The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Goodwill [Roll Forward]
Goodwill, Beginning Balance			$ 28.7us-gaap_Goodwill
Effect of exchange rate changes			(2.5)us-gaap_GoodwillTranslationAdjustments
Ending balance	26.2us-gaap_Goodwill		26.2us-gaap_Goodwill
Amortized intangible assets [Abstract]
Gross Carrying Value	17.4		17.4		18.3
Accumulated Amortization	(6.7)		(6.7)		(5.9)
Net Intangible Assets	10.7us-gaap_FiniteLivedIntangibleAssetsNet		10.7us-gaap_FiniteLivedIntangibleAssetsNet		12.4us-gaap_FiniteLivedIntangibleAssetsNet
Amortization Expense	0.4us-gaap_AmortizationOfIntangibleAssets	0.2us-gaap_AmortizationOfIntangibleAssets	1.2us-gaap_AmortizationOfIntangibleAssets	0.6us-gaap_AmortizationOfIntangibleAssets
Amortization expense, fiscal year maturity [Abstract]
Remainder of 2015	0.4		0.4
2016	1.6		1.6
2017	1.7		1.7
2018	1.7		1.7
2019	1.5		1.5
2020 & Beyond	3.8		3.8
Trade names [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	9.5		9.5		10.1
Accumulated Amortization	(5.8)		(5.8)		(5.7)
Net Intangible Assets	3.7		3.7		4.4
Acquired technology [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	5.7		5.7		5.8
Accumulated Amortization	(0.7)		(0.7)		(0.2)
Net Intangible Assets	5.0		5.0		5.6
Customer relationships [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	2.2		2.2		2.4
Accumulated Amortization	(0.2)		(0.2)		0
Net Intangible Assets	2.0		2.0		2.4
South America [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance			10.9
Effect of exchange rate changes			(1.6)
Ending balance	9.3		9.3
Asia [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance			0.5
Effect of exchange rate changes			0
Ending balance	0.5		0.5
Building HVAC [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance			17.3
Effect of exchange rate changes			(0.9)
Ending balance	$ 16.4		$ 16.4