Unaudited Quarterly Financial Data (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Selected Quarterly Financial Information [Abstract]
Revenue	$ 1,614	$ 1,590	$ 1,586	$ 1,586	$ 1,579	$ 927	$ 913	$ 914	$ 6,376	$ 4,333	$ 3,591
Gross Margin	959	948	938	929	919	585	566	557
Operating Income (Loss)	188	138	133	116	45	7	3	(3)	575	52	(88)
Net Loss	(56)	(166)	(62)	(138)	(163)	(207)	(181)	(205)	(422)	(756)	(622)
Net Loss per Share, Basic and Diluted	$ (0.26)	$ (0.76)	$ (0.29)	$ (0.66)	$ (0.80)	$ (1.75)	$ (1.59)	$ (1.83)	$ (1.96)	$ (5.51)	$ (5.62)
Selling, General and Administrative									2,416	1,759	1,373
Restructuring Charges	20				11				34	11	2
Depreciation expense									659	706	775
Depreciation and Amortization									749	805	870
Impairment of Intangible Assets (Excluding Goodwill)					20					20
Loss on extinguishment of debt		(49)		(61)	(27)	(30)			(160)	(100)	(59)
Property, Plant and Equipment, Gross	16,558				15,814				16,558	15,814
Long-term Debt, Gross	8,780				8,528				8,780	8,528
Asset Retirement Obligation, Revision of Estimate	(73)								(73)	0
Debt conversion, shares issued upon conversion (in shares)				5.4
Tranche A Term Loan
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt		(9)
Debt Instrument, Face Amount		1,400
Loss on Cash Flow Hedge Ineffectiveness		60
Tranche B II and Tranche B III Term Loans
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt	(50)
Tranche B II Term Loan
Selected Quarterly Financial Information [Abstract]
Debt Instrument, Face Amount	650								650
Tranche B III Term Loan
Selected Quarterly Financial Information [Abstract]
Debt Instrument, Face Amount	550								550
Senior Notes due 2017 (8.75%)
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt		(40)
Debt instrument, stated interest rate (as a percent)		8.75%			8.75%					8.75%
Long-term Debt, Gross	0				700				0	700
Convertible Senior Notes due 2013 (15.0%)
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt				(39)
Debt instrument, stated interest rate (as a percent)	15.00%			15.00%	15.00%	15.00%			15.00%	15.00%
Long-term Debt, Gross	172				272				172	272
Convertible Senior Notes due 2012 (3.5%)
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt								(12)
Debt instrument, stated interest rate (as a percent)					3.50%	3.50%				3.50%
Senior Notes due 2014 (9.25%)
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt				(22)			(23)
Debt instrument, stated interest rate (as a percent)				9.25%	9.25%		9.25%			9.25%
Long-term Debt, Gross	0				807				0	807
Convertible Senior Notes due 2011 (5.25%) and Convertible Senior Discount Notes due 2013 (9.0%)
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt								(20)
Convertible Senior Notes due 2011 (5.25%)
Selected Quarterly Financial Information [Abstract]
Debt instrument, stated interest rate (as a percent)								5.25%
Convertible Senior Discount Notes due 2013 (9.0%)
Selected Quarterly Financial Information [Abstract]
Debt instrument, stated interest rate (as a percent)								9.00%
Asset Retirement Obligation Change in Estimate
Selected Quarterly Financial Information [Abstract]
Selling, General and Administrative	(47)								(47)
Depreciation and Amortization	(2)								(2)
Property, Plant and Equipment, Gross	(24)								(24)
Service Life
Selected Quarterly Financial Information [Abstract]
Net Loss										74
Net Loss per Share, Basic and Diluted										$ 0.54
Depreciation expense					$ (74)