Intangible Assets and Goodwill - Amortization of Intangible Assets (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 258,100,000	$ 173,800,000	$ 519,000,000.0	$ 308,600,000
Impairment of intangible assets	0	1,200,000	500,000	3,100,000
Amortization expense charged to cost of sales
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	2,400,000	2,100,000	4,600,000	3,100,000
Amortization expense charged to operating expense
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 255,700,000	$ 171,700,000	$ 514,400,000	$ 305,500,000