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Income Taxes - Accounting for Uncertainty in Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Taxes      
Unrecognized Tax Benefits, Beginning Balance $ 10 $ 27 $ 33
Decrease for statute of limitation expiration (1) (17) (6)
Unrecognized Tax Benefits, Ending Balance $ 9 $ 10 $ 27