Property, Plant, and Equipment (Tables)

9 Months Ended

Sep. 30, 2021

Property, Plant and Equipment [Abstract]

Schedule of Net Property, Plant and Equipment

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

	September 30, 2021		December 31, 2020
	(Dollars in millions)
Land	$	751	848
Fiber, conduit and other outside plant(1)	18,500		26,522
Central office and other network electronics(2)	15,265		20,692
Support assets(3)	7,147		8,261
Construction in progress(4)	1,290		1,611
Gross property, plant and equipment	42,953		57,934
Accumulated depreciation	(22,027)		(31,596)
Net property, plant and equipment	$	20,926	26,338

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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, cable landing stations, 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.