Segment Reporting - Narrative (Details) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 31, 2016 USD ($) segments	Jul. 31, 2016 USD ($)	Apr. 30, 2016 USD ($)	Jan. 31, 2016 USD ($)	Oct. 31, 2015 USD ($)	Jul. 31, 2015 USD ($)	Apr. 30, 2015 USD ($)	Jan. 31, 2015 USD ($)	Oct. 31, 2016 USD ($) segments	Oct. 31, 2015 USD ($)	Oct. 31, 2014 USD ($)
Segment Reporting [Abstract]
Concentration Risk, Customer									0	0	0
Segment Reporting Information [Line Items]
Number Of Segments | segments	4								4
Intersegment sales and revenues									$ 1	$ 0	$ 0
Sales and revenues, net	$ 2,063	$ 2,086	$ 2,197	$ 1,765	$ 2,488	$ 2,538	$ 2,693	$ 2,421	8,111	10,140	10,806
Financial Services Operations
Segment Reporting Information [Line Items]
Investment Income, Interest									167	175	170
Intersegment sales and revenues									100	96	79
Sales and revenues, net									235	241	232
North America Truck [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues									132	158	218
Sales and revenues, net									5,403	7,213	7,473
North America Parts [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues									29	38	58
Sales and revenues, net									2,427	2,513	2,551
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues									(305)	(343)	(390)
Sales and revenues, net									$ (295)	$ (333)	$ (390)