Accounting for Leases as a Lessor - Operating Lease Assets Included in Machinery and Equipment (Details) - USD ($) $ in Millions	Apr. 30, 2020	Oct. 31, 2019
Leases [Abstract]
Equipment leased to customers		$ 7,185
Accumulated depreciation		(3,101)
Total		4,084
Lessor, Lease, Description [Line Items]
Total	$ 5,588	$ 6,054
Equipment Leased to Customers
Lessor, Lease, Description [Line Items]
Equipment leased to customers	7,018
Accumulated depreciation	(3,131)
Total	$ 3,887

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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The amount of accumulated depreciation, by major property class, recorded on property subject to or available for lease as of the balance sheet date.

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