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INVENTORY (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Inventory-related excess and obsolescence charges $ 29 $ 27 $ 25
Finished goods 342 317  
Purchased parts and fabricated assemblies 415 388  
Total inventory $ 757 $ 705