Sales of Assets (Details) (USD $)	1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended				1 Months Ended	6 Months Ended		12 Months Ended
	Nov. 30, 2010 mi	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2010 Paulsboro Refinery [Member]	Dec. 31, 2011 Paulsboro Refinery [Member]	Dec. 31, 2010 Paulsboro Refinery [Member]		Dec. 31, 2009 Paulsboro Refinery [Member]	Jun. 30, 2010 Delaware City Refinery [Member]	Jun. 30, 2010 Delaware City Refinery [Member]		Dec. 31, 2011 Delaware City Refinery [Member]	Dec. 31, 2010 Delaware City Refinery [Member]	Dec. 31, 2009 Delaware City Refinery [Member]
Results of Operations of Refinery Prior to Sale
Operating revenues						$ 0	$ 4,692,000,000		$ 3,545,000,000				$ 0	$ 0	$ 2,764,000,000
Loss before income tax expense						(9,000,000)	(53,000,000)		(133,000,000)				(3,000,000)	(29,000,000)	(769,000,000)
Sale of Paulsboro Refinery (Textual)
Total proceeds from sale of Paulsboro Refinery					707,000,000
Proceeds from sale of working capital					361,000,000
Gain (loss) on sale of refinery assets		(12,000,000)	(888,000,000)	(1,868,000,000)			(980,000,000)	[1]			92,000,000	[2]
Gain (loss) on sale of refinery, net of tax					(610,000,000)					58,000,000
Effect of LIFO inventory liquidation on income		(247,000,000)	(16,000,000)	66,000,000	50,000,000
Inventory Settlement Accrual					40,000,000
Proceeds from sale of refineries					547,000,000	0	547,000,000		0	220,000,000			0	220,000,000	0
Notes receivable and other		214,000,000	182,000,000		160,000,000		160,000,000
Sale of Delaware Refinery Assets and Associated Terminal and Pipeline Assets (Textual)
Pre tax loss related to shutdown refinery															1,901,000,000
Write down of the book value of refinery assets to net realizable value															1,400,000,000
Gain on sale of other assets										3,000,000
Sale of Investment in CHOPS (Textual)
Interest in Cameron Highway Oil Pipeline Company in percentage	50.00%
Proceeds from sale of investment in CHOPS	330,000,000	0	330,000,000	0
Gain on sale of investment in CHOPS		0	55,000,000	0
Gain on sale of investment in CHOPS, net of tax			$ 36,000,000
Length of crude oil pipeline in miles	390
Crude oil pipeline production per day in barrels	500,000

[1] Net loss for the quarter ended December 31, 2010 includes the $980 million pre-tax loss related to the sale of the Paulsboro Refinery as discussed in Note 3.

[2] Net income for the quarter ended June 30, 2010 includes the $92 million pre-tax gain related to the sale of the Delaware City Refinery as discussed in Note 3.