Revenue from Contracts with Customers

12 Months Ended

Dec. 31, 2020

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):

	Years ended December 31
	2020		2019		2018
Commercial Risk Solutions	$	4,690	$	4,673	$	4,652
Reinsurance Solutions	1,814		1,686		1,563
Retirement Solutions	1,753		1,817		1,865
Health Solutions	1,655		1,667		1,596
Data & Analytic Services	1,171		1,184		1,105
Elimination	(17)		(14)		(11)
Total revenue	$	11,066	$	11,013	$	10,770

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
	2020		2019		2018
U.S.	$	5,032	$	5,016	$	4,677
Americas other than U.S.	911		919		940
U.K.	1,579		1,502		1,555
Ireland	84		75		80
Europe, Middle East, & Africa other than U.K. and Ireland	2,236		2,263		2,333
Asia Pacific	1,224		1,238		1,185
Total revenue	$	11,066	$	11,013	$	10,770

Contract Costs

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

	2020		2019
Balance at beginning of period	$	335	$	329
Additions	1,360		1,453
Amortization	(1,360)		(1,447)
Impairment	—		—
Foreign currency translation and other	4		—
Balance at end of period	$	339	$	335

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

	2020		2019
Balance at beginning of period	$	171	$	156
Additions	61		58
Amortization	(47)		(44)
Impairment	—		—
Foreign currency translation and other	(1)		1
Balance at end of period	$	184	$	171