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Business Segment Data - Financial Information Relating to Company's Business Segments (Parenthetical) (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 26, 2015 | Sep. 26, 2015 | Sep. 27, 2014 | Sep. 28, 2013
Segment Reporting [Abstract] |  |  |  |
Indefinite-lived intangible assets, impairment charge | $ 7,300,000 | $ 7,300,000 | $ 0 | $ 0
Goodwill impairment |  |  |  | 7,709,000
Charge related to new products |  |  | 16,900,000 | $ 11,200,000
Gain from sale of manufacturing plant assets |  |  | $ 4,900,000 |

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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2443-110228 + Details
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