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Income Taxes - Uncertain Tax Positions (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]      
Balance at beginning of period $ 585 $ 520 $ 634
Additions to current year tax positions 108 45 12
Additions to prior years' tax positions 28 72 14
Reductions to prior years' tax positions (109) (15) (98)
Reductions in tax positions due to lapse of statutory limitations (7) (19) (20)
Settlements (8) (18) (10)
Other (11) 0 (12)
Balance at end of period 586 585 $ 520
Unrecognized tax benefit that would favorably affect effective tax rate $ 415 $ 386