2019. The change in the asset from December 31, 2019 is primarily due to the net impact of accretion and adjustments to the fair value of the acquisition related asset of approximately $14 million. A 5% increase or decrease in the projections used to estimate the contingent consideration would result in a corresponding increase or decrease of the asset of approximately $6 million.

During the nine-month period ended September 30, 2020, there were no assets or liabilities that were transferred between any of the levels.

The table below sets forth a summary of the changes in fair value of the Company’s Level 3 liabilities for the three and nine month periods ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Balance at beginning of period	$	233	$	196	$	225	$	508
Net Additions	—		(7)		96		33
Payments	(23)		(13)		(101)		(58)
Revaluation Impact	18		6		8		26
Change in fair value of the FX contract	—		—		—		(325)
Other (a)	2		3		2		1
Balance at September 30,	$	230	$	185	$	230	$	185

(a) Primarily reflects the impact of foreign exchange.

As set forth in the table above, based on the Company's ongoing assessment of the fair value of contingent consideration, the Company recorded a net increase in the estimated fair value of such liabilities for prior-period

24

acquisitions of $8 million in the nine-month period ended September 30, 2020. A 5% increase in the projections used to estimate the contingent consideration would increase the liability by approximately $9 million. A 5% decrease would decrease the liability by approximately $21 million.

Long-Term Investments

The Company holds investments in certain private equity investments, public companies and private companies that are accounted for using the equity method of accounting. The carrying value of these investments was $265 million and $434 million at September 30, 2020 and December 31, 2019, respectively.

Investments in Public and Private Companies

The Company has other investments in private insurance and consulting companies with a carrying value of $169 million and $183 million at September 30, 2020 and December 31, 2019, respectively.

The Company’s equity investments in insurance and consulting companies 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.

Private Equity Investments

The Company's investments in private equity funds were $96 million and $107 million at September 30, 2020 and December 31, 2019, 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 (loss) 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 $2 million and losses of $6 million from these investments for the three and nine month periods ended September 30, 2020, respectively, compared to net investment gains of $3 million and $10 million for the same periods in 2019.

Other Investments

At September 30, 2020 and December 31, 2019, the Company held certain equity investments with readily determinable market values of $58 million and $19 million, respectively. The Company recorded investment losses on these investments of $16 million and $19 million in the three and nine month periods ended September 30, 2020, respectively, and investment gains of $4 million and $10 million for the same periods in 2019. The Company also held investments without readily determinable market values of $43 million and $67 million at September 30, 2020 and December 31, 2019, respectively.

At December 31, 2019, the Company owned approximately 443 million shares of the common stock of AF, a South African company listed on the Johannesburg Stock Exchange, which was accounted for under the equity method of accounting. In February 2020, the Company sold approximately 49 million shares of the common stock of AF, and in May 2020, sold an additional 193 million shares to third parties, leaving the Company with an investment of approximately 201 million shares of the common stock of AF at September 30, 2020. Upon completion of the May transaction, the investment in AF is accounted at fair value, with investment gains and losses recorded as investment income (loss) in the consolidated statement of income. The fair value of AF at September 30, 2020 was $41 million.

In March 2019, the Company disposed of its investment in BenefitFocus for total proceeds of approximately $132 million. The Company received $115 million in the first quarter of 2019 and $17 million in April 2019.

During the second quarter of 2019, the Company disposed of its investment in Payscale and received approximately $47 million.

25

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 foreign currency translation gains (losses) in the consolidated balance sheet. The Company concluded that the hedge continues to be highly effective as of September 30, 2020. During 2020, the U.S. dollar value of the euro notes increased $60 million through September 30 due to the impact of foreign exchange rates, with a corresponding decrease to foreign currency translation gains (losses).

JLT Acquisition Related Derivatives

On September 20, 2018, the Company entered into the FX Contract to purchase £5.2 billion at a contracted exchange rate, to hedge the risk of appreciation of the GBP-denominated purchase price of JLT, which was settled on April 1, 2019, upon the closing of the JLT Transaction. The FX Contract did not qualify for hedge accounting treatment under applicable accounting guidance, which required the Company to record the change in the fair value of the FX Contract on each reporting date to the statement of income. The Company recorded a gain of $31 million for the nine month period ended September 30, 2019 related to the settlement of the FX contract.

In connection with the JLT Transaction, to hedge the economic risk of changes in future interest rates prior to its issuance of fixed rate debt, in the fourth quarter of 2018 the Company entered into treasury lock contracts related to $2 billion of senior notes issued in January 2019. The contracts were not designated as an accounting hedge. In January 2019, upon issuance of the $5 billion of senior notes, the Company settled the treasury lock derivatives and made a payment to its counter party for $122 million. A charge of $6 million was recorded in the first quarter of 2019 related to the settlement of the Treasury lock derivatives.

In March 2019, the Company issued €1.1 billion of senior notes related to the JLT Transaction. See Note 14 for additional information related to the Euro senior note issuances. In connection with the senior note issuances, the Company entered into a forward exchange contract to hedge the economic risk of changes in foreign exchange rates from the issuance date to settlement date of the Euro senior notes. The Company recorded a charge of $7.3 million in the consolidated statement of income for the period ended September 30, 2019 upon settlement of this contract.

JLT Derivatives and Hedging Activity

A significant portion of JLT's outstanding senior notes at the time of completion of the JLT Transaction were denominated in U.S. dollars. In order to hedge its exposure against the risk of fluctuations between the British pound and the U.S. dollar, JLT entered into foreign exchange contracts as well as interest rate swaps to protect against the risk of changes in interest rates, which were designated as fair value hedges. In June, 2019, the Company redeemed these U.S. dollar denominated senior notes and settled the related derivative contracts. The offsetting changes in fair value of the debt and the change in fair value of the derivative contracts were recorded in the consolidated statement of income for the nine month period ended September 30, 2019.

JLT also had a number of foreign exchange contracts to hedge the risk of foreign exchange movements between the U.S. dollar and the British pound, related to JLT’s U.S. dollar denominated revenue in the U.K. Prior to the acquisition, these derivative contracts were designated as cash flow hedges. Upon completion of the JLT Transaction, these derivative contracts were not re-designated as cash flow hedges by the Company. The contracts were settled in June 2019. The change in fair value between the acquisition date and the settlement date resulted in a charge of $26 million for the nine month period ended September 30, 2019. The charge is recorded as a change in fair value of acquisition related derivative contracts in the consolidated statement of income.

26

12.    Leases

A lease is defined as a party obtaining the right to use an asset legally owned by another party. The Company determines if an arrangement is a lease at inception. For operating leases entered into prior to January 1, 2019, the Right-of-Use ("ROU") assets and operating lease liabilities are recognized in the balance sheet based on the present value of the remaining future minimum payments over the lease term from the implementation date of the standard, January 1, 2019. The ROU asset was adjusted for unamortized lease incentives and restructuring liabilities that were reported, prior to January 1, 2019, as other liabilities in the consolidated balance sheet. For leases entered into subsequent to January 1, 2019, the operating lease ROU asset and operating lease liabilities are based on the present value of minimum payments over the lease term at commencement date of the lease.

The Company uses discount rates to determine the present value of future lease payments. The Company primarily uses its incremental borrowing rate adjusted to reflect a secured rate, based on the information available for leases, including the lease term and interest rate environment in the country in which the lease exists. The lease terms used to calculate the ROU asset and lease liability may include options to extend or terminate when it is reasonably certain that the Company will exercise that option.

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. Leases are negotiated with third-parties and, in some instances contain renewal, expansion and termination options. The Company also subleases certain office facilities to third-parties when the Company no longer utilizes the space. None of the Company’s leases restrict the payment of dividends or the incurrence of debt or additional lease obligations, or contain significant purchase options. In addition to the base rental costs, our lease agreements generally provide for rent escalations resulting from increased assessments for real estate taxes and other charges. A portion of our real estate lease portfolio contains base rents subject to annual changes in the Consumer Price Index ("CPI") as well as charges for operating expenses which are reimbursable to the landlord based on actual usage. Changes to the CPI and payments for such reimbursable operating expenses are considered variable and are recognized as variable lease costs in the period in which the obligation for those payments is incurred. Approximately 99% of the Company’s lease obligations are for the use of office space. All of the Company’s material leases are operating leases.

As a practical expedient, the Company has elected an accounting policy not to separate non-lease components from lease components and instead account as a single lease component. The Company has also elected not to recognize ROU assets and lease liabilities for leases that, at the commencement date, are for 12 months or less.

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

	Three Months ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020			2019
Lease Cost:
Operating lease cost	$	99	$	94	$	288		$	276
Short-term lease cost	1		4		3			7
Variable lease cost	28		37		92			113
Sublease income	(5)		(4)		(15)			(12)
Net lease cost	$	123	$	131	$	368		$	384
Other information:
Operating cash outflows from operating leases					$	306		$	288
Right of use assets obtained in exchange for new operating lease liabilities					$	162		$	112
Weighted-average remaining lease term – real estate					8.44 years			8.86 years
Weighted-average discount rate – real estate leases					3.02		%	3.09		%

27

Future minimum lease payments for the Company’s operating leases as of September 30, 2020 are as follows:

Payment Dates (In millions)	Real Estate Leases
Remainder of 2020	$	112
2021	390
2022	363
2023	315
2024	270
2025	242
Subsequent years	855
Total future lease payments	2,547
Less: Imputed interest	(310)
Total	$	2,237
Current lease liabilities	$	335
Long-term lease liabilities	1,902
Total lease liabilities	$	2,237

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

As of September 30, 2020, the Company had additional operating real estate leases that had not yet commenced of $16 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 some of 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 in accordance with applicable law.

The target asset allocation for the Company's U.S. plans was 64% equities and equity alternatives and 36% fixed income. At September 30, 2020 the actual allocation for the Company's U.S. Plan was 63% equities and equity alternatives and 37% fixed income. The target allocation for the U.K. Plans at September 30, 2020 was 33% equities and equity alternatives and 67% fixed income. At September 30, 2020, the actual allocation for the U.K. Plans was 33% equities and equity alternatives and 67% fixed income. The Company's U.K. Plans comprised approximately 81% of non-U.S. plan assets at December 31, 2019. 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.

JLT Defined Benefit Pension Plans

As part of the JLT Transaction, the Company has assumed responsibility for a number of pension plans throughout the world, with $255 million of net pension liabilities as of December 31, 2019 (approximately $1,003 million in liabilities and $748 million of plan assets), the most significant of which is the JLT U.K. Plan. The JLT U.K. Plan has a defined benefit section which was frozen to future accrual in 2006 and a defined contribution section. The assets of the scheme are held in a trustee administered fund separate from the Company.

28

The components of the net periodic benefit cost for defined benefit and other post-retirement plans are as follows:

Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	10	$	10	$	—	$	—
Interest cost	112		120		1		1
Expected return on plan assets	(212)		(214)		—		—
Recognized actuarial loss (credit)	40		25		(1)		(1)
Net periodic benefit credit	$	(50)	$	(59)	$	—	$	—
Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	27	$	28	$	—	$	—
Interest cost	322		360		2		2
Expected return on plan assets	(629)		(644)		—		—
Amortization of prior service credit	—		—		(1)		(1)
Recognized actuarial loss (credit)	120		77		(1)		(1)
Net periodic benefit credit	$	(160)	$	(179)	$	—	$	—
Settlement loss	—		4		—		—
Total credit	$	(160)	$	(175)	$	—	$	—

Amounts Recorded in the Consolidated Statement of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Compensation and benefits expense (Operating income)	$	10	$	10	$	—	$	—
Other net benefit credits	(60)		(69)		—		—
Total credit	$	(50)	$	(59)	$	—	$	—

Amounts Recorded in the Consolidated Statement of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Compensation and benefits expense (Operating income)	$	27	$	28	$	—	$	—
Other net benefit credits	(187)		(203)		—		—
Total credit	$	(160)	$	(175)	$	—	$	—

U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Interest cost	$	53	$	61	$	1	$	1
Expected return on plan assets	(86)		(86)		—		—
Recognized actuarial loss (credit)	18		11		(1)		(1)
Net periodic benefit credit	$	(15)	$	(14)	$	—	$	—

29

U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Interest cost	$	160	$	181	$	1	$	1
Expected return on plan assets	(259)		(257)		—		—
Recognized actuarial loss (credit)	54		33		(1)		(1)
Net periodic benefit credit	$	(45)	$	(43)	$	—	$	—

Significant non-U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	10	$	10	$	—	$	—
Interest cost	59		59		—		—
Expected return on plan assets	(126)		(128)		—		—
Recognized actuarial loss	22		14		—		—
Net periodic benefit credit	$	(35)	$	(45)	$	—	$	—

Significant non-U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	27	$	28	$	—	$	—
Interest cost	162		179		1		1
Expected return on plan assets	(370)		(387)		—		—
Amortization of prior service credit	—		—		(1)		(1)
Recognized actuarial loss	66		44		—		—
Net periodic benefit credit	$	(115)	$	(136)	$	—	$	—
Settlement loss	—		4		—		—
Total credit	$	(115)	$	(132)	$	—	$	—

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				Post-retirement Benefits
September 30,	2020		2019		2020		2019
Weighted average assumptions:
Expected return on plan assets	5.31	%	5.74	%	—		—
Discount rate	2.57	%	3.48	%	2.72	%	3.65	%
Rate of compensation increase	1.76	%	1.74	%	—		—

The Company made approximately $81 million of contributions to its U.S. and non-U.S. defined benefit pension plans for the nine months ended September 30, 2020. The Company expects to contribute approximately $63 million to its U.S. and non-U.S. defined benefit pension plans during the remainder of 2020.

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 was $110 million and $106 million for the nine months ended September 30, 2020 and 2019, respectively. The cost of the U.K. DC Plans was $94 million and $74 million for the nine months ended September 30, 2020 and 2019, respectively.

30

14.    Debt

The Company’s outstanding debt is as follows:

(In millions)	September 30, 2020		December 31, 2019
Short-term:
Current portion of long-term debt	$	1,216	$	1,215
	1,216		1,215
Long-term:
Senior notes – 2.35% due 2020	—		500
Senior notes – 3.50% due 2020	700		698
Senior notes – 4.80% due 2021	500		499
Senior notes - Floating rate due 2021	299		298
Senior notes – 2.75% due 2022	499		498
Senior notes – 3.30% due 2023	349		349
Senior notes – 4.05% due 2023	249		249
Senior notes – 3.50% due 2024	598		597
Senior notes – 3.875% due 2024	995		994
Senior notes – 3.50% due 2025	497		497
Senior notes – 1.349% due 2026	641		609
Senior notes – 3.75% due 2026	597		597
Senior notes – 4.375% due 2029	1,499		1,499
Senior notes – 1.979% due 2030	635		607
Senior notes – 2.250% due 2030	737		—
Senior notes – 5.875% due 2033	298		298
Senior notes – 4.75% due 2039	495		494
Senior notes – 4.35% due 2047	493		492
Senior notes – 4.20% due 2048	592		592
Senior notes – 4.90% due 2049	1,237		1,237
Mortgage – 5.70% due 2035	334		345
Term loan facility - two year	500		—
Other	4		7
	12,748		11,956
Less current portion	1,216		1,215
	$	11,532	$	10,741

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

The Company has established a short-term debt financing program of up to $1.5 billion through the issuance of commercial paper. The proceeds from the issuance of commercial paper are used for general corporate purposes. The Company had no commercial paper outstanding at September 30, 2020.

Credit Facilities

The Company and certain of its foreign subsidiaries have a multi-currency five-year unsecured revolving credit facility of $1.8 billion. The interest rate on this facility is based on LIBOR plus a fixed margin which varies with the Company's credit ratings. This facility expires in October 2023 and requires the Company to maintain certain coverage and leverage ratios which are tested quarterly. The facility includes a provision for determining a LIBOR successor rate in the event LIBOR reference rates are no longer available. In such case, the rate would be determined using an alternate reference rate that has been broadly accepted by the syndicated loan market in the United States in lieu of LIBOR (the “LIBOR successor rate”). If no LIBOR successor rate has been determined, the rate will be based on the higher of the rate announced publicly by Citibank, New York, NY, as its base rate or the fed funds rate plus a fixed margin. The Company borrowed $1 billion under this facility in the first quarter of 2020, which

31

was repaid in full during the second quarter of 2020. There were no borrowings outstanding under this facility at September 30, 2020.

In January 2020, the Company entered into two new term loan facilities: a $500 million one-year facility and a $500 million two-year facility. The interest rate on these facilities is based on LIBOR plus a fixed margin which varies with the Company's credit ratings. The facilities require the Company to maintain coverage ratios and leverage ratios consistent with the revolving credit facility discussed above. The facilities include a provision for determining a LIBOR successor rate in the event LIBOR reference rates are no longer available, which is expected to occur by the end of 2021.These facilities are expected to expire on or around the time that LIBOR is expected to be replaced by a successor rate. During the third quarter of 2020, the Company repaid the $500 million of borrowings on its one-year facility. The Company had $500 million of borrowings outstanding under its two-year facility and no borrowings outstanding under its one-year facility at September 30, 2020.

In April 2020, the Company entered into a new 364 day $1 billion unsecured revolving credit facility with a term out option after one year. The facility has similar coverage and leverage ratios as the facility discussed above. As of the date of this report the Company had no borrowings under this facility.

Senior Notes

In May 2020, the Company issued $750 million of 2.250% Senior Notes due 2030. The Company used the net proceeds to reduce outstanding short term borrowings.

In March 2020, the Company repaid $500 million of maturing senior notes.

In September 2019, the Company repaid $300 million of maturing senior notes.

In connection with the closing of the JLT Transaction, the Company assumed approximately $1 billion of historical JLT indebtedness. In April and June of 2019, the Company repaid approximately $450 million and $553 million, respectively, representing all of JLT's debt it acquired upon the closing of the JLT Transaction. The Company incurred debt extinguishment costs of $32 million due to the debt repayments.

In March 2019, the Company issued €550 million of 1.349% Senior Notes due 2026 and €550 million of 1.979% Senior Notes due 2030. In addition, the Company issued an additional $250 million of 4.375% Senior Notes due 2029, in March 2019. These notes constitute a further issuance of the 4.375% Senior Notes due 2029, of which $1.25 billion aggregate principal amount was issued in January 2019 (see below). After giving effect to the issuance of the notes, the Company has $1.5 billion aggregate principal amount of 4.375% Senior Notes due 2029. The Company used part of the net proceeds from these offerings, along with the $5 billion of Senior Notes issued in January 2019 (discussed above) primarily to fund the acquisition of JLT, including the payment of related fees and expenses, and to repay certain JLT indebtedness, as well as for general corporate purposes.

In January 2019, the Company issued $700 million of 3.50% Senior Notes due 2020, $1 billion of 3.875% Senior Notes due 2024, $1.25 billion of 4.375% Senior Notes due 2029, $500 million of 4.75% Senior Notes due 2039, $1.25 billion of 4.90% Senior Notes due 2049 and $300 million of Floating Rate Senior Notes due 2021. The floating rate notes are based on LIBOR plus a fixed margin. These notes are due prior to the date that LIBOR is expected to be replaced by a successor rate, which is expected to occur in 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, 2020				December 31, 2019
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Short-term debt	$	1,216	$	1,234	$	1,215	$	1,229
Long-term debt	$	11,532	$	13,480	$	10,741	$	11,953

The fair value of the Company’s short-term debt consists primarily of borrowings from the term loan and revolving credit facilities 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.

32

15.    Restructuring Costs

JLT Related Integration and Restructuring

The Company is currently integrating JLT, which involves combining the business practices and co-locating colleagues in most geographies, rationalizing real estate leases around the world, realizing of synergies and migrating legacy JLT systems onto the Company's information technology environment and security protocols. The Company is also incurring cost for consulting fees related to integration management processes and legal fees related to rationalizing legal entity structures to reduce costs, mitigate risks and improve operational transparency.

Costs will be recognized based on applicable accounting guidance which includes accounting for disposal or exit activities, guidance related to impairment of long lived assets (for right of use assets related to real estate leases), as well as other costs resulting from accelerated depreciation or amortization of leasehold improvements and other property and equipment. Based on its current estimates, the Company expects to incur costs of approximately $700 million in connection with the integration and restructuring of the combined businesses, primarily related to severance, real estate rationalization, information technology rationalization, consulting fees related to the management of the integration processes and legal fees related to the rationalization of legal entity structures. The Company incurred $335 million of costs in 2019 and $181 million in the first nine months of 2020 and expects the remaining costs to be incurred during the fourth quarter of 2020 and in 2021. These integration and restructuring plans may change during implementation, which may change our current cost and related savings estimates, as the Company continues to refine its detailed plans for each business and location.

In connection with the JLT integration and restructuring, in the first nine months of 2020 the Company incurred costs of $181 million: $125 million in RIS, $31 million in Consulting, and $25 million in Corporate. The severance and related costs were included in compensation and benefits and the other costs were included in other operating expenses in the consolidated statement of income.

After further evaluation of our sublease assumptions, the Company recorded a ROU asset impairment charge of $9 million for the nine month period ended September 30, 2020 to reflect the current market environment.

Details of the JLT integration and restructuring activity from January 1, 2019 through September 30, 2020, is as follows:    

(In millions)	Severance		Real Estate Related Costs (a)		Information Technology (a)		Consulting and Other Outside Services (b)		Total
Liability at 1/1/19	$	—	$	—	$	—	$	—	$	—
2019 Charges	154		38		45		98		335
Cash payments	(112)		(14)		(45)		(94)		(265)
Non-cash charges	—		(19)		—		(4)		(23)
Liability at 12/31/19	$	42	$	5	$	—	$	—	$	47
2020 Charges	38		42		45		56		181
Cash payments	(70)		(15)		(40)		(44)		(169)
Non-cash charges	—		(26)		(5)		—		(31)
Liability at 9/30/2020	$	10	$	6	$	—	$	12	$	28

(a) Includes data center contract termination costs and temporary infrastructure leasing costs.

(b) Includes consulting fees related to the management of the integration processes and legal fees related to the rationalization of legal entity structures.

Other Restructuring

During 2018 and 2019, Marsh initiated programs to simplify its organization structure and realign and rebrand certain of its businesses. The Company incurred severance and consulting costs of $2 million for the nine month period ended September 30, 2020, related to these initiatives.

During the fourth quarter of 2018, Mercer initiated a program to restructure its business to further optimize the way Mercer operates, setting up the Company for a more fluid and nimble structure and operating model for the future. The Company incurred restructuring severance and consulting costs of $17 million for the nine month period ended September 30, 2020 related to this initiative.

33

In addition to the charges discussed above, the Company incurred costs of $24 million at Corporate in 2020 that reflects cost to modernize the Company's information technology systems and security protocols, consulting costs related to the restructure of the Global HR function and adjustments to restructuring liabilities for future rent under non-cancellable leases.

After further evaluation of our sublease assumptions, the Company recorded a ROU asset impairment charge of $3 million for the nine month period ended September 30, 2020 to reflect the current market environment.

The following details other restructuring liabilities for actions initiated prior to 2020:

(In millions)	Liability at 1/1/19		Amounts Accrued		Cash Paid		Other		Liability at 12/31/19		Amounts Accrued		Cash Paid		Other		Liability at 9/30/2020
Severance	$	73	$	73	$	(91)	$	(4)	$	51	$	15	$	(51)	$	—	$	15
Future rent under non-cancelable leases and other costs	39		39		(21)		(6)		51		28		(34)		(2)		$	43
Total	$	112	$	112	$	(112)	$	(10)	$	102	$	43	$	(85)	$	(2)	$	58

The expenses associated with the above 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.

16.    Common Stock

There were no repurchases of the Company's common stock during the first nine months of 2020. The Company does not expect to repurchase shares for the remainder of 2020. In November 2019, the Board of Directors of the Company authorized the Company to repurchase up to $2.5 billion in shares of the Company's common stock, which superseded any prior authorizations. As of September 30, 2020, the Company remained authorized to repurchase up to approximately $2.4 billion in shares of its common stock. There is no time limit on the authorization. During the first nine months of 2019 the Company repurchased approximately 3.1 million shares of its common stock for consideration of $300 million.

The Company issued approximately 3.4 million and 4.2 million shares related to stock compensation and employee stock purchase plans during the first nine months of 2020 and 2019, respectively.

34

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. See Note 8 to the consolidated financial statements for additional information. 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.

Litigation Matters

The Company and its subsidiaries are subject to a significant number of claims, lawsuits and proceedings in the ordinary course of 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, investment advisory, and investment management services for corporate and public sector clients, 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 may 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 Group, 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.

Governmental Inquiries and Enforcement Matters

Our activities are regulated under the laws of the United States and its various states, the European Union and its member states, and the other jurisdictions in which the Company operates.

Risk and Insurance Services Segment

•In April 2017, the Financial Conduct Authority in the United Kingdom (the "FCA") commenced a civil competition investigation into the aviation insurance and reinsurance sector. In connection with that investigation, the FCA carried out an on-site inspection at the London offices of Marsh Limited, our Marsh and Guy Carpenter operating subsidiary in the United Kingdom, and JLT Specialty Ltd., JLT's U.K. operating subsidiary. The FCA indicated that it had reasonable grounds for suspecting that Marsh Limited, JLT Specialty Ltd. and other participants in the market had been sharing competitively sensitive information within the aviation insurance and reinsurance broking sector.

In October 2017, the Company received a notice that the Directorate-General for Competition of the European Commission had commenced a civil investigation of a number of insurance brokers, including both Marsh and JLT, regarding "the exchange of commercially sensitive information between competitors in relation to aviation and aerospace insurance and reinsurance broking products and services in the European Economic Area ("EEA"), as well as possible coordination between competitors." In light of the action taken by the European Commission, the FCA informed Marsh Limited and JLT Specialty Ltd. that it had discontinued its investigation under U.K. competition law. In May 2018, the FCA advised that it would not be taking any further action with Marsh Limited or JLT Specialty Ltd. in connection with this matter.

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. 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. At least three

35

of these individuals, including the former JLT employee, have since pleaded guilty to criminal charges. We are cooperating with all ongoing investigations related to this matter.

At this time, we are unable to predict the likely timing, outcome or ultimate impact of the foregoing investigations or any related 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.

Consulting Segment

In 2014, the FCA conducted a thematic 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 JLT’s ETV pension transfer advice. 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 cases 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 the acquisition, JLT recorded a gross liability of approximately £59 million (or approximately $77 million) based primarily upon the results of the Skilled Person report together with the expected costs of the ETV file review. This estimate was based on a review of a limited number of the total files. As of September 30, 2020, that estimated liability increased to approximately £62 million (or approximately $79 million) to reflect the increased compliance costs of the ongoing review. As the review and redress calculations are completed for the outstanding files, the ultimate liability may increase significantly. We expect this gross liability to be partially offset by insurance recoveries from JLT’s insurers and indemnification claims.

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 were reinsured up to £40 million by a related party of River Thames. Payment of claims under the reinsurance agreement is collateralized by segregated assets held in a trust. As of September 30, 2020, the reinsurance coverage exceeded the best estimate of the projected liability of the policies covered by the guarantee. 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.

36

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 Oliver Wyman Group.

The accounting policies of the segments are the same as those used for the consolidated financial statements described in Note 1 to the Company’s 2019 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.

