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Inventories
9 Months Ended
Sep. 30, 2012
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
(in millions)
September 30,
 2012            
 
December 31,
2011             
Finished goods
$
189

 
$
168

Work in process
37

 
31

Raw materials
241

 
227

Total inventories, net
$
467

 
$
426