Revenue (Tables)

9 Months Ended

Sep. 30, 2019

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)	2019		2019
Marsh:
EMEA	$	536	$	1,821
Asia Pacific	242		698
Latin America	110		304
Total International	888		2,823
U.S./Canada	1,014		2,972
Total Marsh	1,902		5,795
Guy Carpenter	273		1,328
Subtotal	2,175		7,123
Fiduciary interest income	31		80
Total Risk and Insurance Services	$	2,206	$	7,203
Mercer:
Wealth	$	592	$	1,748
Health	441		1,341
Career	247		606
Total Mercer	1,280		3,695
Oliver Wyman	505		1,563
Total Consulting	$	1,785	$	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, 2019		January 1, 2019
Contract Assets	$	240	$	112
Contract Liabilities	$	611	$	545