Inventories (Tables)

3 Months Ended

Mar. 31, 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	March 31, 2013		December 31, 2012
Finished products and parts	$	2,301	$	2,264
Raw materials and supplies	828		793
Work in process	128		129
Total	$	3,257	$	3,186