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Summary of Significant Accounting Policies - Schedule of Other Assets (Detail) - USD ($) $ in Millions | Sep. 24, 2016 | Sep. 26, 2015
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Accounting Policies [Abstract] |  |
Cash Surrender Value of Life Insurance | $ 36.0 | $ 27.5
Manufacturing access fees | 9.6 | 11.6
Cash Flow Hedge Derivative Instrument Assets at Fair Value | 0.4 | 6.2
Mutual funds | 0.0 | 5.6
Cost-method equity investments | 3.5 | 4.2
Deferred Tax Assets, Gross, Noncurrent | 9.3 | 0.0
Other | 23.9 | 17.9
Other assets | $ 83.7 | $ 88.2

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