Prior to being acquired by the Company, JLT operated in three segments: Specialty, Reinsurance and Employee Benefits. JLT operated in 41 countries, with significant revenue in the United Kingdom, Pacific, Asia and the United States. As of April 1, 2019, the historical JLT businesses were combined into MMC operations as follows: JLT Specialty is included by geography within Marsh, JLT Reinsurance is included in Guy Carpenter and the majority of JLT's Employee Benefits business was included in Mercer Health and Wealth.

Selected information about the Company’s operating segments for the three and nine-month periods ended September 30, 2020 and 2019 are as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(In millions)	Revenue			Operating Income (Loss)		Revenue			Operating Income (Loss)
2020–
Risk and Insurance Services	$	2,291	(a)	$	333	$	7,805	(c)	$	1,883
Consulting	1,696		(b)	278		5,074		(d)	815
Total Operating Segments	3,987			611		12,879			2,698
Corporate/Eliminations	(19)			(71)		(71)			(203)
Total Consolidated	$	3,968		$	540	$	12,808		$	2,495
2019–
Risk and Insurance Services	$	2,206	(a)	$	218	$	7,203	(c)	$	1,468
Consulting	1,785		(b)	317		5,258		(d)	874
Total Operating Segments	3,991			535		12,461			2,342
Corporate/Eliminations	(23)			(68)		(73)			(257)
Total Consolidated	$	3,968		$	467	$	12,388		$	2,085

(a) Includes inter-segment revenue of $3 million in 2019, interest income on fiduciary funds of $8 million and $31 million in 2020 and 2019, respectively, and equity method loss of $6 million in 2020 and equity method income of $10 million in 2019.

(b) Includes inter-segment revenue of $19 million and $20 million in 2020 and 2019, respectively, interest income on fiduciary funds of less than $1 million in both 2020 and 2019.

(c) Includes inter-segment revenue of $5 million and $7 million in 2020 and 2019, respectively, interest income on fiduciary funds of $40 million and $80 million in 2020 and 2019, respectively, and equity method income of $7 million and $16 million in 2020 and 2019, respectively.

(d) Includes inter-segment revenue of $66 million in both 2020 and 2019, interest income on fiduciary funds of $1 million and $2 million in 2020 and 2019, respectively, and equity method income of $4 million and $10 million in 2020 and 2019, respectively.

37

Details of operating segment revenue for the three and nine-month periods ended September 30, 2020 and 2019 are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Risk and Insurance Services
Marsh	$	2,015	$	1,923	$	6,259	$	5,850
Guy Carpenter	276		283		1,546		1,353
Total Risk and Insurance Services	2,291		2,206		7,805		7,203
Consulting
Mercer	1,216		1,280		3,616		3,695
Oliver Wyman Group	480		505		1,458		1,563
Total Consulting	1,696		1,785		5,074		5,258
Total Operating Segments	3,987		3,991		12,879		12,461
Corporate/Eliminations	(19)		(23)		(71)		(73)
Total	$	3,968	$	3,968	$	12,808	$	12,388

19.    New Accounting Guidance

New Accounting Pronouncements Adopted Effective January 1, 2020:

In August 2018, the FASB issued new guidance that amends required fair value measurement disclosures. The guidance adds new requirements, eliminates some current disclosures and modifies other required disclosures. The new disclosure requirements, along with modifications made to disclosures as a result of the change in requirements for narrative descriptions of measurement uncertainty, must be applied on a prospective basis. The effects of all other amendments included in the guidance must be applied retrospectively for all periods presented. The adoption of this guidance impacted disclosures only and did not have an impact on the Company's financial position or results of operations.

In January 2017, the FASB issued new guidance to simplify the test for goodwill impairment. The new guidance eliminates the second step in the current two-step goodwill impairment process, under which a goodwill impairment loss is measured by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill for that reporting unit. The new guidance requires a one-step impairment test, in which the goodwill impairment charge is based on the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The guidance should be applied on a prospective basis with the nature of and reason for the change in accounting principle disclosed upon transition. The adoption of this standard did not have an impact on the Company's financial position or results of operations.

In June 2016, the FASB issued new guidance on the impairment of financial instruments. The new guidance adds a CECL impairment model that is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of lifetime expected credit losses, which the FASB believes will result in more timely recognition of such losses. The new standard is also intended to reduce the complexity of U.S. GAAP by decreasing the number of credit impairment models that entities use to account for debt instruments. Further, the new standard makes targeted changes to the impairment model for available-for-sale debt securities. The adoption of this standard did not have a material impact on the Company's financial position or results of operations.

New Accounting Pronouncements Effective January 1, 2019:

The following new accounting standard was adopted using a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of January 1, 2019:

Leases

In February 2016, the FASB issued new guidance intended to improve financial reporting for leases. Under the new guidance, a lessee is required to recognize assets and liabilities for leases. Consistent with legacy GAAP, the recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee will depend on the classification of the lease as financing or operating. However, unlike legacy GAAP, which requires that only capital leases are recognized on the balance sheet, the new guidance requires that both operating and

38

financing leases be recognized on the balance sheet. The Company adopted this new standard effective January 1, 2019, using a modified retrospective method, applying the new guidance as of the beginning of the year of adoption, with a cumulative effect of initially applying the guidance recognized as an adjustment to retained earnings at January 1, 2019. Therefore, prior period information has not been restated. The Company has elected the package of practical expedients, which among other things, allows historical lease classifications to be carried forward. The Company did not elect the hindsight practical expedient in determining lease term and impairment of an entity's ROU assets. On January 1, 2019, the Company recognized a lease liability of $1.9 billion and ROU asset of $1.7 billion, related to real estate operating leases. The ROU asset also reflected reclassification adjustments primarily from other liabilities related to existing deferred rent, unamortized lease incentives and restructuring liabilities of $0.2 billion upon adoption. There was no cumulative-effect adjustment required to be booked to retained earnings upon transition. The adoption of this standard did not have a material impact on our income statement as compared to prior periods.

The following new accounting standards were adopted prospectively as of January 1, 2019:

Derivatives and Hedging

In August 2017, the FASB issued new guidance intended to refine and expand hedge accounting for both financial and commodity risks. The guidance creates more transparency around how economic results are presented in both the financial statements and the footnotes, as well as making targeted improvements to simplify the application of hedge accounting guidance. The Company adopted this guidance effective January 1, 2019. The adoption of this standard did not have an impact on the Company's financial position or results of operations.

Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

In February 2018, the FASB issued new guidance that allowed an entity to reclassify the stranded tax effects resulting from the Tax Cuts and Job Act (the "TCJA") from accumulated other comprehensive income ("AOCI") to retained earnings. The guidance is effective for the period beginning January 1, 2019. The Company elected not to reclassify the stranded income tax effects of the TCJA from AOCI to retained earnings. The adoption of this standard had no impact on the Company's financial position or results of operations. The Company’s accounting policy related to releasing income tax effects from AOCI follows the portfolio approach.

New Accounting Pronouncements Not Yet Adopted

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 contract 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. Early adoption is permitted. The adoption of this standard is not expected to 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 Company is currently evaluating the impact this standard will have on its financial position and results of operations.

In August 2018, the FASB issued new guidance that amends disclosures related to Defined Benefit Plans. The guidance removes disclosures that no longer are considered cost-beneficial, clarifies the specific requirements of certain disclosures, and adds disclosure requirements identified as relevant. The guidance must be applied on a retrospective basis. The guidance is effective for fiscal years ending after December 15, 2020. Early adoption is permitted. Adoption of this guidance will impact disclosures only and will not have an impact on the Company's financial position or results of operations.

39

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 and solutions in risk, strategy and people. Its businesses include: Marsh, the insurance broker, intermediary and risk advisor; Guy Carpenter, the risk and reinsurance specialist; Mercer, the provider of HR and Investment related financial advice and services; and Oliver Wyman, the management, economic and brand consultancy. With 76,000 colleagues worldwide and annual revenue of $17 billion, the Company provides analysis, advice and transactional capabilities to clients in more than 130 countries.

The Company operates 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 wealth, health 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.

A reconciliation of segment operating income to total operating income is included in Note 18 to the consolidated financial statements included in Part I Item 1 in this report. The accounting policies used for each segment are the same as those used for the consolidated financial statements.

For information on the third quarter and nine month periods ended September 30, 2019 results and similar comparisons, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" of our Form 10-Q for the quarterly and year-to-date periods ended September 30, 2019.

Business Update Related To COVID-19

The Coronavirus (COVID-19) pandemic has impacted essentially every geography in which the Company operates. Governments implemented various restrictions around the world, including closure of non-essential businesses, travel, shelter-in-place requirements for citizens and other restrictions.

Through the end of the third quarter, the vast majority of the Company’s colleagues have continued working in a remote work environment, with virtually minimal disruption to the Company as a whole and its ability to serve clients. The safety and well-being of our colleagues continues to be our first priority.

As many countries have begun to re-open their economies, there are various conditions imposed by each jurisdiction, and new restrictions may be imposed based on local circumstances. The Company has re-opened offices in various locations around the world, while ensuring that it continues to adhere to guidelines and orders issued by national, state and local governments. The timing of office re-openings will vary based on the conditions and restrictions in each location, but it remains uncertain the extent to which colleagues will return to offices for the remainder of the year and into 2021. However, the Company expects it will continue its ability to service clients effectively while colleagues remain in a remote work environment.

The ultimate extent of the COVID-19 impact to the Company will depend on numerous evolving factors and future developments that it is not able 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-Q for the quarter ended March 31, 2020.

40

Acquisition of JLT

On April 1, 2019, the Company completed its acquisition (the "Transaction") of all of the outstanding shares of Jardine Lloyd Thompson Group plc ("JLT"), a public company organized under the laws of England and Wales. Under the terms of the Transaction, JLT shareholders received £19.15 in cash for each JLT share, which values JLT’s existing issued and to be issued share capital at approximately £4.3 billion (or approximately $5.6 billion based on an exchange rate of U.S. $1.31:£1).

JLT's results of operations for the period January 1, 2019 through March 31, 2019 are not included in the Company’s results of operation for 2019. 

By virtue 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. Please see the "Risk Factors" section of our most recently filed Annual Report on Form 10-K for risks associated with the acquisition.

The Company’s results for the three and nine month periods ended September 30, 2020 were impacted by JLT related acquisition, restructuring and integration costs as well as legacy MMC restructuring programs as discussed in Note 15 to the consolidated financial statements.

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

This Management's Discussion & Analysis ("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.

Consolidated Results of Operations

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions, except per share figures)	2020		2019		2020		2019
Revenue	$	3,968	$	3,968	$	12,808	$	12,388
Expense:
Compensation and Benefits	2,495		2,437		7,479		7,256
Other Operating Expenses	933		1,064		2,834		3,047
Operating Expenses	3,428		3,501		10,313		10,303
Operating Income	540		467		2,495		2,085
Income Before Income Taxes	459		414		2,253		1,908
Net Income Before Non-Controlling Interests	320		306		1,667		1,377
Net Income Attributable to the Company	$	316	$	303	$	1,642	$	1,351
Net Income Per Share Attributable to the Company:
Basic	$	0.62	$	0.60	$	3.25	$	2.67
Diluted	$	0.62	$	0.59	$	3.21	$	2.64
Average Number of Shares Outstanding:
Basic	507		506		506		506
Diluted	512		511		511		511
Shares Outstanding at September 30,	507		505		507		505

41

The Company’s results of operations and earnings per share for the three and nine month periods ended September 30, 2020 and 2019 include costs related to JLT integration and restructuring activities, and other MMC restructuring activities as discussed in more detail in Note 15 of the consolidated financial statements. These costs are reflected as part of net operating income. In addition, in 2019 the Company incurred other costs related to the financing of the JLT Transaction and hedging certain economic exposures. These costs are summarized below:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Restructuring costs, excluding JLT	$	23	$	12	$	43	$	56
JLT integration and restructuring costs	44		77		181		192
JLT acquisition related costs	15		21		41		133
Impact on operating income	82		110		265		381
Change in fair value of acquisition related derivative contracts	—		—		—		8
Early extinguishment of JLT debt	—		—		—		32
JLT related interest income - pre-acquisition	—		—		—		(25)
JLT related interest expense - pre-acquisition	—		—		—		53
Impact on income before taxes	$	82	$	110	$	265	$	449

Operating income in the third quarter of 2020 increased 15% to $540 million. The increase reflects a decrease in expense of 2%, while revenue was flat as compared to the same period last year. The decrease in expense reflects a decrease in JLT integration and restructuring and acquisition-related costs and savings realized from the completion of integration efforts to date. The decrease also reflects lower travel and entertainment, meeting costs and outside services resulting from the Company’s restrictions on travel and cost containment measures taken in light of COVID-19 partly offset by higher base salaries and incentive compensation.

Income before income taxes increased to $459 million in the third quarter of 2020, compared with $414 million in the third quarter of 2019. The increase reflects higher operating income discussed immediately above, partially offset by lower investment income.

Diluted earnings per share increased from $0.59 in the third quarter of 2019 to $0.62 in 2020. This increase is a result of the factors discussed above offset by a higher effective tax rate in the third quarter of 2020 compared to 2019.

Operating income for the nine months ended September 30, 2020 increased 20%, to $2.5 billion as compared to $2.1 billion in 2019. This increase is a result of the factors discussed above.

Income before income taxes for the nine months ended September 30, 2020 increased to $2.3 billion compared with $1.9 billion in the prior year. The increase in operating income noted above was partially offset by lower investment income and interest income.

Diluted earnings per share increased to $3.21 for the nine month period ended September 30, 2020 from $2.64 in the prior year, primarily due to the factors discussed above as well as a lower effective tax rate.

JLT Integration and Restructuring Costs

The Company is currently integrating JLT, which is discussed in more detail in Note 15 to the consolidated financial statements, and will incur costs in connection with the integration and restructuring of the combined businesses, primarily related to severance, real estate rationalization, technology, consulting fees related to the management of the integration processes and legal fees related to the rationalization of legal entity structures. Based on current estimates, the Company expects to incur pre-tax charges of $700 million, of which approximately $625 million will be cash charges. The Company incurred $335 million in 2019 and $181 million in the first nine months of 2020 and expects the remaining costs to be incurred during the fourth quarter of 2020 and in 2021. The Company realized cost savings of approximately $339 million through September 30, 2020, and expects to exceed $350 million of run rate saving. The Company incurred cash charges of approximately $265 million during 2019 and $169 million in 2020, and expects most of the remaining cash expenditures to occur during the fourth quarter of 2020 and in 2021. Given the current environment, these integration and restructuring plans continue to evolve, which when finalized, may change our current cost and related savings estimates, as the Company continues to refine its detailed plans for each business and location.

42

JLT Acquisition Related Costs

JLT acquisition related costs include costs directly related to completing the Transaction, such as retention costs, investment banking fees, legal fees and stamp duty tax. It also includes the loss on disposal of JLT's aerospace business in the second quarter of 2019.

Consolidated Revenue and Expense

Revenue - Components of Change

The Company conducts business in more than 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 calculation of underlying revenue growth for the nine-month period ended September 30, 2020, is calculated as if MMC and JLT were a combined company as of January 1, 2019, but excludes the impact of currency and other acquisitions, dispositions, and transfers among businesses. Combined prior year revenue information for MMC and JLT for the nine-month period ended September 30, 2019 is presented below. The unaudited 2019 JLT revenue amounts in "2019 including JLT" reflect historical JLT revenue information following IFRS, adjusted to conform with U.S. GAAP and MMC’s specific accounting policies, primarily related to development of constraints and subsequent release of those constraints related to the reinsurance business. The decrease in revenue related to the JLT aerospace business, which was sold in June 2019, is reflected in the acquisitions/dispositions column. All other acquisitions/dispositions activity is included in the acquisitions/dispositions column. Underlying expense growth is calculated in a similar manner.

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)	2020		2019
Risk and Insurance Services
Marsh	$	2,009	$	1,902	6	%	—		3	%	3	%
Guy Carpenter	274		273		—		—		1	%	—
Subtotal	2,283		2,175		5	%	—		2	%	3	%
Fiduciary Interest Income	8		31
Total Risk and Insurance Services	2,291		2,206		4	%	—		2	%	2	%
Consulting
Mercer	1,216		1,280		(5)	%	1	%	(2)	%	(3)	%
Oliver Wyman Group	480		505		(5)	%	1	%	—		(6)	%
Total Consulting	1,696		1,785		(5)	%	1	%	(2)	%	(4)	%
Corporate/Eliminations	(19)		(23)
Total Revenue	$	3,968	$	3,968	—		—		1	%	(1)	%

43

	Three Months Ended September 30,				% Change GAAP Revenue		Components of Revenue Change*
							Currency Impact		Acquisitions/ Dispositions/ Other Impact		Underlying Revenue
(In millions)	2020		2019
Marsh:
EMEA	$	536	$	536	—		1	%	(1)	%	—
Asia Pacific	254		242		5	%	1	%	1	%	4	%
Latin America	93		110		(15)	%	(12)	%	(5)	%	2	%
Total International	883		888		—		(1)	%	(1)	%	2	%
U.S./Canada	1,126		1,014		11	%	—		6	%	5	%
Total Marsh	$	2,009	$	1,902	6	%	—		3	%	3	%
Mercer:
Wealth	566		592		(4)	%	2	%	(3)	%	(3)	%
Health	430		441		(3)	%	—		(3)	%	—
Career	220		247		(11)	%	—		—		(11)	%
Total Mercer	$	1,216	$	1,280	(5)	%	1	%	(2)	%	(3)	%

	Nine Months Ended September 30,				% Change GAAP Revenue		2019 Including JLT		% Change Including JLT in 2019		Components of Revenue Change Including JLT*
											Currency Impact		Acquisitions/ Dispositions/ Other Impact		Underlying Revenue
(In millions)	2020		2019
Risk and Insurance Services
Marsh	$	6,231	$	5,795	8	%	$	6,027	3	%	(1)	%	2	%	3	%
Guy Carpenter	1,534		1,328		15	%	1,446		6	%	—		—		6	%
Subtotal	7,765		7,123		9	%	7,473		4	%	(1)	%	1	%	4	%
Fiduciary Interest Income	40		80				85
Total Risk and Insurance Services	7,805		7,203		8	%	7,558		3	%	(1)	%	1	%	3	%
Consulting
Mercer	3,616		3,695		(2)	%	3,769		(4)	%	(1)	%	(2)	%	(1)	%
Oliver Wyman	1,458		1,563		(7)	%	1,563		(7)	%	—		—		(6)	%
Total Consulting	5,074		5,258		(4)	%	5,332		(5)	%	(1)	%	(2)	%	(2)	%
Corporate/Eliminations	(71)		(73)				(73)
Total Revenue	$	12,808	$	12,388	3	%	$	12,817	—		(1)	%	—		1	%

44

	Nine Months Ended September 30,				% Change GAAP Revenue		2019 Including JLT		% Change Including JLT in 2019		Components of Revenue Change Including JLT*
											Currency Impact		Acquisitions/ Dispositions/ Other Impact		Underlying Revenue
(In millions)	2020		2019
Marsh:
EMEA	$	1,887	$	1,821	4	%	$	1,928	(2)	%	(1)	%	(1)	%	1	%
Asia Pacific	790		698		13	%	764		3	%	(1)	%	—		4	%
Latin America	283		304		(7)	%	326		(13)	%	(12)	%	(4)	%	3	%
Total International	2,960		2,823		5	%	3,018		(2)	%	(2)	%	(1)	%	2	%
U.S./Canada	3,271		2,972		10	%	3,009		9	%	—		5	%	4	%
Total Marsh	$	6,231	$	5,795	8	%	$	6,027	3	%	(1)	%	2	%	3	%
Mercer:
Wealth	1,719		1,748		(2)	%	1,803		(5)	%	(1)	%	(3)	%	(1)	%
Health	1,348		1,341		1	%	1,360		(1)	%	(1)	%	(3)	%	3	%
Career	549		606		(9)	%	606		(9)	%	(1)	%	—		(9)	%
Total Mercer	$	3,616	$	3,695	(2)	%	$	3,769	(4)	%	(1)	%	(2)	%	(1)	%

Underlying revenue measures the change in revenue using consistent currency exchange rates, excluding the impact of certain items that affect comparability such as: acquisitions, dispositions, transfers among businesses, and changes in estimate methodology.
*	Components of revenue change may not add due to rounding.

Revenue

Consolidated revenue for the third quarter of 2020 was $4.0 billion, the same as last year. This reflects a decrease of 1% on an underlying basis offset by an increase of 1% from acquisitions.

Revenue in the Risk and Insurance Services segment for the third quarter of 2020 was $2.3 billion, an increase of 4% from the same quarter of the prior year. This reflects increases of 2% on an underlying basis and 2% from acquisitions. Consulting revenue of $1.7 billion in the third quarter of 2020 decreased 5%, reflecting decreases of 4% on an underlying basis and 2% from the disposition of businesses, partly offset by an increase of 1% from the impact of foreign currency translation.

For the first nine months of 2020, consolidated revenue increased 3%. This reflects increases of 1% on an underlying basis and a decrease of 1% from the impact of foreign currency translation. Risk and Insurance Services revenue increased 8% from the same period in 2019. This reflects increases of 3% on an underlying basis and 1% from acquisitions partly offset by a decrease of 1% from the impact of foreign currency translation when compared with 2019.

Consulting revenue decreased 4% compared with the nine month period last year. Revenue decreased 2% on an underlying basis and 2% from dispositions of businesses.

Operating Expense

The Company incurred approximately $59 million and $98 million of operating expenses for the three month periods ended September 30, 2020 and September 30, 2019, respectively, related to JLT acquisition, integration and restructuring charges as previously discussed.

Consolidated operating expense in the third quarter decreased 2% compared with the same period last year. Expense decreased 4% on an underlying basis offset by an increase of 1% from the impact of foreign currency translation and an increase of 1% from acquisitions. The underlying expense decrease reflects lower travel and entertainment, meeting costs and outside services resulting from the Company’s restrictions on travel and cost containment measures taken in light of COVID-19 offset by an increase in base salaries and incentive compensation. The Company also incurred lower acquisition, integration and restructuring charges related to the JLT Transaction and savings realized from the completion of integration efforts to date.

The Company incurred approximately $222 million and $325 million of operating expenses for the nine month periods ended September 30, 2020 and September 30, 2019, respectively, related to JLT acquisition, integration and restructuring charges as discussed above.

45

Consolidated operating expenses for the first nine months of 2020 was essentially flat as compared to the same period in 2019, reflecting decreases of 3% on an underlying basis and 1% from the impact of foreign currency translation offset by a 1% increase from acquisitions when compared with 2019. The decrease in underlying expenses is primarily due to the items discussed above.

Risk and Insurance Services

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

For the Three and Nine Months Ended September 30,	Three Months						Nine Months
(In millions)	2020			2019			2020			2019
Revenue	$	2,291		$	2,206		$	7,805		$	7,203
Compensation and Benefits	1,400			1,373			4,234			4,012
Other Operating Expenses	558			615			1,688			1,723
Expense	1,958			1,988			5,922			5,735
Operating Income	$	333		$	218		$	1,883		$	1,468
Operating Income Margin	14.5		%	9.9		%	24.1		%	20.4		%

Revenue

Revenue in the Risk and Insurance Services segment in the third quarter of 2020 was $2.3 billion, an increase of 4% as compared to the same period last year. This reflects increases of 2% in underlying revenue and 2% from acquisitions.

At Marsh, revenue in the third quarter of 2020 was $2.0 billion, an increase of 6% when compared to the same period last year. This reflects increases in underlying revenue of 3% and a 3% increase from acquisitions. In U.S./Canada, underlying revenue increased 5%. Revenue in International operations increased 2% on an underlying basis, with increases of 4% in Asia Pacific and 2% in Latin America. EMEA was flat as compared to prior year. Guy Carpenter's third quarter revenue was slightly higher than last year. Interest earned on fiduciary funds decreased $23 million compared to the third quarter of 2019.

Revenue in the Risk and Insurance Services segment increased 8% for the first nine months of 2020 compared with 2019. This reflects increases of 3% on an underlying basis and 1% from acquisitions, partly offset by a 1% decrease from the impact of foreign currency. In Marsh, underlying revenue increased 4% in U.S./Canada. The International division increased 2% on an underlying basis, reflecting increases of 4% in Asia Pacific, 3% in Latin America and 1% in EMEA. Guy Carpenter's revenue in the first nine months of 2020 increased 15%, reflecting a 6% increase on an underlying basis.

Expense

Expenses in the Risk and Insurance Services segment decreased 1% in the third quarter of 2020 compared with the same period last year. This reflects decreases of 5% in underlying expense, partly offset by an increase of 3% from acquisitions. The decrease in underlying expense reflects lower JLT acquisition, restructuring and integration related costs of $34 million and savings realized from the completion of integration efforts to date. The decrease also reflects lower travel and entertainment and meeting costs resulting from the Company’s restrictions on travel and cost containment measures taken in light of COVID-19.

Expenses for the first nine months of 2020 increased 3% compared to the prior year. This reflects decreases of 3% in underlying expenses and 1% from the impact of foreign currency translation, partly offset by an increase of 2% from acquisitions. The underlying expense decrease is primarily due to the items discussed in the previous paragraph.

46

Consulting

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

For the Three and Nine Months Ended September 30,	Three Months						Nine Months
(In millions)	2020			2019			2020			2019
Revenue	$	1,696		$	1,785		$	5,074		$	5,258
Compensation and Benefits	980			967			2,911			2,932
Other Operating Expenses	438			501			1,348			1,452
Expense	1,418			1,468			4,259			4,384
Operating Income	$	278		$	317		$	815		$	874
Operating Income Margin	16.4		%	17.7		%	16.1		%	16.6		%

Revenue

Consulting revenue in the third quarter of 2020 was $1.7 billion, a decrease of 5% compared to the same period last year. This reflects decreases of 4% in underlying revenue and 2% from the disposition of businesses, partly offset by an increase of 1% from the impact of foreign currency translation.

Mercer's revenue of approximately $1.2 billion in the third quarter of 2020 decreased 5% compared to the same period last year. This reflects decreases of 3% on an underlying basis and 2% from dispositions of businesses. On an underlying basis, revenue in Health was flat, while Wealth decreased 3% and Career decreased 11% as compared to prior year. Oliver Wyman's revenue decreased 5% to $480 million, reflecting a decrease of 6% on an underlying basis offset by a 1% increase from the impact of foreign currency translation.

For the nine months ended September 30, 2020, revenue decreased 4% in the Consulting segment as compared to the same period last year. Underlying revenue decreased 2%, reflecting decreases of 1% at Mercer and 6% at Oliver Wyman.

Expense

Consulting expenses in the third quarter of 2020 decreased 4% as compared to the third quarter of 2019. This reflects decreases of 4% on an underlying basis and 1% from dispositions offset by an increase of 1% from the impact of foreign currency translation. The decrease in underlying expense reflects lower travel and entertainment, meeting costs and outside services resulting from the Company’s restrictions on travel and cost containment measures taken in light of COVID-19 and lower recoverable expenses, offset by higher incentive compensation expense.

Consulting expenses in the first nine months of 2020 decreased 3% as compared to the same period of 2019, reflecting a decrease of 2% on an underlying basis. The decrease in underlying expense reflects lower travel and entertainment, meeting costs and outside services resulting from the Company’s restrictions on travel and cost containment measures taken in light of COVID-19 and lower recoverable expense.

