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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Income Tax Disclosure [Abstract] |
Schedule of Provision for Income Taxes | The provision for income taxes consists of the following (in millions):
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Current: |  |  |  |  |  |  |  |  |
Federal |  | $ | 149 |  |  | $ | — |  |  | $ | (46 | )
State |  |  | 7 |  |  |  | 5 |  |  |  | 6 |
|  |  | 156 |  |  |  | 5 |  |  |  | (40 | )
Deferred: |  |  |  |  |  |  |  |  |
Federal |  |  | (5 | ) |  |  | 166 |  |  |  | 161 |
State |  |  | 40 |  |  |  | (1 | ) |  |  | 10 |
|  |  | 35 |  |  |  | 165 |  |  |  | 171 |
Total provision for income taxes for income |  | $ | 191 |  |  | $ | 170 |  |  | $ | 131 |
Schedule of Reconciliation between the Statutory Federal Income Tax Rate and the Effective Tax Rate | The following table reconciles the differences between the statutory federal income tax rate and the effective tax rate (dollars in millions):
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
|  | Amount |  |  | % |  |  | Amount |  |  | % |  |  | Amount |  |  | % |
Provision for income taxes at statutory federal rate |  | $ | 44 |  |  |  | 21.0 | % |  | $ | 73 |  |  |  | 21.0 | % |  | $ | 105 |  |  |  | 21.0 | %
State income taxes, net of federal income tax benefit |  |  | 37 |  |  |  | 17.9 |  |  |  | 3 |  |  |  | 0.8 |  |  |  | 44 |  |  |  | 8.7 |
Net income attributable to noncontrolling interests |  |  | (31 | ) |  |  | (14.9 | ) |  |  | (28 | ) |  |  | (8.0 | ) |  |  | (29 | ) |  |  | (5.8 | )
Change in valuation allowance |  |  | 88 |  |  |  | 42.5 |  |  |  | 122 |  |  |  | 34.9 |  |  |  | 33 |  |  |  | 6.8 |
Change in uncertain tax position |  |  | 10 |  |  |  | 4.9 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Nondeductible goodwill |  |  | 29 |  |  |  | 14.1 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amended return adjustments |  |  | 9 |  |  |  | 4.3 |  |  |  | — |  |  |  | — |  |  |  | (22 | ) |  |  | (4.4 | )
Other |  |  | 5 |  |  |  | 2.5 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Provision for income taxes and effective tax rate for income |  | $ | 191 |  |  |  | 92.3 | % |  | $ | 170 |  |  |  | 48.7 | % |  | $ | 131 |  |  |  | 26.3 | %
Schedule of Components of Deferred Income Taxes | Deferred income taxes are based on the estimated future tax effects of differences between the financial statement and tax bases of assets and liabilities under the provisions of the enacted tax laws. Deferred income taxes as of December 31, 2023 and 2022 consist of (in millions):
|  | December 31, |
|  | 2023 |  |  | 2022 |
|  | Assets |  |  | Liabilities |  |  | Assets |  |  | Liabilities |
Net operating loss and credit carryforwards |  | $ | 533 |  |  | $ | — |  |  | $ | 553 |  |  | $ | — |
Property and equipment |  |  | — |  |  |  | 326 |  |  |  | — |  |  |  | 323 |
Self-insurance liabilities |  |  | 16 |  |  |  | — |  |  |  | 30 |  |  |  | — |
Prepaid expenses |  |  | — |  |  |  | 30 |  |  |  | — |  |  |  | 31 |
Intangibles |  |  | — |  |  |  | 163 |  |  |  | — |  |  |  | 148 |
Investments in unconsolidated affiliates |  |  | — |  |  |  | 72 |  |  |  | — |  |  |  | 58 |
Other liabilities |  |  | — |  |  |  | 7 |  |  |  | — |  |  |  | 9 |
Long-term debt and interest |  |  | 32 |  |  |  | — |  |  |  | 41 |  |  |  | — |
Accounts receivable |  |  | 16 |  |  |  | — |  |  |  | 16 |  |  |  | — |
IRC Section 163(j) interest limitation |  |  | 582 |  |  |  | — |  |  |  | 448 |  |  |  | — |
Accrued vacation |  |  | 19 |  |  |  | — |  |  |  | 19 |  |  |  | — |
Accrued bonus |  |  | 27 |  |  |  | — |  |  |  | 19 |  |  |  | — |
Other comprehensive income |  |  | 4 |  |  |  | — |  |  |  | 6 |  |  |  | — |
Right-of-use assets |  |  | — |  |  |  | 165 |  |  |  | — |  |  |  | 148 |
Right-of-use liability |  |  | 173 |  |  |  | — |  |  |  | 156 |  |  |  | — |
Stock-based compensation |  |  | 4 |  |  |  | — |  |  |  | 5 |  |  |  | — |
Deferred compensation |  |  | 38 |  |  |  | — |  |  |  | 51 |  |  |  | — |
IRC Section 481(a) adjustments |  |  | — |  |  |  | 57 |  |  |  | — |  |  |  | 122 |
Other |  |  | 19 |  |  |  | — |  |  |  | 19 |  |  |  | — |
Total |  |  | 1,463 |  |  |  | 820 |  |  |  | 1,363 |  |  |  | 839 |
Valuation allowance |  |  | (983 | ) |  |  | — |  |  |  | (829 | ) |  |  | — |
Total deferred income taxes |  | $ | 480 |  |  | $ | 820 |  |  | $ | 534 |  |  | $ | 839 |
Schedule of Reconciliation of the Total Amount of Unrecognized Tax Benefit | The following is a tabular reconciliation of the total amount of unrecognized tax benefit for the years ended December 31, 2023, 2022 and 2021 (in millions):
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Unrecognized tax benefit, beginning of year |  | $ | 50 |  |  | $ | 42 |  |  | $ | 45 |
Gross increases — tax positions in current period |  |  | 9 |  |  |  | 8 |  |  |  | 5 |
Reductions — tax positions in prior period |  |  | (1 | ) |  |  | — |  |  |  | (8 | )
Unrecognized tax benefit, end of year |  | $ | 58 |  |  | $ | 50 |  |  | $ | 42 |

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