Segment and Geographic Information, Property, Plant and Equipment by Geographical Area (Details) - USD ($) $ in Millions		Mar. 31, 2021	Mar. 31, 2020
Segment and Geographic Information [Abstract]
Property, plant and equipment	[1]	$ 269.9	$ 448.0
Reportable Geographical Components [Member] | United States [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		80.3	114.6
Reportable Geographical Components [Member] | Mexico [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		43.5	50.0
Reportable Geographical Components [Member] | China [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		31.3	56.8
Reportable Geographical Components [Member] | Italy [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		30.0	49.8
Reportable Geographical Components [Member] | Hungary [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		27.6	55.4
Reportable Geographical Components [Member] | Germany [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		1.8	27.0
Reportable Geographical Components [Member] | Austria [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		0.0	26.0
Reportable Geographical Components [Member] | Other [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		$ 55.4	$ 68.4

[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.