Segment Reporting - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017 USD ($) segments	Apr. 30, 2016 USD ($)	Apr. 30, 2017 USD ($)	Apr. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Number Of Segments | segments	4
Intersegment sales and revenues	$ 0	$ 0	$ 0	$ 0
Sales and revenues, net	2,096	2,197	3,759	3,962
Financial Services Operations
Segment Reporting Information [Line Items]
Intersegment sales and revenues	23	25	43	49
Sales and revenues, net	56	58	110	117
North America Truck [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	7	21	17	72
Sales and revenues, net	1,398	1,480	2,425	2,612
North America Parts [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	6	7	13	15
Sales and revenues, net	610	647	1,180	1,217
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	(40)	(66)	(81)	(157)
Sales and revenues, net	$ (38)	$ (65)	$ (76)	$ (153)