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Income Taxes - Geographical Sources 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 $ 33 $ 83 $ (25)
Outside United States 527 515 549
Total $ 560 $ 598 $ 524