Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Operating Revenues
Crude Oil and Condensate	$ 9,742,480us-gaap_OilAndCondensateRevenue	$ 8,300,647us-gaap_OilAndCondensateRevenue	$ 5,659,437us-gaap_OilAndCondensateRevenue
Natural Gas Liquids	934,051eog_NaturalGasLiquids	773,970eog_NaturalGasLiquids	727,177eog_NaturalGasLiquids
Natural Gas	1,916,386us-gaap_NaturalGasProductionRevenue	1,681,029us-gaap_NaturalGasProductionRevenue	1,571,762us-gaap_NaturalGasProductionRevenue
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts	834,273	(166,349)	393,744
Gathering, Processing and Marketing	4,046,316eog_GatheringProcessingAndMarketing	3,643,749eog_GatheringProcessingAndMarketing	3,096,694eog_GatheringProcessingAndMarketing
Gains on Asset Dispositions, Net	507,590us-gaap_GainsLossesOnSalesOfAssets	197,565us-gaap_GainsLossesOnSalesOfAssets	192,660us-gaap_GainsLossesOnSalesOfAssets
Other, Net	54,244eog_OtherNet	56,507eog_OtherNet	41,162eog_OtherNet
Total	18,035,340us-gaap_Revenues	14,487,118us-gaap_Revenues	11,682,636us-gaap_Revenues
Operating Expenses
Lease and Well	1,416,413eog_LeaseAndWell	1,105,978eog_LeaseAndWell	1,000,052eog_LeaseAndWell
Transportation Costs	972,176eog_TransportationCosts	853,044eog_TransportationCosts	601,431eog_TransportationCosts
Gathering and Processing Costs	145,800eog_GatheringAndProcessingCosts	107,871eog_GatheringAndProcessingCosts	97,945eog_GatheringAndProcessingCosts
Exploration Costs	184,388us-gaap_ExplorationExpense	161,346us-gaap_ExplorationExpense	185,569us-gaap_ExplorationExpense
Dry Hole Costs	48,490us-gaap_ResultsOfOperationsDryHoleCosts	74,655us-gaap_ResultsOfOperationsDryHoleCosts	14,970us-gaap_ResultsOfOperationsDryHoleCosts
Impairments	743,575us-gaap_ImpairmentOfOilAndGasProperties	286,941us-gaap_ImpairmentOfOilAndGasProperties	1,270,735us-gaap_ImpairmentOfOilAndGasProperties
Marketing Costs	4,126,060eog_MarketingCosts	3,648,840eog_MarketingCosts	3,035,494eog_MarketingCosts
Depreciation, Depletion and Amortization	3,997,041	3,600,976	3,169,703
General and Administrative	402,010us-gaap_GeneralAndAdministrativeExpense	348,312us-gaap_GeneralAndAdministrativeExpense	331,545us-gaap_GeneralAndAdministrativeExpense
Taxes Other Than Income	757,564eog_TaxesOtherThanIncome	623,944eog_TaxesOtherThanIncome	495,395eog_TaxesOtherThanIncome
Total	12,793,517us-gaap_CostsAndExpenses	10,811,907us-gaap_CostsAndExpenses	10,202,839us-gaap_CostsAndExpenses
Operating Income	5,241,823us-gaap_OperatingIncomeLoss	3,675,211us-gaap_OperatingIncomeLoss	1,479,797us-gaap_OperatingIncomeLoss
Other Income (Expense), Net	(45,050)us-gaap_OtherNonoperatingIncomeExpense	(2,865)us-gaap_OtherNonoperatingIncomeExpense	14,495us-gaap_OtherNonoperatingIncomeExpense
Income Before Interest Expense and Income Taxes	5,196,773	3,672,346	1,494,292
Interest Expense
Incurred	258,628us-gaap_InterestExpenseDebt	284,599us-gaap_InterestExpenseDebt	263,254us-gaap_InterestExpenseDebt
Capitalized	(57,170)us-gaap_InterestCostsCapitalized	(49,139)us-gaap_InterestCostsCapitalized	(49,702)us-gaap_InterestCostsCapitalized
Net Interest Expense	201,458us-gaap_InterestExpense	235,460us-gaap_InterestExpense	213,552us-gaap_InterestExpense
Income Before Income Taxes	4,995,315eog_IncomeBeforeIncomeTaxes	3,436,886eog_IncomeBeforeIncomeTaxes	1,280,740eog_IncomeBeforeIncomeTaxes
Income Tax Provision	2,079,828us-gaap_IncomeTaxExpenseBenefit	1,239,777us-gaap_IncomeTaxExpenseBenefit	710,461us-gaap_IncomeTaxExpenseBenefit
Net Income	2,915,487us-gaap_NetIncomeLoss	2,197,109us-gaap_NetIncomeLoss	570,279us-gaap_NetIncomeLoss
Net Income Per Share
Basic (in dollars per share)	$ 5.36us-gaap_EarningsPerShareBasic	$ 4.07us-gaap_EarningsPerShareBasic	$ 1.07us-gaap_EarningsPerShareBasic
Diluted (in dollars per share)	$ 5.32us-gaap_EarningsPerShareDiluted	$ 4.02us-gaap_EarningsPerShareDiluted	$ 1.05us-gaap_EarningsPerShareDiluted
Dividends Declared per Common Share	$ 0.585	$ 0.375	$ 0.340
Average Number of Common Shares [Abstract]
Basic (in shares)	543,443	540,341	535,155
Diluted (in shares)	548,539	546,227	541,524
Statement Of Comprehensive Income [Abstract]
Net Income	2,915,487	2,197,109	570,279
Other Comprehensive Income (Loss)
Foreign Currency Translation Adjustments	(437,728)	(29,395)	37,739
Foreign Currency Swap Transaction	50eog_ForeignCurrencySwapTransaction	1,652eog_ForeignCurrencySwapTransaction	1,589eog_ForeignCurrencySwapTransaction
Income Tax Related to Foreign Currency Swap Transaction	(670)	1	(404)
Interest Rate Swap Transaction	777eog_InterestSwapTransactions	2,737eog_InterestSwapTransactions	(134)eog_InterestSwapTransactions
Income Tax Related to Interest Rate Swap Transaction	(281)	(981)	48
Other	(1,038)eog_Other	1,925eog_Other	(689)eog_Other
Other Comprehensive Income (Loss)	(438,890)	(24,061)	38,149
Comprehensive Income	$ 2,476,597	$ 2,173,048	$ 608,428

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