Segment Reporting - Summary of Segment Assets (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Segment Reporting Information [Line Items]
Segment Assets	$ 7,230	$ 6,135
North America Truck [Member]
Segment Reporting Information [Line Items]
Segment Assets	2,085	1,621
North America Parts [Member]
Segment Reporting Information [Line Items]
Segment Assets	636	632
Global Operations [Member]
Segment Reporting Information [Line Items]
Segment Assets	331	378
Financial Services Operations
Segment Reporting Information [Line Items]
Segment Assets	2,648	2,207
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Segment Assets	$ 1,530	$ 1,297