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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) (USD $)
3 Months Ended 9 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Mar. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Weighted-average fair value of options granted (in dollars per share) $ 12.60 $ 9.04 $ 11.53 $ 8.58
Expected volatility 32.00% 36.00% 32.00% 37.00%
Risk–free interest rate 1.40% 0.76% 1.33% 0.67%
Expected dividend yield 1.20% 0.00% 1.30% 0.00%
Expected life (in years) 4 years 4 months 10 days 4 years 4 months 6 days 4 years 4 months 10 days 4 years 4 months 6 days
Forfeiture rate (based on historical rates) 5.00% 5.00% 5.00% 5.00%
Average exercised share price (in dollars per share) $ 50.08 $ 29.44 $ 46.43 $ 27.45