| **Summary of Significant Accounting Policies Inventory (Tables)** | 3 Months Ended                                                                                                                                                                                                                                                                                                                                |
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| **Inventory Disclosure [Abstract]**                               |                                                                                                                                                                                                                                                                                                                                          |
| Inventory, Policy [Policy Text Block]                             | InventoriesInventories are valued at the lower of cost and net realizable value. Cost is principally determined using the first-in, first-out method. Our gross used truck inventory was $253 million at January 31, 2020 compared to $200 million at October 31, 2019, offset by reserves of $53 million and $37 million, respectively. |

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| - References
No definition available.
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| - Definition
Disclosure of inventory accounting policy for inventory classes, including, but not limited to, basis for determining inventory amounts, methods by which amounts are added and removed from inventory classes, loss recognition on impairment of inventories, and situations in which inventories are stated above cost.
+ References
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