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Income Tax (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Income Tax [Abstract]          
Effective tax rate 36.40% 38.70% 33.60% 34.70%  
Unrecognized tax benefit $ 1.7   $ 1.7   $ 1.9
Changes in unrecognized tax benefits 0.0        
Unrecognized tax benefit utilized     0.3    
Accrued interest related to uncertain tax positions $ 0.1   $ 0.1