Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Goodwill [Roll Forward]
Beginning balance	$ 166.1	$ 168.5
Impairment charge		(0.5)
Effect of exchange rate changes	4.6	(1.9)
Ending balance	170.7	166.1
BHVAC [Member]
Goodwill [Roll Forward]
Beginning balance	13.5	14.1
Impairment charge		0.0
Effect of exchange rate changes	1.3	(0.6)
Ending balance	14.8	13.5
CIS [Member]
Goodwill [Roll Forward]
Beginning balance	152.6	153.9
Impairment charge		0.0
Effect of exchange rate changes	3.3	(1.3)
Ending balance	155.9	152.6
Automotive [Member]
Goodwill [Roll Forward]
Beginning balance	0.0	0.5
Impairment charge		(0.5)
Effect of exchange rate changes	0.0	0.0
Ending balance	0.0	0.0
Accumulated impairment losses	9.2	9.2
HDE [Member]
Goodwill [Roll Forward]
Accumulated impairment losses	$ 31.6	$ 31.6