Contingencies (Details) (USD $) In Millions, unless otherwise specified		12 Months Ended
	Mar. 31, 2014 SST acquisition [Member]	Mar. 31, 2013 SST acquisition [Member] Unusual or Infrequent Item [Member]	Mar. 31, 2014 Indemnification agreement [Member]	Apr. 08, 2010 Pending Litigation [Member] SST acquisition [Member]
Loss contingencies [Line Items]
Loss contingencies, estimate of possible loss			$ 129	$ 13
Legal Fees		11.5
Loss Contingency Accrual, at Carrying Value	$ 5.7