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Acquisitions (Details) - USD ($)
$ in Millions
9 Months Ended
Oct. 22, 2018
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2019
Business Acquisition [Line Items]        
Asset purchase price, net of cash acquired   $ 0.0 $ 79.0  
Goodwill   $ 325.1   $ 326.4
LPW Technology Ltd        
Business Acquisition [Line Items]        
Asset purchase price, net of cash acquired $ 79.0      
Accounts receivable 2.1      
Inventory 4.5      
Other current assets 0.5      
Property and equipment 11.9      
Identifiable intangible assets 11.4      
Goodwill 59.0      
Accounts payable 4.4      
Current liabilities 2.5      
Other liabilities $ 3.5