Consolidated Statements of Stockholders' Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2010		$ 15		$ 16,232	$ (4,822)	$ (129)
Balance (Shares) at Dec. 31, 2010		1,520,780,112
Net income (loss)	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		15	(492)	16,349	(4,381)	(138)
Balance (Shares) at Dec. 31, 2011		1,531,006,390
Net income (loss)	(4,068)				(4,068)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment	32					32
Net change in derivative financial instruments	82					82
Net change in certain retirement plans	(9)					(9)
Impact of stock-based compensation plans, net of tax (Shares)		11,340,798
Impact of stock-based compensation plans, net of tax				80
Acquisition of treasury stock			(600)
Balance at Dec. 31, 2012	6,870	15	(1,092)	16,429	(8,449)	(33)
Balance (Shares) at Dec. 31, 2012	1,542,347,188	1,542,347,188
Net income (loss)	(121)				(121)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment	10					10
Net change in derivative financial instruments	107					107
Net change in certain retirement plans	22					22
Impact of stock-based compensation plans, net of tax (Shares)		17,955,446
Stock Issued During Period, Value, New Issues		1
Impact of stock-based compensation plans, net of tax				150
Acquisition of treasury stock			(500)
Balance at Dec. 31, 2013	$ 6,539	$ 16	$ (1,592)	$ 16,579	$ (8,570)	$ 106
Balance (Shares) at Dec. 31, 2013	1,560,302,634	1,560,302,634