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Oil and Gas Exploration and Production Industries Disclosures, Average Sales Price (Details) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Average Sales Price and Production Costs Per Unit of Production [Line Items] |  |  |
Production costs per barrel of oil equivalent | 5.85 | 6.03 | 4.85
United States [Member] |  |  |
Average Sales Price and Production Costs Per Unit of Production [Line Items] |  |  |
Production costs per barrel of oil equivalent | 5.96 | 6.19 | 5.00
Canada [Member] |  |  |
Average Sales Price and Production Costs Per Unit of Production [Line Items] |  |  |
Production costs per barrel of oil equivalent | 16.42 | 14.26 | 10.28
Trinidad [Member] |  |  |
Average Sales Price and Production Costs Per Unit of Production [Line Items] |  |  |
Production costs per barrel of oil equivalent | 0.98 | 0.78 | 0.65
Other International [Member] |  |  |
Average Sales Price and Production Costs Per Unit of Production [Line Items] |  |  |
Production costs per barrel of oil equivalent | 18.97 | 13.82 | 9.34

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- Definition Production costs incurred in lifting the oil and gas to the surface during the reporting period divided by the number of barrels of oil equivalents (BOE) produced. Production (or lifting costs) are costs incurred in lifting the oil and gas to the surface and generally include gathering, treating, primary processing, field storage, property taxes and insurance on proved properties, but do not include depreciation, depletion, accretion, amortization, royalties, income taxes, interest, general and administrative and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 2 -Paragraph 3 -Subparagraph A + Details
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- Details
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