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Income Taxes - Income Before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]      
United States $ (79) $ (26) $ 93
Foreign 106 84 128
Total income before income taxes $ 27 $ 58 $ 221