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Income Taxes - Summary of Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Income Tax Disclosure [Abstract]    
Earnings before income taxes $ 599 $ 222
Income tax expense computed at United States statutory tax rate 126 47
Valuation allowances 3 1
U.S. foreign income items, net of credits 7 3
Other 23 22
Income tax expense (benefit) computed at effective worldwide tax rates $ 159 $ 73