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Consolidated Statement of Income (Loss) and Comprehensive Income (Parenthetical) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Income Statement [Abstract] |  |
Pension and other postretirement benefit plan activity, tax | $ 0 | $ 0
Unrealized net loss on derivative hedging instruments, tax | $ 0 | $ 0

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