Inventory
 6 Months Ended
Apr. 30, 2011
Inventory [Abstract]  
Inventory
7. INVENTORY
 
 
 
 
April 30,
2011
  
October 31,
2010
 
 
 
(in millions)
 
Finished goods
 $407  $338 
Purchased parts and fabricated assemblies
  446   378 
Inventory
 $853  $716