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Acquisition and Divestiture - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Oct. 22, 2018
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Business Acquisition [Line Items]            
Cash purchase price       $ 0.0 $ 0.0 $ 79.0
Goodwill       $ 241.4 $ 290.4 $ 326.4
Discontinued Operations, Disposed of by Sale | Amega West            
Business Acquisition [Line Items]            
Total sale price     $ 20.0      
Cash received from divestiture   $ 2.4 $ 17.6      
LPW Technology Ltd            
Business Acquisition [Line Items]            
Cash purchase price $ 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