Accounting for Leases as a Lessor - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Lessor, Lease, Description [Line Items]
Financing receivable term, low end of range	2 years
Financing receivable term, high end of range	5 years
Sold	$ 103	$ 185
Long-term financing receivables and other assets
Lessor, Lease, Description [Line Items]
Amount transferred via securitization	1,200	465
Assets Held under Capital Leases
Lessor, Lease, Description [Line Items]
Amount transferred via securitization	$ 675	$ 327