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Other Intangible Assets - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 26, 2015 | Sep. 26, 2015 | Sep. 27, 2014 | Sep. 28, 2013 | Jun. 28, 2014
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Indefinite-lived intangible assets, impairment charge | $ 7,300,000 | $ 7,300,000 | $ 0 | $ 0 |
Fair value of indefinite-lived intangible assets exceeds carrying value | 15,000,000 | 15,000,000 |  |  |
Amortization expense for intangibles |  | 4,300,000 | $ 4,300,000 | $ 5,100,000 |
Estimated annual amortization expense related to acquired intangible assets, 2016 | 4,000,000 | 4,000,000 |  |  |
Estimated annual amortization expense related to acquired intangible assets, 2017 | 4,000,000 | 4,000,000 |  |  |
Estimated annual amortization expense related to acquired intangible assets, 2018 | 4,000,000 | 4,000,000 |  |  |
Estimated annual amortization expense related to acquired intangible assets, 2019 | 4,000,000 | 4,000,000 |  |  |
Estimated annual amortization expense related to acquired intangible assets, 2020 | $ 4,000,000 | $ 4,000,000 |  |  |
Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted average remaining lives of acquired intangible assets |  | 1 year |  |  |
Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted average remaining lives of acquired intangible assets |  | 25 years |  |  |
Marketing-Related Intangible Assets [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted average remaining lives of acquired intangible assets |  | 6 years |  |  |
Marketing-Related Intangible Assets [Member] | Envincio, LLC [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets acquired |  |  |  |  | $ 1,700,000
Customer-Related Intangible Assets [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted average remaining lives of acquired intangible assets |  | 14 years |  |  |
Other Acquired Intangible Assets [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted average remaining lives of acquired intangible assets |  | 14 years |  |  |
Other Acquired Intangible Assets [Member] | Envincio, LLC [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets acquired |  |  |  |  | $ 9,800,000

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- Definition Indefinite Lived Intangible Assets Exceeds Carrying Value + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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