Other Comprehensive Earnings (Loss) (Components Of Other Comprehensive Earnings (Loss)) (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021		Jun. 30, 2022	Jun. 30, 2021
Pension and postretirement benefit plans:
Beginning accumulated pension and postretirement benefits		$ (131)	$ (104)		$ (132)	$ (127)
Recognition of net actuarial loss and prior service cost in earnings	[1]	2	0		3	1
Settlement of pension benefits		0	3	[2]	0	18	[2]
Other		0	0		0	7	[3]
Income tax benefit (expense)		(1)	0		(1)	0
Accumulated other comprehensive loss, net of tax		$ (130)	$ (101)		$ (130)	$ (101)

[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.

[2] 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.