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Inventories
9 Months Ended
Sep. 30, 2012
Inventory, Net [Abstract]  
Inventories
Inventories
The principal categories of inventories are:
 
 
September 30,
2012
 
December 31, 2011
Finished goods
$
582

 
$
544

Work in process
39

 
33

Raw materials
101

 
91

Total
$
722

 
$
668