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