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Income Taxes Schedule of Components of Income Tax Expense (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current:      
Federal $ 10 $ 16 $ 2
State and local 0 1 0
Current Income Tax Expense (Benefit) 10 17 2
Deferred:      
Federal 4 30 43
State and local 7 17 13
deferred income tax expense 11 47 56
Income tax expense $ 21 $ 64 $ 58