Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

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,
		2023		2022
		(Dollars in millions)
Property, plant and equipment:
Land	N/A	$	334	339
Fiber, conduit and other outside plant(1)	15-45 years	7,126		6,755
Central office and other network electronics(2)	7-10 years	5,488		5,283
Support assets(3)	3-30 years	2,845		2,766
Construction in progress(4)	N/A	1,146		747
Gross property, plant and equipment		16,939		15,890
Accumulated depreciation		(8,239)		(7,617)
Net property, plant and equipment		$	8,700	8,273

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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.