Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

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

(In millions)	For the Years Ended December 31,
	2021		2020		2019
Marsh:
EMEA	$	2,946	$	2,575	$	2,482
Asia Pacific (a)	1,462		1,059		953
Latin America	453		424		460
Total International	4,861		4,058		3,895
U.S./Canada	5,342		4,537		4,119
Total Marsh	10,203		8,595		8,014
Guy Carpenter	1,867		1,696		1,480
Subtotal	12,070		10,291		9,494
Fiduciary interest income	15		46		105
Total Risk and Insurance Services	$	12,085	$	10,337	$	9,599
Mercer:
Wealth	$	2,509	$	2,348	$	2,369
Health	1,855		1,793		1,796
Career	890		787		856
Total Mercer	5,254		4,928		5,021
Oliver Wyman Group	2,535		2,048		2,122
Total Consulting	$	7,789	$	6,976	$	7,143

(a)Revenue in 2021 includes gain on the consolidation of Marsh India of $267 million.

Contract assets and liabilities

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

(In millions)	December 31, 2021		December 31, 2020		December 31, 2019
Contract assets	$	290	$	236	$	207
Contract liabilities	$	776	$	676	$	593