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Income Taxes - Components of Income Tax Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Current income tax expense      
Federal $ (4) $ 16 $ 1
State and other income tax (2) 14 (1)
Total current income taxes (6) 30 0
Deferred income tax expense      
Federal 109 86 85
State and other income tax 1 (16) 19
Total deferred income tax 110 70 104
Income Tax Expense $ 104 $ 100 $ 104