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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5	$ 7	$ 11	$ 15
Interest cost	150	99	298	199
Expected return on plan assets	(215)	(197)	(427)	(399)
Recognized actuarial loss	5	37	11	76
Net periodic benefit credit	(55)	(54)	(107)	(109)
Settlement loss	0	2	0	2
Net benefit credit	(55)	(52)	(107)	(107)
United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	65	49	130	97
Expected return on plan assets	(77)	(84)	(155)	(168)
Recognized actuarial loss	4	18	9	37
Net periodic benefit credit	(8)	(17)	(16)	(34)
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	7	11	15
Interest cost	85	50	168	102
Expected return on plan assets	(138)	(113)	(272)	(231)
Recognized actuarial loss	1	19	2	39
Net periodic benefit credit	(47)	(37)	(91)	(75)
Settlement loss	0	2	0	2
Net benefit credit	$ (47)	$ (35)	$ (91)	$ (73)