Finance Receivables - Schedule of Finance Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Finance Revenues [Line Items]
Retail notes and finance leases revenue	$ 15	$ 18	$ 31	$ 34
Operating lease revenue	30	28	58	56
Gross finance revenues	50	64	101	121
Less: Intercompany revenues	7	14	13	25
Lease Receivable
Finance Revenues [Line Items]
Operating lease revenue	24	23	47	44
Financial Services
Finance Revenues [Line Items]
Finance revenues	43	50	88	96
Wholesale notes revenue | Notes Receivable
Finance Revenues [Line Items]
Interest income revenue	9	19	20	35
Retail and wholesale accounts revenue
Finance Revenues [Line Items]
Interest income revenue	$ 2	$ 4	$ 3	$ 8