Condensed Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 640	$ 692	$ 1,317	$ 1,262
Other comprehensive income (loss), net of reclassification adjustments:
Foreign currency translation	36	(328)	(265)	(111)
Unrealized gains (losses) on investments, net	76	(180)	216	37
Tax (expense) benefit on unrealized gains (losses) on investments, net	(35)	67	(89)	6
Unrealized gains (losses) on hedging activities, net	25	42	111	(17)
Tax (expense) benefit on unrealized gains (losses) on hedging activities, net	0	(1)	(3)	0
Other comprehensive income (loss), net tax	102	(400)	(30)	(85)
Comprehensive income	$ 742	$ 292	$ 1,287	$ 1,177