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Business Combinations - Summary of Preliminary Purchase Price Allocation of Major Class of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Millions
Jun. 30, 2018
Jul. 01, 2017
Jul. 02, 2016
Business Acquisition [Line Items]      
Goodwill $ 740.5 $ 718.6 $ 674.0
2018 Acquisitions [Member]      
Business Acquisition [Line Items]      
Net working capital 24.9    
Goodwill 21.3    
Other intangible assets 24.7    
Property, plant and equipment 1.8    
Total purchase price $ 72.7