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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Income Taxes - Additional Information [Line Items]            
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent           28.10%
Toll Tax Charge for the Deemed Repatriation of Undistributed Foreign Earnings $ 71.2   $ 71.2      
Income Tax Charge (Benefit) to Adjust the Toll Tax Charge $ (6.8) $ 6.4 (9.7)      
Change in Permanent Reinvestment Assertion     $ 6.1      
Income Tax (Textual) [Abstract]            
Effective tax rate 11.00% 31.20% 20.10% 27.50%    
Scenario, Forecast [Member]            
Income Taxes - Additional Information [Line Items]            
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent         21.00%