Pension And Other Postretirement Benefits (Benefit Obligations And Plan Assets Associated With Principal Benefit Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in benefit obligation
Medicare subsidy receipts	$ 10	$ 19
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (percent)	5.80%	5.30%
Long-term rate of compensation increase (percent)	4.00%	4.50%
Change in benefit obligation
Benefit obligation at January 1	$ 5,014	$ 5,211
Service cost	81	78	$ 138
Interest cost	250	276	216
Actuarial loss/(gain)	(81)	176
Benefits paid	(534)	(545)
Foreign exchange rate changes	(40)	11
Amendments, divestments and other	101	(193)
Benefit obligation at December 31	$ 4,791	$ 5,014	5,211
United States | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (percent)	5.70%	5.30%
Long-term rate of compensation increase (percent)	4.00%	4.50%
Change in benefit obligation
Benefit obligation at January 1	$ 13,143	$ 12,350
Service cost	499	466	712
Interest cost	671	664	518
Actuarial loss/(gain)	(441)	550
Benefits paid	(874)	(870)
Amendments, divestments and other	1	(17)
Benefit obligation at December 31	12,999	13,143	12,350
Accumulated benefit obligation at December 31	$ 11,227	$ 11,033
Pension Benefits - Non-U.S. [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate (percent)	4.60%	4.30%
Long-term rate of compensation increase (percent)	4.20%	4.50%
Change in benefit obligation
Benefit obligation at January 1	$ 21,327	$ 19,342
Service cost	338	323	570
Interest cost	823	922	614
Actuarial loss/(gain)	(658)	1,393
Benefits paid	(1,240)	(1,214)
Foreign exchange rate changes	(1,274)	515
Amendments, divestments and other	(118)	46
Benefit obligation at December 31	19,198	21,327	$ 19,342
Accumulated benefit obligation at December 31	$ 17,818	$ 19,769