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Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Abstract] |  |  |
Income Before Income Taxes | $ 500 | $ 482 | $ 422
Income tax expense at statutory rate | 105 | 101 | 89
State and local income taxes, net of federal benefit | 18 | 24 | 17
State tax rate changes | (18) | (25) | (3)
Other, net | (1) | 0 | 1
Income Tax Expense | $ 104 | $ 100 | $ 104
Effective income tax rate | 20.90% | 20.70% | 24.70%

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