Intangible Assets and Goodwill - Amortization of Intangible Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 246,600,000	$ 258,600,000	$ 745,100,000	$ 777,600,000
Impairment of intangible assets	0	0	0	500,000
Amortization expense charged to cost of sales
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	2,400,000	2,500,000	6,900,000	7,100,000
Amortization expense charged to operating expense
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 244,200,000	$ 256,100,000	$ 738,200,000	$ 770,500,000