Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Net Operating Revenues
Crude Oil and Condensate	$ 1,260,244us-gaap_OilAndCondensateRevenue	$ 2,397,102us-gaap_OilAndCondensateRevenue
Natural Gas Liquids	111,990eog_NaturalGasLiquids	246,235eog_NaturalGasLiquids
Natural Gas	287,782us-gaap_NaturalGasProductionRevenue	556,693us-gaap_NaturalGasProductionRevenue
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts	76,208	(155,736)
Gathering, Processing and Marketing	570,270eog_GatheringProcessingAndMarketing	1,015,411eog_GatheringProcessingAndMarketing
Gains on Asset Dispositions, Net	1,607us-gaap_GainsLossesOnSalesOfAssets	11,498us-gaap_GainsLossesOnSalesOfAssets
Other, Net	10,437eog_OtherNet	12,468eog_OtherNet
Total	2,318,538us-gaap_Revenues	4,083,671us-gaap_Revenues
Operating Expenses
Lease and Well	361,481eog_LeaseAndWell	320,834eog_LeaseAndWell
Transportation Costs	228,312eog_TransportationCosts	243,237eog_TransportationCosts
Gathering and Processing Costs	36,009eog_GatheringAndProcessingCosts	33,924eog_GatheringAndProcessingCosts
Exploration Costs	39,449us-gaap_ExplorationExpense	48,058us-gaap_ExplorationExpense
Dry Hole Costs	14,670us-gaap_ResultsOfOperationsDryHoleCosts	8,348us-gaap_ResultsOfOperationsDryHoleCosts
Impairments	69,436us-gaap_ImpairmentOfOilAndGasProperties	113,361us-gaap_ImpairmentOfOilAndGasProperties
Marketing Costs	638,662eog_MarketingCosts	1,006,304eog_MarketingCosts
Depreciation, Depletion and Amortization	912,788	946,491
General and Administrative	84,297us-gaap_GeneralAndAdministrativeExpense	82,862us-gaap_GeneralAndAdministrativeExpense
Taxes Other Than Income	106,429eog_TaxesOtherThanIncome	195,973eog_TaxesOtherThanIncome
Total	2,491,533us-gaap_CostsAndExpenses	2,999,392us-gaap_CostsAndExpenses
Operating Income (Loss)	(172,995)us-gaap_OperatingIncomeLoss	1,084,279us-gaap_OperatingIncomeLoss
Other Expense, Net	(9,991)us-gaap_OtherNonoperatingIncomeExpense	(3,338)us-gaap_OtherNonoperatingIncomeExpense
Income (Loss) Before Interest Expense and Income Taxes	(182,986)	1,080,941
Interest Expense
Interest Expense, Net	53,345us-gaap_InterestExpense	50,152us-gaap_InterestExpense
Income (Loss) Before Income Taxes	(236,331)	1,030,789
Income Tax Provision (Benefit)	(66,583)us-gaap_IncomeTaxExpenseBenefit	369,861us-gaap_IncomeTaxExpenseBenefit
Net Income (Loss)	(169,748)us-gaap_NetIncomeLoss	660,928us-gaap_NetIncomeLoss
Net Income (Loss) Per Share
Basic	$ (0.31)us-gaap_EarningsPerShareBasic	$ 1.22us-gaap_EarningsPerShareBasic
Diluted	$ (0.31)us-gaap_EarningsPerShareDiluted	$ 1.21us-gaap_EarningsPerShareDiluted
Dividends Declared per Common Share	$ 0.1675	$ 0.1250
Average Number of Common Shares
Basic	544,998	542,278
Diluted	544,998	548,071
Comprehensive Income (Loss)
Net Income (Loss)	(169,748)	660,928
Other Comprehensive Income (Loss)
Foreign Currency Translation Adjustments	(13,167)	(12,930)
Foreign Currency Swap Transaction	0eog_ForeignCurrencySwapTransaction	50eog_ForeignCurrencySwapTransaction
Income Tax Related to Foreign Currency Swap Transaction	0	(670)
Interest Rate Swap Transaction	0eog_InterestSwapTransactions	777eog_InterestSwapTransactions
Income Tax Related to Interest Rate Swap Transaction	0	(281)
Other	(211)eog_Other	23eog_Other
Other Comprehensive Loss	(13,378)	(13,031)
Comprehensive Income (Loss)	$ (183,126)	$ 647,897

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Total costs of sales and operating expenses for the period.

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Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells.

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