Long-Term Debt - Textuals (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended			3 Months Ended		1 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended					0 Months Ended
	Mar. 13, 2012	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Mar. 31, 2012 Senior Notes due 2020 (8.625%) days	Jan. 13, 2012 Senior Notes due 2020 (8.625%)	Feb. 28, 2012 Senior Notes due 2014 (9.25%)	Mar. 31, 2012 Senior Notes due 2014 (9.25%)	Mar. 13, 2012 Convertible Senior Notes due 2013 (15.0%)	Mar. 31, 2012 Convertible Senior Notes due 2013 (15.0%)	Mar. 31, 2012 Prior to January 15 2016 [Member] Senior Notes due 2020 (8.625%)	Mar. 31, 2012 Twelve Months Beginning January 15 2016 [Member] Senior Notes due 2020 (8.625%)	Mar. 31, 2012 Twelve Months Beginning January 15 2017 [Member] Senior Notes due 2020 (8.625%)	Mar. 31, 2012 Twelve Months Beginning January 15 2018 [Member] Senior Notes due 2020 (8.625%)	Mar. 13, 2012 Shares issued upon conversion of debt instrument face amount [Member]	Mar. 13, 2012 Shares issued upon conversion of debt instrument premium [Member]	Mar. 31, 2012 Term Loans Senior Secured Term Loan	Dec. 31, 2011 Term Loans Senior Secured Term Loan	Mar. 31, 2012 Tranche-A Term Loan One Billion Dollars Term Loans Senior Secured Term Loan	Mar. 31, 2012 Tranche A Term Loan Term Loans Senior Secured Term Loan	Mar. 31, 2012 Tranche A Term Loan including $1 billion and $400 million tranches [Member] Term Loans Senior Secured Term Loan	Dec. 31, 2011 Tranche A Term Loan including $1 billion and $400 million tranches [Member] Term Loans Senior Secured Term Loan
Debt and Capital Lease Obligations by Maturity [Abstract]
2012 (Remaining Months)		$ 47
2013		212
2014		1,425
2015		838
2016		207
2017		706
Thereafter		5,067
Long-term debt
Debt Instrument, Interest Rate, Stated Percentage					8.625%			9.25%		15.00%
Debt Conversion, Converted Instrument, Shares Issued	5.4														3.7	1.7
Accrued Interest on conversion into equity		2	0
Debt Conversion, Original Debt, Amount									100
Debt Instrument Redemption Minimum Gross Proceeds from Equity Offering					100
DebtInstrumentRedemptionPriceAsPercentageOfOriginalPrincipalPriortoJanuary152016					108.625%
DebtInstrumentRedemptionPeriodMaximumPriortoJanuary152016					90
Minimum percentage of princiapl that must remain outstanding after redemption					65.00%
Debt Instrument Redemption Period Notice Minimum Number of Days Prior to January 15 2016					30
Debt Instrument Redemption Period Notice Maximum Number of Days Prior to January 15 2016					60
Maximum Principal that can be redeemed prior to January 15 2015					35.00%
Debt Instrument Redemption Price as Percentage of Principal Amount											100.00%	104.313%	102.156%	100.00%
Repayments of Long-term Debt							807
Loss on extinguishment of debt, net		(61)	(20)					22		39
Unamortized Debt Issuance Expense						20
Debt Instrument, Face Amount						900
Long-term Debt, Gross		$ 8,502		$ 8,528													$ 2,600	$ 2,600	$ 1,000	$ 1,400
Debt Instrument, Interest Rate at Period End																					2.73%	2.65%