INVENTORY (Tables)
 6 Months Ended
Apr. 30, 2017
Inventory, Net [Abstract]  
INVENTORY
 
April 30,
2017
 
October 31,
2016
 
(in millions)
Finished goods
$
293

 
$
218

Purchased parts and fabricated assemblies
292

 
256

Total inventory
$
585

 
$
474


The increase was primarily driven by acquisition of Ixia (See Note 3).