Property, Plant and Equipment (Details) - USD ($) $ in Millions	Jun. 30, 2025	Mar. 31, 2025
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 1,342.0	$ 1,279.9
Less: accumulated depreciation	(916.1)	(889.4)
Net property, plant and equipment	425.9	390.5
Land
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	19.4	16.4
Buildings and improvements
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 277.3	257.7
Buildings and improvements | Minimum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	10 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	40 years
Machinery and equipment
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 890.7	843.7
Machinery and equipment | Minimum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	15 years
Office equipment
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 96.7	92.6
Office equipment | Minimum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	3 years
Office equipment | Maximum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	10 years
Construction in progress
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 57.9	$ 69.5