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Income Taxes Income Before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]      
United States $ (88) $ 301 $ 362
Foreign (56) 193 146
(Loss) income before income taxes $ (144) $ 494 $ 508