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Stock Plans - Narrative (Details) $ / shares in Units, $ in Millions |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2023 director shares | Mar. 18, 2019 shares | Mar. 31, 2016 director shares | Oct. 31, 2023 USD ($) $ / shares shares | Oct. 31, 2022 USD ($) $ / shares shares | Oct. 31, 2021 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total unrecognized compensation cost related to nonvested options |  |  |  | $ 17.6 |  |
Share-based compensation expense |  |  |  | $ 62.1 | $ 54.2 | $ 44.7
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 1 month 6 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 4 months 24 days |  |
Total unrecognized compensation cost related to nonvested units |  |  |  | $ 63.1 |  |
Fair value of vested grants |  |  |  | $ 37.3 | 46.1 | 50.1
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 8 months 12 days |  |
Total unrecognized compensation cost related to nonvested units |  |  |  | $ 12.3 |  |
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 |  |  |
2023 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 | 1,365,000 |  |  |  |  |
Shares remaining for future grant (in shares) | shares |  |  |  | 1,376,240 |  |
Third Amended And Restated 2007 Long-Term Incentive Plan And 2023 Long-Term Incentive Plan | Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total intrinsic value of options exercised |  |  |  | $ 13.4 | $ 6.6 | $ 64.7
Weighted-average fair value of each option granted (in dollars per share) | $ / shares |  |  |  | $ 103.17 | $ 90.41 | $ 84.10
Award expiration date (no more than) |  |  |  | 10 years |  |
Third Amended And Restated 2007 Long-Term Incentive Plan And 2023 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 And 2023 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 And 2023 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 And 2023 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% |  |  |  |
Number of shares issued to employees | shares |  |  |  | 26,116 | 22,695 |
Number of shares remaining available for future issuance | shares |  |  |  | 921,975 |  |
Share-based compensation expense |  |  |  | $ 1.3 | $ 1.1 |

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