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Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Income Tax Contingency [Line Items]    
Estimated annual effective tax rate 25.20% 25.20%
Effective tax rate 19.10% 21.20%
Discrete net tax benefits $ 65 $ 28
Net benefit from the release of uncertain tax positions due to expiration of statutes of limitations, audit settlements 32 $ 22
U.S.    
Income Tax Contingency [Line Items]    
Tax benefit due to new tax guidance $ 27