Foreign Exchange Forward Contracts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Derivative [Line Items]
Foreign currency transaction realized gains (losses)	$ (1.5)	$ (0.9)	$ 2.5
Foreign currency transaction realized gain from liquidation of Japanese subsidiary		1.9
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional principal amount of forward foreign currency contracts	$ 7.6
Not Designated as Hedging Instrument | Forward Contracts
Derivative [Line Items]
Maximum maturities for contracts (in days)	60 days