Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Commercial Risk Solutions	$	1,126	$	1,167	$	2,272	$	2,285
Reinsurance Solutions	448		420		1,296		1,208
Retirement Solutions	393		419		790		839
Health Solutions	258		317		760		803
Data & Analytic Services	274		286		605		622
Elimination	(2)		(3)		(7)		(8)
Total revenue	$	2,497	$	2,606	$	5,716	$	5,749

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 June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
United States	$	1,107	$	1,146	$	2,334	$	2,307
Americas other than United States	219		241		447		467
United Kingdom	444		400		944		852
Ireland	21		20		44		42
Europe, Middle East, & Africa other than United Kingdom and Ireland	404		481		1,359		1,468
Asia Pacific	302		318		588		613
Total revenue	$	2,497	$	2,606	$	5,716	$	5,749

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 June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Balance at beginning of period	$	229	$	236	$	335	$	329
Additions	274		336		592		682
Amortization	(313)		(357)		(729)		(796)
Impairment	—		—		—		—
Foreign currency translation and other	3		1		(5)		1
Balance at end of period	$	193	$	216	$	193	$	216

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 June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Balance at beginning of period	$	167	$	155	$	171	$	156
Additions	16		17		28		26
Amortization	(11)		(11)		(23)		(22)
Impairment	—		—		—		—
Foreign currency translation and other	—		—		(4)		1
Balance at end of period	$	172	$	161	$	172	$	161