Segment Reporting - Summary of Segment Assets (Details) - USD ($) $ in Millions	Oct. 31, 2020	Oct. 31, 2019
Segment Reporting Information [Line Items]
Segment Assets	$ 6,637	$ 6,917
North America Truck [Member]
Segment Reporting Information [Line Items]
Segment Assets	1,619	1,705
North America Parts [Member]
Segment Reporting Information [Line Items]
Segment Assets	663	688
Global Operations [Member]
Segment Reporting Information [Line Items]
Segment Assets	216	296
Financial Services Operations
Segment Reporting Information [Line Items]
Segment Assets	2,191	2,774
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Segment Assets	$ 1,948	$ 1,454