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Summary of Significant Accounting Policies Inventory (Tables)
6 Months Ended
Apr. 30, 2019
Inventory Disclosure [Abstract]  
Inventory, Policy [Policy Text Block]
Inventories
Inventories 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 $216 million at April 30, 2019 compared to $154 million at October 31, 2018, offset by reserves of $45 million and $31 million, respectively.