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Inventories
9 Months Ended
Sep. 30, 2012
Inventory, Net [Abstract]  
Inventories
INVENTORIES
The following table summarizes our inventory for the periods presented:
Millions of dollars
 
September 30,
2012
 
December 31,
2011
Finished products
 
$
2,180

 
$
2,016

Raw materials and work in process
 
613

 
541

 
 
2,793

 
2,557

Less: excess of FIFO cost over LIFO cost
 
(195
)
 
(203
)
Total inventories
 
$
2,598


$
2,354


LIFO inventories represented 41% of total inventories at September 30, 2012 and December 31, 2011.