Consolidated Statements of Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total USD ($)	Number of shares of common stock	Common stock and additional paid-in capital USD ($)	Accumulated deficit USD ($)	Accumulated other comprehensive income USD ($)
Beginning balance at Dec. 31, 2008	$ 20,885		$ 26,441	$ (5,673)	$ 117
Beginning balance, shares at Dec. 31, 2008		1,047.5
Comprehensive income:
Net income	4,605			4,605
Other comprehensive income (loss), net of tax	(72)				(72)
Comprehensive income	4,533
Issuance of common stock in connection with the Company's equity award programs	190		190
Issuance of common stock in connection with the Company's equity award programs, shares		6.3
Stock-based compensation	324		324
Tax impact related to employee stock options	(11)		(11)
Repurchase of common stock	(3,254)			(3,254)
Repurchases of common stock, shares	(59.2)	(59.2)
Ending balance at Dec. 31, 2009	22,667		26,944	(4,322)	45
Ending balance, shares at Dec. 31, 2009		994.6
Comprehensive income:
Net income	4,627			4,627
Other comprehensive income (loss), net of tax	108				108
Comprehensive income	4,735
Issuance of common stock in connection with the Company's equity award programs	69		69
Issuance of common stock in connection with the Company's equity award programs, shares		4.0
Stock-based compensation	357		357
Tax impact related to employee stock options	(71)		(71)
Repurchases of common stock	(3,800)			(3,800)
Repurchases of common stock, shares	(66.5)	(66.5)
Other	(13)			(13)
Ending balance at Dec. 31, 2010	23,944		27,299	(3,508)	153
Ending balance, shares at Dec. 31, 2010	932.1	932.1
Comprehensive income:
Net income	3,683			3,683
Other comprehensive income (loss), net of tax	18				18
Comprehensive income	3,701
Dividends	(787)			(787)
Issuance of common stock in connection with the Company's equity award programs	230		230
Issuance of common stock in connection with the Company's equity award programs, shares		7.8
Stock-based compensation	337		337
Tax impact related to employee stock options	(89)		(89)
Repurchases of common stock	(8,307)			(8,307)
Repurchases of common stock, shares	(144.3)	(144.3)
Ending balance at Dec. 31, 2011	$ 19,029		$ 27,777	$ (8,919)	$ 171
Ending balance, shares at Dec. 31, 2011	795.6	795.6