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Reportable Segments, Geographic Information and Major Customers - Concentration of Risk (Details) - Customer Concentration Risk - Consolidated Net Sales | 12 Months Ended
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Sep. 29, 2018 | Sep. 30, 2017 | Oct. 01, 2016
General Electric Company (GE) |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of concentration risk | 12.30% | 12.20% | 11.10%
Micron Technology, Inc. (Micron) |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of concentration risk |  |  | 10.40%
ARRIS Group, Inc. (Arris) |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of concentration risk |  |  | 10.10%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 + Details
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