CONDENSED CONSOLIDATED STATEMENT 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)	$ 539	$ 673	$ 1,248	$ (977)
Other comprehensive income (loss), net of reclassification adjustments:
Foreign currency translation gain (loss)	(182)	(214)	(426)	(123)
Unrealized gains (losses) on investments, net	(442)	67	(320)	(14)
Tax benefit (expense) on unrealized gains (losses) on investments, net	155	(33)	111	(1)
Unrealized gains (losses) on hedging activities, net	(19)	174	(82)	211
Tax benefit (expense) on unrealized gains (losses) on hedging activities, net	1	(2)	1	(6)
Other comprehensive income (loss), net tax	(487)	(8)	(716)	67
Comprehensive income (loss)	$ 52	$ 665	$ 532	$ (910)