(Components Of Postretirement Benefit Expense) (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0
Interest cost	5	7	8
Actuarial loss (gain)	5	5	4
Amortization of prior service credits	0	(1)	(2)
Net periodic pension (income) expense	10	11	10
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	1
Interest cost	1	2	1
Actuarial loss (gain)	1	1	2
Amortization of prior service credits	(2)	(2)	(3)
Net periodic pension (income) expense	$ 0	$ 1	$ 1