v2.4.0.6
Income Taxes (Components of Income Tax Expense (Benefit)) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Deferred:    
Total income tax expense (benefit) $ (6) $ (83) [1]
[1] Represents approximately $76 million related to the election to consolidate our CCFC and Calpine groups for federal income tax reporting purposes and $34 million related to intraperiod tax allocation tax benefits offset by approximately $27 million of state and foreign tax expense.