INVENTORY (Tables)
 6 Months Ended
Apr. 30, 2016
Inventory, Net [Abstract]  
INVENTORY
7. INVENTORY
 
 
April 30,
2016
 
October 31,
2015
 
(in millions)
Finished goods
$
367

 
$
362

Purchased parts and fabricated assemblies
188

 
179

Inventory
$
555

 
$
541