Consolidated Statements of Stockholders' Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Comprehensive Income [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2008			$ 15		$ 15,944	$ (2,732)	$ (53)
Balance (Shares) at Dec. 31, 2008			1,501,635,679
Net income (loss)	(1,025)	(1,025)				(1,025)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment		21					21
Net change in derivative financial instruments		(11)					(11)
Impact of stock-based compensation plans, net of tax (Shares)			9,118,255
Impact of stock-based compensation plans, net of tax					142
Balance at Dec. 31, 2009		(1,015)	15		16,086	(3,757)	(43)
Balance (Shares) at Dec. 31, 2009			1,510,753,934
Net income (loss)	(1,065)	(1,065)				(1,065)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment		(58)					(58)
Net change in derivative financial instruments		(28)					(28)
Impact of stock-based compensation plans, net of tax (Shares)			10,026,178
Impact of stock-based compensation plans, net of tax					146
Balance at Dec. 31, 2010	11,296	(1,151)	15		16,232	(4,822)	(129)
Balance (Shares) at Dec. 31, 2010	1,520,780,112		1,520,780,112
Net income (loss)	441	441				441
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment		(8)					(8)
Net change in derivative financial instruments		17					17
Net change in certain retirement plans		(18)					(18)
Impact of stock-based compensation plans, net of tax (Shares)			10,226,278
Impact of stock-based compensation plans, net of tax					117
Acquisition of treasury stock				(492)
Balance at Dec. 31, 2011	$ 11,353	$ 432	$ 15	$ (492)	$ 16,349	$ (4,381)	$ (138)
Balance (Shares) at Dec. 31, 2011	1,531,006,390		1,531,006,390