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Other Comprehensive Earnings (Loss) (Components Of Other Comprehensive Earnings (Loss)) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Mar. 31, 2023 | Dec. 31, 2022
Pension and postretirement benefit plans: |  |  |  |  |  |  |  |  |
Beginning accumulated pension and postretirement benefits |  | $ (115) | $ (131) |  | $ (116) | $ (132) |  |  |
Recognition of net actuarial loss and prior service cost in earnings | [1] | 2 | 2 |  | 3 | 3 |  |  |
Income tax benefit (expense) |  | (1) | (1) | [1] | (1) | (1) | [1] |  |
Accumulated other comprehensive loss |  | $ (114) | $ (130) |  | $ (114) | $ (130) |  | $ (114) | $ (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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