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Components of Income (Loss) before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Taxes [Abstract]      
Domestic $ (63) $ 397 $ (283)
Foreign 511 332 603
Income (loss) from continuing operations before income taxes $ 448 $ 729 $ 320