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Inventories
6 Months Ended
Jun. 30, 2013
Inventory, Net [Abstract]  
Inventories
INVENTORIES
The following table summarizes our inventory for the periods presented:
Millions of dollars
 
June 30,
2013
 
December 31,
2012
Finished products
 
$
2,082

 
$
1,948

Raw materials and work in process
 
596

 
596

Gross inventories
 
2,678

 
2,544

Less: excess of FIFO cost over LIFO cost
 
(173
)
 
(190
)
Total inventories
 
$
2,505


$
2,354


LIFO inventories represented 39% and 40% of total inventories at June 30, 2013 and December 31, 2012, respectively.