Goodwill and Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	12 Months Ended
Mar. 31, 2020 USD ($)
Goodwill [Line Items]
Balance at March 31, 2019
Acquisitions	4,360,648
Goodwill impairment	(561,164)
Effects of foreign currency	(4,159)
Balance at March 31, 2020	3,795,325
Software and Analytics [Member]
Goodwill [Line Items]
Balance at March 31, 2019
Acquisitions	1,901,116
Goodwill impairment	(126,839)
Effects of foreign currency	(4,159)
Balance at March 31, 2020	1,770,118
Network Solutions [Member]
Goodwill [Line Items]
Balance at March 31, 2019
Acquisitions	1,944,701
Goodwill impairment	(298,870)
Effects of foreign currency
Balance at March 31, 2020	1,645,831
Technolgy-Enabled Services [Member]
Goodwill [Line Items]
Balance at March 31, 2019
Acquisitions	514,831
Goodwill impairment	(135,455)
Effects of foreign currency
Balance at March 31, 2020	$ 379,376

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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