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Business Segments and Geographic Information - Revenues by Geography (Detail)	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Schedule Of Geographical Segments [Line Items]
Revenues	100.00%	100.00%
United States
Schedule Of Geographical Segments [Line Items]
Revenues	75.50%	77.90%
Europe
Schedule Of Geographical Segments [Line Items]
Revenues	11.50%	10.70%
Asia-Pacific
Schedule Of Geographical Segments [Line Items]
Revenues	8.70%	8.40%
Rest of World
Schedule Of Geographical Segments [Line Items]
Revenues	4.30%	3.00%

X

- Definition

Percentage of revenues.

+ References

No definition available.

+ Details

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- Definition

Schedule Of Geographical Segments [Line Items]

+ References

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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