May refer to a number of different types of wires or groups of wires capable of carrying voice or data transmissions.

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Telecommunications equipment that primarily performs the functions of establishing and releasing connections, and transporting network operations functions.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Land	$ 65	$ 67
Buildings	420	542
Leasehold and land improvements	1,651	1,598
Cable and wire	3,191	2,928
Network and switching equipment	2,241	2,717
Cell site equipment	3,492	4,381
Office furniture and equipment	242	272
Other operating assets and equipment	240	240
System development	2,267	2,214
Work in process	554	653
Total property, plant and equipment, gross	14,363	15,612
Accumulated depreciation and amortization	(9,369)	(10,550)
Property, plant and equipment, net	4,994	5,062
Depreciation and amortization expense	$ 891	$ 865	$ 882
Buildings \| Minimum
Property, Plant and Equipment [Line Items]
Useful life	15 years
Buildings \| Maximum
Property, Plant and Equipment [Line Items]
Useful life	40 years
Leasehold and land improvements \| Minimum
Property, Plant and Equipment [Line Items]
Useful life	1 year
Leasehold and land improvements \| Maximum
Property, Plant and Equipment [Line Items]
Useful life	30 years
Cable and wire \| Minimum
Property, Plant and Equipment [Line Items]
Useful life	15 years
Cable and wire \| Maximum
Property, Plant and Equipment [Line Items]
Useful life	40 years
Network and switching equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful life	1 year
Network and switching equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful life	10 years
Cell site equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful life	7 years
Cell site equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful life	30 years
Office furniture and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful life	3 years
Office furniture and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful life	10 years
Other operating assets and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful life	1 year
Other operating assets and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful life	12 years
System development \| Minimum
Property, Plant and Equipment [Line Items]
Useful life	1 year
System development \| Maximum
Property, Plant and Equipment [Line Items]
Useful life	7 years