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Stock Plans - Narrative (Details) |  | 1 Months Ended | 12 Months Ended
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Mar. 18, 2019 USD ($) shares | Mar. 31, 2020 USD ($) director shares | Mar. 31, 2016 director shares | Oct. 31, 2021 USD ($) $ / shares shares | Oct. 31, 2020 USD ($) $ / shares shares | Oct. 31, 2019 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total unrecognized compensation cost related to nonvested options |  |  |  | $ 21,000,000 |  |
Share-based compensation expense |  |  |  | $ 44,700,000 | $ 38,600,000 | $ 36,300,000
Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Options granted in period (in shares) | shares |  |  |  | 109,440 |  |
Total unrecognized compensation cost expected to be recognized over a remaining weighted-average vesting period |  |  |  | 2 years 8 months 12 days |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total unrecognized compensation cost expected to be recognized over a remaining weighted-average vesting period |  |  |  | 2 years 9 months 18 days |  |
Total unrecognized compensation cost related to nonvested units |  |  |  | $ 63,100,000 |  |
Performance Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  |  | 3 years |  |
Total unrecognized compensation cost expected to be recognized over a remaining weighted-average vesting period |  |  |  | 2 years 3 months 18 days |  |
Total unrecognized compensation cost related to nonvested units |  |  |  | $ 10,200,000 |  |
Performance Units | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Target percentage of shares earned |  |  |  | 0.00% |  |
Performance Units | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Target percentage of shares earned |  |  |  | 200.00% |  |
2020 Directors Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of non-employee directors in committee | director |  | 2 |  |  |  |
Number of shares authorized to be granted | shares |  | 50,000 |  |  |  |
Shares remaining for future grant (in shares) | shares |  |  |  | 37,853 |  |
Options granted in period (in shares) | shares |  |  |  | 0 |  |
2020 Directors Plan | Employee Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Exercise price percentage of fair market value on date of grant of awards |  | 100.00% |  |  |  |
Award expiration date (no more than) |  | 10 years |  |  |  |
2020 Directors Plan | Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award expiration date (no more than) |  |  |  | 10 years |  |
Award vesting period |  |  |  | 1 year |  |
2020 Directors Plan | Restricted Stock Units (RSUs) |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  |  | 1 year |  |
Third Amended and Restated 2007 Long-Term Incentive Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of non-employee directors in committee | director |  |  | 2 |  |  |
Number of shares authorized to be granted | shares |  |  | 6,930,000 |  |  |
Shares remaining for future grant (in shares) | shares |  |  |  | 908,753 |  |
Third Amended and Restated 2007 Long-Term Incentive Plan | Employee Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Exercise price percentage of fair market value on date of grant of awards |  |  |  | 100.00% |  |
Award expiration date (no more than) |  |  |  | 10 years |  |
Third Amended and Restated 2007 Long-Term Incentive Plan | Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award expiration date (no more than) |  |  |  | 10 years |  |
Weighted-average fair value of each option granted (in dollars per share) | $ / shares |  |  |  | $ 84.10 | $ 70.45 | $ 60.71
Total intrinsic value of options exercised |  |  |  | $ 64,700,000 | $ 22,600,000 | $ 40,100,000
Third Amended and Restated 2007 Long-Term Incentive Plan | Stock Options | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  |  | 3 years |  |
Third Amended and Restated 2007 Long-Term Incentive Plan | Stock Options | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  |  | 5 years |  |
Third Amended and Restated 2007 Long-Term Incentive Plan | Restricted Stock Units (RSUs) | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  |  | 3 years |  |
Third Amended and Restated 2007 Long-Term Incentive Plan | Restricted Stock Units (RSUs) | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  |  | 5 years |  |
Employee Stock Purchase Plan | Employee Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares authorized to be granted | shares | 1,000,000 |  |  |  |  |
Exercise price percentage of fair market value on date of grant of awards | 85.00% |  |  |  |  |
Percentage of employees maximum eligible compensation for purchase of awards | 15.00% |  |  |  |  |
Amount of employees maximum eligible compensation for purchase of awards | $ 21,300 |  |  |  |  |
Number of shares issued to employees | shares |  |  |  | 17,575 | 11,641 |
Number of shares remaining available for future issuance | shares |  |  |  | 970,784 |  |
Share-based compensation expense |  |  |  | $ 1,000,000 | $ 700,000 |
Share-Based Payment Arrangement, Nonemployee, Director | 2020 Directors Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total grant value of awards |  | $ 270,000 |  |  |  |
Share-Based Payment Arrangement, Nonemployee, Lead Director | 2020 Directors Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total grant value of awards |  | 283,500 |  |  |  |
Share-Based Payment Arrangement, Nonemployee, Chairman | 2020 Directors Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total grant value of awards |  | $ 297,000 |  |  |  |

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