Revenue (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

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

	Three Months Ended June 30,				Six Months Ended June 30,
(In millions)	2021		2020		2021		2020
Marsh:
EMEA	$	796	$	597	$	1,633	$	1,351
Asia Pacific	347		298		621		536
Latin America	103		99		193		190
Total International	1,246		994		2,447		2,077
U.S./Canada	1,404		1,167		2,528		2,145
Total Marsh	2,650		2,161		4,975		4,222
Guy Carpenter	488		433		1,383		1,260
Subtotal	3,138		2,594		6,358		5,482
Fiduciary interest income	3		9		8		32
Total Risk and Insurance Services	$	3,141	$	2,603	$	6,366	$	5,514
Mercer:
Wealth	$	625	$	561	$	1,248	$	1,153
Health	462		432		949		918
Career	187		156		365		329
Total Mercer	1,274		1,149		2,562		2,400
Oliver Wyman Group	618		467		1,203		978
Total Consulting	$	1,892	$	1,616	$	3,765	$	3,378

Contract with Customer, Asset and Liability

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

(In millions)	June 30, 2021		December 31, 2020
Contract assets	$	323	$	236
Contract liabilities	$	759	$	676