Property, Plant and Equipment (Tables)

6 Months Ended

Sep. 30, 2018

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, 2018			March 31, 2018
	(in millions)
Land	$	247		$	254
Network equipment, site costs and related software	23,281			22,930
Buildings and improvements	825			813
Non-network internal use software, office equipment, leased devices and other	12,024			11,149
Construction in progress	3,576			2,202
Less: accumulated depreciation	(19,137		)	(17,423		)
Property, plant and equipment, net	$	20,816		$	19,925

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, 2018			March 31, 2018
	(in millions)
Leased devices	$	10,404		$	9,592
Less: accumulated depreciation	(4,220		)	(3,580		)
Leased devices, net	$	6,184		$	6,012