Revenue (Tables)

9 Months Ended

Sep. 30, 2023

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)	2023		2022		2023		2022
Marsh:
EMEA (a) (b)	$	692	$	615	$	2,482	$	2,264
Asia Pacific (a)	311		286		980		927
Latin America	134		118		386		340
Total International	1,137		1,019		3,848		3,531
U.S./Canada	1,563		1,451		4,634		4,263
Total Marsh	2,700		2,470		8,482		7,794
Guy Carpenter	359		328		2,006		1,849
Subtotal	3,059		2,798		10,488		9,643
Fiduciary interest income	131		40		330		57
Total Risk and Insurance Services	$	3,190	$	2,838	$	10,818	$	9,700
Mercer:
Wealth (c)	$	635	$	561	$	1,853	$	1,775
Health (d)	496		451		1,559		1,562
Career	294		272		731		679
Total Mercer	1,425		1,284		4,143		4,016
Oliver Wyman Group (b)	781		667		2,266		2,029
Total Consulting	$	2,206	$	1,951	$	6,409	$	6,045

(a) In the first quarter of 2023, the Company began reporting the Marsh India operations in EMEA. Prior year results for India have been reclassified from Asia Pacific to EMEA for comparative purposes.

(b) Revenue for the nine months ended September 30, 2022, includes the loss on deconsolidation of the Company's Russian businesses at Marsh and Oliver Wyman Group of $27 million and $12 million, respectively.

(c) Revenue for the nine months ended September 30, 2023, includes the loss on sale of an individual financial advisory business in Canada of $17 million.

(d) Revenue for the nine months ended September 30, 2022, includes a gain from the sale of the Mercer U.S. affinity business of $112 million.

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, 2023		December 31, 2022
Contract assets	$	398	$	335
Contract liabilities	$	876	$	837