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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Jun. 30, 2015
Income Tax Disclosure [Abstract]      
Decrease in gross unrecognized tax benefit in next 12 months $ 15.6    
Taxes paid on cash distribution $ 12.6   $ 12.1
Effective income tax rate 21.30% 21.20%  
Decrease of income tax expense $ 6.2    
Decrease in net income 5.4    
Decrease in unrecognized tax benefits with related interest and penalties 2.2    
Increase in valuation allowance, amount $ 1.3