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Income Taxes - Domestic and Foreign Components of Income (Loss) Before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
United States $ (289) $ (12) $ 39
Foreign (141) (81) 19
Income (loss) before income taxes $ (430) $ (93) $ 58