Restructuring Charges - Activity and Liability Balances (Detail) (Restructuring Plan Two Thousand Thirteen and Two Thousand Eleven, USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Jan. 31, 2015	Oct. 31, 2014
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 23,801us-gaap_RestructuringReserve	$ 19,098us-gaap_RestructuringReserve
Charged to expense	908us-gaap_RestructuringCharges	34,645us-gaap_RestructuringCharges
Cash payments	(7,005)us-gaap_PaymentsForRestructuring	(29,942)us-gaap_PaymentsForRestructuring
Adjustments	(1,976)
Ending Balance	15,728us-gaap_RestructuringReserve	23,801us-gaap_RestructuringReserve
Workforce
Restructuring Reserve [Roll Forward]
Beginning Balance	11,510	12,159
Charged to expense	507	19,350
Cash payments	(5,037)	(19,999)
Adjustments	0
Ending Balance	6,980	11,510
Facility & Other
Restructuring Reserve [Roll Forward]
Beginning Balance	12,291	6,939
Charged to expense	401	15,295
Cash payments	(1,968)	(9,943)
Adjustments	(1,976)
Ending Balance	$ 8,748	$ 12,291

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

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Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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