Inventories (Tables)

3 Months Ended

Mar. 31, 2012

Inventory, Net [Abstract]

Schedule of Inventory

The following table summarizes our inventory for the periods presented:

Millions of dollars	March 31, 2012			December 31, 2011
Finished products	$	2,232		$	2,016
Raw materials and work in process	572			541
	2,804			2,557
Less: excess of FIFO cost over LIFO cost	(196		)	(203		)
Total inventories	$	2,608		$	2,354