Inventories (Tables)

12 Months Ended

Dec. 31, 2011

Inventories [Abstract]

Schedule of inventories

Inventories consisted of the following (in millions):

	December 31,
	2011		2010
Refinery feedstocks	$	2,474	$	2,225
Refined products and blendstocks	2,633		2,233
Ethanol feedstocks and products	195		201
Convenience store merchandise	103		101
Materials and supplies	218		187
Inventories	$	5,623	$	4,947