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Employee Benefit Plans (Employee Stock Purchase Plan) - Additional Information (Detail) - $ / shares shares in Millions | 12 Months Ended |
--- | --- | ---
Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013 | Apr. 02, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |  |
Threshold for employee stock purchases under ESPP, maximum value | 85.00% |  |  |
ESPP offering period (in years) | 2 years |  |  |
Increase in number of shares authorized for issuance under plan |  |  |  | 5.0
Shares issued | 1.7 | 1.8 | 2.1 |
Weighted average purchase price of stock purchased | $ 31.55 | $ 30.00 | $ 22.75 |
Shares reserved for future issuance under the ESPP | 5.3 |  |  |

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- Definition Number of shares issued during the period as a result of an employee stock purchase plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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