CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 212	$ 204	$ 606	$ 497
Other comprehensive income (loss):
Foreign currency translation adjustment	85	(19)	(245)	(24)
Unrealized gains (losses) on forward contracts designated as hedges, net of deferred income taxes of $0 million for the periods ended June 30, 2015 and 2014	(8)	0	6	0
Unrealized losses on investments, net of deferred income taxes of $0 million for the periods ended June 30, 2015 and 2014	(3)	0	(3)	0
Total other comprehensive income (loss)	74	(19)	(242)	(24)
Comprehensive income	$ 286	$ 185	$ 364	$ 473