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Acquisitions - Pro Forma Adjustments Used to Arrive at Pro Forma Net Income (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 27, 2015 | Jun. 28, 2014
Business Combinations [Abstract] |  |
Buyer transaction costs | $ 4.3 | $ 4.8
Amortization of debt issuance costs | (0.3) | (1.0)
Interest expense | (1.2) | (4.9)
Intangible amortization | 14.6 | (78.1)
Income tax adjustment | (5.2) | 28.1
Total | $ 12.2 | $ (51.1)

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