Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,675,476	$ 4,390,000
Accumulated Amortization	(488,403)	(24,194)
Net	4,187,073	4,365,806
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,263,653	3,056,000
Accumulated Amortization	(276,682)	(13,064)
Net	2,986,971	3,042,936
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,261,285	1,188,000
Accumulated Amortization	(200,773)	(10,290)
Net	1,060,512	1,177,710
Tradenames and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	150,538	146,000
Accumulated Amortization	(10,948)	(840)
Net	$ 139,590	$ 145,160