Inventories - Schedule of Inventories, Net of Reserves (Detail) - USD ($) $ in Millions	Jul. 31, 2020	Oct. 31, 2019
Inventory Disclosure [Abstract]
Chassis	$ 44.3	$ 44.9
Raw materials	211.8	198.1
Work in process	256.6	200.8
Finished products	73.2	79.6
Inventory, Gross, Total	585.9	523.4
Less: reserves	(13.6)	(10.0)
Total inventories, net	$ 572.3	$ 513.4

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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Gross amount of components used by the entity which are bought from another entity rather than produced by the entity.

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