Other Financial Statement Details - Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 3,309.4		$ 3,309.4		$ 3,096.7
Less: accumulated depreciation and amortization	2,379.5		2,379.5		2,242.0
Total property, plant and equipment, net	929.9		929.9		854.7
Depreciation expense	64.9	$ 40.3	149.8	$ 120.4
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	82.5		82.5		83.2
Building and building improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	666.7		666.7		659.7
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	2,442.8		2,442.8		2,251.1
Projects in process
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 117.4		$ 117.4		$ 102.7