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Supplementary Financial Information - Property Plant & Equipment (Details) - USD ($)
$ in Millions
Apr. 30, 2021
Oct. 31, 2020
Property, Plant and Equipment, Net    
Property, plant and equipment, gross $ 7,441 $ 7,341
Accumulated depreciation (4,903) (4,714)
Property, plant and equipment, net 2,538 2,627
Land, buildings and leasehold improvements    
Property, Plant and Equipment, Net    
Property, plant and equipment, gross 2,125 2,066
Machinery and equipment, including equipment held for lease    
Property, Plant and Equipment, Net    
Property, plant and equipment, gross $ 5,316 $ 5,275