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Income Taxes - Expense Reconciliation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income tax expense reconciliation      
Statutory federal income tax expense $ (100) $ 26 $ 47
State income taxes, net of federal benefit 16 16 (23)
Change in federal valuation allowance 8 7 7
Goodwill impairment 83 0 0
Nondeductible compensation 7 7 6
Tax credits (3) (2) (2)
Other differences, net (1) (1) (2)
Total income tax expense (benefit) $ 10 $ 53 $ 33
Income tax rate reconciliation      
Statutory federal income tax rate 21.00% 21.00% 21.00%
State income taxes, net of federal benefit (3.40%) 12.80% (10.30%)
Change in federal valuation allowance (1.70%) 5.70% 3.10%
Goodwill impairment (17.40%) 0.00% 0.00%
Nondeductible compensation (1.40%) 5.60% 2.90%
Tax credits 0.60% (1.90%) (0.80%)
Other differences, net 0.20% (0.60%) (0.80%)
Total income tax rate (2.10%) 42.60% 15.10%