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Business Segments and Geographic Information - Revenues by Geography (Detail)	3 Months Ended
	Dec. 26, 2015	Dec. 27, 2014
Schedule Of Geographical Segments [Line Items]
Revenues	100.00%	100.00%
United States
Schedule Of Geographical Segments [Line Items]
Revenues	78.40%	74.00%
Europe
Schedule Of Geographical Segments [Line Items]
Revenues	10.00%	13.60%
Asia-Pacific
Schedule Of Geographical Segments [Line Items]
Revenues	7.90%	8.70%
All others
Schedule Of Geographical Segments [Line Items]
Revenues	3.70%	3.70%

X

- Definition

Percentage of revenues.

+ References

No definition available.

+ Details

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- Definition

Schedule Of Geographical Segments [Line Items]

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No definition available.

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- Details

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- Details

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X

- Details

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X

- Details

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