Revenue (Tables)

9 Months Ended

Sep. 30, 2021

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)	2021		2020		2021		2020
Marsh:
EMEA	$	600	$	536	$	2,233	$	1,887
Asia Pacific	281		254		902		790
Latin America	105		93		298		283
Total International	986		883		3,433		2,960
U.S./Canada	1,366		1,126		3,894		3,271
Total Marsh	2,352		2,009		7,327		6,231
Guy Carpenter	314		274		1,697		1,534
Subtotal	2,666		2,283		9,024		7,765
Fiduciary interest income	4		8		12		40
Total Risk and Insurance Services	$	2,670	$	2,291	$	9,036	$	7,805
Mercer:
Wealth	$	613	$	566	$	1,861	$	1,719
Health	449		430		1,398		1,348
Career	253		220		618		549
Total Mercer	1,315		1,216		3,877		3,616
Oliver Wyman Group	610		480		1,813		1,458
Total Consulting	$	1,925	$	1,696	$	5,690	$	5,074

Contract with Customer, Asset and Liability

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

(In millions)	September 30, 2021		December 31, 2020
Contract assets	$	307	$	236
Contract liabilities	$	738	$	676