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Goodwill and Intangible Assets (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Mar. 31, 2015
Goodwill [Roll Forward]          
Goodwill, beginning balance     $ 16.2    
Effect of exchange rate changes     (0.1)    
Goodwill, ending balance $ 16.1   16.1    
Amortized intangible assets [Abstract]          
Gross Carrying Value 16.6   16.6   $ 16.8
Accumulated Amortization (8.0)   (8.0)   (6.9)
Net Intangible Assets 8.6   8.6   9.9
Amortization expense 0.4 $ 0.4 1.2 $ 1.2  
Estimated future amortization expense [Abstract]          
Remainder of 2016 0.4   0.4    
2017 1.6   1.6    
2018 1.6   1.6    
2019 1.5   1.5    
2020 1.4   1.4    
2021 & Beyond 2.1   2.1    
Asia [Member]          
Goodwill [Roll Forward]          
Goodwill, beginning balance     0.5    
Effect of exchange rate changes     0.0    
Goodwill, ending balance 0.5   0.5    
Building HVAC [Member]          
Goodwill [Roll Forward]          
Goodwill, beginning balance     15.7    
Effect of exchange rate changes     (0.1)    
Goodwill, ending balance 15.6   15.6    
Trade Names [Member]          
Amortized intangible assets [Abstract]          
Gross Carrying Value 8.9   8.9   9.1
Accumulated Amortization (6.2)   (6.2)   (5.8)
Net Intangible Assets 2.7   2.7   3.3
Acquired Technology [Member]          
Amortized intangible assets [Abstract]          
Gross Carrying Value 5.6   5.6   5.6
Accumulated Amortization (1.4)   (1.4)   (0.9)
Net Intangible Assets 4.2   4.2   4.7
Customer Relationships [Member]          
Amortized intangible assets [Abstract]          
Gross Carrying Value 2.1   2.1   2.1
Accumulated Amortization (0.4)   (0.4)   (0.2)
Net Intangible Assets $ 1.7   $ 1.7   $ 1.9