Segment Reporting - Narrative (Details) $ in Millions	3 Months Ended
	Jan. 31, 2020 USD ($) segments	Jan. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number Of Segments | segments	4
Intersegment sales and revenues	$ 0	$ 0
Sales and revenues, net	1,838	2,433
Financial Services Operations
Segment Reporting Information [Line Items]
Intersegment sales and revenues	11	27
Sales and revenues, net	46	47
North America Truck [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	4	21
Sales and revenues, net	1,238	1,776
North America Parts [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	1	2
Sales and revenues, net	492	546
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	(23)	(62)
Sales and revenues, net	$ 1	$ 3