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Inventories (Tables)
9 Months Ended
Sep. 30, 2013
Inventory Disclosure [Abstract]  
Inventories
(In millions)
 
September 30, 2013
 
December 31, 2012
Raw materials
 
$
968

 
$
945

Semi-finished products
 
877

 
883

Finished products
 
535

 
573

Supplies and sundry items
 
100

 
102

Total
 
$
2,480

 
$
2,503