Acquisitions Acquisitions - Hu-Friedy (Details) - USD ($)		3 Months Ended
	Oct. 01, 2019	Oct. 31, 2019	Oct. 31, 2018	Jul. 31, 2019
Business Acquisition [Line Items]
Cash consideration		$ 658,932,000	$ 17,000,000
Contingent consideration		35,100,000		$ 0
Hu-Friedy
Business Acquisition [Line Items]
Total consideration	$ 718,933,000	754,033,000
Cash consideration	658,933,000
Stock consideration	60,000,000	$ 60,000,000
Contingent consideration	35,100,000
Minimum | Hu-Friedy
Business Acquisition [Line Items]
Contingent consideration	0
Maximum | Hu-Friedy
Business Acquisition [Line Items]
Contingent consideration	$ 50,000,000