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Income Taxes - Sources of Income (Loss) Before Taxes and Equity in Income (Loss) of Unconsolidated Subsidiaries and Affiliates (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Parent country source $ (3) $ (6) $ (211)
Foreign sources 1,173 1,472 870
Income before income taxes and equity in income of unconsolidated subsidiaries and affiliates $ 1,170 $ 1,466 $ 659