Property, Plant and Equipment - Schedule of Property, Plant, and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property, plant and equipment
Gross property, plant and equipment	$ 43,542	$ 41,076
Accumulated depreciation	(23,121)	(21,318)
Net property, plant and equipment	20,421	19,758
Land
Property, plant and equipment
Gross property, plant and equipment	630	646
Fiber, conduit and other outside plant
Property, plant and equipment
Gross property, plant and equipment	$ 17,348	15,217
Fiber, conduit and other outside plant | Minimum
Property, plant and equipment
Depreciable Lives	15 years
Fiber, conduit and other outside plant | Maximum
Property, plant and equipment
Depreciable Lives	45 years
Central office and other network electronics
Property, plant and equipment
Gross property, plant and equipment	$ 16,616	15,741
Central office and other network electronics | Minimum
Property, plant and equipment
Depreciable Lives	3 years
Central office and other network electronics | Maximum
Property, plant and equipment
Depreciable Lives	10 years
Support assets
Property, plant and equipment
Gross property, plant and equipment	$ 6,804	6,714
Support assets | Minimum
Property, plant and equipment
Depreciable Lives	3 years
Support assets | Maximum
Property, plant and equipment
Depreciable Lives	30 years
Construction in progress
Property, plant and equipment
Gross property, plant and equipment	$ 2,144	$ 2,758