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Profit Sharing 401(k) Plan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Defined Contribution Plan [Abstract]
Contributions made by company	$ 13.3	$ 13.4	$ 9.4

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- Details

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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