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Consolidated Statement Of Income (Loss) (Parenthetical) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Statement [Abstract] |  |  |
Pension and other postretirement benefit plan activity, tax (benefit) | $ 0 | $ (2) | $ (4)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax | $ 0 | $ 0 | $ 0

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