v3.20.4
Income Taxes - Income Tax Domestic and Foreign (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
U.S. $ 3,493 $ 4,557 $ 3,686
Foreign 37 46 231
Income from continuing operations before income taxes $ 3,530 $ 4,603 $ 3,917