Income And Other Taxes (Deferred Income Taxes Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Income And Other Taxes [Abstract]
Property, plant and equipment	$ 40,881	$ 26,627
Other liabilities	8,113	7,534
Total deferred tax liabilities	48,994	34,161
Pension and other postretirement benefits	(1,365)	(1,777)
Asset retirement obligations	(3,156)	(3,532)
Tax loss carryforwards	(4,575)	(4,317)
Other assets	(7,308)	(6,361)
Total deferred tax assets	(16,404)	(15,987)
Asset valuation allowances	2,516	2,641
Net deferred tax liabilities	$ 35,106	$ 20,815