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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
Sep. 30, 2013
Sep. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Weighted-average fair value of options granted (in dollars per share) $ 15.51 $ 18.23
Expected volatility 32.00% 40.00%
Risk–free interest rate 1.19% 0.62%
Expected dividend yield 1.80% 0.00%
Expected life (in years) 4 years 4 months 10 days 4 years 4 months 6 days
Forfeiture rate (based on historical rates) 5.00% 5.00%
Average exercised share price (in dollars per share) $ 66.33 $ 54.52