Consolidated Statements of Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total USD ($)	Number of shares of common stock [Member]	Common stock and additional paid-in capital [Member] USD ($)	Accumulated deficit [Member] USD ($)	Accumulated other comprehensive income (loss) [Member] USD ($)
Beginning Balance at Dec. 31, 2010	$ 23,944		$ 27,299	$ (3,508)	$ 153
Beginning Balance, Shares at Dec. 31, 2010		932.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,683			3,683
Other comprehensive income (loss), net of tax	18				18
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-based compensation	(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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,345			4,345
Other comprehensive income (loss), net of tax	(25)				(25)
Dividends	(1,187)			(1,187)
Issuance of common stock in connection with the Company’s equity award programs	1,288		1,288
Issuance of common stock in connection with the Company’s equity award programs, Shares		23.0
Stock-based compensation	359		359
Tax impact related to employee stock-based compensation	(87)		(87)
Repurchases of common stock	(4,662)			(4,662)
Repurchases of common stock, Shares	(62.3)	(62.3)
Ending Balance at Dec. 31, 2012	19,060		29,337	(10,423)	146
Ending Balance, Shares at Dec. 31, 2012	756.3	756.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,081			5,081
Other comprehensive income (loss), net of tax	(307)				(307)
Dividends	(1,521)			(1,521)
Issuance of common stock in connection with the Company’s equity award programs	296		296
Issuance of common stock in connection with the Company’s equity award programs, Shares		7.4
Stock-based compensation	400		400
Settlement of conversion value of convertible debt in excess of principal	(99)		(99)
Settlement of convertible note hedge	99		99
Settlement of warrants	(100)		(100)
Tax impact related to employee stock-based compensation	(42)		(42)
Repurchases of common stock	(771)			(771)
Repurchases of common stock, Shares	(9.1)	(9.1)
Ending Balance at Dec. 31, 2013	$ 22,096		$ 29,891	$ (7,634)	$ (161)
Ending Balance, Shares at Dec. 31, 2013	754.6	754.6