Corporate and Other

Corporate expenses were $71 million in the third quarter of 2020, compared with $68 million in the same period of 2019 and $203 million and $257 million for the nine month periods ended September 30, 2020 and 2019, respectively. The decrease for the nine month period is primarily due to lower acquisition, integration and restructuring costs primarily related to the JLT Transaction and savings realized from the completion of integration efforts to date.

Interest

Interest income earned on corporate funds was $1 million for the three month periods ending September 30, 2020 compared to $4 million for the same period in 2019. Interest income for the nine months ended September 30, 2020 was $5 million compared to $34 million for the same period of 2019. During the first quarter of 2019, the Company issued approximately $6.5 billion of senior notes related to the JLT acquisition. The funds were held in escrow and released for payment in April when the acquisition was completed. The decrease in interest income from the prior year is due to interest earned on these funds in 2019.

47

Interest expense decreased $5 million in the third quarter of 2020 compared with the third quarter of 2019 due to a lower level of commercial paper borrowings and the impact of lower interest rates on variable rate borrowings. Interest expense decreased $7 million for the nine months of 2020 compared to 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/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 net investment losses of $14 million and $47 million for the three and nine-month periods ended September 30, 2020, compared to net investment income of $7 million and $20 million for the three and nine-month periods ended September 30, 2019. The net investment loss reported in the third quarter of 2020 is primarily due to the mark-to-market change related to the Company's investment in AF. The net investment loss for the nine-months ended September 30, 2020 also includes a loss of $23 million from the sale of shares of AF during the second quarter of 2020, as well as losses related to its private equity fund investments. The three and nine-month periods ended September 30, 2019 include gains of $4 million and $10 million are related to mark-to-market changes in equity securities and gains of $3 million and $10 million related to investments in private equity funds and other investments.

Income and Other Taxes

As noted above, on April 1, 2019, the Company completed the JLT Transaction. The integration of this global organization required intercompany transfers of acquired entities into the Company's country structures and combination of those entities within the equivalent Company businesses. The integration transactions were designed to be tax efficient. The Company's global effective tax rate on JLT's earnings was reduced compared to JLT's pre-acquisition tax rate by utilizing debt for the restructuring transactions to be capital efficient, and reducing the generation of post-acquisition tax losses by merging historically unprofitable JLT entities with profitable Company operations. The provisions for deferred taxes and uncertain tax positions were established as part of the purchase price allocation as of April 1, 2019.

The broader JLT organization is now held under the Company, which makes it part of a U.S.-based multinational company and subjects it to full U.S. taxation. The integration of the JLT entities into the Company's entities, where applicable, should be substantially complete by the end of 2020.

The Company's effective tax rate in the third quarter of 2020 was 30.3% compared with 26.0% in the third quarter of 2019. The effective tax rates for the first nine months of 2020 and 2019 were 26.0% and 27.8%.The rate in the third quarter and the first nine months of 2020 reflects costs of re-measuring the Company’s UK deferred tax liability for legislation that cancelled a scheduled 2% reduction in the U.K. corporate income tax rate, partially offset by tax benefits related to a new international funding structure implemented to facilitate global staffing and contracting.The rate in the first nine months of 2019 reflects discrete adjustments related to the JLT acquisition, including tax on the disposition of JLT’s aerospace business and nondeductible expenses incurred in connection with the JLT Transaction. The tax rates in all periods reflect the impact of discrete tax matters such as excess tax benefits related to share-based compensation, changes in tax legislation, changes in uncertain tax positions, deferred tax adjustments and non-taxable adjustments to contingent acquisition consideration.

The effective tax rate may vary significantly from period to period for the foreseeable future. The effective tax rate is sensitive to the geographic mix and repatriation of the Company's earnings, which may result in higher or lower 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, 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 limitation.

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, Marsh & McLennan Companies, Inc. is the issuer of essentially all of the Company's external indebtedness, and incurs the related interest expense in the U.S. The Company’s interest

48

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 United States. 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. For post-2017 years, including 2020, the Company continues to evaluate its global investment and repatriation strategy in light of its capital requirements, considering the impact of the quasi-territorial tax regime for future foreign earnings.

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 $22 million within the next twelve months due to settlement of audits and expiration of statutes of limitation.

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, payroll taxes due from March 27, 2020 through December 31, 2020 will be deferred until 2021 and 2022 (50% to be paid each year) without interest or penalties.

The Company’s accounting policy related to releasing income tax effects from AOCI follows the portfolio approach.

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 below in financing cash flows.

The Company derives a significant portion of its revenue and operating profit from operating subsidiaries located outside of the United States. Funds from those operating subsidiaries are regularly repatriated to the United States out of annual earnings. At September 30, 2020, the Company had approximately $736 million of cash and cash equivalents in its foreign operations, which includes $231 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. With respect to repatriating 2018 and prior earnings, the Company has evaluated such factors as its short- and long-term capital needs, acquisition and borrowing strategies, and the availability of cash for repatriation for each of its subsidiaries. The Company has determined that, in general, its permanent reinvestment assertions, in light of the enactment of the Tax Cuts and Jobs Act, should allow the Company to repatriate previously taxed earnings from the deemed repatriations as cash becomes available.

During the first nine months of 2020, the Company recorded foreign currency translation adjustments which decreased net equity by $196 million. Strengthening of the U.S. dollar against foreign currencies would reduce 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 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 generated $2.0 billion of cash from operations for the nine month period ended September 30, 2020 compared to $1.3 billion generated by operations in the first nine months of 2019. These amounts reflect the net income of the Company during those periods, excluding gains or losses from investments, adjusted for non-cash

49

charges and changes in working capital which relate primarily to the timing of payments of accrued liabilities and pension plan contributions or receipts of assets. The Company paid $169 million related to the JLT integration and restructuring activity for the nine months ended September 30, 2020.

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 2020, the Company contributed $56 million to its non-U.S. defined benefit pension plans and $25 million to its U.S. defined benefit pension plans. In the first nine months of 2019, the Company contributed $58 million to its non-U.S. defined benefit pension plans and $27 million to its U.S. defined benefit pension plans.

In the United States, contributions to the tax-qualified defined benefit plans are based on ERISA guidelines.

Outside the United States, the Company has a large number of 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, 2019. 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. 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 than under U.S. GAAP and may result in contributions irrespective of the U.S. GAAP funded status. For the MMC U.K. Pension Fund, a new agreement was reached with the trustee in the fourth quarter of 2019 based on the surplus funding position at December 31, 2018. Under the agreement no deficit funding is required until 2023. The funding level will be re-assessed during 2022 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 GBP 450 million over a seven-year period. In addition, in the U.K. the Company assumed responsibility for the JLT U.K. plan. Deficit funding of approximately $28 million is expected during 2020 with a new funding agreement expected to be reached with the Trustee in early 2021.

The Company expects to fund an additional $25 million to its non-U.S. defined benefit plans over the remainder of 2020, comprising approximately $16 million to plans outside of the U.K. and $9 million to the U.K. plans. The Company expects to fund an additional $38 million to its U.S. defined benefit plans during the remainder of 2020.

As part of the JLT Transaction, the Company has assumed responsibility for a number of pension plans throughout the world, with $255 million of net pension liabilities as of December 31, 2019 (approximately $1 billion of plan liabilities and $748 million of plan assets as of December 31, 2019), the most significant of which is the JLT U.K. plan. The JLT U.K. plan has a defined benefit section which was frozen to future accrual in 2006 and a defined contribution section. The assets of the scheme are held in a trustee administered fund separate from the Company.

Financing Cash Flows

Net cash used for financing activities was $163 million for the nine-month period ended September 30, 2020, compared with $4.3 billion of net cash provided by such activities for the same period in 2019.

Credit Facilities

The Company and certain of its foreign subsidiaries have a multi-currency five-year unsecured revolving credit facility of $1.8 billion. The interest rate on this facility is based on LIBOR plus a fixed margin which varies with the Company's credit ratings. This facility expires in October 2023 and requires the Company to maintain certain coverage and leverage ratios which are tested quarterly. The Company borrowed $1 billion under this facility in the first quarter of 2020, which was repaid in full during the second quarter of 2020. There were no borrowings outstanding under this facility at September 30, 2020.

In January 2020, the Company entered into two new term loan facilities: a $500 million one-year facility and a $500 million two-year facility. The interest rate on these facilities is based on LIBOR plus a fixed margin which varies with the Company's credit ratings. The facilities require the Company to maintain coverage ratios and leverage ratios consistent with the revolving credit facility discussed above. The facilities include a provision for determining a LIBOR successor rate in the event LIBOR reference rates are no longer available, which is expected to occur by the end of 2021.These facilities are expected to expire on or around the time that LIBOR is expected to be replaced by a successor rate. In the first quarter of 2020 the Company borrowed $1 billion against these facilities. During the third quarter of 2020, the Company repaid $500 million of borrowings from its one-year facility. The Company had

50

$500 million of borrowings outstanding under its two-year facility and no borrowings outstanding under its one-year facility at September 30, 2020.

In April 2020, the Company entered into a new 364 day $1 billion unsecured revolving credit facility with a term out option after one year. The facility has similar coverage and leverage ratios as the facility discussed above. The Company had no borrowings outstanding under this facility at September 30, 2020.

Debt

The Company has established a short-term debt financing program of up to $1.5 billion through the issuance of commercial paper. The proceeds from the issuance of commercial paper are used for general corporate purposes. The Company had no commercial paper outstanding at September 30, 2020.

In May 2020, the Company issued $750 million of 2.250% Senior Notes due 2030. The Company used the net proceeds from this offering to pay outstanding borrowings under the revolving credit facility discussed above.

In March 2020, the Company repaid $500 million of maturing Senior Notes.

In September 2019, the Company repaid $300 million of maturing Senior Notes.

In March 2019, the Company issued €550 million of 1.349% Senior Notes due 2026 and €550 million of 1.979% Senior Notes due 2030. In addition, the Company issued an additional $250 million of 4.375% Senior Notes due 2029, in March 2019. These notes constitute a further issuance of the 4.375% Senior Notes due 2029, of which $1.25 billion aggregate principal amount was issued in January 2019 (see below). After giving effect to the issuance of the notes, the Company has $1.5 billion aggregate principal amount of 4.375% Senior Notes due 2029. The Company used part of the net proceeds from these offerings, along with the $5 billion of Senior Notes issued in January 2019 (discussed above) to primarily fund the acquisition of JLT, including the payment of related fees and expenses, and to repay certain JLT indebtedness, as well as for general corporate purposes.

In January 2019, the Company issued $5 billion aggregate amount of Senior Notes consisting of $700 million of 3.50% Senior Notes due 2020, $1 billion of 3.875% Senior Notes due 2024, $1.25 billion of 4.375% Senior Notes due 2029, $500 million of 4.75% Senior Notes due 2039, $1.25 billion of 4.90% Senior Notes due 2049 and $300 million of Floating Rate Senior Notes due 2021.

In connection with the closing of the JLT Transaction, the Company assumed approximately $1 billion of historical JLT indebtedness. In April and June of 2019, the Company repaid approximately $450 million and $553 million, respectively, representing all of JLT's debt it acquired upon the acquisition of JLT. The Company incurred debt extinguishment costs of $32 million in regard to the repayment of this debt.

The Company's senior debt is currently rated A- by Standard & Poor's and Baa1 by Moody's. The Company's short-term debt is currently rated P-2 by Moody's and A-2 by Standard & Poor's. The Company carries a negative outlook from Moody's and Standard & Poor's.

Share Repurchases

There were no repurchases of the Company's common stock during the nine month period ending September 30, 2020. The Company does not expect to repurchase shares for the remainder of 2020. In November 2019, the Board of Directors authorized an increase in the Company’s share repurchase program, which supersedes any prior authorization, allowing management to buy back up to $2.5 billion of the Company’s common stock. As of September 30, 2020, the Company remained authorized to purchase shares of its common stock up to a value of approximately $2.4 billion. There is no time limit on this authorization. During the first nine months of 2019 the Company repurchased approximately 3.1 million shares of its common stock for consideration of $300 million.

Contingent Payments Related to Acquisitions

During the first nine months of 2020, the Company paid $101 million of contingent payments related to acquisitions made in prior periods. These payments are split between financing and operating cash flows in the consolidated statements of cash flows. Payments of $65 million related to the contingent consideration liability that was recorded on the date of acquisition are reflected as financing cash flows. Payments related to increases in the contingent consideration liability subsequent to the date of acquisition of $36 million are reflected as operating cash flows. Remaining estimated future contingent consideration payments of $230 million for acquisitions completed in the first nine months of 2020 and in prior years are recorded in accounts payable and accrued liabilities or other liabilities in the consolidated balance sheet at September 30, 2020.

The Company paid deferred purchase consideration related to prior years' acquisitions of $60 million in the first nine months of 2020. Remaining deferred cash payments of approximately $235 million for acquisitions completed in the first nine months of 2020 and in prior years are recorded in accounts payable and accrued liabilities or other liabilities in the consolidated balance sheet at September 30, 2020.

51

In the first nine months of 2019, the Company paid $58 million of contingent payments related to acquisitions made in prior periods. Of this amount, $23 million was reported as financing cash flows and $35 million as operating cash flows.

Dividends

The Company paid dividends on its common shares of $702 million ($1.375 per share) during the first nine months of 2020, as compared with $655 million ($1.285 per share) during the first nine months of 2019.

Derivatives

Foreign Exchange Forward Contract

In connection with the JLT Transaction, to hedge the risk of appreciation of the GBP-denominated purchase price relative to the U.S. dollar, on September 20, 2018, the Company entered into the FX Contract to, solely upon consummation of the Transaction, purchase £5.2 billion and sell a corresponding amount of U.S. dollars at a contracted exchange rate. The FX Contract, which did not qualify for hedge accounting treatment under applicable accounting guidance, is discussed in Note 11 to the consolidated financial statements. The Company recorded a gain of $31 million related to the FX contract for the nine month period ended September 30, 2019. The Company settled the FX Contract on April 1, 2019.

Foreign Exchange Contract on Euro Debt Issuance

In March 2019, the Company issued €1.1 billion of senior notes related to the JLT Transaction. See Note 14 for additional information related to the Euro senior note issuances. In connection with the senior note issuances of €1.1 billion, the Company entered into a forward exchange contract to hedge the economic risk of changes in foreign exchange rates from the issuance date to settlement date of the Euro senior notes. Upon settlement of this contract, the Company recorded a charge of $7 million in the consolidated statement of income for the nine month period ended September 30, 2019.

Treasury Locks on Senior Notes

In connection with the JLT Transaction, to hedge the risk of increases in future interest rates prior to its issuance of senior notes, in the fourth quarter of 2018, the Company entered into treasury locks related to $2 billion of the expected debt. The fair value at December 31, 2018 was based on the published treasury rate plus forward premium as of December 31, 2018 compared to the all in rate at the inception of the contract. The contracts were not designated as an accounting hedge. The Company recorded an unrealized loss of $116 million related to the change in the fair value of these derivatives in the consolidated statement of income for the twelve month period ended December 31, 2018. In January 2019, upon issuance of the $5 billion of senior notes, the Company settled the treasury lock derivatives and made a payment to its counter party for $122 million. Upon settlement, an additional charge of $6 million was recorded in the consolidated statement of income in the first quarter of 2019.

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 to fund the JLT acquisition, the Company issued €1.1 billion senior notes, as discussed above, 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 Company concludes that the hedge is highly effective, the change in the debt balance related to foreign exchange fluctuations will be recorded in foreign currency translation gains (losses) in the consolidated balance sheet. The U.S. dollar value of the Euro notes increased by $60 million during the first nine months of 2020 related to the change in foreign exchange rates. Since the Company concluded that the hedge was highly effective, it recorded a decrease to foreign currency translation gains (losses) for the nine months ended September 30, 2020.

Investing Cash Flows

Net cash used for investing activities amounted to $646 million in the first nine months of 2020, compared with $5.5 billion used during the same period in 2019.

As previously noted, the JLT Transaction closed on April 1, 2019. Funds for the purchase of outstanding shares were distributed on April 11, 2019.

The Company paid $559 million and $5.5 billion, net of cash acquired, for acquisitions it made during the first nine months of 2020 and 2019, respectively.

52

During the first nine months of 2020, the Company sold certain businesses primarily in the U.S., U.K. and Canada for cash proceeds of approximately $93 million.

At December 31, 2019, the Company owned approximately 443 million shares of the common stock of Alexander Forbes ("AF"), a South African company listed on the Johannesburg Stock Exchange, which was accounted for under the equity method of accounting. In February 2020, the Company sold approximately 49 million shares, and in May 2020, sold an additional 193 million shares to third parties, leaving the Company with an investment of approximately 201 million shares of the common stock of AF at September 30, 2020. Upon completion of the May transaction, the investment in AF is accounted at fair value, with investment gains and losses recorded as investment income in the consolidated statement of income.

During the first quarter of 2019, the Company disposed of its investment in Benefitfocus for total proceeds of approximately $132 million. The Company received $115 million in the first quarter of 2019 and $17 million in the second quarter of 2019 as final settlement on the sale.

During the second quarter of 2019, the Company disposed of its investment in Payscale and received proceeds of approximately $47 million.

In January 2019, Marsh increased its equity ownership in Marsh India from 26% to 49% for approximately $88 million. Marsh India is carried under the equity method.

The Company used cash of $278 million to purchase fixed assets and capitalized software in the first nine months of 2020, compared with $284 million in the first nine months of 2019, primarily related to computer equipment and software purchases, software development costs and the refurbishing and modernizing of office facilities.

The Company has commitments for potential future investments of approximately $51 million in four private equity funds that invest primarily in financial services companies.

Commitments and Obligations

The Company’s contractual obligations of the types identified in the table below were of the following amounts as of September 30, 2020:

(In millions)	Payment due by Period
Contractual Obligations	Total		Within 1 Year		1-3 Years		4-5 Years		After 5 Years
Term loan facility	500		—		500		—		—
Short-term debt	1,216		1,216		—		—		—
Long-term debt	11,106		—		1,184		2,385		7,537
Interest on long-term debt	5,498		473		822		688		3,515
Net operating leases	2,547		405		700		528		914
Service agreements	212		83		76		53		—
Other long-term obligations	517		180		309		27		1
Total	$	21,596	$	2,357	$	3,591	$	3,681	$	11,967

The above does not include unrecognized tax benefits of $102 million, accounted for under ASC Topic No. 740, as the Company is unable to reasonably predict the timing of settlement of these liabilities, other than approximately $10 million that may become payable within one year.

The above does not include the provisional estimate of remaining transitional tax payments related to the Tax Cuts and Job Act ("the TCJA") of $65 million.

Management’s Discussion of Critical Accounting Policies

The Company’s discussion of critical accounting policies 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 2019 Form 10-K.

New Accounting Guidance

Note 19 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.

53

Reconciliation of Non-GAAP Measures

On April 1, 2019, the Company completed its previously announced acquisition of JLT. JLT's results of operations for the three and nine month periods ended September 30, 2020 are included in the Company’s results of operations. JLT's results of operations for the three months ending March 31, 2019 are not included in the Company's results of operations for the nine month period ended September 30, 2019. Prior to being acquired by the Company, JLT operated in three segments, Specialty, Reinsurance and Employee Benefits. As of April 1, 2019, the historical JLT businesses were combined into MMC operations as follows: JLT Specialty is included by geography within Marsh, JLT Reinsurance is included within Guy Carpenter and the majority of the JLT Employee Benefits business is included in Mercer Health and Wealth.

The JLT Transaction had a significant impact on the Company’s results of operations in 2020. The Company believes that in addition to the change in reported GAAP revenue, a comparison of 2020 GAAP reported revenue to the combined 2019 revenue of MMC and JLT, as if the companies were combined on January 1, 2019, provides investors with meaningful information as to the Company’s year-over-year underlying operating results. Investors should not consider the comparison of these non-GAAP measures in isolation from, or as a substitute for, the financial information that the Company reports in accordance with GAAP.

The "2019 Including JLT" revenue information set forth in the table below presents revenue information as if the companies were combined on January 1, 2019 and is not necessarily indicative of what the results would have been had we operated the business since January 1, 2019.

The MMC revenue amounts are as previously reported by the Company in its quarterly filings on Form 10-Q for the applicable periods. JLT 2019 revenue information is derived using the same policies and adjustments as the "JLT Supplemental Information - Revenue Analysis" furnished to the SEC on June 6, 2019 on Form 8-K, which is not incorporated by reference in this Form 10-Q, and includes the revenue from JLT’s aerospace business.

54

(In millions)	Nine Months Ended September 30, 2019
MMC As Previously Reported
Risk & Insurance Services
Marsh	$	5,795
Guy Carpenter	1,328
Subtotal	7,123
Fiduciary Interest Income	80
Total Risk & Insurance Services	7,203
Consulting
Mercer	3,695
Oliver Wyman Group	1,563
Total Consulting	5,258
Corporate Eliminations	(73)
Total Revenue	$	12,388
JLT 2019
Specialty (Marsh)	$	232
Reinsurance (Guy Carpenter)	118
Employee Benefits (Mercer)	74
Subtotal	424
Fiduciary Interest Income	5
Total Revenue	$	429
2019 Including JLT
Marsh	$	6,027
Guy Carpenter	1,446
Subtotal	7,473
Fiduciary Interest Income	85
Total Risk & Insurance Services	7,558
Consulting
Mercer	3,769
Oliver Wyman Group	1,563
Total Consulting	5,332
Corporate Eliminations	(73)
Total Revenue Including JLT	$	12,817

55

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.

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

(In millions)	September 30, 2020
Cash and cash equivalents invested in money market funds, certificates of deposit and time deposits	$	2,388
Fiduciary cash and investments	$	8,765

Based on the above balances, if short-term interest rates increased or decreased by 10%, or 3 basis points, for the remainder of the year, annual interest income, including interest earned on fiduciary funds, would increase or decrease by approximately $1 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 2020 are discussed in Note 8 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-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 fund 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 and fiduciary fund investments and will further restrict the portfolio as appropriate to market conditions. The majority of cash and fiduciary fund investments 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 54% 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 expenses are in the functional currency of the foreign location. As such, under normal circumstances, the U.S. dollar translation of both the revenues and expenses, as well as the potentially offsetting movements of various currencies against the U.S. dollar, generally tends 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, such as the impact of "Brexit" in the United Kingdom, 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 $41 million. The Company has exposure to approximately 80 foreign currencies overall. If exchange rates at September 30, 2020 hold constant for the rest of 2020, the Company estimates the year-over-year impact from conversion of foreign currency earnings will decrease full year net operating income by approximately $7 million.

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

56

Equity Price Risk

The Company holds investments in both public and private companies as well as private equity funds, including investments of approximately $58 million that are valued using readily determinable fair values and approximately $43 million of investments without readily determinable fair values. The Company also has investments of approximately $265 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.

At September 30, 2020, the Company owns approximately 201 million shares or approximately 16% of the common stock of Alexander Forbes ("AF"), a South African company listed on the Johannesburg Stock Exchange, at a closing share price of 3.50 South African Rand per share. The investment in AF is accounted at fair value, with investment gains and losses recorded as investment income in the consolidated statement of income.

Other

A number of lawsuits and regulatory proceedings are pending. See Note 17 ("Claims, Lawsuits and Other Contingencies") to the consolidated financial statements 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. The Company will continue monitoring and assessing any impacts from COVID-19 on our internal controls.

57

PART II. OTHER INFORMATION

Item 1.     Legal Proceedings.

We and our 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 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, 2019 and in "Part II, Item 1A. Risk Factors" in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2020. 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.

58

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

Issuer Repurchases of Equity Securities

The Company did not repurchase any shares of its common stock during the third quarter of 2020. In November 2019, the Board of Directors of the Company authorized the Company to repurchase up to $2.5 billion in shares of the Company's common stock, which superseded any prior authorizations. As of September 30, 2020, the Company remained authorized to repurchase up to approximately $2.4 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, 2020	—	$	—	—	$	2,422,987,756
August 1-31, 2020	—	$	—	—	$	2,422,987,756
September 1-30, 2020	—	$	—	—	$	2,422,987,756
Total	—			—	$	2,422,987,756

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.

