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Impairments (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended |  | 1 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Sep. 30, 2012 Aruba Refinery [Member] | Mar. 31, 2012 Aruba Refinery [Member] | Jun. 30, 2012 Aruba Refinery [Member] | Mar. 28, 2012 Aruba Refinery [Member] | Sep. 30, 2012 Refining Assets [Member] | Sep. 30, 2012 Inventory Related Assets [Member] | Mar. 31, 2012 Construction in Progress [Member] | Jun. 30, 2012 Construction in Progress [Member]
Impairments (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Non-binding purchase offer |  |  |  |  |  |  |  | $ 350 |  |  |  |
Asset impairment losses | $ 0 | $ 0 | $ 0 | $ 611 | $ 333 | $ 595 | $ 595 |  | $ 308 | $ 25 | $ 16 | $ 16

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
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- Details
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- Definition Non-binding indication of a third party's interest to purchase an asset or group of assets. + References No definition available. + Details
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