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Income Taxes - Reconciliation of Change in Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Gross Unrecognized Tax Benefits      
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning balance $ 33 $ 41 $ 405
Additions for tax positions related to the current year 12 2 3
Additions for tax positions related to prior years 28 10 14
Reductions for tax positions related to prior years due to IRS and other settlements (8) (20) (381)
Ending balance 65 33 41
Portion of balance that if recognized, would impact the effective income tax rate 60    
Accrued Interest and Penalties      
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning balance 7 10 14
Additions for tax positions related to the current year 0 0 0
Additions for tax positions related to prior years 5 4 6
Reductions for tax positions related to prior years due to IRS and other settlements (1) (7) (10)
Ending balance 11 7 10
Portion of balance that if recognized, would impact the effective income tax rate 9    
Gross Tax, Interest and Penalties      
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning balance 40 51 419
Additions for tax positions related to the current year 12 2 3
Additions for tax positions related to prior years 33 14 20
Reductions for tax positions related to prior years due to IRS and other settlements (9) (27) (391)
Ending balance 76 $ 40 $ 51
Portion of balance that if recognized, would impact the effective income tax rate $ 69