Inventories - Schedule of Inventories, Net of Reserves (Detail) - USD ($) $ in Millions	Jul. 31, 2018	Oct. 31, 2017
Inventory Disclosure [Abstract]
Chassis	$ 53.1	$ 54.7
Raw materials	192.6	162.5
Work in process	191.8	180.1
Finished products	108.7	68.4
Inventory, Gross, Total	546.2	465.7
Less: reserves	(14.7)	(13.3)
Total inventories, net	$ 531.5	$ 452.4

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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 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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