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Share Capital, Option Plans, and Share-Based Payments (Summary of Information Regarding Stock Options Outstanding) (Details) - $ / shares
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Number of options Outstanding as of June 30, 2016 (in shares) 4,177,408 4,375,365 4,273,226
Weighted Average Remaining Contractual Life (years) 4 years 6 months 23 days 4 years 11 months 16 days  
Weighted Average Exercise Price (in dollars per share) $ 43.87 $ 42.26 $ 36.35
Number of options Exercisable as of June 30, 2016 (in shares) 1,607,188 1,309,484  
Weighted Average Exercise Price (in dollars per share) $ 36.03 $ 32.32  
Stock Options Exercise Price Range One      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 18.67    
Exercise price, upper limit (in dollars per share) $ 26.37    
Number of options Outstanding as of June 30, 2016 (in shares) 412,823    
Weighted Average Remaining Contractual Life (years) 2 years 5 months 7 days    
Weighted Average Exercise Price (in dollars per share) $ 24.80    
Number of options Exercisable as of June 30, 2016 (in shares) 383,488    
Weighted Average Exercise Price (in dollars per share) $ 24.68    
Stock Options Exercise Price Range Two      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 27.26    
Exercise price, upper limit (in dollars per share) $ 29.64    
Number of options Outstanding as of June 30, 2016 (in shares) 130,000    
Weighted Average Remaining Contractual Life (years) 3 years 4 months 28 days    
Weighted Average Exercise Price (in dollars per share) $ 28.47    
Number of options Exercisable as of June 30, 2016 (in shares) 87,500    
Weighted Average Exercise Price (in dollars per share) $ 28.51    
Stock Options Exercise Price Range Three      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 30.18    
Exercise price, upper limit (in dollars per share) $ 30.19    
Number of options Outstanding as of June 30, 2016 (in shares) 665,123    
Weighted Average Remaining Contractual Life (years) 2 years 7 months 6 days    
Weighted Average Exercise Price (in dollars per share) $ 30.18    
Number of options Exercisable as of June 30, 2016 (in shares) 505,123    
Weighted Average Exercise Price (in dollars per share) $ 30.18    
Stock Options Exercise Price Range Four      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 31.76    
Exercise price, upper limit (in dollars per share) $ 45.73    
Number of options Outstanding as of June 30, 2016 (in shares) 563,132    
Weighted Average Remaining Contractual Life (years) 5 years 4 months 20 days    
Weighted Average Exercise Price (in dollars per share) $ 41.35    
Number of options Exercisable as of June 30, 2016 (in shares) 90,836    
Weighted Average Exercise Price (in dollars per share) $ 32.96    
Stock Options Exercise Price Range Five      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 47.01    
Exercise price, upper limit (in dollars per share) $ 49.04    
Number of options Outstanding as of June 30, 2016 (in shares) 256,680    
Weighted Average Remaining Contractual Life (years) 6 years 2 months 12 days    
Weighted Average Exercise Price (in dollars per share) $ 47.48    
Number of options Exercisable as of June 30, 2016 (in shares) 28,750    
Weighted Average Exercise Price (in dollars per share) $ 49.04    
Stock Options Exercise Price Range Six      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 50.08    
Exercise price, upper limit (in dollars per share) $ 50.09    
Number of options Outstanding as of June 30, 2016 (in shares) 816,250    
Weighted Average Remaining Contractual Life (years) 4 years 7 months    
Weighted Average Exercise Price (in dollars per share) $ 50.08    
Number of options Exercisable as of June 30, 2016 (in shares) 366,250    
Weighted Average Exercise Price (in dollars per share) $ 50.08    
Stock Options Exercise Price Range Seven      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 51.16    
Exercise price, upper limit (in dollars per share) $ 54.17    
Number of options Outstanding as of June 30, 2016 (in shares) 790,500    
Weighted Average Remaining Contractual Life (years) 5 years 6 months 9 days    
Weighted Average Exercise Price (in dollars per share) $ 53.65    
Number of options Exercisable as of June 30, 2016 (in shares) 47,625    
Weighted Average Exercise Price (in dollars per share) $ 52.03    
Stock Options Exercise Price Range Eight      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 55.12    
Exercise price, upper limit (in dollars per share) $ 55.65    
Number of options Outstanding as of June 30, 2016 (in shares) 226,570    
Weighted Average Remaining Contractual Life (years) 5 years 3 months 9 days    
Weighted Average Exercise Price (in dollars per share) $ 55.50    
Number of options Exercisable as of June 30, 2016 (in shares) 56,658    
Weighted Average Exercise Price (in dollars per share) $ 55.50    
Stock Options Exercise Price Range Nine      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 55.99    
Exercise price, upper limit (in dollars per share) $ 56.00    
Number of options Outstanding as of June 30, 2016 (in shares) 152,500    
Weighted Average Remaining Contractual Life (years) 6 years 10 months    
Weighted Average Exercise Price (in dollars per share) $ 55.99    
Number of options Exercisable as of June 30, 2016 (in shares) 0    
Weighted Average Exercise Price (in dollars per share) $ 0.00    
Stock Options Exercise Price Range Ten      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 57.29    
Exercise price, upper limit (in dollars per share) $ 57.30    
Number of options Outstanding as of June 30, 2016 (in shares) 163,830    
Weighted Average Remaining Contractual Life (years) 5 years 2 months 9 days    
Weighted Average Exercise Price (in dollars per share) $ 57.29    
Number of options Exercisable as of June 30, 2016 (in shares) 40,958    
Weighted Average Exercise Price (in dollars per share) $ 57.29    
Stock Options Exercise Price Range Eleven      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Exercise price, lower limit (in dollars per share) 18.67    
Exercise price, upper limit (in dollars per share) $ 57.30    
Number of options Outstanding as of June 30, 2016 (in shares) 4,177,408    
Weighted Average Remaining Contractual Life (years) 4 years 6 months 23 days    
Weighted Average Exercise Price (in dollars per share) $ 43.87    
Number of options Exercisable as of June 30, 2016 (in shares) 1,607,188    
Weighted Average Exercise Price (in dollars per share) $ 36.03