Condensed Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (2,326)	$ 677
Other comprehensive income (loss), net of reclassification adjustments:
Foreign currency translation	(29)	(301)
Unrealized gains (losses) on investments, net	(97)	140
Tax (expense) benefit on unrealized gains (losses) on investments, net	42	(54)
Unrealized gains (losses) on hedging activities, net	15	86
Tax (expense) benefit on unrealized gains (losses) on hedging activities, net	(3)	(3)
Other comprehensive income (loss), net tax	(72)	(132)
Comprehensive income (loss)	$ (2,398)	$ 545