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Sales of Assets (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended
	Nov. 30, 2010 mi	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2010 Paulsboro Refinery [Member]	Dec. 31, 2012 Paulsboro Refinery [Member]	Dec. 31, 2011 Paulsboro Refinery [Member]	Dec. 31, 2010 Paulsboro Refinery [Member]	Jun. 30, 2010 Delaware City Refinery [Member]	Dec. 31, 2012 Delaware City Refinery [Member]	Dec. 31, 2011 Delaware City Refinery [Member]	Dec. 31, 2010 Delaware City Refinery [Member]
Results of Operations of Refinery Prior to Sale
Operating revenues							$ 0	$ 4,692			$ 0	$ 0
Loss before income tax expense							(9)	(53)			(3)	(29)
Sale of Paulsboro Refinery (Textual)
Total proceeds from sale of Paulsboro Refinery					707
Proceeds from sale of working capital					361
Gain (loss) on sale of refinery assets		0	(12)	(888)	(980)				92
Gain (loss) on sale of refinery, net of tax					(610)				58
Effect of LIFO inventory liquidation on income, increase (decrease)		134	247	16	(50)
Proceeds from sale of refineries					547	160	0	547	220	0	0	220
Note receivable, noncash consideration received					160
Sale of Delaware Refinery Assets and Associated Terminal and Pipeline Assets (Textual)
Gain on sale of other assets									3
Sale of Investment in CHOPS (Textual)
Equity method investment, ownership percentage	50.00%
Proceeds from the sale of investment in Cameron Highway Oil Pipeline Company	330	0	0	330
Gain on sale of investment in CHOPS	55	0	0	55
Gain on sale of investment in CHOPS, net of tax	$ 36
Length of crude oil pipeline in miles	390
Crude oil pipeline production per day in barrels	500,000

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