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INVENTORY (Tables)
6 Months Ended
Apr. 30, 2019
Inventory, Net [Abstract]  
INVENTORY
 
April 30,
2019
 
October 31,
2018
 
(in millions)
Finished goods
$
290

 
$
283

Purchased parts and fabricated assemblies
370

 
336

Total inventory
$
660

 
$
619