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Inventories
12 Months Ended
Dec. 31, 2014
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES

All inventories are stated at the lower of cost or market. Cost for a substantial portion of U.S. inventories is determined on a last-in, first-out (“LIFO”) basis. LIFO was used for 28% and 20% of total inventories at December 31, 2014 and 2013, respectively. Cost of other inventories is determined by costing methods that approximate a first-in, first-out (“FIFO”) basis.

Inventories at December 31 were as follows (in millions):
 
2014
 
2013
Raw materials, work-in-process, and supplies
$
3,822

 
$
3,628

Finished products
5,022

 
5,081

Total inventories under FIFO
8,844

 
8,709

LIFO adjustment
(978
)
 
(1,001
)
Total inventories
$
7,866

 
$
7,708