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, 2023	Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6	$ 8
Interest cost	148	100
Expected return on plan assets	(212)	(202)
Recognized actuarial loss	6	39
Net benefit credit	(52)	(55)
United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	65	48
Expected return on plan assets	(78)	(84)
Recognized actuarial loss	5	19
Net benefit credit	(8)	(17)
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	8
Interest cost	83	52
Expected return on plan assets	(134)	(118)
Recognized actuarial loss	1	20
Net benefit credit	$ (44)	$ (38)