Inventories (Tables)

3 Months Ended

Mar. 31, 2015

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, 2015		December 31, 2014
Finished products and parts	$	2,367	$	2,606
Raw materials and supplies	883		754
Work in process	217		211
Total	$	3,467	$	3,571