CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 127	$ (23)	$ 733	$ 474
Other comprehensive income (loss):
Foreign currency translation adjustment	5	(206)	(240)	(230)
Unrealized gains (losses) on forward contracts designated as hedges, net of deferred income taxes of $0 million for the periods ended September 30, 2015 and 2014	(3)	5	3	5
Unrealized losses on investments, net of deferred income taxes of $0 million for the periods ended September 30, 2015 and 2014	(1)	0	(4)	0
Total other comprehensive income (loss)	1	(201)	(241)	(225)
Comprehensive income (loss)	$ 128	$ (224)	$ 492	$ 249