Inventories

9 Months Ended

Sep. 30, 2011

Inventory [Abstract]

Inventories

4. Inventories

     Inventories consist of the following:

	September 30,			December 31,
	2011			2010
	(Millions of dollars)
Crude oil and other charge stocks	$	589		$	496
Refined petroleum products and natural gas		1,747			1,528
Less: LIFO adjustment		(1,318	)		(995	)
		1,018			1,029
Merchandise, materials and supplies		498			423
Total inventories	$	1,516		$	1,452