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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 $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options $ 2.0 $ 3.0 $ 5.4 $ 10.2
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options $ 0 $ 0.4 $ 0.8 $ 0.8
Weighted-average fair value of options granted (in dollars per share) $ 16.28 $ 17.99 $ 16.78 $ 17.71
Expected volatility 37.00% 41.00% 38.00% 41.00%
Risk-free interest rate 0.64% 0.74% 0.64% 0.79%
Expected dividend yield 0.00% 0.00% 0.00% 0.00%
Expected life (in years) 4 years 4 months 6 days 4 years 3 months 18 days 4 years 4 months 6 days 4 years 3 months 18 days
Forfeiture rate (based on historical rates) 5.00% 5.00% 5.00% 5.00%