Significant Accounting Policies (Details) $ in Millions	12 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($) segment	Mar. 31, 2020 USD ($) reporting_unit	Mar. 31, 2020 USD ($) unit	Apr. 01, 2019 USD ($)	Mar. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Number of reporting units			2	2
Amount of distributor advances, included in accounts receivable	$ 149.6	$ 149.6	$ 149.6	$ 149.6		$ 170.7
Number of days requiring distributor to settle receivable balances (in days)	30 days
Number of operating segments | segment		2
Right-of-use assets	$ 119.5	$ 119.5	119.5	119.5
Current portion of lease liabilities	44.5	44.5	44.5	44.5
Non-current portion of lease liabilities	$ 94.7	$ 94.7	$ 94.7	$ 94.7
Accounting Standards Update 2016-02
Property, Plant and Equipment [Line Items]
Right-of-use assets					$ 124.6
Current portion of lease liabilities					39.4
Non-current portion of lease liabilities					$ 97.9
Minimum
Property, Plant and Equipment [Line Items]
Upgrade period	1 year
Product warranty	12 months
Useful life	1 year
Minimum | Building and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Minimum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Maximum
Property, Plant and Equipment [Line Items]
Upgrade period	3 years
Product warranty	24 months
Useful life	15 years
Maximum | Building and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Maximum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years