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Income Taxes (Components of Income Before Income Taxes and Equity Earnings) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]      
U.S. $ 93 $ (3) $ 21
Foreign 833 789 719
Income before income taxes $ 926 $ 786 $ 740