Income Taxes Level 4 (Details) - Components of Income Tax Expense (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Current [Abstract]      
Federal $ 0 $ 0 $ 0
State and local 2 3 (2)
Foreign 26 24 12
Total current 28 27 10
Deferred [Abstract]      
Federal 1 332 (365)
State and local (1) 10 (8)
Foreign (2) (20) (21)
Total deferred (2) 322 (394)
Income tax expense (benefit) $ 26 $ 349 $ (384)
Federal Statutory Income Tax Rate 35.00%