Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Inventories

The cost of the remaining inventory was recorded using the average cost method. Inventories consisted of the following:

Millions of dollars	March 31, 2016		December 31, 2015
Finished products and parts	$	1,878	$	1,992
Raw materials and supplies	901		879
Work in process	114		122
Total	$	2,893	$	2,993