Summary of Significant Accounting Policies - Inventory (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Apr. 30, 2016	Apr. 30, 2016	Oct. 31, 2015
Inventory [Line Items]
Gross truck bed inventory	$ 448	$ 448	$ 390
Inventory reserves	168	168	$ 110
Cost of Goods [Member] | Inventory Valuation Reserve [Member]
Inventory [Line Items]
Additional reserves added during period	$ 23	$ 58