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Impairments (Details) (USD $) In Millions, unless otherwise specified			1 Months Ended		9 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Aruba Refinery [Member]	Mar. 31, 2012 Aruba Refinery [Member]	Sep. 30, 2012 Aruba Refinery [Member]	Mar. 28, 2012 Aruba Refinery [Member]	Sep. 30, 2012 Refining Assets [Member]	Sep. 30, 2012 Refining Assets [Member]	Sep. 30, 2012 Inventory Related Assets [Member]	Sep. 30, 2012 Inventory Related Assets [Member]	Sep. 30, 2012 Terminal Assets [Member]	Sep. 30, 2012 Retail [Member]	Sep. 30, 2012 Retail [Member]	Mar. 31, 2012 Construction in Progress [Member]	Sep. 30, 2012 Construction in Progress [Member]
Impairments (Textual)
Non-binding purchase offer						$ 350
Long-lived assets, fair value				350								5	5
Long-lived assets, carrying value	25,873	25,177		945			308	308			37
Asset impairment loss			$ 333	$ 595	$ 928		$ 308	$ 903	$ 25	$ 25		$ 12	$ 12	$ 16	$ 16

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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