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Share-Based Compensation (Schedule of the Range of Assumptions Used to Estimate the Fair Value of Stock Options) (Details) - Stock Options
12 Months Ended
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rate (minimum) 2.10%
Expected volatility 25.00%
Expected life in years 7 years
Minimum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Dividend yield 2.70%
Maximum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Dividend yield 2.80%