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Income Taxes - Reconciliation of Gross Unrecognized Tax Benefits (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 25, 2016
Jun. 27, 2015
Jun. 28, 2014
Income Tax Disclosure [Abstract]      
Beginning balance $ 11.6 $ 10.2 $ 8.2
Increase in unrecognized tax benefits related to current year tax positions 1.6 2.3 1.1
Increase in unrecognized tax benefits related to prior year tax positions 1.1 0.3 1.7
Decrease due to statute expiration (0.9) (1.2) (0.8)
Ending Balance $ 13.4 $ 11.6 $ 10.2