Long-Term Borrowings (Details) In Millions, unless otherwise specified	12 Months Ended							12 Months Ended					12 Months Ended
	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2012 KRW	Jun. 30, 2012 Facility A [Member] KRW	Jun. 30, 2012 Facility A1 [Member] KRW	Jun. 30, 2012 Facility A2 [Member] KRW	Jun. 30, 2012 Facility B [Member] KRW	Jun. 30, 2012 First And Second Scheduled Repayment [Member] USD ($)	Jun. 30, 2012 Third Scheduled Principal Repayment [Member]	Jun. 30, 2012 Fourth Scheduled Principal Repayment [Member]	Jun. 30, 2012 Third And Fourth Scheduled Principal Repayment [Member] USD ($)	Jun. 30, 2012 Korean Senior Secured Loan Facility [Member] USD ($)	Jun. 30, 2012 Amortization Of Facility Fees [Member] USD ($)	Jun. 30, 2011 Amortization Of Facility Fees [Member] USD ($)
Debt Instrument [Line Items]
Secured loan facility	$ 115.9		130,500.0	130,500.0	65,500.0	65,000.0	65,000.0
Period length of senior secured loan facility, in years	5 years
Interest rate on credit facility	3.54%			4.10%			3.90%
Interest expense	8.8	7.5											0.4	2.0
Interest accrued	1.2
Final maturity period of credit facility, in months	54 months
Unscheduled principal payment	4.8
Scheduled principal repayment	7.0							14.3			14.0
Scheduled principal repayment of debt, due date									Oct. 29, 2012	Apr. 29, 2013
Long-term borrowings												$ 93.8