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Organization and Summary of Significant Accounting Policies - Schedule of Changes in Goodwill (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]    
Beginning balance $ 372.8 $ 206.8
Acquisition activity 0.0 166.0
Ending balance $ 372.8 $ 372.8