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Share Capital, Option Plans and Share-Based Payments (Schedule of Weighted-Average Fair Value Of Options And Weighted-Average Assumptions Used) (Details) - $ / shares
3 Months Ended 6 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Weighted-average fair value of options granted (in dollars per share) $ 10.76 $ 12.94 $ 11.19 $ 13.84
Expected volatility 32.00% 32.00% 33.00% 32.00%
Risk–free interest rate 1.35% 1.34% 1.47% 1.45%
Expected dividend yield 1.70% 1.27% 1.64% 1.19%
Expected life (in years) 4 years 3 months 29 days 4 years 3 months 29 days 4 years 3 months 29 days 4 years 3 months 29 days
Forfeiture rate (based on historical rates) 5.00% 5.00% 5.00% 5.00%
Average exercised share price (in dollars per share) $ 45.35 $ 52.42 $ 45.69 $ 55.00