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INVENTORY (Tables)
3 Months Ended
Jan. 31, 2020
Inventory, Net [Abstract]  
INVENTORY
 
January 31,
2020
 
October 31,
2019
 
(in millions)
Finished goods
$
342

 
$
317

Purchased parts and fabricated assemblies
395

 
388

Total inventory
$
737

 
$
705