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Business Segments and Geographic Information - Revenues by Geography (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 01, 2017 | Mar. 26, 2016 | Apr. 01, 2017 | Mar. 26, 2016
Schedule Of Geographical Segments [Line Items] |  |  |  |
Revenues | 100.00% | 100.00% | 100.00% | 100.00%
United States |  |  |  |
Schedule Of Geographical Segments [Line Items] |  |  |  |
Revenues | 79.70% | 79.00% | 78.90% | 78.70%
Europe |  |  |  |
Schedule Of Geographical Segments [Line Items] |  |  |  |
Revenues | 9.70% | 10.40% | 10.10% | 10.20%
Asia-Pacific |  |  |  |
Schedule Of Geographical Segments [Line Items] |  |  |  |
Revenues | 6.50% | 7.40% | 7.40% | 7.60%
All others |  |  |  |
Schedule Of Geographical Segments [Line Items] |  |  |  |
Revenues | 4.10% | 3.20% | 3.60% | 3.50%

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- Definition Percentage of revenues. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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