Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 1,434	$ 1,184
Other comprehensive income (loss), net of reclassification adjustments and taxes:
Foreign currency translation losses	(23)	(2)
Effective portion of cash flow hedges	75	(65)
Net unrealized gains (losses) on available-for-sale securities	(62)	2
Other	1	0
Other comprehensive loss, net of tax	(9)	(65)
Comprehensive income	$ 1,425	$ 1,119