Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Goodwill [Roll Forward]
Beginning balance	$ 16.2	$ 28.7
Impairment charge		(7.8)
Effect of exchange rate changes	(0.4)	(4.7)
Ending balance	15.8	16.2
Americas [Member]
Goodwill [Roll Forward]
Beginning balance	0.0	10.9
Impairment charge		(7.8)
Effect of exchange rate changes	0.0	(3.1)
Ending balance	0.0	0.0
Accumulated impairment losses	31.6
Asia [Member]
Goodwill [Roll Forward]
Beginning balance	0.5	0.5
Impairment charge		0.0
Effect of exchange rate changes	0.0	0.0
Ending balance	0.5	0.5
Building HVAC [Member]
Goodwill [Roll Forward]
Beginning balance	15.7	17.3
Impairment charge		0.0
Effect of exchange rate changes	(0.4)	(1.6)
Ending balance	$ 15.3	15.7
Europe [Member]
Goodwill [Roll Forward]
Accumulated impairment losses		$ 8.7