Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2019

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 March 31
	2019			2018
Commercial Risk Solutions	$	1,118		$	1,184
Reinsurance Solutions	788			742
Retirement Solutions	420			424
Health Solutions	486			451
Data & Analytic Services	336			294
Elimination	(5		)	(5		)
Total revenue	$	3,143		$	3,090

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
	2019		2018
United States	$	1,161	$	1,116
Americas other than United States	226		237
United Kingdom	452		484
Europe, Middle East, & Africa other than United Kingdom	1,009		979
Asia Pacific	295		274
Total revenue	$	3,143	$	3,090

Contract Costs

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

As of	March 31, 2019			December 31, 2018
Balance at beginning of period	$	329		$	298
Additions	346			1,504
Amortization	(439		)	(1,465		)
Impairment	—			—
Foreign currency translation and other	—			(8		)
Balance at end of period	$	236		$	329

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

As of	March 31, 2019			December 31, 2018
Balance at beginning of period	$	156		$	145
Additions	9			53
Amortization	(11		)	(41		)
Impairment	—			—
Foreign currency translation and other	1			(1		)
Balance at end of period	$	155		$	156