Condensed Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 78	$ 94	$ 413	$ 306
Other comprehensive loss, net of tax:
Foreign currency translation	2	1	9	3
Unrealized (losses) gains on marketable securities	0	(1)	1	2
Unrealized gains on pension obligation	0	0	0	1
Unrealized losses on hedging activities, net of tax of $(14), $(9), $(59) and $(46), respectively	(25)	(16)	(107)	(84)
Other comprehensive loss, net of tax	(23)	(16)	(97)	(78)
Comprehensive income	$ 55	$ 78	$ 316	$ 228