Revenue from Contracts with Customers

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Revenue from Contracts with Customers

Disaggregation of Revenue

The following table summarizes revenue from contracts with customers by principal service line (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Commercial Risk Solutions	$	1,585	$	1,482	$	5,137	$	4,893
Reinsurance Solutions	465		396		2,149		1,909
Health Solutions	552		494		1,670		1,546
Wealth Solutions	352		326		1,054		1,014
Eliminations	(1)		(2)		(9)		(13)
Total revenue	$	2,953	$	2,696	$	10,001	$	9,349

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):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
United States	$	1,400	$	1,338	$	4,322	$	4,094
Americas other than United States	281		250		890		814
United Kingdom	396		331		1,456		1,348
Ireland	24		22		82		76
Europe, Middle East, & Africa other than United Kingdom and Ireland	479		403		2,093		1,930
Asia Pacific	373		352		1,158		1,087
Total revenue	$	2,953	$	2,696	$	10,001	$	9,349

Contract Costs

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Balance at beginning of period	$	242	$	239	$	355	$	361
Additions	357		320		1,074		1,022
Amortization	(321)		(291)		(1,156)		(1,109)
Impairment	—		—		—		—
Foreign currency translation and other	(5)		(12)		—		(18)
Balance at end of period	$	273	$	256	$	273	$	256

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Balance at beginning of period	$	186	$	182	$	185	$	179
Additions	14		8		37		35
Amortization	(13)		(12)		(38)		(36)
Impairment	—		—		—		—
Foreign currency translation and other	(1)		(2)		2		(2)
Balance at end of period	$	186	$	176	$	186	$	176