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Inventories (Tables)
9 Months Ended
Sep. 30, 2013
Inventory Disclosure [Abstract]  
Inventories
The cost of the remaining inventory was recorded on the average cost method. Inventories consisted of the following:
Millions of dollars
September 30,
2013
December 31,
2012
Finished products and parts
$
2,441

$
2,264

Raw materials and supplies
805

793

Work in process
153

129

Total
$
3,399

$
3,186