Goodwill - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
Sep. 03, 2014	Oct. 31, 2014	Jul. 26, 2013	Oct. 31, 2014	Oct. 25, 2013	Oct. 26, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Loss on assets held for sale	$ 49,500,000	$ 49,500,000		$ 49,472,000	$ 0	$ 0
Estimated net Loss against goodwill	22,500,000
Goodwill impairment			$ 3,500,000us-gaap_GoodwillImpairmentLoss	$ 0us-gaap_GoodwillImpairmentLoss	$ 3,454,000us-gaap_GoodwillImpairmentLoss	$ 52,169,000us-gaap_GoodwillImpairmentLoss

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: 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=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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-Section 45

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-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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