Revenue (Tables)

9 Months Ended

Sep. 30, 2022

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

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

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

Schedule of Contract with Customer, Asset and Liability

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

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