59

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 30, 2020	/s/ Mark C. McGivney
		Mark C. McGivney
		Chief Financial Officer
Date:	October 30, 2020	/s/ Stacy M. Mills
		Stacy M. Mills
		Vice President & Controller
		(Chief Accounting Officer)

60

EXHIBIT INDEX

Exhibit No.	Exhibit Name
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

61

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 30, 2020	/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 30, 2020	/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, 2020 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 30, 2020	/s/ Daniel S. Glaser
		Daniel S. Glaser
		President and Chief Executive Officer

Date:	October 30, 2020	/s/ Mark C. McGivney
		Mark C. McGivney
		Chief Financial Officer

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 23, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
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		507,190,569
Entity Central Index Key	0000062709
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenue	$ 3,968	$ 3,968	$ 12,808	$ 12,388
Expense:
Compensation and benefits	2,495	2,437	7,479	7,256
Other operating expenses	933	1,064	2,834	3,047
Operating expenses	3,428	3,501	10,313	10,303
Operating income	540	467	2,495	2,085
Other net benefit credits	60	69	187	203
Interest income	1	4	5	34
Interest expense	(128)	(133)	(387)	(394)
Cost of extinguishment of debt	0	0	0	(32)
Investment (loss) income	(14)	7	(47)	20
Acquisition related derivative contracts	0	0	0	(8)
Income before income taxes	459	414	2,253	1,908
Income tax expense	139	108	586	531
Net income before non-controlling interests	320	306	1,667	1,377
Less: Net income attributable to non-controlling interests	4	3	25	26
Net income attributable to the Company	$ 316	$ 303	$ 1,642	$ 1,351
Net income per share attributable to the Company:
Basic net income per share attributable to the Company (usd per share)	$ 0.62	$ 0.60	$ 3.25	$ 2.67
Diluted net income per share attributable to the Company (usd per share)	$ 0.62	$ 0.59	$ 3.21	$ 2.64
Average number of shares outstanding:
Average number of shares outstanding - Basic (in shares)	507	506	506	506
Average number of shares outstanding - Diluted (in shares)	512	511	511	511
Shares outstanding (in shares)	507	505	507	505

XML

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income before non-controlling interests	$ 320	$ 306	$ 1,667	$ 1,377
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	500	(475)	(200)	(366)
(Loss) gain related to pension/post-retirement plans	(73)	82	136	102
Other comprehensive income (loss), before tax	427	(393)	(64)	(264)
Income tax (benefit) expense on other comprehensive income	(7)	11	29	20
Other comprehensive income (loss), net of tax	434	(404)	(93)	(284)
Comprehensive income (loss)	754	(98)	1,574	1,093
Less: comprehensive income attributable to non-controlling interest	4	3	25	26
Comprehensive income (loss) attributable to the Company	$ 750	$ (101)	$ 1,549	$ 1,067

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 2,388	$ 1,155
Receivables
Commissions and fees	4,658	4,608
Advanced premiums and claims	121	123
Other	604	645
Gross receivables	5,383	5,376
Less-allowance for credit losses	(147)	(140)
Net receivables	5,236	5,236
Other current assets	688	677
Total current assets	8,312	7,068
Goodwill	15,034	14,671
Other intangible assets	2,711	2,774
Fixed assets (net of accumulated depreciation and amortization of $2,113 at September 30, 2020 and $2,001 at December 31, 2019)	864	858
Pension related assets	1,825	1,632
Right of use assets	1,884	1,921
Deferred tax assets	623	676
Other assets	1,428	1,757
Total assets	32,681	31,357
Current liabilities:
Short-term debt	1,216	1,215
Accounts payable and accrued liabilities	2,662	2,746
Accrued compensation and employee benefits	1,762	2,197
Current lease liabilities	335	342
Accrued income taxes	318	179
Dividends payable	237	0
Total current liabilities	6,530	6,679
Fiduciary liabilities	8,765	7,344
Less – cash and investments held in a fiduciary capacity	(8,765)	(7,344)
Net fiduciary assets	0	0
Long-term debt	11,532	10,741
Pension, post-retirement and post-employment benefits	2,163	2,336
Long-term lease liabilities	1,902	1,926
Liabilities for errors and omissions	352	335
Other liabilities	1,450	1,397
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, 2020 and December 31, 2019	561	561
Additional paid-in capital	882	862
Retained earnings	15,902	15,199
Accumulated other comprehensive loss	(5,148)	(5,055)
Non-controlling interests	161	150
Stockholders' equity before treasury stock	12,358	11,717
Less – treasury shares, at cost, 53,626,539 shares at September 30, 2020 and 57,013,097 shares at December 31, 2019	(3,606)	(3,774)
Total equity	8,752	7,943
Total liabilities and stockholders' equity	$ 32,681	$ 31,357

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Fixed assets, accumulated depreciation and amortization	$ 2,113	$ 2,001
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	53,626,539	57,013,097

XML

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Operating cash flows:
Net income before non-controlling interests	$ 320	$ 306	$ 1,667		$ 1,377
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization of fixed assets and capitalized software			282		245
Amortization of intangible assets			265		235
Non cash lease expense			241		236
Adjustments and payments related to contingent consideration liability			(14)		(9)
Charge for early extinguishment of debt	0	0	0		32
Provision for deferred income taxes			6		95
Loss (gain) on investments	14	(7)	47		(20)
Net loss on disposition of assets			9		36
Share-based compensation expense			219		184
Change in fair value of acquisition-related derivative contracts			0		8
Changes in assets and liabilities:
Net receivables			77		(84)
Other current assets			(14)		30
Other assets			69		(59)
Accounts payable and accrued liabilities			(144)		(126)
Accrued compensation and employee benefits			(431)		(281)
Accrued income taxes			150		120
Contributions to pension and other benefit plans in excess of current year credit			(240)		(269)
Other liabilities			74		(149)
Operating lease liabilities			(254)		(240)
Effect of exchange rate changes			(10)		(70)
Net cash provided by operations			1,999		1,291
Financing cash flows:
Purchase of treasury shares			0		(300)
Net increase in commercial paper			0		325
Net borrowings from term-loan and credit facilities			1,000		300
Proceeds from issuance of debt			737		6,459
Repayments of debt			(1,011)		(760)
Payments for early extinguishment of debt			0		(585)
Purchase of non-controlling interests			(3)		(75)
Acquisition-related derivative payments			0		(337)
Shares withheld for taxes on vested units – treasury shares			(131)		(89)
Issuance of common stock from treasury shares			98		132
Payments of deferred and contingent consideration for acquisitions			(125)		(60)
Distributions of non-controlling interests			(26)		(18)
Dividends paid			(702)		(655)
Net cash (used for) provided by financing activities			(163)		4,337
Investing cash flows:
Capital expenditures			(278)		(284)
Net sales of long-term investments			102		193
Purchase of equity investment			0	$ (75)	(91)
Proceeds from sales of fixed assets			3		4
Dispositions			93		225
Acquisitions			(559)		(5,500)
Other, net			(7)		(51)
Net cash used for investing activities			(646)		(5,504)
Effect of exchange rate changes on cash and cash equivalents			43		23
Increase in cash and cash equivalents			1,233		147
Cash and cash equivalents at beginning of period			1,155		1,066
Cash and cash equivalents at end of period	$ 2,388	$ 1,213	$ 2,388	$ 1,155	$ 1,213

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, 2018		$ 561	$ 817	$ 14,347	$ (4,647)	$ (3,567)	$ 73
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			23
Issuance of shares under stock compensation plans and employee stock purchase plans			(44)			250
Other			0
Net income attributable to the Company	$ 1,377			1,351			26
Dividend equivalents declared				(6)
Dividends declared				(881)
Other comprehensive income (loss), net of tax	(284)				(284)
Purchase of treasury shares						(300)
Net non-controlling interests acquired / (disposed)							95
Distributions and other changes							(17)
Balance, end of period at Sep. 30, 2019	$ 7,797	561	796	14,811	(4,931)	(3,617)	177
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 1.740
Balance, beginning of period at Jun. 30, 2019		561	736	14,741	(4,527)	(3,446)	272
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			65
Issuance of shares under stock compensation plans and employee stock purchase plans			(5)			29
Other			0
Net income attributable to the Company	$ 306			303			3
Dividend equivalents declared				(2)
Dividends declared				(231)
Other comprehensive income (loss), net of tax	(404)				(404)
Purchase of treasury shares						(200)
Net non-controlling interests acquired / (disposed)							(100)
Distributions and other changes							2
Balance, end of period at Sep. 30, 2019	$ 7,797	561	796	14,811	(4,931)	(3,617)	177
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.455
Balance, beginning of period at Dec. 31, 2019	$ 7,943	561	862	15,199	(5,055)	(3,774)	150
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			6
Issuance of shares under stock compensation plans and employee stock purchase plans			15			168
Other			(1)
Net income attributable to the Company	1,667			1,642			25
Dividend equivalents declared				(9)
Dividends declared				(930)
Other comprehensive income (loss), net of tax	(93)				(93)
Purchase of treasury shares						0
Net non-controlling interests acquired / (disposed)							(1)
Distributions and other changes							(13)
Balance, end of period at Sep. 30, 2020	$ 8,752	561	882	15,902	(5,148)	(3,606)	161
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 1.840
Balance, beginning of period at Jun. 30, 2020		561	814	16,060	(5,582)	(3,627)	166
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			69
Issuance of shares under stock compensation plans and employee stock purchase plans			(1)			21
Other			0
Net income attributable to the Company	$ 320			316			4
Dividend equivalents declared				(3)
Dividends declared				(471)
Other comprehensive income (loss), net of tax	434				434
Purchase of treasury shares						0
Net non-controlling interests acquired / (disposed)							0
Distributions and other changes							(9)
Balance, end of period at Sep. 30, 2020	$ 8,752	$ 561	$ 882	$ 15,902	$ (5,148)	$ (3,606)	$ 161
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.93

XML

Nature of Operations

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Nature of Operations

Nature of Operations

Marsh & McLennan Companies, Inc. and its consolidated subsidiaries (the "Company") is a global professional services firm offering clients advice and solutions in risk, strategy and people. Its businesses include: Marsh, the insurance broker, intermediary and risk advisor; Guy Carpenter, the risk and reinsurance specialist; Mercer, the provider of HR and Investment related financial advice and services; and Oliver Wyman Group, the management, economic and brand consultancy. With 76,000 colleagues worldwide and annual revenue of $17 billion, the Company provides analysis, advice and transactional capabilities to clients in more than 130 countries.

Business Update Related To COVID-19

The Coronavirus (COVID-19) pandemic has impacted essentially every geography in which the Company operates. Governments implemented various restrictions around the world, including closure of non-essential businesses, travel, shelter-in-place requirements for citizens and other restrictions.

Through the end of the third quarter, the vast majority of the Company’s colleagues have continued working in a remote work environment, with minimal disruption to the Company as a whole and its ability to serve clients. The safety and well-being of our colleagues continues to be our first priority.

As many countries have begun to re-open their economies, there are various conditions imposed by each jurisdiction, and new restrictions may be imposed based on local circumstances. The Company has re-opened offices in various locations around the world, while ensuring that it continues to adhere to guidelines and orders issued by national, state and local governments. The timing of office re-openings will vary based on the conditions and restrictions in each location, but it remains uncertain the extent to which colleagues will return to offices for the remainder of the year and into 2021. However, the Company expects it will continue its ability to service clients effectively while colleagues remain in a remote work environment.

The ultimate extent of the COVID-19 impact to the Company will depend on numerous evolving factors and future developments that it is not able 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-Q for the quarter ended March 31, 2020.

JLT Acquisition

On April 1, 2019, the Company completed its acquisition (the "Transaction") of all of the outstanding shares of Jardine Lloyd Thompson Group plc ("JLT"), a public company organized under the laws of England and Wales. JLT's results of operations for the three and nine month periods ended September 30, 2020 are included in the Company's results of operations. The Company's results for the nine months ended September 30, 2019 do not reflect JLT’s results of operations for the three months ended March 31, 2019 and therefore may affect comparability.

XML

Principles of Consolidation and Other Matters

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Principles of Consolidation and Other Matters

Principles of Consolidation and Other Matters

The consolidated financial statements included herein have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission. While certain information and footnote 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 for interim filings, 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, 2019 (the "2019 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 three and nine month periods ended September 30, 2020 and 2019.

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:

•the allowance for current expected credit losses on receivables,

•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,

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

•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. Management has made estimates of the impact of COVID-19 within the Company’s financial statements and there may be changes to those estimates in future periods. In most situations where estimates, fair values or recoverability of assets is dependent upon short or long term projections of cash flows, revenues or earnings before interest, taxes, depreciation and amortization ("EBITDA"), the Company has based its projections assuming the gradual lifting of global lockdowns through the rest of 2020 and into 2021. The Company has also considered potential impacts to its customer base in various industries and geographies. The ultimate extent to which the COVID-19 pandemic will directly or indirectly impact the Company’s businesses, results of operations and financial condition will depend on future developments that are highly uncertain, including new information that may emerge concerning COVID-19 and the actions taken to contain it or treat it, and the economic impact on local, regional, national and international customers and markets. 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, 2020, the Company maintained $247 million compared to $197 million at December 31, 2019 related to these regulatory requirements.

Allowance for Current Expected Credit Losses on Accounts Receivable

The Company’s policy for providing an allowance for current expected credit losses (“CECL”) on its accounts receivable is based on management’s best estimate of amounts that will be uncollectible primarily based on the Company’s historical experience of collections in its various businesses and other events that may affect the net realizable value of receivables. The charge related to expected credit losses was immaterial to the consolidated statement of income in the three and nine month periods ended September 30, 2020.

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 that are accounted for under 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 the Company's proportionate share of the change in fair value of the funds are recorded in earnings. Investments

accounted for using the equity method of accounting are included in "other assets" in the consolidated balance sheets.

The Company recorded net investment losses of $14 million and $47 million for the three and nine month periods ended September 30, 2020 compared to net investment income of $7 million and $20 million for the three and nine month periods ended September 30, 2019. The net investment loss reported in the third quarter of 2020 is primarily due to the mark-to-market change related to the Company's investment in Alexander Forbes ("AF"). The net investment loss for the nine months ended September 30, 2020 also includes a loss of $23 million from the sale of shares of AF during the second quarter of 2020, as well as losses related to its private equity fund investments. The three and nine month periods ended September 30, 2019 include gains of $4 million and $10 million related to mark-to-market changes in equity securities and gains of $3 million and $10 million related to investments in private equity funds and other investments.

Income Taxes

The Company's effective tax rate in the third quarter of 2020 was 30.3% compared with 26.0% in the third quarter of 2019. The effective tax rates for the first nine months of 2020 and 2019 were 26.0% and 27.8%. The rate in the third quarter and first nine months of 2020 reflects costs of re-measuring the Company’s U.K. deferred tax liability for legislation that cancelled a scheduled 2% reduction in the U.K. corporate income tax rate, partially offset by tax benefits related to a new international funding structure implemented to facilitate global staffing and contracting.

The rate in the first nine months of 2019 reflects discrete adjustments related to the JLT acquisition, including tax on the disposition of JLT’s aerospace business and nondeductible expenses incurred in connection with the JLT Transaction. The tax rates in both periods reflect the impact of discrete tax items such as excess tax benefits related to share-based compensation, changes in tax legislation, changes in uncertain tax positions, deferred tax adjustments and nontaxable adjustments to contingent acquisition consideration.

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 limitation.

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 increased from $86 million at December 31, 2019 to $102 million at September 30, 2020 due to net changes to tax positions of prior years and current year accruals, offset by expirations of statutes of limitation. It is reasonably possible that the total amount of unrecognized tax benefits will decrease between zero and approximately $22 million within the next twelve months due to settlements of audits and expirations of statutes of limitation.

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 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 right-of-use 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 right-of-use asset is determined based on the present value of the estimated net cash flows related to the property. Contractual costs outside of the right-of-use 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.

XML

Revenue

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue

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. To achieve that 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. Under the accounting guidance, 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.

The Company's revenue recognition guidance is provided in more detail in Note 2 of the consolidated financial statements and the notes thereto included in 2019 Form 10-K for the year ended December 31, 2019.

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

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Marsh:
EMEA	$	536	$	536	$	1,887	$	1,821
Asia Pacific	254		242		790		698
Latin America	93		110		283		304
Total International	883		888		2,960		2,823
U.S./Canada	1,126		1,014		3,271		2,972
Total Marsh	2,009		1,902		6,231		5,795
Guy Carpenter	274		273		1,534		1,328
Subtotal	2,283		2,175		7,765		7,123
Fiduciary interest income	8		31		40		80
Total Risk and Insurance Services	$	2,291	$	2,206	$	7,805	$	7,203
Mercer:
Wealth	$	566	$	592	$	1,719	$	1,748
Health	430		441		1,348		1,341
Career	220		247		549		606
Total Mercer	1,216		1,280		3,616		3,695
Oliver Wyman	480		505		1,458		1,563
Total Consulting	$	1,696	$	1,785	$	5,074	$	5,258

The Company recognizes commission revenue from arrangements for a significant portion of its brokerage arrangements at a point in time at 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 schedule provides contract assets and contract liabilities information from contracts with customers.

(In millions)	September 30, 2020		December 31, 2019
Contract Assets	$	257	$	207
Contract Liabilities	$	648	$	593

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. Contract assets are included in other current

assets in the Company's consolidated balance sheet. Contract liabilities primarily relate to the advance consideration received from customers. Contract liabilities are included in current liabilities in the Company's consolidated balance sheet. Revenue recognized in the first nine months of 2020 and 2019 that was included in the contract liability balance at the beginning of each of those years was $420 million and $378 million, respectively.

The amount of revenue recognized in the first nine months of 2020 and 2019 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 $84 million and $67 million, respectively.

The Company applies the practical expedient and therefore 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 $46 million for Marsh, $181 million for Mercer and $2 million for Oliver Wyman. The Company expects revenue in 2021, 2022, 2023, 2024 and 2025 and beyond of $123 million, $63 million, $27 million, $13 million and $3 million, respectively, related to these performance obligations.

XML

Fiduciary Assets and Liabilities

9 Months Ended

Sep. 30, 2020

Fiduciary Assets And Liabilities [Abstract]

Fiduciary Assets and Liabilities

Fiduciary Assets and Liabilities

In its capacity as an insurance broker or agent, 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. Risk and Insurance Services revenue includes interest on fiduciary funds ("fiduciary interest income") of $8 million and $40 million for the three and nine month periods ended September 30, 2020, respectively, and $31 million and $80 million for the three and nine month periods ended September 30, 2019, respectively. The decrease in 2020 compared to 2019 reflects the impact of lower interest rates partially offset by a higher level of average invested funds. The Consulting segment recorded fiduciary interest income of less than $1 million for the three months and $1 million for nine month periods ended September 30, 2020, respectively, and less than $1 million and $2 million for the three and nine month periods ended September 30, 2019, respectively. Since fiduciary assets 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 $11.4 billion at September 30, 2020 and $8.9 billion at December 31, 2019. 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.

XML

Per Share Data

9 Months Ended

Sep. 30, 2020

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 amounts)	2020		2019		2020		2019
Net income before non-controlling interests	$	320	$	306	$	1,667	$	1,377
Less: Net income attributable to non-controlling interests	4		3		25		26
Net income attributable to the Company	$	316	$	303	$	1,642	$	1,351
Basic weighted average common shares outstanding	507		506		506		506
Dilutive effect of potentially issuable common shares	5		5		5		5
Diluted weighted average common shares outstanding	512		511		511		511
Average stock price used to calculate common stock equivalents	$	114.64	$	99.97	$	107.64	$	94.75

XML

Supplemental Disclosures to the Consolidated Statements of Cash Flows

9 Months Ended

Sep. 30, 2020

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 schedule provides additional information concerning acquisitions, interest and income taxes paid for the nine-month periods ended September 30, 2020 and 2019.

(In millions)	2020		2019
Assets acquired, excluding cash	$	795	$	8,619
Liabilities assumed	(73)		(2,758)
Non-controlling interests assumed	—		(295)
Contingent/deferred purchase consideration	(163)		(66)
Net cash outflow for current year acquisitions	$	559	$	5,500

(In millions)	2020		2019
Interest paid	$	437	$	387
Income taxes paid, net of refunds	$	414	$	442

The classification of contingent consideration in the statement of cash flows is determined by whether the payment 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 a financing activity. The Company paid deferred and contingent consideration of $125 million for the nine months ended September 30, 2020. This consisted of deferred purchase consideration related to prior years' acquisitions of $60 million and contingent consideration of $65 million. For the nine months ended September 30, 2019, the Company paid deferred and contingent consideration of $60 million, consisting of deferred purchase consideration related to prior years' acquisitions of $37 million and contingent consideration of $23 million.

The following amounts are included in the operating section of the consolidated statements of cash flows. For the nine months ended September 30, 2020, the Company recorded an expense for adjustments to contingent consideration liabilities of $22 million and made contingent consideration payments of $36 million. For the nine months ended September 30, 2019, the Company recorded an expense for adjustments to contingent consideration liabilities of $26 million and made contingent consideration payments of $35 million.

The Company had non-cash issuances of common stock under its share-based payment plan of $217 million and $164 million for the nine months ended September 30, 2020 and 2019, respectively. The Company recorded stock-based compensation expense for equity awards related to restricted stock units, performance stock units and stock options of $219 million and $184 million for the nine-month periods ended September 30, 2020 and 2019, respectively.

XML

Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2020

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-month periods ended September 30, 2020 and 2019, including amounts reclassified out of AOCI, are as follows:

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of July 1, 2020	$	(3,346)	$	(2,236)	$	(5,582)
Other comprehensive (loss) income before reclassifications	(94)		497		403
Amounts reclassified from accumulated other comprehensive income	31		—		31
Net current period other comprehensive (loss) income	(63)		497		434
Balance as of September 30, 2020	$	(3,409)	$	(1,739)	$	(5,148)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of July 1, 2019	$	(2,942)	$	(1,585)	$	(4,527)
Other comprehensive income (loss) before reclassifications	56		(475)		(419)
Amounts reclassified from accumulated other comprehensive income	15		—		15
Net current period other comprehensive income (loss)	71		(475)		(404)
Balance as of September 30, 2019	$	(2,871)	$	(2,060)	$	(4,931)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of December 31, 2019	$	(3,512)	$	(1,543)	$	(5,055)
Other comprehensive income (loss) before reclassifications	12		(196)		(184)
Amounts reclassified from accumulated other comprehensive income	91		—		91
Net current period other comprehensive income (loss)	103		(196)		(93)
Balance as of September 30, 2020	$	(3,409)	$	(1,739)	$	(5,148)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of December 31, 2018	$	(2,953)	$	(1,694)	$	(4,647)
Other comprehensive income (loss) before reclassifications	26		(366)		(340)
Amounts reclassified from accumulated other comprehensive income	56		—		56
Net current period other comprehensive income (loss)	82		(366)		(284)
Balance as of September 30, 2019	$	(2,871)	$	(2,060)	$	(4,931)

The components of other comprehensive income (loss) for the three and nine-month periods ended September 30, 2020 and 2019 are as follows:

Three Months Ended September 30,	2020						2019
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	500	$	3	$	497	$	(475)	$	—	$	(475)
Pension/post-retirement plans:
Amortization of (gains) losses included in net periodic pension cost:
Prior service credits (a)	—		—		—		(1)		(1)		—
Net actuarial losses (a)	40		9		31		25		6		19
Effect of remeasurement (a)	—		—		—		(8)		(2)		(6)
Effect of settlement (a)	—		—		—		2		—		2
Subtotal	40		9		31		18		3		15
Foreign currency translation adjustments	(113)		(19)		(94)		64		8		56
Pension/post-retirement plans (losses) gains	(73)		(10)		(63)		82		11		71
Other comprehensive income (loss)	$	427	$	(7)	$	434	$	(393)	$	11	$	(404)
(a) Components of net periodic pension cost are 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,	2020						2019
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	(200)	$	(4)	$	(196)	$	(366)	$	—	$	(366)
Pension/post-retirement plans:
Amortization of (gains) losses included in net periodic pension cost:
Prior service credits (a)	(1)		—		(1)		(2)		(1)		(1)
Net actuarial losses (a)	120		28		92		77		18		59
Effect of remeasurement (a)	—		—		—		(9)		(2)		(7)
Effect of settlement (a)	—		—		—		6		1		5
Subtotal	119		28		91		72		16		56
Foreign currency translation adjustments	17		5		12		30		4		26
Pension/post-retirement plans gains	136		33		103		102		20		82
Other comprehensive income (loss)	$	(64)	$	29	$	(93)	$	(264)	$	20	$	(284)
(a) Components of net periodic pension cost are 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.

XML

Acquisitions and Dispositions

9 Months Ended

Sep. 30, 2020

Business Combinations [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. 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 four acquisitions during the first nine months of 2020.

•January – Marsh & McLennan Agency ("MMA") acquired Momentous Insurance Brokerage Inc., a California-based full-service risk management and employee benefits firm specializing in high net worth private client services and insurance solutions for the entertainment industry, and Ironwood Insurance Services, LLC, an Atlanta-based broker that provides commercial property/casualty insurance, employee benefits, and private client solutions to mid-size businesses and individuals across the U.S.

•April – MMA acquired Assurance Holdings, Inc., an Illinois-based full service independent brokerage agency providing business insurance, employee benefits, private client insurance, and retirement services to businesses and individuals across the U.S.

•June - MMA acquired Nico Insurance Services, Inc., a California-based agency providing employee benefits solutions to groups and individuals.

Total purchase consideration for acquisitions made during the nine months ended September 30, 2020 was $742 million, which consisted of cash paid of $579 million and deferred purchase consideration and estimated contingent consideration of $163 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. The Company also paid $60 million of deferred purchase consideration and $101 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 2020 based on the estimated fair values for the acquisitions as of their respective acquisition dates:

Acquisitions through September 30, 2020
(In millions)
Cash	579
Estimated fair value of deferred/contingent consideration	163
Total consideration	$	742
Allocation of purchase price:
Cash and cash equivalents	20
Accounts receivable, net	27
Fixed assets, net	15
Other intangible assets	280
Goodwill	462
Other assets	11
Total assets acquired	815
Current liabilities	22
Other liabilities	51
Total liabilities assumed	73
Net assets acquired	$	742

The purchase price allocation above 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.

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 chart provides information about intangible assets acquired during 2020:

Intangible assets through September 30, 2020 (In millions)	Amount		Weighted Average Amortization Period
Client relationships	$	257	13.3 years
Other	23		4.5 years
	$	280

Dispositions

During the first nine months of 2020, the Company sold certain businesses primarily in the U.S., U.K. and Canada for cash proceeds of approximately $93 million. There were no material dispositions made in the third quarter of 2020.

At December 31, 2019, the Company owned approximately 443 million shares of the common stock of Alexander Forbes ("AF"), a South African company listed on the Johannesburg Stock Exchange, which was accounted for under the equity method of accounting. In February 2020, the Company sold approximately 49 million shares of the common stock of AF, and in May 2020, sold an additional 193 million shares to third parties, leaving the Company with an investment of approximately 201 million shares of the common stock of AF at September 30, 2020. Upon completion of the May transaction, the investment in AF is accounted at fair value, with investment gains and losses recorded as investment income in the consolidated statement of income.

Prior-Year Acquisitions

On April 1, 2019, the Company completed the JLT Transaction and purchased all of the outstanding shares of JLT. Under the terms of the Transaction, JLT shareholders received £19.15 in cash for each JLT share, which valued JLT’s existing issued and to be issued share capital at approximately £4.3 billion (or approximately $5.6 billion based on an exchange rate of U.S. $1.31:£1). The Company also assumed existing JLT long-term indebtedness of approximately $1 billion. The Company implemented the Transaction by way of a scheme of arrangement under Part 26 of the United Kingdom Companies Act 2006, as amended.

The Risk and Insurance Services segment completed five other acquisitions during 2019.

•February – MMA acquired Bouchard Insurance, Inc., a Florida-based full service agency and Employee Benefits Group, Inc., a Maryland-based independent insurance agency.

•April – MMA acquired Lovitt & Touche, Inc., an Arizona-based insurance agency and The Centurion Group, LLC, a Pennsylvania-based retirement consulting, asset management and benefit plan advisory firm.

•October – MMA acquired Benefits Reports Insurance Services, Inc., a Massachusetts-based independent insurance agency.

Total purchase consideration for acquisitions made during the first nine months of 2019 was $5,925 million, which consisted of cash paid of $5,859 million and deferred purchase consideration and estimated contingent consideration of $66 million. Contingent consideration arrangements are primarily based on EBITDA or revenue targets over a period of two to four years. The fair value of the contingent consideration was based on projected revenue or EBITDA of the acquired entities. Estimated fair values of assets acquired and liabilities assumed are subject to adjustment when purchase accounting is finalized. For the first nine months of 2019, the Company also paid $37 million of deferred purchase consideration and $58 million of contingent consideration related to acquisitions made in prior years.

Subsequent to the JLT acquisition, the Company purchased the outstanding non-controlling interests of several JLT subsidiaries for net cash payments of approximately $75 million.

In January 2019, Marsh increased its equity ownership in Marsh India from 26% to 49%. Marsh India is accounted for under the equity method.

Prior year dispositions

During the third quarter of 2019, the Company completed the sale of a U.S. Specialty business at Marsh and a U.S. large market health and defined benefit business at Mercer for cash proceeds of approximately $60 million. Also, on June 1, 2019, the Company completed its disposition of JLT’s global aerospace business for cash proceeds of $165 million and contingent consideration receivable of approximately $65 million, based on the aerospace business achieving certain revenue milestones in 2020. The aerospace business was divested as part of the European Commission's approval of the JLT Transaction.

Pro-Forma Information

The following unaudited pro-forma financial data gives effect to the acquisitions made by the Company during 2020 and 2019. In accordance with accounting guidance related to pro-forma disclosures, the information presented for current year acquisitions is as if they occurred on January 1, 2019 and reflects acquisitions made in 2019 as if they occurred on January 1, 2018. The unaudited pro-forma information adjusts for the effects of amortization of acquired intangibles and additional interest expense related to the issuance of debt related to the JLT Transaction. 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 figures)	2020		2019		2020		2019
Revenue	$	3,968	$	4,016	$	12,859	$	12,979
Net income attributable to the Company	$	316	$	307	$	1,644	$	1,453
Basic net income per share attributable to the Company	$	0.62	$	0.61	$	3.25	$	2.87
Diluted net income per share attributable to the Company	$	0.62	$	0.60	$	3.22	$	2.84

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, 2020 include approximately $52 million and $115 million of revenue, respectively, and operating loss of $8 million and operating income of $3 million, respectively, for acquisitions made in 2020. The consolidated statements of income for the three and nine month periods ended September 30, 2019 included approximately $352 million and $848 million, respectively, of revenue, and operating losses of $69 million and $51 million, respectively, related to acquisitions made in 2019.

