Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Summary of Plant, Property and Equipment

The following table displays the details of Property, plant and equipment, which is stated at cost:

		(dollars in millions)
At December 31,	Lives (years)	2018			2017
Land	-	$	807		$	806
Buildings and equipment	7 to 45	30,468			28,914
Central office and other network equipment	3 to 50	147,250			145,093
Cable, poles and conduit	7 to 50	49,859			47,972
Leasehold improvements	5 to 20	8,580			8,394
Work in progress	-	6,362			6,139
Furniture, vehicles and other	3 to 20	9,509			9,180
		252,835			246,498
Less accumulated depreciation		(163,549		)	(157,930		)
Property, plant and equipment, net		$	89,286		$	88,568