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Income Taxes (Narrative) (Details) (USD $)
 12 Months Ended
Jun. 30, 2012
jurisdictions
Jun. 30, 2011
Jun. 30, 2012
Acquisition of Global 360 Holding Corp [Member]
Jun. 30, 2012
Domestic Country [Member]
Jun. 30, 2012
Foreign Country [Member]
Jul. 31, 2012
Paid Taxes [Member]
Non-capital loss carryforwards       $ 37,700,000 $ 116,800,000  
Non-capital loss carry forward not subject to expiration         106,300,000  
Investment tax credits 34,900,000          
Unrecognized tax benefits of deferred tax asset offset by valuation allowance 6,800,000          
Net unrecognized tax benefits excluding portion offset by valuation allowance 149,500,000 112,000,000        
Interest accrued 19,316,000 [1] 10,290,000 [1] 100,000      
Penalties accrued 4,040,000 [1] 15,771,000 [1] 0      
Increase (decrease) in gross unrecognized tax benefit in next 12 months (14,200,000)          
Most significant jurisdicitions (in jurisdictions) 4          
Years that remain open to examinations by local taxing authorities, maximum 10 years          
Accrued taxes on cash distribution 2,400,000          
Cash distribution repatriated from United States subsidiaries to Canadian parent 202,400,000          
Taxes paid on cash distribution           $ 2,400,000
[1] *These balances have been included within "Long-term income taxes payable" within the Consolidated Balance Sheets.