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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, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Pension and postretirement benefit plans: |  |  |  |  |  |
Beginning accumulated pension and postretirement benefits |  | $ (114) | $ (130) | $ (116) | $ (132) |
Recognition of net actuarial loss and prior service cost in earnings | [1] | 1 | 1 | 4 | 4 |
Income tax expense |  | 0 | 0 | (1) | (1) |
Accumulated other comprehensive loss, net of tax |  | $ (113) | $ (129) | $ (113) | $ (129) | $ (116)
[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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