v2.4.0.6
Debt (Details 3) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Debt Instrument [Line Items]    
Long-term Debt $ 10,425 $ 10,256
Steamboat [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 437 445
Debt Instrument, Interest Rate, Effective Percentage 6.60% [1] 6.60% [1]
OMEC [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 355 364
Debt Instrument, Interest Rate, Effective Percentage 6.80% [1] 6.80% [1]
BRSP [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 232 297
Debt Instrument, Interest Rate, Effective Percentage 5.70% [1] 5.70% [1]
Metcalf [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 0 [2] 251 [2]
Debt Instrument, Interest Rate, Effective Percentage 0.00% [1],[2] 6.90% [1],[2]
Pasadena [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 185 [3] 208 [3]
Debt Instrument, Interest Rate, Effective Percentage 8.80% [1],[3] 8.60% [1],[3]
Bethpage [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 98 [4] 103 [4]
Debt Instrument, Interest Rate, Effective Percentage 7.00% [1],[4] 7.00% [1],[4]
Deer Park [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 0 99
Debt Instrument, Interest Rate, Effective Percentage 0.00% [1] 7.70% [1]
Gilroy note payable [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 49 64
Debt Instrument, Interest Rate, Effective Percentage 10.60% [1] 10.60% [1]
Gilroy Energy Center [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 0 38
Debt Instrument, Interest Rate, Effective Percentage 0.00% [1] 7.30% [1]
Whitby [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 0 [5] 26 [5]
Debt Instrument, Interest Rate, Effective Percentage 0.00% [1],[5] 9.10% [1],[5]
GEC Holdings [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 0 14
Debt Instrument, Interest Rate, Effective Percentage 0.00% [1] 16.60% [1]
Russell City Energy [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 244 0
Debt Instrument, Interest Rate, Effective Percentage 4.10% [1] 0.00% [1]
Los Esteros Project [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 83 0
Debt Instrument, Interest Rate, Effective Percentage 3.80% [1] 0.00% [1]
Other [Member]
    
Debt Instrument [Line Items]    
Long-term Debt 8 13
Debt Instrument, Interest Rate, Effective Percentage 0.00% [1] 0.00% [1]
Project Financing Total [Member]
    
Debt Instrument [Line Items]    
Long-term Debt $ 1,691 $ 1,922
[1] Our weighted average interest rate calculation includes the amortization of deferred financing costs and debt discount.
[2] On June 17, 2011, we repaid Metcalf and Deer Park project debt with the proceeds received from $360 million in borrowings under the New Term Loan as further described above.
[3] Represents a sale-leaseback transaction that is accounted for as financing transaction under U.S. GAAP.
[4] Represents a weighted average of first and second lien loans for the weighted average effective interest rates.
[5] The Whitby Holdings debt was purchased from a third party in 2011.