Segment Reporting - Summary of Segment Assets (Details) - USD ($) $ in Millions	Apr. 30, 2021	Oct. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	$ 7,084	$ 6,637
Truck
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	2,332	1,619
Parts
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	629	663
Global Operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	282	216
Financial Services
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	2,493	2,191
Corporate and Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	$ 1,348	$ 1,948