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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2019
Income Tax Disclosure [Abstract]          
Effective income tax rate 30.30% 25.80% 27.80% 31.90%  
Increase in income tax expense $ 10.6   $ 3.8    
Increase in repatriations from subsidiaries 16.8   14.9    
Increase in tax filings in excess of estimates 6.0   7.3    
Increase in net income taxed at foreign rates 3.3   11.8    
Decrease in reserves for unrecognized tax benefits 11.6   22.4    
Decrease in tax impact of internal reorganizations of subsidiaries 4.5   7.9    
Possible decrease in tax expense in next 12 months 7.1   7.1    
Provision for deferred income tax liabilities $ 19.3   $ 19.3   $ 17.4