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INVENTORY (Tables)
9 Months Ended
Jul. 31, 2020
Inventory, Net [Abstract]  
INVENTORY
 
July 31,
2020
 
October 31,
2019
 
(in millions)
Finished goods
$
351

 
$
317

Purchased parts and fabricated assemblies
427

 
388

Total inventory
$
778

 
$
705