Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2025

Property, Plant and Equipment [Abstract]

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


	Depreciable Lives	December 31,
		2025		2024
		(Dollars in millions)
Land	N/A	$	191	191
Fiber conduit and other outside plant (1)	15-45 years	4,983		4,563
Central office and other network electronics (2)	7-10 years	4,167		3,752
Support assets (3)	3-30 years	2,434		2,278
Construction-in-progress (4)	N/A	2,027		909
Gross property, plant and equipment		13,802		11,693
Accumulated depreciation		(4,772)		(4,139)
Net property, plant and equipment		$	9,030	7,554

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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, data centers, 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.

Schedule of change in asset retirement obligation

The following table provides asset retirement obligation activity:


	Years Ended December 31,
	2025		2024
	(Dollars in millions)
Balance at beginning of period	$	97	94
Accretion expense	6		6
Liabilities settled	(5)		(10)
Change in estimate	(3)		7

Balance at end of period	$	95	97

Level 3 Parent, LLC 10-K