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Organization and Summary of Significant Accounting Policies - Changes in Fair Value of Level 3 Financial Assets (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Fair Value Disclosures [Abstract]    
Beginning balance $ 19.8 $ 17.0
Net unrealized gain 0.9 2.8
Redemptions (4.9)  
Ending balance $ 15.8 $ 19.8