Income And Other Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]
Balance at January 1	$ 3,935	$ 3,398	$ 9,130
Additions based on current year's tax positions	376	350	539
Additions for prior years' tax positions	103	400	294
Reductions for prior years' tax positions	(293)	(38)	(6,243)
Reductions due to lapse of the statute of limitations	(17)	(25)	(16)
Settlements with tax authorities	(13)	(153)	(277)
Foreign exchange effects/other	(56)	3	(29)
Balance at December 31	$ 4,035	$ 3,935	$ 3,398