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Stock Plans - Narrative (Details) $ / shares in Units, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 18, 2019 shares | Mar. 31, 2016 director shares | Oct. 31, 2022 USD ($) $ / shares shares | Oct. 31, 2021 USD ($) $ / shares shares | Oct. 31, 2020 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Total unrecognized compensation cost related to nonvested options | $ |  |  | $ 21.0 |  |
Share-based compensation expense | $ |  |  | $ 54.2 | $ 44.7 | $ 38.6
Stock Options |  |  |  |  |
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 3 months 18 days |  |
Options granted in period (in shares) | shares |  |  | 122,760 |  |
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 6 months |  |
Total unrecognized compensation cost related to nonvested units | $ |  |  | $ 64.4 |  |
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 |  |  | 1 year 9 months 18 days |  |
Total unrecognized compensation cost related to nonvested units | $ |  |  | $ 11.2 |  |
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% |  |
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 |  |  | 690,596 |  |
Third Amended and Restated 2007 Long-Term Incentive Plan | Stock Options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Weighted-average fair value of each option granted (in dollars per share) | $ / shares |  |  | $ 90.41 | $ 84.10 | $ 70.45
Total intrinsic value of options exercised | $ |  |  | $ 6.6 | $ 64.7 | $ 22.6
Award expiration date (no more than) |  |  | 10 years |  |
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 |  |
2020 Directors Plan | Stock Options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period |  |  | 1 year |  |
Award expiration date (no more than) |  |  | 10 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% |  |  |  |
Number of shares issued to employees | shares |  |  | 22,695 | 17,575 |
Number of shares remaining available for future issuance | shares |  |  | 948,090 |  |
Share-based compensation expense | $ |  |  | $ 1.1 | $ 1.0 |

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