Supplementary Financial Information - Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Property, Plant and Equipment, Net
Property, plant and equipment, gross	$ 7,341	$ 7,037
Accumulated depreciation	(4,714)	(4,243)
Property, plant and equipment, net	2,627	2,794
Depreciation expense	673	623	$ 448
Land, buildings and leasehold improvements
Property, Plant and Equipment, Net
Property, plant and equipment, gross	2,066	1,977
Machinery and equipment, including equipment held for lease
Property, Plant and Equipment, Net
Property, plant and equipment, gross	$ 5,275	$ 5,060

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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