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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |
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Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2019
Income Tax Disclosure [Abstract] |  |  |
Effective income tax rate | 23.70% | 45.10% |
Decrease in income tax expense | $ 6.8 |  |
Decrease in reserves for unrecognized tax benefits | 10.8 |  |
Decrease in tax impact of internal reorganizations of subsidiaries | 3.4 |  |
Decrease due to higher tax credits for research and development | 2.0 |  |
Increase in net income taxed at foreign rates | 8.5 |  |
Effect of U.S. tax reform, BEAT | 2.9 |  |
Possible decrease in tax expense in next 12 months | 8.1 |  |
Provision for deferred income tax liabilities | $ 17.6 |  | $ 17.4

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