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Employee Benefit Plans (Employee Stock Purchase Plan) - Additional Information (Detail) - $ / shares shares in Millions | 12 Months Ended |
--- | --- | ---
Oct. 31, 2016 | Oct. 31, 2015 | Oct. 31, 2014 | Mar. 29, 2016
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 | 1.6 | 1.7 | 1.8 |
Weighted average purchase price of stock purchased | $ 37.77 | $ 31.55 | $ 30.00 |
Shares reserved for future issuance under the ESPP | 8.7 |  |  |

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