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Income Taxes - Components of Loss from Continuing Operations Before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Domestic $ (1,000) $ (752) $ (686)
Foreign 562 2,377 1,886
(Loss) income before income taxes $ (438) $ 1,625 $ 1,200