Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

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

	Three Months Ended March 31,
	2021		2020
Commercial Risk Solutions	$	1,289	$	1,146
Reinsurance Solutions	922		848
Retirement Solutions	434		397
Health Solutions	536		502
Data & Analytic Services	351		331
Elimination	(7)		(5)
Total revenue	$	3,525	$	3,219

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 March 31,
	2021		2020
United States	$	1,308	$	1,227
Americas other than United States	250		228
United Kingdom	530		500
Ireland	33		23
Europe, Middle East, & Africa other than United Kingdom and Ireland	1,091		955
Asia Pacific	313		286
Total revenue	$	3,525	$	3,219

Schedule of Capitalized Contract Cost

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 March 31,
	2021		2020
Balance at beginning of period	$	339	$	335
Additions	346		318
Amortization	(443)		(416)
Impairment	—		—
Foreign currency translation and other	(1)		(8)
Balance at end of period	$	241	$	229

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 March 31,
	2021		2020
Balance at beginning of period	$	184	$	171
Additions	13		12
Amortization	(12)		(12)
Impairment	—		—
Foreign currency translation and other	—		(4)
Balance at end of period	$	185	$	167