Revenue from Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

	Years Ended December 31
	2022		2021		2020
Commercial Risk Solutions	$	6,715	$	6,635	$	5,861
Reinsurance Solutions	2,190		1,997		1,814
Health Solutions	2,224		2,154		2,067
Wealth Solutions	1,367		1,426		1,341
Elimination	(17)		(19)		(17)
Total revenue	$	12,479	$	12,193	$	11,066

Consolidated revenue from contracts with customers by geographic area, which is attributed on the basis of where the services are performed, is as follows (in millions):

	Years Ended December 31
	2022		2021		2020
U.S.	$	5,666	$	5,459	$	5,032
Americas other than U.S.	1,137		1,027		911
U.K.	1,660		1,681		1,579
Ireland	99		127		84
Europe, Middle East, & Africa other than U.K. and Ireland	2,443		2,565		2,236
Asia Pacific	1,474		1,334		1,224
Total revenue	$	12,479	$	12,193	$	11,066

Schedule of Capitalized Contract Cost

Changes in the net carrying amount of costs to fulfill contracts with customers are as follows (in millions):

	2022		2021
Balance at beginning of period	$	361	$	339
Additions	1,479		1,504
Amortization	(1,480)		(1,478)
Impairment	—		—
Foreign currency translation and other	(5)		(4)
Balance at end of period	$	355	$	361

Changes in the net carrying amount of costs to obtain contracts with customers are as follows (in millions):

	2022		2021
Balance at beginning of period	$	179	$	184
Additions	56		59
Amortization	(49)		(48)
Impairment	—		—
Foreign currency translation and other	(1)		(16)
Balance at end of period	$	185	$	179