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Income Taxes - Income from Continuing Operations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
(Loss) Income Before Income Taxes [Abstract]      
United States $ 35 $ (24) $ (235)
Foreign 344 (71) 372
Income (loss) from continuing operations before income taxes $ 379 $ (95) $ 137