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INVENTORY (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Inventory [Line Items]      
Finished goods $ 417 $ 416  
Purchased parts and fabricated assemblies 303 263  
Inventory 720 679  
Inventory-related excess and obsolescence charges $ 28 $ 19 $ 26