Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Mar. 31, 2015
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 16.2
Effect of exchange rate changes	0.8
Ending balance	17.0
Amortized intangible assets [Abstract]
Gross Carrying Value	17.4		$ 16.8
Accumulated Amortization	(7.5)		(6.9)
Net Intangible Assets	9.9		9.9
Amortization expense	0.4	$ 0.4
Estimated future amortization expense [Abstract]
Remainder of 2016	1.2
2017	1.7
2018	1.7
2019	1.5
2020	1.4
2021 & Beyond	2.4
Asia [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	0.5
Effect of exchange rate changes	0.0
Ending balance	0.5
Building HVAC [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	15.7
Effect of exchange rate changes	0.8
Ending balance	16.5
Trade Names [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	9.5		9.1
Accumulated Amortization	(6.2)		(5.8)
Net Intangible Assets	3.3		3.3
Acquired Technology [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	5.7		5.6
Accumulated Amortization	(1.0)		(0.9)
Net Intangible Assets	4.7		4.7
Customer Relationships [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	2.2		2.1
Accumulated Amortization	(0.3)		(0.2)
Net Intangible Assets	$ 1.9		$ 1.9