Pension And Other Postretirement Benefits (Assets Recorded In Balance Sheet And Other Comprehensive Income) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Postretirement benefits reserves	$ (9,700)	$ (10,496)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance at December 31	(4,427)	(4,643)
Current liabilities	(283)	(288)
Postretirement benefits reserves	(4,144)	(4,355)
Total recorded	(4,427)	(4,643)
Net actuarial loss/(gain)	(1,421)	(1,453)
Prior service cost	(405)	(459)
Total recorded in accumulated other comprehensive income	(1,826)	(1,912)
United States
Defined Benefit Plan Disclosure [Line Items]
Balance at December 31	(1,755)	(1,776)
Total recorded	(1,755)	(1,776)
United States | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance at December 31	(1,755)	(1,776)
Other assets	2	0
Current liabilities	(213)	(201)
Postretirement benefits reserves	(1,544)	(1,575)
Total recorded	(1,755)	(1,776)
Net actuarial loss/(gain)	631	744
Prior service cost	(252)	(283)
Total recorded in accumulated other comprehensive income	379	461
Pension Benefits - Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance at December 31	(1,820)	(2,896)
Total recorded	(1,820)	(2,896)
Pension Benefits - Non-U.S. [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance at December 31	(1,820)	(2,896)
Other assets	2,399	1,895
Current liabilities	(207)	(225)
Postretirement benefits reserves	(4,012)	(4,566)
Total recorded	(1,820)	(2,896)
Net actuarial loss/(gain)	557	1,364
Prior service cost	420	401
Total recorded in accumulated other comprehensive income	$ 977	$ 1,765