Inventories

9 Months Ended

Sep. 30, 2011

Inventories

Inventories

5. Inventories

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

(Millions of dollars)	September 30, 2011	December 31, 2010
Raw materials	$3,649	$2,766
Work-in-process	3,020	1,483
Finished goods	7,474	5,098
Supplies	269	240
Total inventories	$14,412	$9,587

During the third quarter of 2011, we acquired $2,305 million of inventory (valued using the first-in, first-out (FIFO) method) as a result of the acquisition of Bucyrus International, Inc.  See Note 18 for details on this business combination.