Goodwill And Other Intangible Assets (Summary Of Changes In Carrying Amount Of Goodwill, By Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance - Net goodwill	$ 67,854
Ending Balance - Impairments	(29,234)
Ending balance - Net goodwill	63,432	$ 67,854
Communications
Goodwill [Roll Forward]
Beginning Balance - Goodwill	91,840	91,881
Beginning Balance - Impairments	(23,986)	(23,986)
Beginning balance - Net goodwill	67,854	67,895
Accumulated Impairment	(4,422)
Impairment		(41)
Ending Balance - Goodwill	91,840	91,840	$ 91,881
Ending Balance - Impairments	(28,408)	(23,986)	(23,986)
Ending balance - Net goodwill	63,432	67,854	67,895
Communications | Business Wireline
Goodwill [Roll Forward]
Accumulated Impairment	$ (4,422)		$ (13,478)
Goodwill | Communications
Goodwill [Roll Forward]
Impairment		$ (41)