Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Amortized intangible assets [Abstract]
Gross Carrying Value	$ 18.3	$ 13.1
Accumulated Amortization	(5.9)	(4.8)
Net Intangible Assets	12.4	8.3
Amortization expense	0.8	0.7	0.6
Future amortization expense for intangible assets [Abstract]
2015	1.6
2016	1.7
2017	1.7
2018	1.7
2019	1.6
2020 & Beyond	4.1
Tradenames [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	10.1	9.6
Accumulated Amortization	(5.7)	(4.7)
Net Intangible Assets	4.4	4.9
Acquired technology [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	5.8	3.5
Accumulated Amortization	(0.2)	(0.1)
Net Intangible Assets	5.6	3.4
Customer relationships [Member]
Amortized intangible assets [Abstract]
Gross Carrying Value	2.4	0
Accumulated Amortization	0	0
Net Intangible Assets	$ 2.4	$ 0