v2.4.0.6
Debt Debt (First Lien Notes) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Debt Instrument [Line Items]    
Long-term Debt $ 10,750 $ 10,425
First Lien Notes 2017 [Member]
    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Effective Percentage 7.50% [1] 7.50% [1]
Long-term Debt 1,080 1,200
First Lien Notes 2019 [Member]
    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Effective Percentage 8.20% [1] 8.20% [1]
Long-term Debt 360 400
First Lien Notes 2020 [Member]
    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Effective Percentage 8.10% [1] 8.10% [1]
Long-term Debt 983 1,092
First Lien Notes 2021 [Member]
    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Effective Percentage 7.70% [1] 7.70% [1]
Long-term Debt 1,800 2,000
First Lien Notes 2023 [Member]
    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Effective Percentage 8.00% [1] 8.00% [1]
Long-term Debt 1,080 1,200
Corporate Debt Securities [Member]
    
Debt Instrument [Line Items]    
Long-term Debt $ 5,303 [2] $ 5,892 [2]
[1] Our weighted average interest rate calculation includes the amortization of deferred financing costs and debt discount.
[2] During the fourth quarter of 2012, we redeemed 10% of the aggregate principal amount of our First Lien Notes and repaid project debt with proceeds received from the issuance of our 2019 First Lien Term Loan.