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Acquisitions - Hu-Friedy (Details) - USD ($)
9 Months Ended
Oct. 01, 2019
Apr. 30, 2020
Apr. 30, 2019
Business Acquisition [Line Items]      
Cash consideration   $ 721,350,000 $ 40,644,000
Hu-Friedy      
Business Acquisition [Line Items]      
Consideration, excluding contingent consideration $ 716,542,000    
Cash consideration 662,151,000    
Stock consideration 54,391,000    
Contingent consideration 38,371,000 $ 0  
Minimum | Hu-Friedy      
Business Acquisition [Line Items]      
Contingent consideration 0    
Maximum | Hu-Friedy      
Business Acquisition [Line Items]      
Contingent consideration $ 50,000,000