Supplementary Financial Information - Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Property, Plant and Equipment, Net
Property, plant and equipment, gross	$ 7,037	$ 6,109
Accumulated depreciation	(4,243)	(3,911)
Property, plant and equipment, net	2,794	2,198
Depreciation expense	623	448	$ 353
Land, buildings and leasehold improvements
Property, Plant and Equipment, Net
Property, plant and equipment, gross	1,977	1,893
Machinery and equipment, including equipment held for lease
Property, Plant and Equipment, Net
Property, plant and equipment, gross	$ 5,060	$ 4,216

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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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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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