Intangible Assets and Goodwill - Amortization of Intangible Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 258,600,000	$ 196,900,000	$ 777,600,000	$ 505,500,000
Impairment of intangible assets	0	0	500,000	3,100,000
Amortization expense charged to cost of sales
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	2,500,000	1,800,000	7,100,000	4,900,000
Amortization expense charged to operating expense
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 256,100,000	$ 195,100,000	$ 770,500,000	$ 500,600,000