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Inventories
 3 Months Ended
Mar. 31, 2016
Inventory, Net [Abstract]  
Inventories
Inventories 
 
March 31,
2016
December 31,
2015
Finished products
$
3,401

$
3,779

Semi-finished products
1,559

1,780

Raw materials, stores and supplies
721

783

 
5,681

6,342

Adjustment of inventories to a last-in, first-out (LIFO) basis
(199
)
(202
)
Total
$
5,482

$
6,140