Inventories (Tables)

12 Months Ended

Dec. 31, 2012

Inventory Disclosure [Abstract]

Inventories

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

	December 31,
(Millions of dollars)	2012		2011		2010
Raw materials	$	3,573	$	3,766	$	2,766
Work-in-process	2,920		2,959		1,483
Finished goods	8,767		7,562		5,098
Supplies	287		257		240
Total inventories	$	15,547	$	14,544	$	9,587