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Segment and Geographic Information, Capital Expenditures and Depreciation and Amortization Expense by Segment (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment and Geographic Information [Abstract]
Capital expenditures		$ 32.7	$ 71.3	$ 73.9
Depreciation and amortization		68.6	77.1	76.9
Operating Segments [Member] | BHVAC [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		1.5	3.1	1.3
Depreciation and amortization		3.1	3.4	3.5
Operating Segments [Member] | CIS [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		6.1	15.0	16.4
Depreciation and amortization		25.0	24.0	23.9
Operating Segments [Member] | HDE [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		13.5	31.5	29.4
Depreciation and amortization		25.5	25.4	26.3
Operating Segments [Member] | Automotive [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		11.1	19.1	24.9
Depreciation and amortization	[1]	13.2	22.3	21.2
Operating Segments [Member] | Corporate [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		0.5	2.6	1.9
Depreciation and amortization		$ 1.8	$ 2.0	$ 2.0
[1] Upon classifying the liquid- and air-cooled automotive businesses as held for sale, the Company ceased depreciating  the long-lived assets within the disposal groups.  See Note 2 for additional information.

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (e)
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

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-Section 45
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