Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2024

Property, Plant and Equipment [Abstract]

Schedule of net property, plant and equipment

Net property, plant and equipment is composed of the following:

	Depreciable Lives	As of December 31,
		2024		2023
		(Dollars in millions)
Property, plant and equipment:
Land	N/A	$	329	334
Fiber, conduit and other outside plant(1)	15-45 years	8,246		7,126
Central office and other network electronics(2)	7-10 years	5,792		5,488
Support assets(3)	3-30 years	2,878		2,845
Construction in progress(4)	N/A	530		1,146
Gross property, plant and equipment		17,775		16,939
Accumulated depreciation		(8,910)		(8,239)
Net property, plant and equipment		$	8,865	8,700

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(1)Fiber, conduit and other outside plant consists of fiber and metallic cable, conduit, poles and other supporting structures.

(2)Central office and other network electronics consists of circuit and packet switches, routers, transmission electronics and electronics providing service to customers.

(3)Support assets consist of buildings, computers and other administrative and support equipment.

(4)Construction in progress includes inventory held for construction and property of the aforementioned categories that has not been placed in service as it is still under construction.