v3.19.2
Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Provision for income taxes $ 125.2 $ 133.1 $ 161.4
Effective income tax rate 20.60% 23.70% 33.10%
Excess tax benefit related to stock-based compensation awards $ 19.3 $ 40.9 $ 0.0
Net charges related to Tax Act $ (0.5) $ 15.4 $ 0.0
Provision for income taxes at U.S. statutory rate 21.00% 28.10% 35.00%
Transition tax for accumulated foreign earnings   $ 30.8  
Remeasurement of deferred tax liability   15.3  
Finalized income tax benefit on accumulated foreign earnings $ 0.5    
Income tax benefit foreign source earnings (GILTI and FDII) 1.8    
Accumulated earnings attributable to foreign subsidiaries 496.8    
Existing undistributed accumulated earnings of foreign subsidiary 221.7    
Existing undistributed accumulated earnings not reinvested outside the US 275.1    
Unremitted earnings 12.2 11.1  
Deferred tax asset valuation allowances 3.3 3.8  
Reserve for unrecognized tad positions 33.4 19.4 $ 13.4
Gross decrease for prior period tax positions 2.6 2.4 2.8
Accrued interest and penalties related to uncertain tax positions (0.1) 0.5 (0.2)
Total liability recognized $ 3.6 $ 3.7 $ 3.2
Increase in effective tax rate related to a more favorable mix of geographical income 0.20%    
Decrease in effective tax rate related to Federal research and development credits   (0.34%)  
Increase in Cumulative Discrete Tax Benefits   0.02%  
Increase in effective tax rate related to gross tax benefit   0.36%  
Decrease in additional US federal Tax Expense   (0.16%)  
Foreign      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Unremitted earnings $ 11.6    
Net operating loss carryforwards 9.5    
Foreign net operating loss carryforwards subject to expiration 1.5    
Foreign net operating loss carryforwards not subject to expiration 8.0    
State and Local      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Unremitted earnings 0.6    
Domestic      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Net operating loss carryforwards $ 18.6    
Earliest Tax Year | Foreign      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Expiration year of operating loss carryforwards Dec. 31, 2018    
Earliest Tax Year | Domestic      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Expiration year of operating loss carryforwards Dec. 31, 2018    
Latest Tax Year | Foreign      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Expiration year of operating loss carryforwards Dec. 31, 2027    
Latest Tax Year | Domestic      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Expiration year of operating loss carryforwards Dec. 31, 2030