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Other Comprehensive Earnings (loss) (Components Of Other Comprehensive Earnings (loss)) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pension and postretirement benefit plans:      
Beginning accumulated pension and postretirement benefits $ (132) $ (127) $ (119)
Net actuarial gain (loss) and prior service cost arising in current year 15 (35) (34)
Recognition of net actuarial loss and prior service cost in earnings [1] 6 3 7
Curtailment and settlement of pension benefits [2] 0 19 16
Other [3] 0 7 0
Income tax benefit (expense) (5) 1 3
Accumulated other comprehensive loss, net of tax $ (116) $ (132) $ (127)
[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 17 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.