Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Amortized intangible assets [Abstract]
Gross Carrying Value	$ 16.8	$ 18.3
Accumulated Amortization	(6.9)	(5.9)
Net Intangible Assets	9.9us-gaap_FiniteLivedIntangibleAssetsNet	12.4us-gaap_FiniteLivedIntangibleAssetsNet
Amortization expense	1.6us-gaap_AmortizationOfIntangibleAssets	0.8us-gaap_AmortizationOfIntangibleAssets	0.7us-gaap_AmortizationOfIntangibleAssets
Future amortization expense for intangible assets [Abstract]
2016	1.6
2017	1.6
2018	1.6
2019	1.5
2020	1.4
2021 & Beyond	2.2
Trade Names [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	9.1	10.1
Accumulated Amortization	(5.8)	(5.7)
Net Intangible Assets	3.3	4.4
Acquired technology [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	5.6	5.8
Accumulated Amortization	(0.9)	(0.2)
Net Intangible Assets	4.7	5.6
Customer relationships [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	2.1	2.4
Accumulated Amortization	(0.2)	0
Net Intangible Assets	$ 1.9	$ 2.4

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next 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.

+ References