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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
Mar. 30, 2019
Jun. 30, 2018
Business Acquisition [Line Items]    
Goodwill $ 747.5 $ 740.5
2019 Acquisitions [Member]    
Business Acquisition [Line Items]    
Net working capital 11.9  
Goodwill 7.2  
Other intangible assets 37.1  
Property, plant and equipment 1.9  
Total purchase price $ 58.1