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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Effective Tax Rate        
Income before income taxes $ 665 $ 1,458 $ 2,972 $ 1,291
Income tax expense $ 152 $ 380 $ 723 $ 295
Effective income tax rate 22.90% 26.10% 24.30% 22.90%
Uncertain Tax Benefits        
Non-current tax liability for uncertain tax benefits $ 20   $ 20  
Uncertain tax benefits, penalties and interest accrued $ 1   $ 1