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Employee Benefit Plans - Stock Options and Restricted Stock Units Under all Equity Plans (Except 2005 Director's Plan) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013 | Oct. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |  |  |  |
Weighted- Average Exercise Price per Share, Options Exercised |  | $ 26.06 | $ 24.47 | $ 24.34 |
Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Available for Grant, Beginning Balance | [1] | 12,155 | 8,472 | 7,352 |
Available for Grant, Options Granted | [1] | (1,908) | (1,686) | (1,704) |
Available for Grant, Options Canceled/forfeited/expired | [1] | 230 | 163 | 159 |
Available for Grant, Restricted stock units granted | [1],[2] | (2,707) | (2,468) | (2,519) |
Available for Grant, Restricted stock units forfeited | [1],[2] | 313 | 174 | 184 |
Available for Grant, Additional shares reserved | [1] | 3,800 | 7,500 | 5,000 |
Available for Grants, Ending balance | [1] | 11,883 | 12,155 | 8,472 | 7,352
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |
Options Outstanding, Options Granted |  | 1,942 | 1,686 | 1,704 |
Options Outstanding, Options Assumed | [3] | 133 | 843 | 158 |
Options Outstanding, Options Exercised |  | (2,125) | (2,103) | (4,173) |
Options Outstanding, Options Canceled/forfeited/expired |  | (411) | (402) | (182) |
Options Outstanding, Vested and expected to vest |  | 7,192 |  |  |
Options Outstanding, Exercisable |  | 3,673 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |  |  |  |
Weighted- Average Exercise Price per Share, Beginning Balance |  | $ 29.81 | $ 26.87 | $ 24.64 |
Weighted- Average Exercise Price per Share, Options Granted |  | 45.14 | 38.65 | 34.10 |
Weighted- Average Exercise Price per Share, Options Assumed | [3] | 38.97 | 24.63 | 23.60 |
Weighted- Average Exercise Price per Share, Options Exercised |  | 26.06 | 24.47 | 24.34 |
Weighted- Average Exercise Price per Share, Options Canceled/forfeited/expired |  | 33.51 | 27.44 | 24.17 |
Weighted- Average Exercise Price per Share, Ending Balance |  | 34.94 | $ 29.81 | $ 26.87 | $ 24.64
Weighted- Average Exercise Price per Share, Vested and expected to vest |  | 34.84 |  |  |
Weighted- Average Exercise Price per Share, Exercisable |  | $ 29.80 |  |  |
Weighted Average Remaining Contractual Life, options outstanding |  | 4 years 8 months 1 day | 4 years 7 months 28 days | 4 years 3 months 18 days | 3 years 8 months 16 days
Weighted-Average Remaining Contractual Life , Vested and expected to vest |  | 4 years 7 months 24 days |  |  |
Weighted-Average Remaining Contractual Life , Exercisable |  | 3 years 7 months 6 days |  |  |
Aggregate Intrinsic Value, Beginning Balance |  | $ 86,537 | $ 71,700 | $ 80,950 |
Aggregate Intrinsic Value, Ending Balance |  | 109,627 | $ 86,537 | $ 71,700 | $ 80,950
Aggregate Intrinsic Value, Vested and expected to vest |  | 108,887 |  |  |
Aggregate Intrinsic Value, Exercisable |  | $ 74,121 |  |  |
Stock Option | All Stock Plans |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |
Options Outstanding, Beginning Balance |  | 7,750 | 7,726 | 10,219 |
Options Outstanding, Ending Balance |  | 7,289 | 7,750 | 7,726 | 10,219
[1] | Excluding shares reserved for future issuance under the 2005 Directors Plan.
[2] | These amounts do not reflect the actual number of restricted stock units granted or forfeited but rather the effect on the total remaining shares available for future grants after the application of the share reserve ratio. For more information about the share reserve ratio, please see Restricted Stock Units above.
[3] | The Company assumed options outstanding under various plans through acquisitions.

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