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Other Comprehensive Earnings (loss) (Components Of Other Comprehensive Earnings (loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Pension and postretirement benefit plans: |  |  |  |
Beginning accumulated pension and postretirement benefits |  | $ (116) | $ (132) | $ (127)
Net actuarial gain (loss) and prior service cost arising in current year |  | (15) | 15 | (35)
Recognition of net actuarial loss and prior service cost in earnings | [1] | 5 | 6 | 3
Settlement of pension benefits | [2] | 0 | 0 | 19
Other | [3] | 0 | 0 | 7
Income tax benefit (expense) |  | 2 | (5) | 1
Accumulated other comprehensive loss, net of tax |  | $ (124) | $ (116) | $ (132)
[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. See Note 16 for additional details.
[2] | In 2021, the Merger triggered settlement payments to certain plan participants, and the expense associated with this settlement is recognized as a component of restructuring and transaction costs in the accompanying consolidated statements of comprehensive earnings.
[3] | Other includes a remeasurement of the pension obligation due to the Merger, which was partially offset by a change in mortality assumption.

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