v2.4.0.6

Fair Value Measurements (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Financial Assets: |  |
Financial Assets: Crude Oil Swaps | $ 65,000,000 | $ 29,000,000
Financial Assets: Crude Oil Options/Swaptions | 36,000,000 | 4,000,000
Financial Assets: Natural Gas Swaps |  | 81,000,000
Financial Assets: Natural Gas Options/Swaptions | 65,000,000 | 372,000,000
Financial Liabilities: |  |
Financial Liabilities: Crude Oil Options/Swaptions | 8,000,000 |
Financial Liabilities: Natural Gas Options/Swaptions | 13,000,000 |
Financial Liabilities: Foreign Currency Rate Swap | 55,000,000 | 52,000,000
Financial Liabilities: Interest Rate Swap | 4,000,000 | 3,000,000
Proved and Unproved Oil and Gas Properties and Other Property, Plant and Equipment Written Down during the Period - Fair Value at End of Period | 1,524,000,000 | 1,450,000,000
Proved and Unproved Oil and Gas Properties and Other Property, Plant and Equipment Written Down During the Period - Fair value at End of Period | 391,000,000 | 616,000,000
Pretax Impairment Charge for Proved Oil and Gas Properties and Other Property, Plant and Equipment, in which EOG utilized an accepted offer from a third-party buyer | 60,000,000 | 278,000,000
Impairment Charge For Proved and Unproved Oil And Gas Properties And Other Property, Plant And Equipment | 1,133,000,000 | 834,000,000
Fair Value of Debt | 7,032,000,000 | 5,657,000,000
Total Principal Amount of Long-Term Debt | 6,290,000,000 | 5,040,000,000
Fair Value, Inputs, Level 1 [Member] |  |
Financial Assets: |  |
Financial Assets: Crude Oil Swaps | 0 | 0
Financial Assets: Crude Oil Options/Swaptions | 0 | 0
Financial Assets: Natural Gas Swaps |  | 0
Financial Assets: Natural Gas Options/Swaptions | 0 | 0
Financial Liabilities: |  |
Financial Liabilities: Crude Oil Options/Swaptions | 0 |
Financial Liabilities: Natural Gas Options/Swaptions | 0 |
Financial Liabilities: Foreign Currency Rate Swap | 0 | 0
Financial Liabilities: Interest Rate Swap | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Financial Assets: |  |
Financial Assets: Crude Oil Swaps | 65,000,000 | 29,000,000
Financial Assets: Crude Oil Options/Swaptions | 36,000,000 | 4,000,000
Financial Assets: Natural Gas Swaps |  | 81,000,000
Financial Assets: Natural Gas Options/Swaptions | 65,000,000 | 372,000,000
Financial Liabilities: |  |
Financial Liabilities: Crude Oil Options/Swaptions | 8,000,000 |
Financial Liabilities: Natural Gas Options/Swaptions | 13,000,000 |
Financial Liabilities: Foreign Currency Rate Swap | 55,000,000 | 52,000,000
Financial Liabilities: Interest Rate Swap | 4,000,000 | 3,000,000
Fair Value, Inputs, Level 3 [Member] |  |
Financial Assets: |  |
Financial Assets: Crude Oil Swaps | 0 | 0
Financial Assets: Crude Oil Options/Swaptions | 0 | 0
Financial Assets: Natural Gas Swaps |  | 0
Financial Assets: Natural Gas Options/Swaptions | 0 | 0
Financial Liabilities: |  |
Financial Liabilities: Crude Oil Options/Swaptions | 0 |
Financial Liabilities: Natural Gas Options/Swaptions | 0 |
Financial Liabilities: Foreign Currency Rate Swap | 0 | 0
Financial Liabilities: Interest Rate Swap | $ 0 | $ 0

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- Definition The expense recorded to reduce the value of property, plant and equipment to estimated fair value when circumstances indicate such property, plant and equipment has been impaired and to reduce the value of oil and gas assets consisting of proved properties as the estimate of future successful production from these properties is reduced. + References No definition available. + Details
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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10A, 10B -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 4, 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13495-108611 + Details
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