Other Comprehensive Earnings (Loss) (Components Of Other Comprehensive Earnings (Loss)) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Pension and postretirement benefit plans:
Beginning accumulated pension and postretirement benefits		$ (124)	$ (116)
Recognition of net actuarial loss and prior service cost in earnings	[1]	1	1
Accumulated other comprehensive loss, net of tax		$ (123)	$ (115)	$ (124)

[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.