Property, Plant And Equipment (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Depreciation expense		$ (20,421)	$ (18,593)	$ (17,852)
Diluted earnings per share (in dollars per share)		$ (1.49)	$ (1.97)	$ 1.13
Copper Network Assets
Property, Plant and Equipment [Line Items]
Noncash pre-tax charge to abandon copper assets	$ 1,413
Software
Property, Plant and Equipment [Line Items]
Depreciation expense		$ (3,076)	$ (3,023)	$ (2,972)
Service Life [Member] | Fiber
Property, Plant and Equipment [Line Items]
Depreciation expense				$ 280
Diluted earnings per share (in dollars per share)				$ 0.03