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Other Comprehensive Earnings (Loss) (Components Of Other Comprehensive Earnings (Loss)) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Pension and postretirement benefit plans: |  |  |  |  |
Beginning accumulated pension and postretirement benefits |  | $ (120) | $ (122) | $ (122) | $ (124)
Recognition of net actuarial loss and prior service cost in earnings | [1] | 1 | 1 | 4 | 4
Income tax expense |  | (0) | 0 | (1) | (1)
Ending accumulated pension and postretirement benefits |  | $ (119) | $ (121) | $ (119) | $ (121)
[1] | Recognition of net actuarial loss and prior service cost are included in the computation of net periodic benefit cost, which is a component of other, net in the accompanying consolidated statements of comprehensive earnings.

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