Pretax gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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The date that the entity disposed of a business or a group of assets.

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Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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The gains (losses) included in results of operations resulting from the sale or disposal of other assets.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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Disposition (Details) (USD $) In Millions	6 Months Ended		1 Months Ended	3 Months Ended	6 Months Ended
Disposition (Details) (USD $) In Millions	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2010 Delaware City Refinery [Member]	Jun. 30, 2010 Delaware City Refinery [Member]	Jun. 30, 2010 Delaware City Refinery [Member]
Results of operations for the Delaware City Refinery prior to its sale
Operating revenues				$ 0	$ 0
Loss before income taxes				(7)	(33)
Sale of Refinery Assets and Associated Terminal and Pipeline Assets (Textual)
Disposal Date			June 2010
Proceeds from the sale of the Delaware City Refinery assets and associated terminal and pipeline assets	0	220	220
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	0	92	92
Gain on Sale of Refinery Net of Tax			58
Gain (Loss) on Sale of Other Assets			$ 3