Goodwill And Other Intangible Assets (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) reporting_unit	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Finite-Lived Intangible Assets [Line Items]
Asset impairments and abandonments and restructuring		$ 5,075	$ 1,193	$ 27,498
Goodwill, Impaired, Accumulated Impairment Loss		29,234
Communications
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment		$ 4,422
Number of reporting units | reporting_unit		3
Goodwill, Impaired, Accumulated Impairment Loss		$ 28,408	$ 23,986	23,986
Communications | Business Wireline
Finite-Lived Intangible Assets [Line Items]
Asset impairments and abandonments and restructuring	$ 4,422
Goodwill impairment		$ 4,422		13,478
Communications | Consumer Wireline
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment				10,508
Latin America Business Segment
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment				$ 826