Inventories (Tables)

12 Months Ended

Dec. 31, 2015

Inventory Disclosure [Abstract]

Inventories

Inventories (principally using the LIFO method) are comprised of the following:

	December 31,
(Millions of dollars)	2015		2014
Raw materials	$	2,467	$	2,986
Work-in-process	1,857		2,455
Finished goods	5,122		6,504
Supplies	254		260
Total inventories	$	9,700	$	12,205