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Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Jun. 24, 2017
Jun. 25, 2016
Jun. 27, 2015
Numerator:      
Net income $ 48.8 $ 72.2 $ 110.4
Denominator:      
Shares, basic 34.8 36.6 36.9
Effect of dilutive share-based awards 0.8 1.3 2.0
Shares, diluted 35.6 37.9 38.9
Net income per share:      
Basic $ 1.40 $ 1.97 $ 2.99
Diluted $ 1.37 $ 1.91 $ 2.84