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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% |

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