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Common Stock and Share-based Compensation Plans (ESPP) (Details) - $ / shares
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for grant 8,700,000    
ESPP [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Purchase price, as a percent of fair market value of stock on either first or last trading day of offering period 85.00%    
Offering period frequency quarterly    
Number of shares authorized 1,500,000.0    
Number of shares available for grant 290,000    
Offering period 3 months    
Expected stock price volatility 37.00% 36.00% 35.00%
Shares issued under plan      
Shares issued 72,000 86,000 130,000
Average fair value $ 7.52 $ 7.59 $ 5.55
Average purchase price 39.95 40.30 29.50
Average market price $ 50.83 $ 48.36 $ 38.56