(Schedule Of Amounts Recognized In Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Non-current liability	$ (1,055)	$ (1,578)
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Non-current asset	0	0
Current liability	(20)	(28)
Non-current liability	(982)	(1,506)
Amounts recognized in the consolidated balance sheet	(1,002)	(1,534)
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Non-current asset	5	6
Current liability	(3)	(3)
Non-current liability	(76)	(73)
Amounts recognized in the consolidated balance sheet	$ (74)	$ (70)