Leases Carrying Value of Assets Subject to Leases (Details) - USD ($) $ in Millions	Jul. 31, 2020	Oct. 31, 2019
Lessor, Lease, Description [Line Items]
Property Subject to or Available for Operating Lease, Gross		$ 562
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 2,328	2,488
Property Subject to or Available for Operating Lease, Accumulated Depreciation		125
Property, Plant and Equipment, Net	1,241	1,309
Property Subject to or Available for Operating Lease, Net		$ 437
Assets Leased to Others [Member]
Lessor, Lease, Description [Line Items]
Property, Plant and Equipment, Gross	546
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	127
Property, Plant and Equipment, Net	$ 419

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

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