Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2025

Property, Plant and Equipment [Abstract]

Schedule of net property, plant and equipment

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

	Depreciable Lives	December 31,
		2025(5)		2024
		(Dollars in millions)
Property, plant and equipment:
Land	N/A	$	328	329
Fiber, conduit and other outside plant(1)	15-45 years	7,400		8,246
Central office and other network electronics(2)	7-10 years	5,487		5,792
Support assets(3)	3-30 years	2,902		2,878
Construction in progress(4)	N/A	239		530
Gross property, plant and equipment		16,356		17,775
Accumulated depreciation		(8,910)		(8,910)
Net property, plant and equipment		$	7,446	8,865

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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.

(5)These values exclude assets classified as held for sale as of December 31, 2025.