v2.4.0.6

Risk Management Activities (Details) (USD $) | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 Months Ended | 12 Months Ended | 9 Months Ended | 6 Months Ended | 9 Months Ended | 6 Months Ended | 9 Months Ended
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Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011 | Sep. 30, 2012 Crude Oil and Natural Gas Derivative Contracts [Member] Liabilities From Price Risk Management Activities [Member] | Dec. 31, 2011 Crude Oil and Natural Gas Derivative Contracts [Member] Liabilities From Price Risk Management Activities [Member] | Sep. 30, 2012 Crude Oil and Natural Gas Derivative Contracts [Member] Assets From Price Risk Management Activities [Member] | Dec. 31, 2011 Crude Oil and Natural Gas Derivative Contracts [Member] Assets From Price Risk Management Activities [Member] | Sep. 30, 2012 Crude Oil and Natural Gas Derivative Contracts [Member] Other Assets [Member] | Dec. 31, 2011 Crude Oil and Natural Gas Derivative Contracts [Member] Other Assets [Member] | Sep. 30, 2012 Crude Oil and Natural Gas Derivative Contracts [Member] Other Liabilities [Member] | Dec. 31, 2011 Crude Oil and Natural Gas Derivative Contracts [Member] Other Liabilities [Member] | Sep. 30, 2012 Interest Rate Swap [Member] Other Liabilities [Member] | Dec. 31, 2011 Interest Rate Swap [Member] Other Liabilities [Member] | Sep. 30, 2012 Foreign Currency Swap [Member] Other Liabilities [Member] | Dec. 31, 2011 Foreign Currency Swap [Member] Other Liabilities [Member] | Sep. 30, 2012 Crude Oil Derivative Contracts January - February [Member] | Sep. 30, 2012 Natural Gas Derivative Contracts January - October [Member] | Dec. 31, 2013 Natural Gas Derivative Contracts Year Two January - December [Member] | Dec. 31, 2014 Natural Gas Derivative Contracts Year Three January - December [Member] | Sep. 30, 2012 Natural Gas Derivative Contracts - November - December [Member] | Jun. 30, 2014 Crude Oil Derivative Contracts January - June Year Three [Member] | Jun. 30, 2013 Crude Oil Derivative Contracts January - June Year Two [Member] | Sep. 30, 2012 Crude Oil Derivative Contracts March - June [Member] | Sep. 30, 2012 Crude Oil Derivative Contracts July - August [Member] | Sep. 30, 2012 Crude Oil Derivative Contracts September [Member] | Dec. 31, 2013 Crude Oil Derivative Contracts July - December Year Two [Member] | Sep. 30, 2012 Crude Oil Derivative Contracts October - December [Member]
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volume (MMBtu) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 525,000 | 150,000 |  | 525,000 |  |  |  |  |  |  |
Volume (Bbld) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 34,000 |  |  |  |  |  | 98,000 | 52,000 | 50,000 | 32,000 | 54,000 | 42,000
Volumes (MMBtud) - Derivative Option Contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150,000 | 150,000 | 425,000 |  |  |  |  |  |  |
Average Price ($/MMBtu) - Derivative Option Contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.79 | 4.79 | 5.44 |  |  |  |  |  |  |
Derivative Weighted Average Price Crude Oil ($/Bbl) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 104.95 |  |  |  |  |  | 99.39 | 105.80 | 106.90 | 106.61 | 99.38 | 105.19
Derivative Weighted Average Price Natural Gas ($/MMBtu) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.44 | 4.79 |  | 5.44 |  |  |  |  |  |  |
Volumes (Bbld) - Derivative Option Contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,000 | 25,000 |  |  |  | 59,000 |
Average Price ($/Bbl) - Derivative Option Contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 103.54 | 106.27 |  |  |  | 100.45 |
Proceeds from financial derivative contracts settled during the period |  |  | $ 36,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives Assets, Current | 248,698,000 |  | 248,698,000 |  | 450,730,000 |  |  | 238,000,000 | 451,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Assets |  |  |  |  |  |  |  |  |  | 14,000,000 | 35,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Liabilities, Current |  |  |  |  |  | 1,000,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Liabilities |  |  |  |  |  |  |  |  |  |  |  | 6,000,000 | 0 | 4,000,000 | 3,000,000 | 57,000,000 | 52,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Rate Derivative [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Issued by EOG's Canadian Subsidiary | 150,000,000 |  | 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
After-Tax Net Impact Other Comprehensive Income Increase (Decrease) From The Foreign Currency Swap | 1,100,000 | 500,000 | 1,700,000 | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate Cash Flow Hedges [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate Swap, Notional Amount | 350,000,000 |  | 350,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
After-Tax Net Impact From Interest Rate Swap | (200,000) | (1,600,000) | (400,000) | (4,200,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Collateral [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral Held on Derivative |  |  |  |  | $ 67,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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