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Share-based Compensation (Stock Incentive Plan) (Details) - USD ($)
$ / shares in Units, shares in Millions
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for grant (in shares) 7.4    
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unearned compensation cost $ 0    
Granted, weighted average grant date fair value (in dollars per share) $ 58.76 $ 52.00 $ 47.65
Total fair value of shares vested $ 800,000 $ 1,500,000 $ 7,900,000
Restricted Stock | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Restricted Stock | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 5 years    
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unearned compensation cost $ 7,200,000    
Granted, weighted average grant date fair value (in dollars per share) $ 52.55 $ 47.26 $ 52.97
Total fair value of shares vested $ 13,000,000.0 $ 20,400,000 $ 200,000
Unearned compensation cost, weighted average period of recognition (in years) 1 year 9 months 18 days    
Stock Equivalent Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total intrinsic value of stock equivalent units converted to common stock $ 1,700,000 $ 100,000 $ 200,000
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Unearned compensation cost $ 4,800,000    
Granted, weighted average grant date fair value (in dollars per share) $ 12.26 $ 13.58 $ 9.35
Unearned compensation cost, weighted average period of recognition (in years) 1 year 6 months    
Award expiration period 10 years    
Exercised, total intrinsic value $ 1,700,000 $ 10,900,000 $ 15,200,000
Cash received from option exercises 4,400,000 19,100,000 37,900,000
Tax benefit realized from option exercises $ 400,000 $ 2,700,000 $ 5,900,000
Vesting Percent, Year One | Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 33.00%    
Vesting Percent, Year One | Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 33.00%    
Vesting Percent, Year Two | Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 33.00%    
Vesting Percent, Year Two | Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 33.00%    
Vesting Percent, Year Three | Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 33.00%    
Vesting Percent, Year Three | Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 33.00%