Inventories (Tables)

9 Months Ended

Sep. 30, 2016

Inventory Disclosure [Abstract]

Inventories

Inventories (principally using the last-in, first-out (LIFO) method) are comprised of the following:

(Millions of dollars)	September 30, 2016		December 31, 2015
Raw materials	$	2,359	$	2,467
Work-in-process	2,015		1,857
Finished goods	4,866		5,122
Supplies	238		254
Total inventories	$	9,478	$	9,700