Inventories (Tables)

6 Months Ended

Jun. 30, 2011

Inventory [Abstract]

Inventories

	June 30,			December 31,
	2011			2010
	(Millions of dollars)
Crude oil and other charge stocks	$	494		$	496
Refined petroleum products and natural gas		1,788			1,528
Less: LIFO adjustment		(1,302	)		(995	)
		980			1,029
Merchandise, materials and supplies		452			423
Total inventories	$	1,432		$	1,452