XML

Goodwill and Other Intangibles

9 Months Ended

Sep. 30, 2020

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 2019, the Company elected to do a quantitative assessment and determined that goodwill was not impaired, as the fair value of each reporting unit exceeded its carrying value by a substantial margin. In 2020, the Company elected to perform a qualitative impairment assessment. 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 estimates, 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. The Company completed its qualitative assessment in the third quarter of 2020 and concluded that a quantitative goodwill impairment test was not required in 2020 and that goodwill was not impaired.

Other intangible assets that are not deemed to have an indefinite life are amortized over their estimated lives and reviewed for impairment upon the occurrence of certain triggering events in accordance with applicable accounting literature. The Company does not have any indefinite lived intangible assets.

Changes in the carrying amount of goodwill are as follows:

September 30,
(In millions)	2020		2019
Balance as of January 1,	$	14,671	$	9,599
Goodwill acquired	462		4,962
Other adjustments(a)	(99)		(275)
Balance at September 30,	$	15,034	$	14,286

(a) Primarily reflects the impact of foreign exchange and dispositions.

The entire amount of goodwill acquired of $462 million in 2020 is related to the Risk and Insurance Services segment, of which $140 million is deductible for tax purposes. The goodwill arising from the acquisitions 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.

Goodwill allocable to the Company’s reportable segments at September 30, 2020 is as follows: Risk and Insurance Services, $11 billion and Consulting, $4 billion.

The gross cost and accumulated amortization of identified intangible assets at September 30, 2020 and December 31, 2019 are as follows:

	September 30, 2020						December 31, 2019
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client Relationships	$	3,644	$	1,095	$	2,549	$	3,494	$	897	$	2,597
Other (a)	381		219		162		380		203		177
Amortized intangibles	$	4,025	$	1,314	$	2,711	$	3,874	$	1,100	$	2,774

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

Aggregate amortization expense for the nine months ended September 30, 2020 and 2019 was $265 million and $235 million, respectively. The estimated future aggregate amortization expense is as follows:

For the Years Ending December 31,
(In millions)	Estimated Expense
2020 (excludes amortization through September 30, 2020)	$	92
2021	351
2022	323
2023	299
2024	286
Subsequent years	1,360
	$	2,711

The developments in the COVID-19 pandemic have resulted in uncertainty in the global economy and volatility in the equity markets. The Company considered whether such events would indicate that identified intangible assets and other long lived assets may not be recoverable. Based on its analysis, the Company concluded that the current events and circumstances related to the COVID-19 pandemic do not indicate that identified intangibles are not recoverable.

XML

Fair Value Measurements

9 Months Ended

Sep. 30, 2020

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 mutual funds are valued using a valuation technique that results in price per share at $1.00.

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, 2020 and December 31, 2019.

	Identical Assets (Level 1)				Observable Inputs (Level 2)				Unobservable Inputs (Level 3)				Total
(In millions)	09/30/20		12/31/19		09/30/20		12/31/19		09/30/20		12/31/19		09/30/20		12/31/19
Assets:
Financial instruments owned:
Exchange traded equity securities(a)	$	45	$	4	$	—	$	—	$	—	$	—	$	45	$	4
Mutual funds(a)	167		166		—		—		—		—		167		166
Money market mutual funds(b)	861		55		—		—		—		—		861		55
Other equity investment(a)	—		—		8		8		—		—		8		8
Contingent purchase consideration asset(c)	—		—		—		—		67		84		67		84
Total assets measured at fair value	$	1,073	$	225	$	8	$	8	$	67	$	84	$	1,148	$	317
Fiduciary Assets:
U.S. Treasury Bills	$	25	$	40	$	—	$	—	$	—	$	—	$	25	$	40
Money market funds	176		360		—		—		—		—		176		360
Total fiduciary assets measured at fair value	$	201	$	400	$	—	$	—	$	—	$	—	$	201	$	400
Liabilities:
Contingent purchase consideration liability(d)	$	—	$	—	$	—	$	—	$	230	$	225	$	230	$	225
Total liabilities measured at fair value	$	—	$	—	$	—	$	—	$	230	$	225	$	230	$	225

(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 at September 30, 2020 and other assets at December 31, 2019 in the consolidated balance sheets.

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

The Level 3 assets in the above chart reflect contingent purchase consideration from the sale of businesses during 2019. The change in the asset from December 31, 2019 is primarily due to the net impact of accretion and adjustments to the fair value of the acquisition related asset of approximately $14 million. A 5% increase or decrease in the projections used to estimate the contingent consideration would result in a corresponding increase or decrease of the asset of approximately $6 million.

During the nine-month period ended September 30, 2020, there were no assets or liabilities that were transferred between any of the levels.

The table below sets forth a summary of the changes in fair value of the Company’s Level 3 liabilities for the three and nine month periods ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Balance at beginning of period	$	233	$	196	$	225	$	508
Net Additions	—		(7)		96		33
Payments	(23)		(13)		(101)		(58)
Revaluation Impact	18		6		8		26
Change in fair value of the FX contract	—		—		—		(325)
Other (a)	2		3		2		1
Balance at September 30,	$	230	$	185	$	230	$	185

(a) Primarily reflects the impact of foreign exchange.

As set forth in the table above, based on the Company's ongoing assessment of the fair value of contingent consideration, the Company recorded a net increase in the estimated fair value of such liabilities for prior-period

acquisitions of $8 million in the nine-month period ended September 30, 2020. A 5% increase in the projections used to estimate the contingent consideration would increase the liability by approximately $9 million. A 5% decrease would decrease the liability by approximately $21 million.

Long-Term Investments

The Company holds investments in certain private equity investments, public companies and private companies that are accounted for using the equity method of accounting. The carrying value of these investments was $265 million and $434 million at September 30, 2020 and December 31, 2019, respectively.

Investments in Public and Private Companies

The Company has other investments in private insurance and consulting companies with a carrying value of $169 million and $183 million at September 30, 2020 and December 31, 2019, respectively.

The Company’s equity investments in insurance and consulting companies 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.

Private Equity Investments

The Company's investments in private equity funds were $96 million and $107 million at September 30, 2020 and December 31, 2019, 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 (loss) 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 $2 million and losses of $6 million from these investments for the three and nine month periods ended September 30, 2020, respectively, compared to net investment gains of $3 million and $10 million for the same periods in 2019.

Other Investments

At September 30, 2020 and December 31, 2019, the Company held certain equity investments with readily determinable market values of $58 million and $19 million, respectively. The Company recorded investment losses on these investments of $16 million and $19 million in the three and nine month periods ended September 30, 2020, respectively, and investment gains of $4 million and $10 million for the same periods in 2019. The Company also held investments without readily determinable market values of $43 million and $67 million at September 30, 2020 and December 31, 2019, respectively.

At December 31, 2019, the Company owned approximately 443 million shares of the common stock of AF, a South African company listed on the Johannesburg Stock Exchange, which was accounted for under the equity method of accounting. In February 2020, the Company sold approximately 49 million shares of the common stock of AF, and in May 2020, sold an additional 193 million shares to third parties, leaving the Company with an investment of approximately 201 million shares of the common stock of AF at September 30, 2020. Upon completion of the May transaction, the investment in AF is accounted at fair value, with investment gains and losses recorded as investment income (loss) in the consolidated statement of income. The fair value of AF at September 30, 2020 was $41 million.

In March 2019, the Company disposed of its investment in BenefitFocus for total proceeds of approximately $132 million. The Company received $115 million in the first quarter of 2019 and $17 million in April 2019.

During the second quarter of 2019, the Company disposed of its investment in Payscale and received approximately $47 million.

XML

Derivatives

9 Months Ended

Sep. 30, 2020

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 foreign currency translation gains (losses) in the consolidated balance sheet. The Company concluded that the hedge continues to be highly effective as of September 30, 2020. During 2020, the U.S. dollar value of the euro notes increased $60 million through September 30 due to the impact of foreign exchange rates, with a corresponding decrease to foreign currency translation gains (losses).

JLT Acquisition Related Derivatives

On September 20, 2018, the Company entered into the FX Contract to purchase £5.2 billion at a contracted exchange rate, to hedge the risk of appreciation of the GBP-denominated purchase price of JLT, which was settled on April 1, 2019, upon the closing of the JLT Transaction. The FX Contract did not qualify for hedge accounting treatment under applicable accounting guidance, which required the Company to record the change in the fair value of the FX Contract on each reporting date to the statement of income. The Company recorded a gain of $31 million for the nine month period ended September 30, 2019 related to the settlement of the FX contract.

In connection with the JLT Transaction, to hedge the economic risk of changes in future interest rates prior to its issuance of fixed rate debt, in the fourth quarter of 2018 the Company entered into treasury lock contracts related to $2 billion of senior notes issued in January 2019. The contracts were not designated as an accounting hedge. In January 2019, upon issuance of the $5 billion of senior notes, the Company settled the treasury lock derivatives and made a payment to its counter party for $122 million. A charge of $6 million was recorded in the first quarter of 2019 related to the settlement of the Treasury lock derivatives.

In March 2019, the Company issued €1.1 billion of senior notes related to the JLT Transaction. See Note 14 for additional information related to the Euro senior note issuances. In connection with the senior note issuances, the Company entered into a forward exchange contract to hedge the economic risk of changes in foreign exchange rates from the issuance date to settlement date of the Euro senior notes. The Company recorded a charge of $7.3 million in the consolidated statement of income for the period ended September 30, 2019 upon settlement of this contract.

JLT Derivatives and Hedging Activity

A significant portion of JLT's outstanding senior notes at the time of completion of the JLT Transaction were denominated in U.S. dollars. In order to hedge its exposure against the risk of fluctuations between the British pound and the U.S. dollar, JLT entered into foreign exchange contracts as well as interest rate swaps to protect against the risk of changes in interest rates, which were designated as fair value hedges. In June, 2019, the Company redeemed these U.S. dollar denominated senior notes and settled the related derivative contracts. The offsetting changes in fair value of the debt and the change in fair value of the derivative contracts were recorded in the consolidated statement of income for the nine month period ended September 30, 2019.

JLT also had a number of foreign exchange contracts to hedge the risk of foreign exchange movements between the U.S. dollar and the British pound, related to JLT’s U.S. dollar denominated revenue in the U.K. Prior to the acquisition, these derivative contracts were designated as cash flow hedges. Upon completion of the JLT Transaction, these derivative contracts were not re-designated as cash flow hedges by the Company. The contracts were settled in June 2019. The change in fair value between the acquisition date and the settlement date resulted in a charge of $26 million for the nine month period ended September 30, 2019. The charge is recorded as a change in fair value of acquisition related derivative contracts in the consolidated statement of income.

XML

Leases

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

Leases

Leases

A lease is defined as a party obtaining the right to use an asset legally owned by another party. The Company determines if an arrangement is a lease at inception. For operating leases entered into prior to January 1, 2019, the Right-of-Use ("ROU") assets and operating lease liabilities are recognized in the balance sheet based on the present value of the remaining future minimum payments over the lease term from the implementation date of the standard, January 1, 2019. The ROU asset was adjusted for unamortized lease incentives and restructuring liabilities that were reported, prior to January 1, 2019, as other liabilities in the consolidated balance sheet. For leases entered into subsequent to January 1, 2019, the operating lease ROU asset and operating lease liabilities are based on the present value of minimum payments over the lease term at commencement date of the lease.

The Company uses discount rates to determine the present value of future lease payments. The Company primarily uses its incremental borrowing rate adjusted to reflect a secured rate, based on the information available for leases, including the lease term and interest rate environment in the country in which the lease exists. The lease terms used to calculate the ROU asset and lease liability may include options to extend or terminate when it is reasonably certain that the Company will exercise that option.

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. Leases are negotiated with third-parties and, in some instances contain renewal, expansion and termination options. The Company also subleases certain office facilities to third-parties when the Company no longer utilizes the space. None of the Company’s leases restrict the payment of dividends or the incurrence of debt or additional lease obligations, or contain significant purchase options. In addition to the base rental costs, our lease agreements generally provide for rent escalations resulting from increased assessments for real estate taxes and other charges. A portion of our real estate lease portfolio contains base rents subject to annual changes in the Consumer Price Index ("CPI") as well as charges for operating expenses which are reimbursable to the landlord based on actual usage. Changes to the CPI and payments for such reimbursable operating expenses are considered variable and are recognized as variable lease costs in the period in which the obligation for those payments is incurred. Approximately 99% of the Company’s lease obligations are for the use of office space. All of the Company’s material leases are operating leases.

As a practical expedient, the Company has elected an accounting policy not to separate non-lease components from lease components and instead account as a single lease component. The Company has also elected not to recognize ROU assets and lease liabilities for leases that, at the commencement date, are for 12 months or less.

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

	Three Months ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020			2019
Lease Cost:
Operating lease cost	$	99	$	94	$	288		$	276
Short-term lease cost	1		4		3			7
Variable lease cost	28		37		92			113
Sublease income	(5)		(4)		(15)			(12)
Net lease cost	$	123	$	131	$	368		$	384
Other information:
Operating cash outflows from operating leases					$	306		$	288
Right of use assets obtained in exchange for new operating lease liabilities					$	162		$	112
Weighted-average remaining lease term – real estate					8.44 years			8.86 years
Weighted-average discount rate – real estate leases					3.02		%	3.09		%

Future minimum lease payments for the Company’s operating leases as of September 30, 2020 are as follows:

Payment Dates (In millions)	Real Estate Leases
Remainder of 2020	$	112
2021	390
2022	363
2023	315
2024	270
2025	242
Subsequent years	855
Total future lease payments	2,547
Less: Imputed interest	(310)
Total	$	2,237
Current lease liabilities	$	335
Long-term lease liabilities	1,902
Total lease liabilities	$	2,237

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

As of September 30, 2020, the Company had additional operating real estate leases that had not yet commenced of $16 million. These operating leases will commence over the next 12 months.

XML

Retirement Benefits

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Retirement Benefits

Retirement Benefits

The Company maintains qualified and non-qualified defined benefit pension plans for some of 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 in accordance with applicable law.

The target asset allocation for the Company's U.S. plans was 64% equities and equity alternatives and 36% fixed income. At September 30, 2020 the actual allocation for the Company's U.S. Plan was 63% equities and equity alternatives and 37% fixed income. The target allocation for the U.K. Plans at September 30, 2020 was 33% equities and equity alternatives and 67% fixed income. At September 30, 2020, the actual allocation for the U.K. Plans was 33% equities and equity alternatives and 67% fixed income. The Company's U.K. Plans comprised approximately 81% of non-U.S. plan assets at December 31, 2019. 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.

JLT Defined Benefit Pension Plans

As part of the JLT Transaction, the Company has assumed responsibility for a number of pension plans throughout the world, with $255 million of net pension liabilities as of December 31, 2019 (approximately $1,003 million in liabilities and $748 million of plan assets), the most significant of which is the JLT U.K. Plan. The JLT U.K. Plan has a defined benefit section which was frozen to future accrual in 2006 and a defined contribution section. The assets of the scheme are held in a trustee administered fund separate from the Company.

The components of the net periodic benefit cost for defined benefit and other post-retirement plans are as follows:

Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	10	$	10	$	—	$	—
Interest cost	112		120		1		1
Expected return on plan assets	(212)		(214)		—		—
Recognized actuarial loss (credit)	40		25		(1)		(1)
Net periodic benefit credit	$	(50)	$	(59)	$	—	$	—
Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	27	$	28	$	—	$	—
Interest cost	322		360		2		2
Expected return on plan assets	(629)		(644)		—		—
Amortization of prior service credit	—		—		(1)		(1)
Recognized actuarial loss (credit)	120		77		(1)		(1)
Net periodic benefit credit	$	(160)	$	(179)	$	—	$	—
Settlement loss	—		4		—		—
Total credit	$	(160)	$	(175)	$	—	$	—

Amounts Recorded in the Consolidated Statement of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Compensation and benefits expense (Operating income)	$	10	$	10	$	—	$	—
Other net benefit credits	(60)		(69)		—		—
Total credit	$	(50)	$	(59)	$	—	$	—

Amounts Recorded in the Consolidated Statement of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Compensation and benefits expense (Operating income)	$	27	$	28	$	—	$	—
Other net benefit credits	(187)		(203)		—		—
Total credit	$	(160)	$	(175)	$	—	$	—

U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Interest cost	$	53	$	61	$	1	$	1
Expected return on plan assets	(86)		(86)		—		—
Recognized actuarial loss (credit)	18		11		(1)		(1)
Net periodic benefit credit	$	(15)	$	(14)	$	—	$	—

U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Interest cost	$	160	$	181	$	1	$	1
Expected return on plan assets	(259)		(257)		—		—
Recognized actuarial loss (credit)	54		33		(1)		(1)
Net periodic benefit credit	$	(45)	$	(43)	$	—	$	—

Significant non-U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	10	$	10	$	—	$	—
Interest cost	59		59		—		—
Expected return on plan assets	(126)		(128)		—		—
Recognized actuarial loss	22		14		—		—
Net periodic benefit credit	$	(35)	$	(45)	$	—	$	—

Significant non-U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	27	$	28	$	—	$	—
Interest cost	162		179		1		1
Expected return on plan assets	(370)		(387)		—		—
Amortization of prior service credit	—		—		(1)		(1)
Recognized actuarial loss	66		44		—		—
Net periodic benefit credit	$	(115)	$	(136)	$	—	$	—
Settlement loss	—		4		—		—
Total credit	$	(115)	$	(132)	$	—	$	—

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				Post-retirement Benefits
September 30,	2020		2019		2020		2019
Weighted average assumptions:
Expected return on plan assets	5.31	%	5.74	%	—		—
Discount rate	2.57	%	3.48	%	2.72	%	3.65	%
Rate of compensation increase	1.76	%	1.74	%	—		—

The Company made approximately $81 million of contributions to its U.S. and non-U.S. defined benefit pension plans for the nine months ended September 30, 2020. The Company expects to contribute approximately $63 million to its U.S. and non-U.S. defined benefit pension plans during the remainder of 2020.

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 was $110 million and $106 million for the nine months ended September 30, 2020 and 2019, respectively. The cost of the U.K. DC Plans was $94 million and $74 million for the nine months ended September 30, 2020 and 2019, respectively.

XML

Debt

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Debt

Debt

The Company’s outstanding debt is as follows:

(In millions)	September 30, 2020		December 31, 2019
Short-term:
Current portion of long-term debt	$	1,216	$	1,215
	1,216		1,215
Long-term:
Senior notes – 2.35% due 2020	—		500
Senior notes – 3.50% due 2020	700		698
Senior notes – 4.80% due 2021	500		499
Senior notes - Floating rate due 2021	299		298
Senior notes – 2.75% due 2022	499		498
Senior notes – 3.30% due 2023	349		349
Senior notes – 4.05% due 2023	249		249
Senior notes – 3.50% due 2024	598		597
Senior notes – 3.875% due 2024	995		994
Senior notes – 3.50% due 2025	497		497
Senior notes – 1.349% due 2026	641		609
Senior notes – 3.75% due 2026	597		597
Senior notes – 4.375% due 2029	1,499		1,499
Senior notes – 1.979% due 2030	635		607
Senior notes – 2.250% due 2030	737		—
Senior notes – 5.875% due 2033	298		298
Senior notes – 4.75% due 2039	495		494
Senior notes – 4.35% due 2047	493		492
Senior notes – 4.20% due 2048	592		592
Senior notes – 4.90% due 2049	1,237		1,237
Mortgage – 5.70% due 2035	334		345
Term loan facility - two year	500		—
Other	4		7
	12,748		11,956
Less current portion	1,216		1,215
	$	11,532	$	10,741

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

The Company has established a short-term debt financing program of up to $1.5 billion through the issuance of commercial paper. The proceeds from the issuance of commercial paper are used for general corporate purposes. The Company had no commercial paper outstanding at September 30, 2020.

Credit Facilities

The Company and certain of its foreign subsidiaries have a multi-currency five-year unsecured revolving credit facility of $1.8 billion. The interest rate on this facility is based on LIBOR plus a fixed margin which varies with the Company's credit ratings. This facility expires in October 2023 and requires the Company to maintain certain coverage and leverage ratios which are tested quarterly. The facility includes a provision for determining a LIBOR successor rate in the event LIBOR reference rates are no longer available. In such case, the rate would be determined using an alternate reference rate that has been broadly accepted by the syndicated loan market in the United States in lieu of LIBOR (the “LIBOR successor rate”). If no LIBOR successor rate has been determined, the rate will be based on the higher of the rate announced publicly by Citibank, New York, NY, as its base rate or the fed funds rate plus a fixed margin. The Company borrowed $1 billion under this facility in the first quarter of 2020, which

was repaid in full during the second quarter of 2020. There were no borrowings outstanding under this facility at September 30, 2020.

In January 2020, the Company entered into two new term loan facilities: a $500 million one-year facility and a $500 million two-year facility. The interest rate on these facilities is based on LIBOR plus a fixed margin which varies with the Company's credit ratings. The facilities require the Company to maintain coverage ratios and leverage ratios consistent with the revolving credit facility discussed above. The facilities include a provision for determining a LIBOR successor rate in the event LIBOR reference rates are no longer available, which is expected to occur by the end of 2021.These facilities are expected to expire on or around the time that LIBOR is expected to be replaced by a successor rate. During the third quarter of 2020, the Company repaid the $500 million of borrowings on its one-year facility. The Company had $500 million of borrowings outstanding under its two-year facility and no borrowings outstanding under its one-year facility at September 30, 2020.

In April 2020, the Company entered into a new 364 day $1 billion unsecured revolving credit facility with a term out option after one year. The facility has similar coverage and leverage ratios as the facility discussed above. As of the date of this report the Company had no borrowings under this facility.

Senior Notes

In May 2020, the Company issued $750 million of 2.250% Senior Notes due 2030. The Company used the net proceeds to reduce outstanding short term borrowings.

In March 2020, the Company repaid $500 million of maturing senior notes.

In September 2019, the Company repaid $300 million of maturing senior notes.

In connection with the closing of the JLT Transaction, the Company assumed approximately $1 billion of historical JLT indebtedness. In April and June of 2019, the Company repaid approximately $450 million and $553 million, respectively, representing all of JLT's debt it acquired upon the closing of the JLT Transaction. The Company incurred debt extinguishment costs of $32 million due to the debt repayments.

In March 2019, the Company issued €550 million of 1.349% Senior Notes due 2026 and €550 million of 1.979% Senior Notes due 2030. In addition, the Company issued an additional $250 million of 4.375% Senior Notes due 2029, in March 2019. These notes constitute a further issuance of the 4.375% Senior Notes due 2029, of which $1.25 billion aggregate principal amount was issued in January 2019 (see below). After giving effect to the issuance of the notes, the Company has $1.5 billion aggregate principal amount of 4.375% Senior Notes due 2029. The Company used part of the net proceeds from these offerings, along with the $5 billion of Senior Notes issued in January 2019 (discussed above) primarily to fund the acquisition of JLT, including the payment of related fees and expenses, and to repay certain JLT indebtedness, as well as for general corporate purposes.

In January 2019, the Company issued $700 million of 3.50% Senior Notes due 2020, $1 billion of 3.875% Senior Notes due 2024, $1.25 billion of 4.375% Senior Notes due 2029, $500 million of 4.75% Senior Notes due 2039, $1.25 billion of 4.90% Senior Notes due 2049 and $300 million of Floating Rate Senior Notes due 2021. The floating rate notes are based on LIBOR plus a fixed margin. These notes are due prior to the date that LIBOR is expected to be replaced by a successor rate, which is expected to occur in 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, 2020				December 31, 2019
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Short-term debt	$	1,216	$	1,234	$	1,215	$	1,229
Long-term debt	$	11,532	$	13,480	$	10,741	$	11,953

The fair value of the Company’s short-term debt consists primarily of borrowings from the term loan and revolving credit facilities 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.

XML

Restructuring Costs

9 Months Ended

Sep. 30, 2020

Restructuring and Related Activities [Abstract]

Restructuring Costs

Restructuring Costs

JLT Related Integration and Restructuring

The Company is currently integrating JLT, which involves combining the business practices and co-locating colleagues in most geographies, rationalizing real estate leases around the world, realizing of synergies and migrating legacy JLT systems onto the Company's information technology environment and security protocols. The Company is also incurring cost for consulting fees related to integration management processes and legal fees related to rationalizing legal entity structures to reduce costs, mitigate risks and improve operational transparency.

Costs will be recognized based on applicable accounting guidance which includes accounting for disposal or exit activities, guidance related to impairment of long lived assets (for right of use assets related to real estate leases), as well as other costs resulting from accelerated depreciation or amortization of leasehold improvements and other property and equipment. Based on its current estimates, the Company expects to incur costs of approximately $700 million in connection with the integration and restructuring of the combined businesses, primarily related to severance, real estate rationalization, information technology rationalization, consulting fees related to the management of the integration processes and legal fees related to the rationalization of legal entity structures. The Company incurred $335 million of costs in 2019 and $181 million in the first nine months of 2020 and expects the remaining costs to be incurred during the fourth quarter of 2020 and in 2021. These integration and restructuring plans may change during implementation, which may change our current cost and related savings estimates, as the Company continues to refine its detailed plans for each business and location.

In connection with the JLT integration and restructuring, in the first nine months of 2020 the Company incurred costs of $181 million: $125 million in RIS, $31 million in Consulting, and $25 million in Corporate. The severance and related costs were included in compensation and benefits and the other costs were included in other operating expenses in the consolidated statement of income.

After further evaluation of our sublease assumptions, the Company recorded a ROU asset impairment charge of $9 million for the nine month period ended September 30, 2020 to reflect the current market environment.

Details of the JLT integration and restructuring activity from January 1, 2019 through September 30, 2020, is as follows:    

(In millions)	Severance		Real Estate Related Costs (a)		Information Technology (a)		Consulting and Other Outside Services (b)		Total
Liability at 1/1/19	$	—	$	—	$	—	$	—	$	—
2019 Charges	154		38		45		98		335
Cash payments	(112)		(14)		(45)		(94)		(265)
Non-cash charges	—		(19)		—		(4)		(23)
Liability at 12/31/19	$	42	$	5	$	—	$	—	$	47
2020 Charges	38		42		45		56		181
Cash payments	(70)		(15)		(40)		(44)		(169)
Non-cash charges	—		(26)		(5)		—		(31)
Liability at 9/30/2020	$	10	$	6	$	—	$	12	$	28

(a) Includes data center contract termination costs and temporary infrastructure leasing costs.

(b) Includes consulting fees related to the management of the integration processes and legal fees related to the rationalization of legal entity structures.

Other Restructuring

During 2018 and 2019, Marsh initiated programs to simplify its organization structure and realign and rebrand certain of its businesses. The Company incurred severance and consulting costs of $2 million for the nine month period ended September 30, 2020, related to these initiatives.

