Revenue (Tables)

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

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

For the Years Ended December 31,
(In millions)	2022		2021		2020
Marsh:
EMEA (a)	$	2,879	$	2,946	$	2,575
Asia Pacific (b)	1,333		1,462		1,059
Latin America	502		453		424
Total International	4,714		4,861		4,058
U.S./Canada	5,791		5,342		4,537
Total Marsh	10,505		10,203		8,595
Guy Carpenter	2,020		1,867		1,696
Subtotal	12,525		12,070		10,291
Fiduciary interest income	120		15		46
Total Risk and Insurance Services	$	12,645	$	12,085	$	10,337
Mercer:
Wealth	$	2,366	$	2,509	$	2,348
Health (c)	2,017		1,855		1,793
Career	962		890		787
Total Mercer	5,345		5,254		4,928
Oliver Wyman Group (a)	2,794		2,535		2,048
Total Consulting	$	8,139	$	7,789	$	6,976

(a) Revenue in 2022 includes the loss on deconsolidation of the Company's Russian businesses at Marsh and Oliver Wyman of $27 million and $12 million, respectively. Revenue in 2021 includes a net gain on the disposition of businesses of approximately $50 million.

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

(c) Revenue in 2022 includes a net gain from the sale of the Mercer U.S. affinity business of $112 million.

Schedule of contract assets and liabilities

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

December 31, (In millions)	2022		2021		2020
Contract assets	$	335	$	290	$	236
Contract liabilities	$	837	$	776	$	676

Details of the change in Contract Assets and Contract Liabilities for 2022 and 2021 are as follows:

For the Years Ended December 31,
(In millions)	2022		2021
Contract Assets
Balance beginning of the year	$	290	$	236
Additions	661		547
Transfers to accounts receivable (a)	(614)		(493)
Effect of foreign exchange rate changes	(2)		—
Balance at the end of the year	$	335	$	290
Contract Liabilities
Balance beginning of the year	$	776	$	676
Cash received for performance obligations not yet fulfilled	726		642
Revenue recognized	(640)		(539)
Effect of foreign exchange rate changes	(25)		(3)
Balance at the end of the year	$	837	$	776

(a) Amounts transferred to accounts receivable as the rights to bill and collect became unconditional.