Summary of Significant Accounting Policies - Inventory (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Inventory [Line Items]
Gross truck bed inventory	$ 410	$ 390
Inventory reserves	208	110
Inventory Valuation Reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	110	43	$ 17
Additions charged to expense	187	117	52
Deductions/Other additions	(89)	(50)	(26)
Balance at end of period	208	$ 110	$ 43
Cost of Goods [Member] | Inventory Valuation Reserve
Inventory [Line Items]
Additional reserves added during period	$ 98