During the fourth quarter of 2018, Mercer initiated a program to restructure its business to further optimize the way Mercer operates, setting up the Company for a more fluid and nimble structure and operating model for the future. The Company incurred restructuring severance and consulting costs of $17 million for the nine month period ended September 30, 2020 related to this initiative.

In addition to the charges discussed above, the Company incurred costs of $24 million at Corporate in 2020 that reflects cost to modernize the Company's information technology systems and security protocols, consulting costs related to the restructure of the Global HR function and adjustments to restructuring liabilities for future rent under non-cancellable leases.

After further evaluation of our sublease assumptions, the Company recorded a ROU asset impairment charge of $3 million for the nine month period ended September 30, 2020 to reflect the current market environment.

The following details other restructuring liabilities for actions initiated prior to 2020:

(In millions)	Liability at 1/1/19		Amounts Accrued		Cash Paid		Other		Liability at 12/31/19		Amounts Accrued		Cash Paid		Other		Liability at 9/30/2020
Severance	$	73	$	73	$	(91)	$	(4)	$	51	$	15	$	(51)	$	—	$	15
Future rent under non-cancelable leases and other costs	39		39		(21)		(6)		51		28		(34)		(2)		$	43
Total	$	112	$	112	$	(112)	$	(10)	$	102	$	43	$	(85)	$	(2)	$	58

The expenses associated with the above 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.

XML

Common Stock

9 Months Ended

Sep. 30, 2020

Equity [Abstract]

Common Stock

Common Stock

There were no repurchases of the Company's common stock during the first nine months of 2020. The Company does not expect to repurchase shares for the remainder of 2020. In November 2019, the Board of Directors of the Company authorized the Company to repurchase up to $2.5 billion in shares of the Company's common stock, which superseded any prior authorizations. As of September 30, 2020, the Company remained authorized to repurchase up to approximately $2.4 billion in shares of its common stock. There is no time limit on the authorization. During the first nine months of 2019 the Company repurchased approximately 3.1 million shares of its common stock for consideration of $300 million.

The Company issued approximately 3.4 million and 4.2 million shares related to stock compensation and employee stock purchase plans during the first nine months of 2020 and 2019, respectively.

XML

Claims, Lawsuits And Other Contingencies

9 Months Ended

Sep. 30, 2020

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. See Note 8 to the consolidated financial statements for additional information. 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.

Litigation Matters

The Company and its subsidiaries are subject to a significant number of claims, lawsuits and proceedings in the ordinary course of 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, investment advisory, and investment management services for corporate and public sector clients, 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 may 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 Group, 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.

Governmental Inquiries and Enforcement Matters

Our activities are regulated under the laws of the United States and its various states, the European Union and its member states, and the other jurisdictions in which the Company operates.

Risk and Insurance Services Segment

•In April 2017, the Financial Conduct Authority in the United Kingdom (the "FCA") commenced a civil competition investigation into the aviation insurance and reinsurance sector. In connection with that investigation, the FCA carried out an on-site inspection at the London offices of Marsh Limited, our Marsh and Guy Carpenter operating subsidiary in the United Kingdom, and JLT Specialty Ltd., JLT's U.K. operating subsidiary. The FCA indicated that it had reasonable grounds for suspecting that Marsh Limited, JLT Specialty Ltd. and other participants in the market had been sharing competitively sensitive information within the aviation insurance and reinsurance broking sector.

In October 2017, the Company received a notice that the Directorate-General for Competition of the European Commission had commenced a civil investigation of a number of insurance brokers, including both Marsh and JLT, regarding "the exchange of commercially sensitive information between competitors in relation to aviation and aerospace insurance and reinsurance broking products and services in the European Economic Area ("EEA"), as well as possible coordination between competitors." In light of the action taken by the European Commission, the FCA informed Marsh Limited and JLT Specialty Ltd. that it had discontinued its investigation under U.K. competition law. In May 2018, the FCA advised that it would not be taking any further action with Marsh Limited or JLT Specialty Ltd. in connection with this matter.

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. 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. At least three

of these individuals, including the former JLT employee, have since pleaded guilty to criminal charges. We are cooperating with all ongoing investigations related to this matter.

At this time, we are unable to predict the likely timing, outcome or ultimate impact of the foregoing investigations or any related 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.

Consulting Segment

In 2014, the FCA conducted a thematic 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 JLT’s ETV pension transfer advice. 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 cases 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 the acquisition, JLT recorded a gross liability of approximately £59 million (or approximately $77 million) based primarily upon the results of the Skilled Person report together with the expected costs of the ETV file review. This estimate was based on a review of a limited number of the total files. As of September 30, 2020, that estimated liability increased to approximately £62 million (or approximately $79 million) to reflect the increased compliance costs of the ongoing review. As the review and redress calculations are completed for the outstanding files, the ultimate liability may increase significantly. We expect this gross liability to be partially offset by insurance recoveries from JLT’s insurers and indemnification claims.

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 were reinsured up to £40 million by a related party of River Thames. Payment of claims under the reinsurance agreement is collateralized by segregated assets held in a trust. As of September 30, 2020, the reinsurance coverage exceeded the best estimate of the projected liability of the policies covered by the guarantee. 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.

XML

Segment Information

9 Months Ended

Sep. 30, 2020

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 Oliver Wyman Group.

The accounting policies of the segments are the same as those used for the consolidated financial statements described in Note 1 to the Company’s 2019 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.

Prior to being acquired by the Company, JLT operated in three segments: Specialty, Reinsurance and Employee Benefits. JLT operated in 41 countries, with significant revenue in the United Kingdom, Pacific, Asia and the United States. As of April 1, 2019, the historical JLT businesses were combined into MMC operations as follows: JLT Specialty is included by geography within Marsh, JLT Reinsurance is included in Guy Carpenter and the majority of JLT's Employee Benefits business was included in Mercer Health and Wealth.

Selected information about the Company’s operating segments for the three and nine-month periods ended September 30, 2020 and 2019 are as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(In millions)	Revenue			Operating Income (Loss)		Revenue			Operating Income (Loss)
2020–
Risk and Insurance Services	$	2,291	(a)	$	333	$	7,805	(c)	$	1,883
Consulting	1,696		(b)	278		5,074		(d)	815
Total Operating Segments	3,987			611		12,879			2,698
Corporate/Eliminations	(19)			(71)		(71)			(203)
Total Consolidated	$	3,968		$	540	$	12,808		$	2,495
2019–
Risk and Insurance Services	$	2,206	(a)	$	218	$	7,203	(c)	$	1,468
Consulting	1,785		(b)	317		5,258		(d)	874
Total Operating Segments	3,991			535		12,461			2,342
Corporate/Eliminations	(23)			(68)		(73)			(257)
Total Consolidated	$	3,968		$	467	$	12,388		$	2,085

(a) Includes inter-segment revenue of $3 million in 2019, interest income on fiduciary funds of $8 million and $31 million in 2020 and 2019, respectively, and equity method loss of $6 million in 2020 and equity method income of $10 million in 2019.

(b) Includes inter-segment revenue of $19 million and $20 million in 2020 and 2019, respectively, interest income on fiduciary funds of less than $1 million in both 2020 and 2019.

(c) Includes inter-segment revenue of $5 million and $7 million in 2020 and 2019, respectively, interest income on fiduciary funds of $40 million and $80 million in 2020 and 2019, respectively, and equity method income of $7 million and $16 million in 2020 and 2019, respectively.

(d) Includes inter-segment revenue of $66 million in both 2020 and 2019, interest income on fiduciary funds of $1 million and $2 million in 2020 and 2019, respectively, and equity method income of $4 million and $10 million in 2020 and 2019, respectively.

Details of operating segment revenue for the three and nine-month periods ended September 30, 2020 and 2019 are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Risk and Insurance Services
Marsh	$	2,015	$	1,923	$	6,259	$	5,850
Guy Carpenter	276		283		1,546		1,353
Total Risk and Insurance Services	2,291		2,206		7,805		7,203
Consulting
Mercer	1,216		1,280		3,616		3,695
Oliver Wyman Group	480		505		1,458		1,563
Total Consulting	1,696		1,785		5,074		5,258
Total Operating Segments	3,987		3,991		12,879		12,461
Corporate/Eliminations	(19)		(23)		(71)		(73)
Total	$	3,968	$	3,968	$	12,808	$	12,388

XML

New Accounting Guidance

9 Months Ended

Sep. 30, 2020

Accounting Standards Update and Change in Accounting Principle [Abstract]

New Accounting Guidance

New Accounting Guidance

New Accounting Pronouncements Adopted Effective January 1, 2020:

In August 2018, the FASB issued new guidance that amends required fair value measurement disclosures. The guidance adds new requirements, eliminates some current disclosures and modifies other required disclosures. The new disclosure requirements, along with modifications made to disclosures as a result of the change in requirements for narrative descriptions of measurement uncertainty, must be applied on a prospective basis. The effects of all other amendments included in the guidance must be applied retrospectively for all periods presented. The adoption of this guidance impacted disclosures only and did not have an impact on the Company's financial position or results of operations.

In January 2017, the FASB issued new guidance to simplify the test for goodwill impairment. The new guidance eliminates the second step in the current two-step goodwill impairment process, under which a goodwill impairment loss is measured by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill for that reporting unit. The new guidance requires a one-step impairment test, in which the goodwill impairment charge is based on the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The guidance should be applied on a prospective basis with the nature of and reason for the change in accounting principle disclosed upon transition. The adoption of this standard did not have an impact on the Company's financial position or results of operations.

In June 2016, the FASB issued new guidance on the impairment of financial instruments. The new guidance adds a CECL impairment model that is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of lifetime expected credit losses, which the FASB believes will result in more timely recognition of such losses. The new standard is also intended to reduce the complexity of U.S. GAAP by decreasing the number of credit impairment models that entities use to account for debt instruments. Further, the new standard makes targeted changes to the impairment model for available-for-sale debt securities. The adoption of this standard did not have a material impact on the Company's financial position or results of operations.

New Accounting Pronouncements Effective January 1, 2019:

The following new accounting standard was adopted using a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of January 1, 2019:

Leases

In February 2016, the FASB issued new guidance intended to improve financial reporting for leases. Under the new guidance, a lessee is required to recognize assets and liabilities for leases. Consistent with legacy GAAP, the recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee will depend on the classification of the lease as financing or operating. However, unlike legacy GAAP, which requires that only capital leases are recognized on the balance sheet, the new guidance requires that both operating and

financing leases be recognized on the balance sheet. The Company adopted this new standard effective January 1, 2019, using a modified retrospective method, applying the new guidance as of the beginning of the year of adoption, with a cumulative effect of initially applying the guidance recognized as an adjustment to retained earnings at January 1, 2019. Therefore, prior period information has not been restated. The Company has elected the package of practical expedients, which among other things, allows historical lease classifications to be carried forward. The Company did not elect the hindsight practical expedient in determining lease term and impairment of an entity's ROU assets. On January 1, 2019, the Company recognized a lease liability of $1.9 billion and ROU asset of $1.7 billion, related to real estate operating leases. The ROU asset also reflected reclassification adjustments primarily from other liabilities related to existing deferred rent, unamortized lease incentives and restructuring liabilities of $0.2 billion upon adoption. There was no cumulative-effect adjustment required to be booked to retained earnings upon transition. The adoption of this standard did not have a material impact on our income statement as compared to prior periods.

The following new accounting standards were adopted prospectively as of January 1, 2019:

Derivatives and Hedging

In August 2017, the FASB issued new guidance intended to refine and expand hedge accounting for both financial and commodity risks. The guidance creates more transparency around how economic results are presented in both the financial statements and the footnotes, as well as making targeted improvements to simplify the application of hedge accounting guidance. The Company adopted this guidance effective January 1, 2019. The adoption of this standard did not have an impact on the Company's financial position or results of operations.

Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

In February 2018, the FASB issued new guidance that allowed an entity to reclassify the stranded tax effects resulting from the Tax Cuts and Job Act (the "TCJA") from accumulated other comprehensive income ("AOCI") to retained earnings. The guidance is effective for the period beginning January 1, 2019. The Company elected not to reclassify the stranded income tax effects of the TCJA from AOCI to retained earnings. The adoption of this standard had no impact on the Company's financial position or results of operations. The Company’s accounting policy related to releasing income tax effects from AOCI follows the portfolio approach.

New Accounting Pronouncements Not Yet Adopted

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 contract 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. Early adoption is permitted. The adoption of this standard is not expected to 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 Company is currently evaluating the impact this standard will have on its financial position and results of operations.

In August 2018, the FASB issued new guidance that amends disclosures related to Defined Benefit Plans. The guidance removes disclosures that no longer are considered cost-beneficial, clarifies the specific requirements of certain disclosures, and adds disclosure requirements identified as relevant. The guidance must be applied on a retrospective basis. The guidance is effective for fiscal years ending after December 15, 2020. Early adoption is permitted. Adoption of this guidance will impact disclosures only and will not have an impact on the Company's financial position or results of operations.

XML

Principles of Consolidation and Other Matters (Policies)

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Accounting

The consolidated financial statements included herein have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission. While certain information and footnote 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 for interim filings, the Company believes that the information and disclosures presented are adequate to make such information and disclosures not misleading.

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.

Allowance for Credit Losses on Accounts Receivable

The Company’s policy for providing an allowance for current expected credit losses (“CECL”) on its accounts receivable is based on management’s best estimate of amounts that will be uncollectible primarily based on the Company’s historical experience of collections in its various businesses and other events that may affect the net realizable value of receivables. The charge related to expected credit losses was immaterial to the consolidated statement of income in the three and nine month periods ended September 30, 2020.

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 that are accounted for under 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 the Company's proportionate share of the change in fair value of the funds are recorded in earnings. Investments

accounted for using the equity method of accounting are included in "other assets" in the consolidated balance sheets.

Income Taxes

The Company's effective tax rate in the third quarter of 2020 was 30.3% compared with 26.0% in the third quarter of 2019. The effective tax rates for the first nine months of 2020 and 2019 were 26.0% and 27.8%. The rate in the third quarter and first nine months of 2020 reflects costs of re-measuring the Company’s U.K. deferred tax liability for legislation that cancelled a scheduled 2% reduction in the U.K. corporate income tax rate, partially offset by tax benefits related to a new international funding structure implemented to facilitate global staffing and contracting.

The rate in the first nine months of 2019 reflects discrete adjustments related to the JLT acquisition, including tax on the disposition of JLT’s aerospace business and nondeductible expenses incurred in connection with the JLT Transaction. The tax rates in both periods reflect the impact of discrete tax items such as excess tax benefits related to share-based compensation, changes in tax legislation, changes in uncertain tax positions, deferred tax adjustments and nontaxable adjustments to contingent acquisition consideration.

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 limitation.

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.

Integration and Restructuring Charges

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 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 right-of-use 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 right-of-use asset is determined based on the present value of the estimated net cash flows related to the property. Contractual costs outside of the right-of-use 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 mutual funds are valued using a valuation technique that results in price per share at $1.00.

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 Pronouncements

New Accounting Guidance

New Accounting Pronouncements Adopted Effective January 1, 2020:

In August 2018, the FASB issued new guidance that amends required fair value measurement disclosures. The guidance adds new requirements, eliminates some current disclosures and modifies other required disclosures. The new disclosure requirements, along with modifications made to disclosures as a result of the change in requirements for narrative descriptions of measurement uncertainty, must be applied on a prospective basis. The effects of all other amendments included in the guidance must be applied retrospectively for all periods presented. The adoption of this guidance impacted disclosures only and did not have an impact on the Company's financial position or results of operations.

In January 2017, the FASB issued new guidance to simplify the test for goodwill impairment. The new guidance eliminates the second step in the current two-step goodwill impairment process, under which a goodwill impairment loss is measured by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill for that reporting unit. The new guidance requires a one-step impairment test, in which the goodwill impairment charge is based on the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The guidance should be applied on a prospective basis with the nature of and reason for the change in accounting principle disclosed upon transition. The adoption of this standard did not have an impact on the Company's financial position or results of operations.

In June 2016, the FASB issued new guidance on the impairment of financial instruments. The new guidance adds a CECL impairment model that is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of lifetime expected credit losses, which the FASB believes will result in more timely recognition of such losses. The new standard is also intended to reduce the complexity of U.S. GAAP by decreasing the number of credit impairment models that entities use to account for debt instruments. Further, the new standard makes targeted changes to the impairment model for available-for-sale debt securities. The adoption of this standard did not have a material impact on the Company's financial position or results of operations.

New Accounting Pronouncements Effective January 1, 2019:

The following new accounting standard was adopted using a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of January 1, 2019:

Leases

In February 2016, the FASB issued new guidance intended to improve financial reporting for leases. Under the new guidance, a lessee is required to recognize assets and liabilities for leases. Consistent with legacy GAAP, the recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee will depend on the classification of the lease as financing or operating. However, unlike legacy GAAP, which requires that only capital leases are recognized on the balance sheet, the new guidance requires that both operating and

financing leases be recognized on the balance sheet. The Company adopted this new standard effective January 1, 2019, using a modified retrospective method, applying the new guidance as of the beginning of the year of adoption, with a cumulative effect of initially applying the guidance recognized as an adjustment to retained earnings at January 1, 2019. Therefore, prior period information has not been restated. The Company has elected the package of practical expedients, which among other things, allows historical lease classifications to be carried forward. The Company did not elect the hindsight practical expedient in determining lease term and impairment of an entity's ROU assets. On January 1, 2019, the Company recognized a lease liability of $1.9 billion and ROU asset of $1.7 billion, related to real estate operating leases. The ROU asset also reflected reclassification adjustments primarily from other liabilities related to existing deferred rent, unamortized lease incentives and restructuring liabilities of $0.2 billion upon adoption. There was no cumulative-effect adjustment required to be booked to retained earnings upon transition. The adoption of this standard did not have a material impact on our income statement as compared to prior periods.

The following new accounting standards were adopted prospectively as of January 1, 2019:

Derivatives and Hedging

In August 2017, the FASB issued new guidance intended to refine and expand hedge accounting for both financial and commodity risks. The guidance creates more transparency around how economic results are presented in both the financial statements and the footnotes, as well as making targeted improvements to simplify the application of hedge accounting guidance. The Company adopted this guidance effective January 1, 2019. The adoption of this standard did not have an impact on the Company's financial position or results of operations.

Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

In February 2018, the FASB issued new guidance that allowed an entity to reclassify the stranded tax effects resulting from the Tax Cuts and Job Act (the "TCJA") from accumulated other comprehensive income ("AOCI") to retained earnings. The guidance is effective for the period beginning January 1, 2019. The Company elected not to reclassify the stranded income tax effects of the TCJA from AOCI to retained earnings. The adoption of this standard had no impact on the Company's financial position or results of operations. The Company’s accounting policy related to releasing income tax effects from AOCI follows the portfolio approach.

New Accounting Pronouncements Not Yet Adopted

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 contract 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. Early adoption is permitted. The adoption of this standard is not expected to 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 Company is currently evaluating the impact this standard will have on its financial position and results of operations.

In August 2018, the FASB issued new guidance that amends disclosures related to Defined Benefit Plans. The guidance removes disclosures that no longer are considered cost-beneficial, clarifies the specific requirements of certain disclosures, and adds disclosure requirements identified as relevant. The guidance must be applied on a retrospective basis. The guidance is effective for fiscal years ending after December 15, 2020. Early adoption is permitted. Adoption of this guidance will impact disclosures only and will not have an impact on the Company's financial position or results of operations.

XML

Revenue (Tables)

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

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

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Marsh:
EMEA	$	536	$	536	$	1,887	$	1,821
Asia Pacific	254		242		790		698
Latin America	93		110		283		304
Total International	883		888		2,960		2,823
U.S./Canada	1,126		1,014		3,271		2,972
Total Marsh	2,009		1,902		6,231		5,795
Guy Carpenter	274		273		1,534		1,328
Subtotal	2,283		2,175		7,765		7,123
Fiduciary interest income	8		31		40		80
Total Risk and Insurance Services	$	2,291	$	2,206	$	7,805	$	7,203
Mercer:
Wealth	$	566	$	592	$	1,719	$	1,748
Health	430		441		1,348		1,341
Career	220		247		549		606
Total Mercer	1,216		1,280		3,616		3,695
Oliver Wyman	480		505		1,458		1,563
Total Consulting	$	1,696	$	1,785	$	5,074	$	5,258

Contract with Customer, Asset and Liability

The following schedule provides contract assets and contract liabilities information from contracts with customers.

(In millions)	September 30, 2020		December 31, 2019
Contract Assets	$	257	$	207
Contract Liabilities	$	648	$	593

XML

Per Share Data (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

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 amounts)	2020		2019		2020		2019
Net income before non-controlling interests	$	320	$	306	$	1,667	$	1,377
Less: Net income attributable to non-controlling interests	4		3		25		26
Net income attributable to the Company	$	316	$	303	$	1,642	$	1,351
Basic weighted average common shares outstanding	507		506		506		506
Dilutive effect of potentially issuable common shares	5		5		5		5
Diluted weighted average common shares outstanding	512		511		511		511
Average stock price used to calculate common stock equivalents	$	114.64	$	99.97	$	107.64	$	94.75

XML

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

9 Months Ended

Sep. 30, 2020

Supplemental Cash Flow Information [Abstract]

Additional Information Concerning Acquisitions, Interest and Income Taxes Paid

The following schedule provides additional information concerning acquisitions, interest and income taxes paid for the nine-month periods ended September 30, 2020 and 2019.

(In millions)	2020		2019
Assets acquired, excluding cash	$	795	$	8,619
Liabilities assumed	(73)		(2,758)
Non-controlling interests assumed	—		(295)
Contingent/deferred purchase consideration	(163)		(66)
Net cash outflow for current year acquisitions	$	559	$	5,500

(In millions)	2020		2019
Interest paid	$	437	$	387
Income taxes paid, net of refunds	$	414	$	442

XML

Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2020

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-month periods ended September 30, 2020 and 2019, including amounts reclassified out of AOCI, are as follows:

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of July 1, 2020	$	(3,346)	$	(2,236)	$	(5,582)
Other comprehensive (loss) income before reclassifications	(94)		497		403
Amounts reclassified from accumulated other comprehensive income	31		—		31
Net current period other comprehensive (loss) income	(63)		497		434
Balance as of September 30, 2020	$	(3,409)	$	(1,739)	$	(5,148)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of July 1, 2019	$	(2,942)	$	(1,585)	$	(4,527)
Other comprehensive income (loss) before reclassifications	56		(475)		(419)
Amounts reclassified from accumulated other comprehensive income	15		—		15
Net current period other comprehensive income (loss)	71		(475)		(404)
Balance as of September 30, 2019	$	(2,871)	$	(2,060)	$	(4,931)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of December 31, 2019	$	(3,512)	$	(1,543)	$	(5,055)
Other comprehensive income (loss) before reclassifications	12		(196)		(184)
Amounts reclassified from accumulated other comprehensive income	91		—		91
Net current period other comprehensive income (loss)	103		(196)		(93)
Balance as of September 30, 2020	$	(3,409)	$	(1,739)	$	(5,148)

(In millions)	Pension/Post-Retirement Plans Gains (Losses)		Foreign Currency Translation Gains (Losses)		Total Gains (Losses)
Balance as of December 31, 2018	$	(2,953)	$	(1,694)	$	(4,647)
Other comprehensive income (loss) before reclassifications	26		(366)		(340)
Amounts reclassified from accumulated other comprehensive income	56		—		56
Net current period other comprehensive income (loss)	82		(366)		(284)
Balance as of September 30, 2019	$	(2,871)	$	(2,060)	$	(4,931)

Schedule of Components of Comprehensive Income (Loss)

The components of other comprehensive income (loss) for the three and nine-month periods ended September 30, 2020 and 2019 are as follows:

Three Months Ended September 30,	2020						2019
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	500	$	3	$	497	$	(475)	$	—	$	(475)
Pension/post-retirement plans:
Amortization of (gains) losses included in net periodic pension cost:
Prior service credits (a)	—		—		—		(1)		(1)		—
Net actuarial losses (a)	40		9		31		25		6		19
Effect of remeasurement (a)	—		—		—		(8)		(2)		(6)
Effect of settlement (a)	—		—		—		2		—		2
Subtotal	40		9		31		18		3		15
Foreign currency translation adjustments	(113)		(19)		(94)		64		8		56
Pension/post-retirement plans (losses) gains	(73)		(10)		(63)		82		11		71
Other comprehensive income (loss)	$	427	$	(7)	$	434	$	(393)	$	11	$	(404)
(a) Components of net periodic pension cost are 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,	2020						2019
(In millions)	Pre-Tax		Tax (Credit)		Net of Tax		Pre-Tax		Tax (Credit)		Net of Tax
Foreign currency translation adjustments	$	(200)	$	(4)	$	(196)	$	(366)	$	—	$	(366)
Pension/post-retirement plans:
Amortization of (gains) losses included in net periodic pension cost:
Prior service credits (a)	(1)		—		(1)		(2)		(1)		(1)
Net actuarial losses (a)	120		28		92		77		18		59
Effect of remeasurement (a)	—		—		—		(9)		(2)		(7)
Effect of settlement (a)	—		—		—		6		1		5
Subtotal	119		28		91		72		16		56
Foreign currency translation adjustments	17		5		12		30		4		26
Pension/post-retirement plans gains	136		33		103		102		20		82
Other comprehensive income (loss)	$	(64)	$	29	$	(93)	$	(264)	$	20	$	(284)
(a) Components of net periodic pension cost are 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.

XML

Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2020

Business Combinations [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 2020 based on the estimated fair values for the acquisitions as of their respective acquisition dates:

Acquisitions through September 30, 2020
(In millions)
Cash	579
Estimated fair value of deferred/contingent consideration	163
Total consideration	$	742
Allocation of purchase price:
Cash and cash equivalents	20
Accounts receivable, net	27
Fixed assets, net	15
Other intangible assets	280
Goodwill	462
Other assets	11
Total assets acquired	815
Current liabilities	22
Other liabilities	51
Total liabilities assumed	73
Net assets acquired	$	742

Schedule of Acquired Finite-Lived Intangible Assets by Major Class

The following chart provides information about intangible assets acquired during 2020:

Intangible assets through September 30, 2020 (In millions)	Amount		Weighted Average Amortization Period
Client relationships	$	257	13.3 years
Other	23		4.5 years
	$	280

Pro-Forma Information

The following unaudited pro-forma financial data gives effect to the acquisitions made by the Company during 2020 and 2019. In accordance with accounting guidance related to pro-forma disclosures, the information presented for current year acquisitions is as if they occurred on January 1, 2019 and reflects acquisitions made in 2019 as if they occurred on January 1, 2018. The unaudited pro-forma information adjusts for the effects of amortization of acquired intangibles and additional interest expense related to the issuance of debt related to the JLT Transaction. 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 figures)	2020		2019		2020		2019
Revenue	$	3,968	$	4,016	$	12,859	$	12,979
Net income attributable to the Company	$	316	$	307	$	1,644	$	1,453
Basic net income per share attributable to the Company	$	0.62	$	0.61	$	3.25	$	2.87
Diluted net income per share attributable to the Company	$	0.62	$	0.60	$	3.22	$	2.84

XML

Goodwill and Other Intangibles (Tables)

9 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill are as follows:

September 30,
(In millions)	2020		2019
Balance as of January 1,	$	14,671	$	9,599
Goodwill acquired	462		4,962
Other adjustments(a)	(99)		(275)
Balance at September 30,	$	15,034	$	14,286

(a) Primarily reflects the impact of foreign exchange and dispositions.

