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Income Taxes Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Income Tax Disclosure [Abstract]    
Effective Income Tax Rate Reconciliation, Percent 16.40% 44.50%
Deferred tax remeasurement $ 0.5  
Discrete item impact on effective tax rate $ 0.3 $ 0.5
Expected effective tax rate 27.00%