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Inventories
12 Months Ended
Dec. 31, 2012
Inventories [Abstract]  
Inventories
5.      Inventories

Inventories comprise the following (in millions):
 
December 31,
 
2012
 
2011
Finished goods
$
392
 
$
312
Work in process
 
168
   
199
Raw materials and accessories
 
271
   
268
Supplies and packing materials
 
220
   
196
Total inventories
$
1,051
 
$
975