Unaudited Quarterly Financial Data (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Selected Quarterly Financial Information [Abstract]
Revenue	$ 1,602	$ 1,569	$ 1,565	$ 1,577	$ 1,614	$ 1,590	$ 1,586	$ 1,586	$ 6,313	$ 6,376	$ 4,333
Gross Margin	984	961	949	948	959	948	938	929
Operating Income (Loss)	219	152	140	155	188	138	133	116	666	575	52
Net Loss	14	(21)	(24)	(78)	(56)	(166)	(62)	(138)	(109)	(422)	(756)
Net Loss per Share, Basic and Diluted	$ 0.06	$ (0.09)	$ (0.11)	$ (0.36)	$ (0.26)	$ (0.76)	$ (0.29)	$ (0.66)	$ (0.49)	$ (1.96)	$ (5.51)
Selling, General and Administrative									2,376	2,450	1,770
Restructuring Charges					20
Depreciation expense									727	659	706
Depreciation and Amortization									800	749	805
Impairment of Intangible Assets (Excluding Goodwill)											20
Loss on extinguishment of debt	67					(49)		(61)	(84)	(160)	(100)
Property, Plant and Equipment, Gross	17,329				16,558				17,329	16,558
Long-term Debt, Gross	8,392				8,780				8,392	8,780
Asset Retirement Obligation, Revision of Estimate					(73)				0
Debt conversion, shares issued upon conversion (in shares)								5,400,000
TrancheBII2019TermLoan [Member]
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt	10
Debt instrument, stated interest rate (as a percent)					4.75%					4.75%
Senior Notes 10 Point 0 Percent Due 2018 [Member]
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt	56
Debt instrument, stated interest rate (as a percent)	10.00%								10.00%		10.00%
Long-term Debt, Gross	0				640				0	640
Floating Rate Senior Notes due 2015 [Member]
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt	1
Debt instrument, stated interest rate (as a percent)	4.469%								4.469%		4.202%
Long-term Debt, Gross	0				300				0	300
Tranche B 2016 and Tranche B 2019 Term Loans [Member]
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt		17
Tranche A Term Loan
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt		(9)				(9)
Debt Instrument, Face Amount						1,400.0
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)				(50)
Tranche B II Term Loan
Selected Quarterly Financial Information [Abstract]
Debt Instrument, Face Amount	650.0								650.0
Tranche B III Term Loan
Selected Quarterly Financial Information [Abstract]
Debt Instrument, Face Amount					550.0					550.0
Senior Notes due 2017 (8.75%)
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt		(40)				(40)
Debt instrument, stated interest rate (as a percent)						8.75%					8.75%
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%
Long-term Debt, Gross	0				172				0	172
Senior Notes due 2014 (9.25%)
Selected Quarterly Financial Information [Abstract]
Loss on extinguishment of debt								(22)
Debt instrument, stated interest rate (as a percent)								9.25%			9.25%
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)
Asset Retirement Obligation, Revision of Estimate										$ (73)