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Share-Based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Jun. 30, 2014
item
Jun. 30, 2013
Jun. 30, 2012
Share-Based Compensation      
Number of share-based compensation plans 2    
Compensation cost $ 11.4 $ 13.1 $ 13.3
Stock options
     
Share-Based Compensation      
Compensation cost 3.5 3.4 3.1
Fair value assumptions      
Expected volatility (as a percent) 49.00% 55.00% 54.00%
Dividend yield (as a percent) 1.30% 1.50% 1.30%
Risk-free interest rate (as a percent) 1.40% 0.70% 1.40%
Expected term 5 years 5 years 5 years
Stock options | Minimum
     
Share-based compensation disclosures      
Options exercisable service period 1 year    
Stock options | Maximum
     
Share-based compensation disclosures      
Options exercisable service period 3 years    
Expiration term 10 years    
1993 Plan
     
Share-based compensation disclosures      
Shares available for grant 2,030,020    
Director's Plan
     
Share-Based Compensation      
Compensation cost $ 1.2 $ 1.2 $ 1.1
Share-based compensation disclosures      
Shares available for grant 752,532    
Options exercisable service period 1 year