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Employee Benefit Plans (Equity Compensation Plans) - Additional Information (Detail) - USD ($) $ in Millions |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 02, 2015 | Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013 | Oct. 31, 2012 | May. 23, 2005
Restricted Stock Units |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Aggregate restricted stock units outstanding |  |  | 3,928,000 | 3,947,000 | 3,983,000 | 3,920,000 |
Restricted Stock Units | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period, (in years) |  |  | 3 years |  |  |  |
Restricted Stock Units | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period, (in years) |  |  | 4 years |  |  |  |
Restricted Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Aggregate restricted stock units outstanding |  |  | 45,000 | 48,000 |  |  |
Stock Option |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares available for future grant | [1] |  | 11,883,000 | 12,155,000 | 8,472,000 | 7,352,000 |
2006 Employee Equity Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share based compensation arrangement for options contractual term (in years) |  |  | 7 years |  |  |  |
Vesting period, (in years) |  |  | 4 years |  |  |  |
Additional reserved for future issuance under the 2006 Employee Plan |  | 3,800,000 |  |  |  |  |
Shares available for future grant |  |  | 11,900,000 |  |  |  |
2006 Employee Equity Incentive Plan | Restricted Stock Units |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Aggregate restricted stock units outstanding |  |  | 3,900,000 |  |  |  |
2006 Employee Equity Incentive Plan | Stock Option |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Aggregate stock options outstanding |  |  | 6,600,000 |  |  |  |
2005 Directors Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Reserved for future issuance |  |  | 262,402 |  |  |  | 800,000
Restricted stock awards issued |  |  | 343,070 |  |  |  |
Aggregate grant date fair value of restricted stock awards |  |  | $ 10.5 |  |  |  |
2005 Directors Plan | Restricted Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period, (in years) |  |  | 3 years |  |  |  |
Aggregate restricted stock units outstanding |  |  | 44,823 |  |  |  |
2005 Directors Plan | Stock Option |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Aggregate stock options outstanding |  |  | 76,369 |  |  |  |
Aggregate stock options granted under 2005 director plan |  |  | 157,871 |  |  |  |
Fair value of option shares granted |  |  | $ 4.7 |  |  |  |
2005 Directors Plan | Stock Option | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period, (in years) |  |  | 3 years |  |  |  |
2005 Directors Plan | Stock Option | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period, (in years) |  |  | 4 years |  |  |  |
Other Assumed Stock Plans |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Assumed shares remaining outstanding |  |  | 600,000 |  |  |  |
[1] | Excluding shares reserved for future issuance under the 2005 Directors Plan.

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