Property, Plant and Equipment (Tables)

6 Months Ended

Sep. 30, 2017

Property, Plant and Equipment [Line Items]

Schedule of Property, Plant and Equipment

The following table presents the components of property, plant and equipment and the related accumulated depreciation:

	September 30, 2017			March 31, 2017
	(in millions)
Land	$	259		$	260
Network equipment, site costs and related software	21,889			21,693
Buildings and improvements	806			818
Non-network internal use software, office equipment, leased devices and other	9,674			8,625
Construction in progress	2,408			2,316
Less: accumulated depreciation	(16,135		)	(14,503		)
Property, plant and equipment, net	$	18,901		$	19,209

Leased devices [Member]

Property, Plant and Equipment [Line Items]

Schedule of Property, Plant and Equipment

The following table presents leased devices and the related accumulated depreciation:

	September 30, 2017			March 31, 2017
	(in millions)
Leased devices	$	8,214		$	7,276
Less: accumulated depreciation	(3,505		)	(3,114		)
Leased devices, net	$	4,709		$	4,162