Retirement Benefits (Schedule Of Defined Benefit Plan Net Periodic Benefit Cost Combined U.S. and Significant Non-U.S. Plans) (Details) - Pension Benefits - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 8	$ 10
Interest cost	100	85
Expected return on plan assets	(202)	(208)
Recognized actuarial loss	39	52
Net periodic credit	(55)	(61)
United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	48	46
Expected return on plan assets	(84)	(82)
Recognized actuarial loss	19	23
Net periodic credit	(17)	(13)
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	8	10
Interest cost	52	39
Expected return on plan assets	(118)	(126)
Recognized actuarial loss	20	29
Net periodic credit	$ (38)	$ (48)