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INCOME TAXES - EFFECTIVE INCOME TAX RECONCILIATION (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Business Acquisition [Line Items] |  |  |
U.S. federal tax rate | 21.00% | 35.00% | 35.00%
Income before income tax | $ 323 | $ 79 | $ 629
Expected tax expense | 68 | 17 | 132
Nondeductible expenses | 14 | 11 | 10
State income taxes | 17 | 5 | 20
Valuation allowance | (1) | (4) | 1
Tax credits | (3) | (5) | (2)
FIN48 reserve | (5) | (1) | 3
Tax law changes | 0 | 0 | (14)
Effective Income Tax Rate Reconciliation State and Local Income Sourcing, Amount | (5) | (2) | 0
Other—net | 3 | 0 | 1
Income tax expense | $ 88 | $ 21 | $ 151
Effective tax rate | 27.10% | 26.20% | 24.00%

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