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EMPLOYEE RETIREMENT PLANS - Unrealized Loss Included in Accumulated Other Comprehensive (Loss) Income before Income Taxes (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Qualified |  |
Amounts in accumulated other comprehensive income (loss) before income taxes |  |
Net loss | $ 25 | $ 16
Net prior service cost | 2 | 2
Total | 27 | 18
Non-Qualified |  |
Amounts in accumulated other comprehensive income (loss) before income taxes |  |
Net loss | 26 | 24
Net prior service cost | 0 | 0
Total | $ 26 | $ 24

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