Amortized Intangible Assets

The gross cost and accumulated amortization of identified intangible assets at September 30, 2020 and December 31, 2019 are as follows:

	September 30, 2020						December 31, 2019
(In millions)	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Client Relationships	$	3,644	$	1,095	$	2,549	$	3,494	$	897	$	2,597
Other (a)	381		219		162		380		203		177
Amortized intangibles	$	4,025	$	1,314	$	2,711	$	3,874	$	1,100	$	2,774

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

Estimated Future Aggregate Amortization Expense

The estimated future aggregate amortization expense is as follows:

For the Years Ending December 31,
(In millions)	Estimated Expense
2020 (excludes amortization through September 30, 2020)	$	92
2021	351
2022	323
2023	299
2024	286
Subsequent years	1,360
	$	2,711

XML

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

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, 2020 and December 31, 2019.

	Identical Assets (Level 1)				Observable Inputs (Level 2)				Unobservable Inputs (Level 3)				Total
(In millions)	09/30/20		12/31/19		09/30/20		12/31/19		09/30/20		12/31/19		09/30/20		12/31/19
Assets:
Financial instruments owned:
Exchange traded equity securities(a)	$	45	$	4	$	—	$	—	$	—	$	—	$	45	$	4
Mutual funds(a)	167		166		—		—		—		—		167		166
Money market mutual funds(b)	861		55		—		—		—		—		861		55
Other equity investment(a)	—		—		8		8		—		—		8		8
Contingent purchase consideration asset(c)	—		—		—		—		67		84		67		84
Total assets measured at fair value	$	1,073	$	225	$	8	$	8	$	67	$	84	$	1,148	$	317
Fiduciary Assets:
U.S. Treasury Bills	$	25	$	40	$	—	$	—	$	—	$	—	$	25	$	40
Money market funds	176		360		—		—		—		—		176		360
Total fiduciary assets measured at fair value	$	201	$	400	$	—	$	—	$	—	$	—	$	201	$	400
Liabilities:
Contingent purchase consideration liability(d)	$	—	$	—	$	—	$	—	$	230	$	225	$	230	$	225
Total liabilities measured at fair value	$	—	$	—	$	—	$	—	$	230	$	225	$	230	$	225

(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 at September 30, 2020 and other assets at December 31, 2019 in the consolidated balance sheets.

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

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

The table below sets forth a summary of the changes in fair value of the Company’s Level 3 liabilities for the three and nine month periods ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Balance at beginning of period	$	233	$	196	$	225	$	508
Net Additions	—		(7)		96		33
Payments	(23)		(13)		(101)		(58)
Revaluation Impact	18		6		8		26
Change in fair value of the FX contract	—		—		—		(325)
Other (a)	2		3		2		1
Balance at September 30,	$	230	$	185	$	230	$	185

(a) Primarily reflects the impact of foreign exchange.

XML

Leases (Tables)

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

Lease Cost and Additional Information

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

	Three Months ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020			2019
Lease Cost:
Operating lease cost	$	99	$	94	$	288		$	276
Short-term lease cost	1		4		3			7
Variable lease cost	28		37		92			113
Sublease income	(5)		(4)		(15)			(12)
Net lease cost	$	123	$	131	$	368		$	384
Other information:
Operating cash outflows from operating leases					$	306		$	288
Right of use assets obtained in exchange for new operating lease liabilities					$	162		$	112
Weighted-average remaining lease term – real estate					8.44 years			8.86 years
Weighted-average discount rate – real estate leases					3.02		%	3.09		%

Future Minimum Lease Payments for Operating Leases

Future minimum lease payments for the Company’s operating leases as of September 30, 2020 are as follows:

Payment Dates (In millions)	Real Estate Leases
Remainder of 2020	$	112
2021	390
2022	363
2023	315
2024	270
2025	242
Subsequent years	855
Total future lease payments	2,547
Less: Imputed interest	(310)
Total	$	2,237
Current lease liabilities	$	335
Long-term lease liabilities	1,902
Total lease liabilities	$	2,237

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

XML

Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The components of the net periodic benefit cost for defined benefit and other post-retirement plans are as follows:

Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	10	$	10	$	—	$	—
Interest cost	112		120		1		1
Expected return on plan assets	(212)		(214)		—		—
Recognized actuarial loss (credit)	40		25		(1)		(1)
Net periodic benefit credit	$	(50)	$	(59)	$	—	$	—
Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	27	$	28	$	—	$	—
Interest cost	322		360		2		2
Expected return on plan assets	(629)		(644)		—		—
Amortization of prior service credit	—		—		(1)		(1)
Recognized actuarial loss (credit)	120		77		(1)		(1)
Net periodic benefit credit	$	(160)	$	(179)	$	—	$	—
Settlement loss	—		4		—		—
Total credit	$	(160)	$	(175)	$	—	$	—

Amounts Recorded in the Consolidated Statement of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Compensation and benefits expense (Operating income)	$	10	$	10	$	—	$	—
Other net benefit credits	(60)		(69)		—		—
Total credit	$	(50)	$	(59)	$	—	$	—

Amounts Recorded in the Consolidated Statement of Income
Combined U.S. and significant non-U.S. Plans	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Compensation and benefits expense (Operating income)	$	27	$	28	$	—	$	—
Other net benefit credits	(187)		(203)		—		—
Total credit	$	(160)	$	(175)	$	—	$	—

U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Interest cost	$	53	$	61	$	1	$	1
Expected return on plan assets	(86)		(86)		—		—
Recognized actuarial loss (credit)	18		11		(1)		(1)
Net periodic benefit credit	$	(15)	$	(14)	$	—	$	—

U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Interest cost	$	160	$	181	$	1	$	1
Expected return on plan assets	(259)		(257)		—		—
Recognized actuarial loss (credit)	54		33		(1)		(1)
Net periodic benefit credit	$	(45)	$	(43)	$	—	$	—

Significant non-U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Three Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	10	$	10	$	—	$	—
Interest cost	59		59		—		—
Expected return on plan assets	(126)		(128)		—		—
Recognized actuarial loss	22		14		—		—
Net periodic benefit credit	$	(35)	$	(45)	$	—	$	—

Significant non-U.S. Plans only	Pension Benefits				Post-retirement Benefits
For the Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Service cost	$	27	$	28	$	—	$	—
Interest cost	162		179		1		1
Expected return on plan assets	(370)		(387)		—		—
Amortization of prior service credit	—		—		(1)		(1)
Recognized actuarial loss	66		44		—		—
Net periodic benefit credit	$	(115)	$	(136)	$	—	$	—
Settlement loss	—		4		—		—
Total credit	$	(115)	$	(132)	$	—	$	—

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				Post-retirement Benefits
September 30,	2020		2019		2020		2019
Weighted average assumptions:
Expected return on plan assets	5.31	%	5.74	%	—		—
Discount rate	2.57	%	3.48	%	2.72	%	3.65	%
Rate of compensation increase	1.76	%	1.74	%	—		—

XML

Debt (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Schedule of Outstanding Debt

The Company’s outstanding debt is as follows:

(In millions)	September 30, 2020		December 31, 2019
Short-term:
Current portion of long-term debt	$	1,216	$	1,215
	1,216		1,215
Long-term:
Senior notes – 2.35% due 2020	—		500
Senior notes – 3.50% due 2020	700		698
Senior notes – 4.80% due 2021	500		499
Senior notes - Floating rate due 2021	299		298
Senior notes – 2.75% due 2022	499		498
Senior notes – 3.30% due 2023	349		349
Senior notes – 4.05% due 2023	249		249
Senior notes – 3.50% due 2024	598		597
Senior notes – 3.875% due 2024	995		994
Senior notes – 3.50% due 2025	497		497
Senior notes – 1.349% due 2026	641		609
Senior notes – 3.75% due 2026	597		597
Senior notes – 4.375% due 2029	1,499		1,499
Senior notes – 1.979% due 2030	635		607
Senior notes – 2.250% due 2030	737		—
Senior notes – 5.875% due 2033	298		298
Senior notes – 4.75% due 2039	495		494
Senior notes – 4.35% due 2047	493		492
Senior notes – 4.20% due 2048	592		592
Senior notes – 4.90% due 2049	1,237		1,237
Mortgage – 5.70% due 2035	334		345
Term loan facility - two year	500		—
Other	4		7
	12,748		11,956
Less current portion	1,216		1,215
	$	11,532	$	10,741

Estimated Fair Value Of Significant Financial Instruments

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, 2020				December 31, 2019
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Short-term debt	$	1,216	$	1,234	$	1,215	$	1,229
Long-term debt	$	11,532	$	13,480	$	10,741	$	11,953

XML

Restructuring Costs (Tables)

9 Months Ended

Sep. 30, 2020

Restructuring and Related Activities [Abstract]

Restructuring Activities

Details of the JLT integration and restructuring activity from January 1, 2019 through September 30, 2020, is as follows:    

(In millions)	Severance		Real Estate Related Costs (a)		Information Technology (a)		Consulting and Other Outside Services (b)		Total
Liability at 1/1/19	$	—	$	—	$	—	$	—	$	—
2019 Charges	154		38		45		98		335
Cash payments	(112)		(14)		(45)		(94)		(265)
Non-cash charges	—		(19)		—		(4)		(23)
Liability at 12/31/19	$	42	$	5	$	—	$	—	$	47
2020 Charges	38		42		45		56		181
Cash payments	(70)		(15)		(40)		(44)		(169)
Non-cash charges	—		(26)		(5)		—		(31)
Liability at 9/30/2020	$	10	$	6	$	—	$	12	$	28

(a) Includes data center contract termination costs and temporary infrastructure leasing costs.

(b) Includes consulting fees related to the management of the integration processes and legal fees related to the rationalization of legal entity structures.

The following details other restructuring liabilities for actions initiated prior to 2020:

(In millions)	Liability at 1/1/19		Amounts Accrued		Cash Paid		Other		Liability at 12/31/19		Amounts Accrued		Cash Paid		Other		Liability at 9/30/2020
Severance	$	73	$	73	$	(91)	$	(4)	$	51	$	15	$	(51)	$	—	$	15
Future rent under non-cancelable leases and other costs	39		39		(21)		(6)		51		28		(34)		(2)		$	43
Total	$	112	$	112	$	(112)	$	(10)	$	102	$	43	$	(85)	$	(2)	$	58

XML

Segment Information (Tables)

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Selected Information And Details For MMC's Operating Segments

Selected information about the Company’s operating segments for the three and nine-month periods ended September 30, 2020 and 2019 are as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(In millions)	Revenue			Operating Income (Loss)		Revenue			Operating Income (Loss)
2020–
Risk and Insurance Services	$	2,291	(a)	$	333	$	7,805	(c)	$	1,883
Consulting	1,696		(b)	278		5,074		(d)	815
Total Operating Segments	3,987			611		12,879			2,698
Corporate/Eliminations	(19)			(71)		(71)			(203)
Total Consolidated	$	3,968		$	540	$	12,808		$	2,495
2019–
Risk and Insurance Services	$	2,206	(a)	$	218	$	7,203	(c)	$	1,468
Consulting	1,785		(b)	317		5,258		(d)	874
Total Operating Segments	3,991			535		12,461			2,342
Corporate/Eliminations	(23)			(68)		(73)			(257)
Total Consolidated	$	3,968		$	467	$	12,388		$	2,085

(a) Includes inter-segment revenue of $3 million in 2019, interest income on fiduciary funds of $8 million and $31 million in 2020 and 2019, respectively, and equity method loss of $6 million in 2020 and equity method income of $10 million in 2019.

(b) Includes inter-segment revenue of $19 million and $20 million in 2020 and 2019, respectively, interest income on fiduciary funds of less than $1 million in both 2020 and 2019.

(c) Includes inter-segment revenue of $5 million and $7 million in 2020 and 2019, respectively, interest income on fiduciary funds of $40 million and $80 million in 2020 and 2019, respectively, and equity method income of $7 million and $16 million in 2020 and 2019, respectively.

(d) Includes inter-segment revenue of $66 million in both 2020 and 2019, interest income on fiduciary funds of $1 million and $2 million in 2020 and 2019, respectively, and equity method income of $4 million and $10 million in 2020 and 2019, respectively.

Details of Operating Segment Revenue

Details of operating segment revenue for the three and nine-month periods ended September 30, 2020 and 2019 are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2020		2019		2020		2019
Risk and Insurance Services
Marsh	$	2,015	$	1,923	$	6,259	$	5,850
Guy Carpenter	276		283		1,546		1,353
Total Risk and Insurance Services	2,291		2,206		7,805		7,203
Consulting
Mercer	1,216		1,280		3,616		3,695
Oliver Wyman Group	480		505		1,458		1,563
Total Consulting	1,696		1,785		5,074		5,258
Total Operating Segments	3,987		3,991		12,879		12,461
Corporate/Eliminations	(19)		(23)		(71)		(73)
Total	$	3,968	$	3,968	$	12,808	$	12,388

XML

Nature of Operations (Details) numberOfColleague in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) numberOfColleague country	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) numberOfColleague country	Sep. 30, 2019 USD ($)
Nature of Operations [Line Items]
Entity number of colleagues | numberOfColleague	76		76
Revenue	$ 3,968	$ 3,968	$ 12,808	$ 12,388
Number of countries in which entity operates (more than) | country	130		130
Marsh & McLennan Companies, Inc.
Nature of Operations [Line Items]
Revenue			$ 17,000

XML

Principles of Consolidation And Other Matters (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Operating funds related to regulatory requirements or as collateral under captive insurance arrangements	$ 247,000,000		$ 247,000,000		$ 197,000,000
Equity method investments lag period			3 months
Gain (loss) on investment income, net	(14,000,000)	$ 7,000,000	$ (47,000,000)	$ 20,000,000
Gain (loss) on equity securities	$ (16,000,000)	$ 4,000,000	$ (19,000,000)	$ 10,000,000
Effective tax rate (as a percent)	30.30%	26.00%	26.00%	27.80%
Unrecognized tax benefits	$ 102,000,000		$ 102,000,000		$ 86,000,000
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	22,000,000		22,000,000
Private Equity Funds
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Equity method income	$ 2,000,000	$ 3,000,000	(6,000,000)	$ 10,000,000
Alexander Forbes Group Holdings Limited
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Gain (loss) on investment income, net			$ (23,000,000)

XML

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 3,968	$ 3,968	$ 12,808	$ 12,388
Risk and Insurance Services Segment
Disaggregation of Revenue [Line Items]
Revenue	2,291	2,206	7,805	7,203
Fiduciary interest income	8	31	40	80
Risk and Insurance Services Segment | Total International
Disaggregation of Revenue [Line Items]
Revenue	883	888	2,960	2,823
Risk and Insurance Services Segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue	536	536	1,887	1,821
Risk and Insurance Services Segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	254	242	790	698
Risk and Insurance Services Segment | Latin America
Disaggregation of Revenue [Line Items]
Revenue	93	110	283	304
Risk and Insurance Services Segment | U.S./Canada
Disaggregation of Revenue [Line Items]
Revenue	1,126	1,014	3,271	2,972
Consulting Segment
Disaggregation of Revenue [Line Items]
Revenue	1,696	1,785	5,074	5,258
Consulting Segment | Wealth
Disaggregation of Revenue [Line Items]
Revenue	566	592	1,719	1,748
Consulting Segment | Health
Disaggregation of Revenue [Line Items]
Revenue	430	441	1,348	1,341
Consulting Segment | Career
Disaggregation of Revenue [Line Items]
Revenue	220	247	549	606
Marsh & Guy Carpenter | Risk and Insurance Services Segment
Disaggregation of Revenue [Line Items]
Revenue	2,283	2,175	7,765	7,123
Marsh Insurance Group | Risk and Insurance Services Segment
Disaggregation of Revenue [Line Items]
Revenue	2,009	1,902	6,231	5,795
Guy Carpenter Reinsurance Group | Risk and Insurance Services Segment
Disaggregation of Revenue [Line Items]
Revenue	274	273	1,534	1,328
Mercer Consulting Group | Consulting Segment
Disaggregation of Revenue [Line Items]
Revenue	1,216	1,280	3,616	3,695
Oliver Wyman Group Consulting Group | Consulting Segment
Disaggregation of Revenue [Line Items]
Revenue	$ 480	$ 505	$ 1,458	$ 1,563

XML

Revenue - Contract Assets and Contract Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract Assets	$ 257	$ 207
Contract Liabilities	$ 648	$ 593

XML

Revenue - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue recognized that was included in the contract liability balance at the beginning of the period	$ 420	$ 378
Performance obligation satisfied in previous period	84	$ 67
Marsh Insurance Group
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	46
Mercer Consulting Group
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	181
Oliver Wyman Group Consulting Group
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	$ 2

XML

Revenue - Estimated Revenue Expected to Be Recognized Related to Performance Obligations (Details) $ in Millions	Sep. 30, 2020 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 123
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 63
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)	1 year
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	$ 27
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	$ 13
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	$ 3
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)

XML

Fiduciary Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Fiduciary Assets and Liabilities [Line Items]
Net uncollected premiums and claims receivable and payable	$ 11,400		$ 11,400		$ 8,900
Risk and Insurance Services Segment
Fiduciary Assets and Liabilities [Line Items]
Interest on fiduciary funds	8	$ 31	40	$ 80
Operating Segments | Risk and Insurance Services Segment
Fiduciary Assets and Liabilities [Line Items]
Interest on fiduciary funds	8	31	40	80
Operating Segments | Consulting Segment
Fiduciary Assets and Liabilities [Line Items]
Interest on fiduciary funds	$ 1	$ 1	$ 1	$ 2

XML

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income before non-controlling interests	$ 320	$ 306	$ 1,667	$ 1,377
Less: Net income attributable to non-controlling interests	4	3	25	26
Net income attributable to the Company	$ 316	$ 303	$ 1,642	$ 1,351
Basic weighted average common shares outstanding (in shares)	507	506	506	506
Dilutive effect of potentially issuable common shares (in shares)	5	5	5	5
Diluted weighted average common shares outstanding (in shares)	512	511	511	511
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 114.64	$ 99.97	$ 107.64	$ 94.75

XML

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, 2020	Sep. 30, 2019
Supplemental Cash Flow Information [Abstract]
Assets acquired, excluding cash	$ 795	$ 8,619
Liabilities assumed	(73)	(2,758)
Non-controlling interests assumed	0	(295)
Contingent/deferred purchase consideration	(163)	(66)
Net cash outflow for current year acquisitions	559	5,500
Interest paid	437	387
Income taxes paid, net of refunds	$ 414	$ 442

XML

Supplemental Disclosures to the Consolidated Statements of Cash Flows (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Supplemental Cash Flow Information [Abstract]
Deferred and contingent consideration from prior years acquisition	$ 125	$ 60
Deferred purchase consideration from prior years' acquisitions	60	37
Contingent consideration from prior year's acquisitions	65	23
Expense for adjustments related to contingent consideration liabilities	22	26
Payment of contingent consideration	36	35
Non-cash issuance of common stock	217	164
Stock-based compensation expense, equity awards	$ 219	$ 184

XML

Other Comprehensive Income (Loss) (Schedule of Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 7,943
Other comprehensive (loss) income before reclassifications	$ 403	$ (419)	(184)	$ (340)
Amounts reclassified from accumulated other comprehensive income	31	15	91	56
Other comprehensive income (loss), net of tax	434	(404)	(93)	(284)
Balance, end of period	8,752	7,797	8,752	7,797
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(5,582)	(4,527)	(5,055)	(4,647)
Other comprehensive income (loss), net of tax	434	(404)	(93)	(284)
Balance, end of period	(5,148)	(4,931)	(5,148)	(4,931)
Pension/Post-Retirement Plans Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(3,346)	(2,942)	(3,512)	(2,953)
Other comprehensive (loss) income before reclassifications	(94)	56	12	26
Amounts reclassified from accumulated other comprehensive income	31	15	91	56
Other comprehensive income (loss), net of tax	(63)	71	103	82
Balance, end of period	(3,409)	(2,871)	(3,409)	(2,871)
Foreign Currency Translation Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,236)	(1,585)	(1,543)	(1,694)
Other comprehensive (loss) income before reclassifications	497	(475)	(196)	(366)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Other comprehensive income (loss), net of tax	497	(475)	(196)	(366)
Balance, end of period	$ (1,739)	$ (2,060)	$ (1,739)	$ (2,060)

XML

Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Foreign currency translation adjustments, Pre-Tax	$ 500	$ (475)	$ (200)	$ (366)
Foreign currency translation adjustments, Tax	3	0	(4)	0
Foreign currency translation adjustments, Net of Tax	497	(475)	(196)	(366)
Pension/post-retirement plans:
Prior services credits, Pre-Tax	0	(1)	(1)	(2)
Prior service credits, Tax	0	(1)	0	(1)
Prior service credits, Net of Tax	0	0	(1)	(1)
Net actuarial loss, Pre-Tax	40	25	120	77
Net actuarial loss, Tax	9	6	28	18
Net actuarial loss, Net of Tax	31	19	92	59
Effect of remeasurement, Pre-tax	0	(8)	0	(9)
Effect of remeasurement, Tax	0	(2)	0	(2)
Effect of remeasurement, Net of Tax	0	(6)	0	(7)
Effect of settlement, Pre-tax	0	2	0	6
Effect of settlement, Tax	0	0	0	1
Effect of settlement, Net of Tax	0	2	0	5
Subtotal, Pre-Tax	40	18	119	72
Subtotal, Tax	9	3	28	16
Subtotal, Net of Tax	31	15	91	56
Foreign currency translation adjustment, Pre-Tax	(113)	64	17	30
Foreign currency translation adjustment, Tax	(19)	8	5	4
Foreign currency translation adjustment, Net of Tax	(94)	56	12	26
Pension/post-retirement plans gains, Pre-Tax	(73)	82	136	102
Pension/post-retirement plans gains, Tax	(10)	11	33	20
Pension/post-retirement plans gains, Net of Tax	(63)	71	103	82
Other comprehensive income (loss), before tax	427	(393)	(64)	(264)
Other comprehensive (loss) income, Tax	(7)	11	29	20
Other comprehensive income (loss), net of tax	$ 434	$ (404)	$ (93)	$ (284)

XML

Acquisitions and Dispositions (Narrative) (Details) £ / shares in Units, shares in Millions, $ in Millions, £ in Billions					1 Months Ended		3 Months Ended		9 Months Ended			12 Months Ended
	Jun. 01, 2019 USD ($)	Apr. 01, 2019 USD ($) $ / £	Apr. 01, 2019 GBP (£) £ / shares $ / £	Sep. 20, 2018 GBP (£)	May 31, 2020 shares	Feb. 29, 2020 shares	Sep. 30, 2020 USD ($) shares	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) acquisition shares	Dec. 31, 2019 USD ($) shares	Sep. 30, 2019 USD ($)	Dec. 31, 2019 acquisition shares	Jan. 01, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Total consideration									$ 742		$ 5,925
Cash paid									579		5,859
Estimated fair value of deferred/contingent consideration									163		66
Deferred purchase consideration from prior years' acquisitions									60		37
Contingent consideration from prior year's acquisitions									65		23
Disposal group, consideration							$ 0
Assumption of debt									73		2,758
Payments to acquire outstanding minority interests of subsidiaries									0	$ 75	91
Prior Fiscal Periods Acquisitions
Business Acquisition [Line Items]
Deferred purchase consideration from prior years' acquisitions									60		37
Contingent consideration from prior year's acquisitions									101		58
Jardine Lloyd Thompson Group plc
Business Acquisition [Line Items]
Total consideration | £				£ 5.2
Business acquisition, share price (in gbp per share) | £ / shares			£ 19.15
Equity interests issued and issuable		$ 5,600	£ 4.3
Business combination, exchange rate | $ / £		1.31	1.31
Assumption of debt		$ 1,000
Current Fiscal Period Acquisitions
Business Acquisition [Line Items]
Total consideration									742
Cash paid									579
Estimated fair value of deferred/contingent consideration									163
Revenue related to acquisitions							52	$ 352	115		848
Operating (loss) income related to acquisitions							$ (8)	(69)	$ 3		$ (51)
Risk and Insurance Services Segment
Business Acquisition [Line Items]
Number of acquisitions made (in acquisitions) | acquisition									4			5
Minimum
Business Acquisition [Line Items]
Revenue target period (in years)									2 years
Maximum
Business Acquisition [Line Items]
Revenue target period (in years)									4 years
Alexander Forbes Group Holdings Limited
Business Acquisition [Line Items]
Equity method investment, shares owned | shares										443		443
Number of shares sold (shares) | shares					193	49
Marsh India
Business Acquisition [Line Items]
Percentage of ownership in equity investment													49.00%	26.00%
Certain Businesses Primarily in the U.S., U.K. and Canada
Business Acquisition [Line Items]
Disposal group, consideration									$ 93
Alexander Forbes Group Holdings Limited
Business Acquisition [Line Items]
Investment owned, shares | shares							201		201
Specialty Business and Large Market Health and Defined Benefit Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Disposal group, consideration								$ 60
JLT’s Global Aerospace Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Disposal group, consideration	$ 165
Contingent consideration receivable	$ 65

XML

Acquisitions and Dispositions (Allocation Of Acquisition Costs) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Cash	$ 579	$ 5,859
Estimated fair value of deferred/contingent consideration	163	66
Total consideration	742	5,925
Allocation of purchase price:
Goodwill	15,034	$ 14,286	$ 14,671	$ 9,599
Current Fiscal Period Acquisitions
Business Acquisition [Line Items]
Cash	579
Estimated fair value of deferred/contingent consideration	163
Total consideration	742
Allocation of purchase price:
Cash and cash equivalents	20
Accounts receivable, net	27
Fixed assets, net	15
Other intangible assets	280
Goodwill	462
Other assets	11
Total assets acquired	815
Current liabilities	22
Other liabilities	51
Total liabilities assumed	73
Net assets acquired	$ 742

XML

Acquisitions and Dispositions (Acquired Finite-Lived Intangible Assets) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 280
Client relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 257
Finite-lived intangible assets, remaining amortization period	13 years 3 months 18 days
Other
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 23
Finite-lived intangible assets, remaining amortization period	4 years 6 months

XML

Acquisitions and Dispositions (Pro-Forma Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Combinations [Abstract]
Revenue	$ 3,968	$ 4,016	$ 12,859	$ 12,979
Net income attributable to the Company	$ 316	$ 307	$ 1,644	$ 1,453
Basic net income per share attributable to the Company (in dollars per share)	$ 0.62	$ 0.61	$ 3.25	$ 2.87
Diluted net income per share attributable to the Company (in dollars per share)	$ 0.62	$ 0.60	$ 3.22	$ 2.84

XML

Goodwill and Other Intangibles (Changes in the Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Goodwill [Roll Forward]
Balance as of January 1,	$ 14,671	$ 9,599
Goodwill acquired	462	4,962
Other adjustments	(99)	(275)
Balance at September 30,	$ 15,034	$ 14,286

