Property, Plant and Equipment (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 943.4	$ 1,302.4
Less: accumulated depreciation		(673.5)	(854.4)
Net property, plant and equipment	[1]	269.9	448.0
Depreciation expense		60.1	68.2	$ 67.9
Loss from disposition of property, plant and equipment		(0.7)	(0.6)	$ (0.9)
Land [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		16.4	19.7
Buildings and Improvements [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 203.5	276.7
Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		10 years
Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		40 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 623.2	870.3
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		15 years
Office Equipment [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 81.3	95.2
Office Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		3 years
Office Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		10 years
Construction in Progress [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 19.0	$ 40.5

[1] In connection with the pending sales of the liquid- and air-cooled automotive businesses within the Automotive segment, the Company wrote-down the carrying value of the disposal groups’ property, plant and equipment to zero as of March 31, 2021.  The assets impaired were located in Hungary, Germany, Austria, China, the U.S., Italy, and the Netherlands.  See Note 2 for additional information on the held for sale businesses and impairment charges recorded during fiscal 2021.