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Income Taxes - Source of income Before Provision for Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
U.S. $ 1,039 $ 936 $ 1,099
Non-U.S. 771 736 688
Income before provision for income taxes $ 1,810 $ 1,672 $ 1,787