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Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Statement of Comprehensive Income [Abstract]      
CTA, taxes $ (3) $ 4 $ 27
Pension liability adjustment, taxes (22) 10 18
Net unrealized gain (loss) on derivatives, tax $ 0 $ 0 $ 0