Insurance - Instruments Used to Collateralize Insurance Obligations (Details) - USD ($) $ in Millions |
Jul. 31, 2021 |
Oct. 31, 2020 |
|---|---|---|
| Letters Of Credit [Line Items] | ||
| Instruments used to collateralize insurance obligations | $ 223.5 | $ 226.9 |
| Standby letters of credit | ||
| Letters Of Credit [Line Items] | ||
| Instruments used to collateralize insurance obligations | 139.0 | 143.6 |
| Surety bonds | ||
| Letters Of Credit [Line Items] | ||
| Instruments used to collateralize insurance obligations | 83.8 | 82.6 |
| Restricted insurance deposits | ||
| Letters Of Credit [Line Items] | ||
| Instruments used to collateralize insurance obligations | $ 0.7 | $ 0.7 |