Segment Reporting - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017 USD ($) segments	Jul. 31, 2016 USD ($)	Jul. 31, 2017 USD ($)	Jul. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number Of Segments | segments	4
Intersegment sales and revenues	$ 0	$ 0	$ 0	$ 0
Sales and revenues, net	2,213	2,086	5,972	6,048
Financial Services Operations
Segment Reporting Information [Line Items]
Intersegment sales and revenues	27	26	70	75
Sales and revenues, net	62	60	172	177
North America Truck [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	10	9	27	81
Sales and revenues, net	1,531	1,395	3,956	4,007
North America Parts [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	6	8	19	23
Sales and revenues, net	586	597	1,766	1,814
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	(53)	(55)	(134)	(212)
Sales and revenues, net	$ (50)	$ (51)	$ (126)	$ (204)