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Other Comprehensive Earnings (loss) (Components Of Other Comprehensive Earnings (loss)) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension and postretirement benefit plans:      
Beginning accumulated pension and postretirement benefits $ (124) $ (116) $ (132)
Net actuarial gain (loss) and prior service cost arising in current year (3) (15) 15
Recognition of net actuarial loss and prior service cost in earnings [1] 6 5 6
Income tax benefit (expense) (1) 2 (5)
Accumulated other comprehensive loss, net of tax $ (122) $ (124) $ (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. See Note 16 for additional details.