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Income Taxes - Income Before Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
U.S. income $ 1,599 $ 1,421 $ 710
Non-U.S. income 339 289 313
Income before income taxes and equity income $ 1,938 $ 1,710 $ 1,023