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, 2024	Mar. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6	$ 6
Interest cost	144	148
Expected return on plan assets	(219)	(212)
Recognized actuarial loss	8	6
Net benefit credit	(61)	(52)
United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	62	65
Expected return on plan assets	(76)	(78)
Recognized actuarial loss	5	5
Net benefit credit	(9)	(8)
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	6
Interest cost	82	83
Expected return on plan assets	(143)	(134)
Recognized actuarial loss	3	1
Net benefit credit	$ (52)	$ (44)