Inventories (Tables)

9 Months Ended

Sep. 30, 2013

Inventory Disclosure [Abstract]

Inventories

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

(Millions of dollars)	September 30, 2013		December 31, 2012
Raw materials	$	3,138	$	3,573
Work-in-process	2,749		2,920
Finished goods	7,221		8,767
Supplies	284		287
Total inventories	$	13,392	$	15,547