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Employee Benefit Plans - Deferred Compensation Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017
Deferred Compensation Plans |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Total liability of deferred compensation | $ 13.2 | $ 13.9 |
Compensation expense | 0.3 | 0.4 | $ 0.4
Rabbi Trust |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Fair value deferred compensation plan assets | $ 2.5 | $ 2.7 |

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