Inventories (Tables)

12 Months Ended

Dec. 31, 2011

Inventory, Net [Abstract]

Schedule of Inventory [Table Text Block]

The following table summarizes our inventory at December 31, 2011 and 2010:

Millions of dollars	2011			2010
Finished products	$	2,016		$	2,314
Work in process	41			37
Raw materials	500			590
	2,557			2,941
Less: excess of FIFO cost over LIFO cost	(203		)	(149		)
Total inventories	$	2,354		$	2,792