XML

Goodwill and Other Intangibles (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Goodwill acquired	$ 462	$ 4,962
Goodwill	15,034	14,286	$ 14,671	$ 9,599
Aggregate amortization expense	265	$ 235
Risk and Insurance Services Segment
Segment Reporting Information [Line Items]
Goodwill acquired	462
Goodwill, expected tax deductible amount	140
Goodwill	11,000
Consulting Segment
Segment Reporting Information [Line Items]
Goodwill	$ 4,000

XML

Goodwill and Other Intangibles (Amortized Intangible Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 4,025	$ 3,874
Accumulated Amortization	1,314	1,100
Net Carrying Amount	2,711	2,774
Client relationships
Finite-Lived Intangible Assets [Line Items]
Gross Cost	3,644	3,494
Accumulated Amortization	1,095	897
Net Carrying Amount	2,549	2,597
Other
Finite-Lived Intangible Assets [Line Items]
Gross Cost	381	380
Accumulated Amortization	219	203
Net Carrying Amount	$ 162	$ 177

XML

Goodwill And Other Intangibles (Estimated Future Aggregate Amortization Expense) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
2020 (excludes amortization through September 30, 2020)	$ 92
2021	351
2022	323
2023	299
2024	286
Subsequent years	1,360
Net Carrying Amount	$ 2,711	$ 2,774

XML

Fair Value Measurements (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended				3 Months Ended				9 Months Ended
	May 31, 2020	Feb. 29, 2020	Apr. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase in fair value of contingent consideration due to 5% increase in projections									$ 9
Decrease in fair value of contingent consideration due to 5% decrease in projections									21
Net charge (credit) for adjustments related to acquisition related accounts									8
Carrying value of investment					$ 265				265		$ 434
Equity securities					58				58		19
Gain (loss) on equity securities					(16)	$ 4			(19)	$ 10
Equity investments without readily determinable market value					43				$ 43		67
Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Revenue target period (in years)									2 years
Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Revenue target period (in years)									4 years
Private Insurance and Consulting
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of investment					169				$ 169		183
Private Equity Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of investment					96				96		$ 107
Equity method income (loss)					2	$ 3			(6)	$ 10
Alexander Forbes Group Holdings Limited
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity method investment, shares owned											443
Number of shares sold (shares)	193	49
Investments, fair value					$ 41				41
BenefitFocus
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Proceeds from sale of other investments			$ 17	$ 132				$ 115
Payscale
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Proceeds from sale of other investments							$ 47
Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Change in contingent purchase consideration									14
Increase in fair value of contingent consideration due to 5% increase in projections									6
Decrease in fair value of contingent consideration due to 5% decrease in projections									$ 6
Money Market Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Share price (per share amount)					$ 1.00				$ 1.00
Alexander Forbes Group Holdings Limited
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment owned, shares					201				201

XML

Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Financial instruments owned:
Exchange traded equity securities	$ 58	$ 19
Fair Value, Measurements, Recurring
Financial instruments owned:
Total assets measured at fair value	1,148	317
Fiduciary Assets:
Fiduciary assets	201	400
Liabilities:
Total liabilities measured at fair value	230	225
Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial instruments owned:
Total assets measured at fair value	1,073	225
Fiduciary Assets:
Fiduciary assets	201	400
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	8	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	67	84
Fiduciary Assets:
Fiduciary assets	0	0
Liabilities:
Total liabilities measured at fair value	230	225
US Treasury Bills | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	25	40
US Treasury Bills | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	25	40
US Treasury Bills | Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	0	0
US 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	176	360
Money Market Funds | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fiduciary Assets:
Fiduciary assets	176	360
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	45	4
Mutual funds	167	166
Other equity investments	8	8
Other Assets | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial instruments owned:
Exchange traded equity securities	45	4
Mutual funds	167	166
Other equity investments	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 investments	8	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 investments	0	0
Cash and Cash Equivalents | Fair Value, Measurements, Recurring
Financial instruments owned:
Money market funds	861	55
Cash and Cash Equivalents | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial instruments owned:
Money market funds	861	55
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 asset	67	84
Other Receivables | Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial instruments owned:
Contingent purchase consideration asset	0	0
Other Receivables | Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Financial instruments owned:
Contingent purchase consideration asset	0	0
Other Receivables | Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial instruments owned:
Contingent purchase consideration asset	67	84
Accounts Payable and Accrued Liabilities and Other Liabilities | Fair Value, Measurements, Recurring
Liabilities:
Contingent purchase consideration liability	230	225
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	$ 230	$ 225

XML

Fair Value Measurements (Changes In Fair Value Of Level 3 Liabilities Representing Acquisition Related Contingent Consideration) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revaluation Impact			$ (22)	$ (26)
Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 233	$ 196	225	508
Net Additions	0		96	33
Net Additions		(7)
Payments	(23)	(13)	(101)	(58)
Revaluation Impact	18	6	8	26
Other	2	3	2	1
Balance at September 30,	230	185	230	185
Foreign Exchange Forward | Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value of the FX contract	$ 0	$ 0	$ 0	$ (325)

XML

Derivatives - Narrative (Details) £ in Billions		1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 20, 2018 GBP (£)	Jan. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 EUR (€)	Mar. 31, 2019 EUR (€)	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Net investment hedge, threshold percentage of the equity balance				80.00%
Increase in net investment hedges				$ 60,000,000
Total consideration				$ 742,000,000	$ 5,925,000,000
Net Investment Hedging
Derivative [Line Items]
Derivative, notional amount | €						€ 1,100,000,000
Senior Notes
Derivative [Line Items]
Debt instrument face amount		$ 5,000,000,000
Foreign Exchange Forward
Derivative [Line Items]
Unrealized gain					31,000,000
Treasury Lock
Derivative [Line Items]
Payments for derivative settlement		$ 122,000,000	$ 6,000,000
Jardine Lloyd Thompson Group plc
Derivative [Line Items]
Total consideration | £	£ 5.2
Jardine Lloyd Thompson Group plc | Senior Notes
Derivative [Line Items]
Debt instrument face amount | €							€ 1,100,000,000
Payments for derivative settlement					7,300,000
Jardine Lloyd Thompson Group plc | Foreign Exchange Forward
Derivative [Line Items]
Derivative, loss on derivative					$ 26,000,000
Jardine Lloyd Thompson Group plc | Treasury Lock
Derivative [Line Items]
Derivative hedges, assets								$ 2,000,000,000

XML

Leases - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Lessee, operating lease, lease not yet commenced, amount	$ 16
Lessee, operating lease, lease not yet commenced, term (years)	12 months
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
Office Space
Lessee, Lease, Description [Line Items]
Lease obligations, percent	99.00%

XML

Leases - Lease Cost and Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 99	$ 94	$ 288	$ 276
Short-term lease cost	1	4	3	7
Variable lease cost	28	37	92	113
Sublease income	(5)	(4)	(15)	(12)
Net lease cost	$ 123	$ 131	368	384
Operating cash outflows from operating leases			306	288
Right of use assets obtained in exchange for new operating lease liabilities			$ 162	$ 112
Real Estate Lease
Lessee, Lease, Description [Line Items]
Weighted-average remaining lease term	8 years 5 months 8 days	8 years 10 months 9 days	8 years 5 months 8 days	8 years 10 months 9 days
Weighted-average discount rate	3.02%	3.09%	3.02%	3.09%

XML

Leases - Future Minimum Payments for Operating Leases (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Remainder of 2020	$ 112
2021	390
2022	363
2023	315
2024	270
2025	242
Subsequent years	855
Total future lease payments	2,547
Less: Imputed interest	(310)
Total	2,237
Current lease liabilities	335	$ 342
Long-term lease liabilities	$ 1,902	$ 1,926

XML

Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions		9 Months Ended
	Dec. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Pension, post-retirement and post-employment benefits	$ 2,336	$ 2,163
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Contributions by employer		81
Estimated future employer contributions in current fiscal year		63
Jardine Lloyd Thompson Group plc
Defined Benefit Plan Disclosure [Line Items]
Pension, post-retirement and post-employment benefits	255
Pension, post-retirement and post-employment liabilities	1,003
Pension, post-retirement and post-employment plan assets	$ 748
United States
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost recognized		110	$ 106
United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost recognized		$ 94	$ 74
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		64.00%
Actual asset allocation percentage of equity		63.00%
Equity Funds | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation, percentage		33.00%
Actual asset allocation percentage of equity		33.00%
Fixed Income Funds | United States
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation, percentage		36.00%
Actual asset allocation percentage of equity		37.00%
Fixed Income Funds | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation, percentage		67.00%
Actual asset allocation percentage of equity		67.00%

XML

Retirement Benefits (Schedule Of Defined Benefit Plan Net Periodic Benefit Cost Combined U.S. and Significant Non-U.S. Plans) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10	$ 10	$ 27	$ 28
Interest cost	112	120	322	360
Expected return on plan assets	(212)	(214)	(629)	(644)
Amortization of prior service (credit) cost			0	0
Recognized actuarial loss (credit)	40	25	120	77
Net periodic benefit credit	(50)	(59)	(160)	(179)
Settlement loss			0	4
Total (credit) cost	(50)	(59)	(160)	(175)
Pension Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	53	61	160	181
Expected return on plan assets	(86)	(86)	(259)	(257)
Recognized actuarial loss (credit)	18	11	54	33
Net periodic benefit credit	(15)	(14)	(45)	(43)
Pension Benefits | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	10	10	27	28
Interest cost	59	59	162	179
Expected return on plan assets	(126)	(128)	(370)	(387)
Amortization of prior service (credit) cost			0	0
Recognized actuarial loss (credit)	22	14	66	44
Net periodic benefit credit	(35)	(45)	(115)	(136)
Settlement loss			0	4
Total (credit) cost			(115)	(132)
Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	1	1	2	2
Expected return on plan assets	0	0	0	0
Amortization of prior service (credit) cost			(1)	(1)
Recognized actuarial loss (credit)	(1)	(1)	(1)	(1)
Net periodic benefit credit	0	0	0	0
Settlement loss			0	0
Total (credit) cost	0	0	0	0
Post-retirement Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1	1	1
Expected return on plan assets	0	0	0	0
Recognized actuarial loss (credit)	(1)	(1)	(1)	(1)
Net periodic benefit credit	0	0	0	0
Post-retirement Benefits | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	0	0	1	1
Expected return on plan assets	0	0	0	0
Amortization of prior service (credit) cost			(1)	(1)
Recognized actuarial loss (credit)	0	0	0	0
Net periodic benefit credit	$ 0	$ 0	0	0
Settlement loss			0	0
Total (credit) cost			$ 0	$ 0

XML

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense (Operating income)	$ (540)	$ (467)	$ (2,495)	$ (2,085)
Other net benefit (credits) cost	(60)	(69)	(187)	(203)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense (Operating income)	10	10	27	28
Other net benefit (credits) cost	(60)	(69)	(187)	(203)
Total (credit) cost	(50)	(59)	(160)	(175)
Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Compensation and benefits expense (Operating income)	0	0	0	0
Other net benefit (credits) cost	0	0	0	0
Total (credit) cost	$ 0	$ 0	$ 0	$ 0

XML

Retirement Benefits (Schedule Of Defined Benefit Plan Weighted Average Assumption Used In Calculating Net Periodic Benefit Cost) (Details)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Pension Benefits
Weighted average assumptions:
Expected return on plan assets	5.31%	5.74%
Discount rate	2.57%	3.48%
Rate of compensation increase	1.76%	1.74%
Post-retirement Benefits
Weighted average assumptions:
Expected return on plan assets	0.00%	0.00%
Discount rate	2.72%	3.65%
Rate of compensation increase	0.00%	0.00%

XML

Debt (Schedule Of Outstanding Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Current portion of long-term debt	$ 1,216	$ 1,215
Short-term debt	1,216	1,215
Long-term debt	12,748	11,956
Long-term debt, net	11,532	10,741
2.35% Senior Debt Obligations Due 2020
Debt Instrument [Line Items]
Long-term debt	$ 0	500
Interest rate	2.35%
3.50% Senior Debt Obligations Due 2020
Debt Instrument [Line Items]
Long-term debt	$ 700	698
Interest rate	3.50%
4.80% Senior Debt Obligations Due 2021
Debt Instrument [Line Items]
Long-term debt	$ 500	499
Interest rate	4.80%
Floating Rate Senior Debt Obligations Due 2021
Debt Instrument [Line Items]
Long-term debt	$ 299	298
2.75% Senior Debt Obligations Due 2022
Debt Instrument [Line Items]
Long-term debt	$ 499	498
Interest rate	2.75%
3.30% Senior Debt Obligations Due 2023
Debt Instrument [Line Items]
Long-term debt	$ 349	349
Interest rate	3.30%
4.05% Senior Debt Obligations Due 2023
Debt Instrument [Line Items]
Long-term debt	$ 249	249
Interest rate	4.05%
3.50% Senior Debt Obligations Due 2024
Debt Instrument [Line Items]
Long-term debt	$ 598	597
Interest rate	3.50%
3.875% Senior Debt Obligations Due 2024
Debt Instrument [Line Items]
Long-term debt	$ 995	994
Interest rate	3.875%
3.50% Senior Debt Obligations Due 2025
Debt Instrument [Line Items]
Long-term debt	$ 497	497
Interest rate	3.50%
1.349% Senior Debt Obligations Due 2026
Debt Instrument [Line Items]
Long-term debt	$ 641	609
Interest rate	1.349%
3.75% Senior Debt Obligations Due 2026
Debt Instrument [Line Items]
Long-term debt	$ 597	597
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	$ 635	607
Interest rate	1.979%
2.250% Senior Debt Obligations Due 2030
Debt Instrument [Line Items]
Long-term debt	$ 737	0
Interest rate	2.25%
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	494
Interest rate	4.75%
4.35% Senior Debt Obligation Due 2047
Debt Instrument [Line Items]
Long-term debt	$ 493	492
Interest rate	4.35%
4.20% Senior Debt Obligations Due 2048
Debt Instrument [Line Items]
Long-term debt	$ 592	592
Interest rate	4.20%
4.90% Senior Debt Obligations Due 2049
Debt Instrument [Line Items]
Long-term debt	$ 1,237	1,237
Interest rate	4.90%
5.70% Mortgage Due 2035
Debt Instrument [Line Items]
Long-term debt	$ 334	345
Interest rate	5.70%
$500 Million Two-Year Term Loan Facility
Debt Instrument [Line Items]
Long-term debt	$ 500	0
Other
Debt Instrument [Line Items]
Long-term debt	$ 4	$ 7

XML

Debt (Narrative) (Details)	1 Months Ended						3 Months Ended		9 Months Ended
	Apr. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jan. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Apr. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	May 31, 2020 USD ($)	Apr. 01, 2019 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2019 EUR (€)	Jan. 31, 2019 USD ($)
Debt Instrument [Line Items]
Commercial paper outstanding							$ 0		$ 0
Payments for early extinguishment of debt									0	$ 585,000,000
April 2020 New Credit Facility
Debt Instrument [Line Items]
Debt facilities, maximum borrowing capacity	$ 1,000,000,000						$ 0		$ 0
Term of debt	1 year
2.250% Senior Debt Obligations Due 2030
Debt Instrument [Line Items]
Interest rate							2.25%		2.25%
1.349% Senior Debt Obligations Due 2026
Debt Instrument [Line Items]
Interest rate							1.349%		1.349%
1.979% Senior Debt Obligations Due 2030
Debt Instrument [Line Items]
Interest rate							1.979%		1.979%
Commercial Paper
Debt Instrument [Line Items]
Short-term debt							$ 1,500,000,000		$ 1,500,000,000
Jardine Lloyd Thompson Group plc
Debt Instrument [Line Items]
Repayments of debt					$ 553,000,000	$ 450,000,000
Debt assumed in acquisition												$ 1,000,000,000
Payments for early extinguishment of debt								$ 32,000,000
Revolving Credit Facility | Amended Revolving Credit Facility
Debt Instrument [Line Items]
Debt facilities, maximum borrowing capacity							1,800,000,000		$ 1,800,000,000
Term of debt									5 years
Long-term line of credit		$ 1,000,000,000					0		$ 0
Term Loan Facility | $500 Million One-Year Term Loan Facility
Debt Instrument [Line Items]
Debt facilities, maximum borrowing capacity			$ 500,000,000
Term of debt			1 year
Long-term line of credit							0		0
Repayments of debt							500,000,000
Term Loan Facility | $500 Million Two-Year Term Loan Facility
Debt Instrument [Line Items]
Debt facilities, maximum borrowing capacity			$ 500,000,000
Term of debt			2 years
Long-term line of credit							500,000,000		500,000,000
Senior Notes
Debt Instrument [Line Items]
Repayments of debt		$ 500,000,000		$ 300,000,000
Debt instrument face amount															$ 5,000,000,000
Senior Notes | 2.250% Senior Debt Obligations Due 2030
Debt Instrument [Line Items]
Debt instrument face amount											$ 750,000,000
Interest rate											2.25%
Senior Notes | 1.349% Senior Debt Obligations Due 2026
Debt Instrument [Line Items]
Debt instrument face amount | €														€ 550,000,000
Interest rate													1.349%	1.349%
Senior Notes | 1.979% Senior Debt Obligations Due 2030
Debt Instrument [Line Items]
Debt instrument face amount | €														€ 550,000,000
Interest rate													1.979%	1.979%
Senior Notes | Senior Debt Obligations 4.375% Due 2029
Debt Instrument [Line Items]
Debt instrument face amount							$ 1,500,000,000		$ 1,500,000,000				$ 250,000,000		1,250,000,000
Interest rate							4.375%		4.375%
Senior Notes | Senior Debt Obligations 3.50% Due 2020
Debt Instrument [Line Items]
Debt instrument face amount															$ 700,000,000
Interest rate															3.50%
Senior Notes | Senior Debt Obligations 3.875% Due 2024
Debt Instrument [Line Items]
Debt instrument face amount															$ 1,000,000,000
Interest rate															3.875%
Senior Notes | Senior Debt Obligations 4.75% Due 2039
Debt Instrument [Line Items]
Debt instrument face amount															$ 500,000,000
Interest rate															4.75%
Senior Notes | Senior Debt Obligations 4.90% Due 2049
Debt Instrument [Line Items]
Debt instrument face amount															$ 1,250,000,000
Interest rate															4.90%
Senior Notes | Floating Rate Senior Notes Due 2021
Debt Instrument [Line Items]
Debt instrument face amount															$ 300,000,000
Senior Notes | Jardine Lloyd Thompson Group plc
Debt Instrument [Line Items]
Debt instrument face amount | €														€ 1,100,000,000

XML

Debt (Estimated Fair Value of Significant Financial Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term debt	$ 1,216	$ 1,215
Long-term debt	11,532	10,741
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term debt	1,234	1,229
Long-term debt	$ 13,480	$ 11,953

XML

Restructuring Costs - Narrative (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Amounts accrued	$ 43	$ 112
ROU asset impairment loss	3
Severance and consulting costs | Marsh Insurance Group
Restructuring Cost and Reserve [Line Items]
Amounts accrued	2
Severance and consulting costs | Mercer Consulting Group
Restructuring Cost and Reserve [Line Items]
Amounts accrued	17
Cost To Modernize IT Systems And Security Protocols, Consulting Costs, And Adjustments To Restructuring Liabilities | Corporate
Restructuring Cost and Reserve [Line Items]
Amounts accrued	24
Jardine Lloyd Thompson Group plc
Restructuring Cost and Reserve [Line Items]
Amounts accrued	181	335
ROU asset impairment loss	9
Jardine Lloyd Thompson Group plc | Acquisition related
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	700
Restructuring and related cost, cost incurred to date	181	$ 335
Amounts accrued	181
Jardine Lloyd Thompson Group plc | Acquisition related | Corporate
Restructuring Cost and Reserve [Line Items]
Amounts accrued	25
Jardine Lloyd Thompson Group plc | Acquisition related | Risk and Insurance Services Segment
Restructuring Cost and Reserve [Line Items]
Amounts accrued	125
Jardine Lloyd Thompson Group plc | Acquisition related | Consulting Segment
Restructuring Cost and Reserve [Line Items]
Amounts accrued	$ 31

XML

Restructuring Costs (Restructuring Activities) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Liability at beginning of period	$ 102	$ 112
Amounts Accrued	43	112
Cash Paid	(85)	(112)
Other	(2)	(10)
Liability at end of period	58	102
Severance
Restructuring Reserve [Roll Forward]
Liability at beginning of period	51	73
Amounts Accrued	15	73
Cash Paid	(51)	(91)
Other	0	(4)
Liability at end of period	15	51
Future rent under non-cancelable leases and other costs
Restructuring Reserve [Roll Forward]
Liability at beginning of period	51	39
Amounts Accrued	28	39
Cash Paid	(34)	(21)
Other	(2)	(6)
Liability at end of period	43	51
Jardine Lloyd Thompson Group plc
Restructuring Reserve [Roll Forward]
Liability at beginning of period	47	0
Amounts Accrued	181	335
Cash Paid	(169)	(265)
Non-cash charges	(31)	(23)
Liability at end of period	28	47
Jardine Lloyd Thompson Group plc | Severance
Restructuring Reserve [Roll Forward]
Liability at beginning of period	42	0
Amounts Accrued	38	154
Cash Paid	(70)	(112)
Non-cash charges	0	0
Liability at end of period	10	42
Jardine Lloyd Thompson Group plc | Real estate related costs
Restructuring Reserve [Roll Forward]
Liability at beginning of period	5	0
Amounts Accrued	42	38
Cash Paid	(15)	(14)
Non-cash charges	(26)	(19)
Liability at end of period	6	5
Jardine Lloyd Thompson Group plc | Information Technology
Restructuring Reserve [Roll Forward]
Liability at beginning of period	0	0
Amounts Accrued	45	45
Cash Paid	(40)	(45)
Non-cash charges	(5)	0
Liability at end of period	0	0
Jardine Lloyd Thompson Group plc | Consulting and other outside services
Restructuring Reserve [Roll Forward]
Liability at beginning of period	0	0
Amounts Accrued	56	98
Cash Paid	(44)	(94)
Non-cash charges	0	(4)
Liability at end of period	$ 12	$ 0

XML

Common Stock (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Nov. 30, 2019
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased (in shares)		3,100,000
Payments for repurchase of common stock	$ 0	$ 300,000,000
Stock-based compensation, shares issued during period (in shares)	3,400,000	4,200,000
Common Stock
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased (in shares)	0
Share repurchases program, authorized amount (up to)			$ 2,500,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 2,400,000,000

XML

Claims, Lawsuits And Other Contingencies (Details) numberOfCases in Thousands, $ in Millions	48 Months Ended
	Dec. 31, 2018 numberOfCases	Sep. 30, 2020 GBP (£)	Sep. 30, 2020 USD ($)	Feb. 28, 2019 GBP (£)	Feb. 28, 2019 USD ($)
Other Contingencies-Guarantees
Loss Contingencies [Line Items]
Amount reinsured by third party (up to) | £		£ 40,000,000
Jardine Lloyd Thompson Group plc
Loss Contingencies [Line Items]
Individual cases analyzed | numberOfCases	14
Loss contingency accrual		£ 62,000,000	$ 79	£ 59,000,000	$ 77

XML

Segment Information - Narrative (Details)	Mar. 31, 2019 country segment	Sep. 30, 2020 country
Segment Reporting Information [Line Items]
Number of countries in which entity operates		130
Jardine Lloyd Thompson Group plc
Segment Reporting Information [Line Items]
Number of business segments (segment) | segment	3
Number of countries in which entity operates	41

XML

Segment Information (Selected Information And Details For MMC's Operating Segments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 3,968	$ 3,968	$ 12,808	$ 12,388
Operating Income (Loss)	540	467	2,495	2,085
Risk and Insurance Services Segment
Segment Reporting Information [Line Items]
Revenue	2,291	2,206	7,805	7,203
Interest on fiduciary funds	8	31	40	80
Consulting Segment
Segment Reporting Information [Line Items]
Revenue	1,696	1,785	5,074	5,258
Operating Segments
Segment Reporting Information [Line Items]
Revenue	3,987	3,991	12,879	12,461
Operating Income (Loss)	611	535	2,698	2,342
Operating Segments | Risk and Insurance Services Segment
Segment Reporting Information [Line Items]
Revenue	2,291	2,206	7,805	7,203
Operating Income (Loss)	333	218	1,883	1,468
Interest on fiduciary funds	8	31	40	80
Equity method income	(6)	10	7	16
Operating Segments | Consulting Segment
Segment Reporting Information [Line Items]
Revenue	1,696	1,785	5,074	5,258
Operating Income (Loss)	278	317	815	874
Interest on fiduciary funds	1	1	1	2
Equity method income			4	10
Corporate/Eliminations
Segment Reporting Information [Line Items]
Revenue	(19)	(23)	(71)	(73)
Operating Income (Loss)	(71)	(68)	(203)	(257)
Intersegment Eliminations | Risk and Insurance Services Segment
Segment Reporting Information [Line Items]
Revenue		3	5	7
Intersegment Eliminations | Consulting Segment
Segment Reporting Information [Line Items]
Revenue	$ 19	$ 20	$ 66	$ 66

XML

Segment Information (Details of Operating Segment Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 3,968	$ 3,968	$ 12,808	$ 12,388
Risk and Insurance Services Segment
Segment Reporting Information [Line Items]
Revenue	2,291	2,206	7,805	7,203
Risk and Insurance Services Segment | Marsh Insurance Group
Segment Reporting Information [Line Items]
Revenue	2,009	1,902	6,231	5,795
Risk and Insurance Services Segment | Guy Carpenter Reinsurance Group
Segment Reporting Information [Line Items]
Revenue	274	273	1,534	1,328
Consulting Segment
Segment Reporting Information [Line Items]
Revenue	1,696	1,785	5,074	5,258
Consulting Segment | Mercer Consulting Group
Segment Reporting Information [Line Items]
Revenue	1,216	1,280	3,616	3,695
Consulting Segment | Oliver Wyman Group Consulting Group
Segment Reporting Information [Line Items]
Revenue	480	505	1,458	1,563
Operating Segments
Segment Reporting Information [Line Items]
Revenue	3,987	3,991	12,879	12,461
Operating Segments | Risk and Insurance Services Segment
Segment Reporting Information [Line Items]
Revenue	2,291	2,206	7,805	7,203
Operating Segments | Risk and Insurance Services Segment | Marsh Insurance Group
Segment Reporting Information [Line Items]
Revenue	2,015	1,923	6,259	5,850
Operating Segments | Risk and Insurance Services Segment | Guy Carpenter Reinsurance Group
Segment Reporting Information [Line Items]
Revenue	276	283	1,546	1,353
Operating Segments | Consulting Segment
Segment Reporting Information [Line Items]
Revenue	1,696	1,785	5,074	5,258
Operating Segments | Consulting Segment | Mercer Consulting Group
Segment Reporting Information [Line Items]
Revenue	1,216	1,280	3,616	3,695
Operating Segments | Consulting Segment | Oliver Wyman Group Consulting Group
Segment Reporting Information [Line Items]
Revenue	480	505	1,458	1,563
Corporate/Eliminations
Segment Reporting Information [Line Items]
Revenue	$ (19)	$ (23)	$ (71)	$ (73)

XML

New Accounting Guidance - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2020	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Operating lease, liability		$ 2,237
Operating lease, right-of-use asset	$ 1,921	$ 1,884
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability			$ 1,900
Operating lease, right-of-use asset			1,700
Other liabilities			$ 200