Intangible Assets and Goodwill - Amortization of Intangible Assets (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 233,800,000	$ 246,800,000	$ 464,800,000	$ 498,500,000
Impairment of intangible assets	0	0	0	0
Amortization expense charged to cost of sales
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	3,200,000	2,600,000	5,900,000	4,500,000
Amortization expense charged to operating expense
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 230,600,000	$ 244,200,000	$ 458,900,000	$ 494,000,000.0