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Income Taxes Reconciliation of Provision for Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Current Provision:      
Federal $ 4,098 $ 2,629 $ 2,897
State and local 392 319 219
Foreign 491 564 404
Total current provision 4,981 3,512 3,520
Deferred (benefit) provision (8) 230 42
Total provision for income taxes $ 4,973 $ 3,742 $ 3,562