Inventories (Details) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2010 Paulsboro Refinery [Member]
Schedule of Inventories
Refinery feedstocks	$ 2,474,000,000	$ 2,225,000,000
Refined products and blendstocks	2,633,000,000	2,233,000,000
Ethanol feedstocks and products	195,000,000	201,000,000
Convenience store merchandise	103,000,000	101,000,000
Materials and supplies	218,000,000	187,000,000
Inventories	5,623,000,000	4,947,000,000
Inventories (Textual)
Effect of LIFO inventory liquidation on income	(247,000,000)	(16,000,000)	66,000,000	50,000,000
Effect of LIFO inventory liquidation on income, net of tax				31,000,000
Excess of market value over carrying amount of LIFO inventories	$ 6,800,000,000	$ 6,100,000,000