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Inventories
6 Months Ended
Jun. 30, 2016
Inventory, Net [Abstract]  
Inventories
INVENTORIES
The following table summarizes our inventory for the periods presented:
Millions of dollars
 
June 30,
2016
 
December 31,
2015
Finished products
 
$
2,665

 
$
2,093

Raw materials and work in process
 
652

 
655

 
 
3,317

 
2,748

Less: excess of FIFO cost over LIFO cost
 
(113
)
 
(129
)
Total inventories
 
$
3,204


$
2,619


LIFO inventories represented 37% of total inventories at June 30, 2016 and December 31, 2015, respectively.