Consolidated Statement of Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' equity, beginning of period at Dec. 31, 2009		$ 2	$ 9,986	$ (5,377)	$ 8,359	$ 818
Common stock, beginning of year at Dec. 31, 2009		1,298
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased/forfeited		0
Common stock and stock-based awards issued and assumed			124
Stock-based compensation			381
Stock-based awards tax benefit			(13)
Structured stock repurchases			3
Non-controlling interests			0
Common stock repurchase				(714)
Net income	1,801				1,801
Change in unrealized gains on investments	117					117
Change in unrealized gains (losses) on cash flow hedges	18					18
Foreign currency translation adjustment	(176)					(176)
Tax benefit (provision) on above items						(27)
Common stock issued		27
Common stock repurchased/forfeited		(27)
Stockholders' equity, end of period at Dec. 31, 2010	15,302	2	10,481	(6,091)	10,160	750
Common stock, end of period at Dec. 31, 2010		1,298
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased/forfeited		0
Common stock and stock-based awards issued and assumed			130
Stock-based compensation			458
Stock-based awards tax benefit			44
Structured stock repurchases			0
Non-controlling interests			32
Common stock repurchase				(1,064)
Net income	3,229				3,229
Change in unrealized gains on investments	57					57
Change in unrealized gains (losses) on cash flow hedges	58					58
Foreign currency translation adjustment	(280)					(280)
Tax benefit (provision) on above items						(36)
Common stock issued		22
Common stock repurchased/forfeited		(34)
Stockholders' equity, end of period at Dec. 31, 2011	17,930	2	11,145	(7,155)	13,389	549
Common stock, end of period at Dec. 31, 2011	1,286	1,286
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased/forfeited		0
Common stock and stock-based awards issued and assumed			312
Stock-based compensation			488
Stock-based awards tax benefit			117
Structured stock repurchases			0
Non-controlling interests			0
Common stock repurchase				(898)
Net income	2,609				2,609
Change in unrealized gains on investments	99					99
Change in unrealized gains (losses) on cash flow hedges	(127)					(127)
Foreign currency translation adjustment	335					335
Tax benefit (provision) on above items						0
Common stock issued		30
Common stock repurchased/forfeited		(22)
Stockholders' equity, end of period at Dec. 31, 2012	$ 20,865	$ 2	$ 12,062	$ (8,053)	$ 15,998	$ 856
Common stock, end of period at Dec. 31, 2012	1,294	1,294