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		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7	$ 6	$ 18	$ 21
Interest cost	151	95	449	294
Expected return on plan assets	(218)	(191)	(645)	(590)
Recognized actuarial loss	5	38	16	114
Net periodic benefit credit			(162)	(161)
Settlement loss			0	2
Net benefit credit	(55)	(52)	(162)	(159)
United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	65	48	195	145
Expected return on plan assets	(78)	(85)	(233)	(253)
Recognized actuarial loss	5	19	14	56
Net periodic benefit credit	(8)	(18)	(24)	(52)
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	6	18	21
Interest cost	86	47	254	149
Expected return on plan assets	(140)	(106)	(412)	(337)
Recognized actuarial loss	0	19	2	58
Net periodic benefit credit			(138)	(109)
Settlement loss			0	2
Net benefit credit	$ (47)	$ (34)	$ (138)	$ (107)