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Acquisitions And Divestitures (Narrative) (Details)
Share data in Millions, unless otherwise specified
 0 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended
Nov. 13, 2014
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Jun. 30, 2014
Foreign Currency Derivatives [Member]
USD ($)
Jun. 30, 2014
Canadian Conventional Assets Divestiture [Member]
USD ($)
Jun. 30, 2014
Canadian Conventional Assets Divestiture [Member]
CAD
Mar. 31, 2014
Canadian Conventional Assets Divestiture [Member]
USD ($)
Mar. 31, 2014
Canadian Conventional Assets Divestiture [Member]
CAD
Dec. 31, 2014
Canadian Conventional Assets Divestiture [Member]
USD ($)
Aug. 29, 2014
LINN Energy [Member]
USD ($)
Mar. 07, 2014
General Partner And Enlink [Member]
USD ($)
Dec. 31, 2014
General Partner And Enlink [Member]
Feb. 28, 2014
GeoSouthern Intermediate Holdings, LLC [Member]
USD ($)
acre
Dec. 31, 2014
GeoSouthern Intermediate Holdings, LLC [Member]
Nov. 02, 2014
EnLink [Member]
Gulf Coast Natural Gas Pipeline [Member]
USD ($)
Oct. 22, 2014
EnLink [Member]
Appalachian Compression, LLC and E2 Energy Services, LLC [Member]
USD ($)
Dec. 31, 2014
General Partner [Member]
Dec. 31, 2014
General Partner [Member]
Public Unitholders [Member]
Dec. 31, 2014
EnLink [Member]
Mar. 31, 2014
EnLink [Member]
Dec. 31, 2014
EnLink [Member]
Public Unitholders [Member]
Mar. 31, 2014
EnLink [Member]
Public Unitholders [Member]
Dec. 31, 2014
EnLink [Member]
General Partner [Member]
Mar. 31, 2014
EnLink [Member]
General Partner [Member]
Dec. 31, 2014
EnLink Holdings [Member]
EnLink [Member]
Dec. 31, 2014
EnLink Holdings [Member]
General Partner [Member]
Jun. 30, 2014
Term Loan [Member]
USD ($)
Business Acquisition [Line Items]                                                          
Cash payment to acquire interest                         $ 100,000,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= dvn_GeneralPartnerAndEnlinkMember		         $ 163,000,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= dvn_AppalachianCompressionLlcAndE2EnergyServicesLlcMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember		                      
Ownership percentage                                     70.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_GeneralPartnerMember		 30.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= dvn_PublicUnitholdersMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_GeneralPartnerMember		 49.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= dvn_EnlinkMember		 52.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= dvn_EnlinkMember		 43.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= dvn_PublicUnitholdersMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= dvn_EnlinkMember		 41.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= dvn_PublicUnitholdersMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= dvn_EnlinkMember		 8.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= us-gaap_GeneralPartnerMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= dvn_EnlinkMember		 7.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= us-gaap_GeneralPartnerMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= dvn_EnlinkMember		 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= dvn_EnlinkMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= dvn_EnlinkHoldingsMember		 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= us-gaap_GeneralPartnerMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= dvn_EnlinkHoldingsMember		  
Close date of acquisition                           Mar. 07, 2014   Feb. 28, 2014                          
Aggregate purchase price                             6,000,000,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= dvn_GeosouthernIntermediateHoldingsLlcMember		   234,000,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= dvn_GulfCoastNaturalGasPipelineMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember		 194,000,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= dvn_AppalachianCompressionLlcAndE2EnergyServicesLlcMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember		                      
Common units value                                   31,200,000us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= dvn_AppalachianCompressionLlcAndE2EnergyServicesLlcMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember		                      
Units issued for acquisition                                   1.0us-gaap_PartnersCapitalAccountUnitsAcquisitions
/ us-gaap_BusinessAcquisitionAxis
= dvn_AppalachianCompressionLlcAndE2EnergyServicesLlcMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember		                      
Number of acres acquired                             82,000dvn_NumberOfAcresAcquired
/ us-gaap_BusinessAcquisitionAxis
= dvn_GeosouthernIntermediateHoldingsLlcMember		                            
Gains and losses on asset sales     1,072,000,000us-gaap_GainLossOnDispositionOfAssets1 (9,000,000)us-gaap_GainLossOnDispositionOfAssets1 13,000,000us-gaap_GainLossOnDispositionOfAssets1           1,100,000,000us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_CanadianConventionalAssetsDivestitureMember		 0us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_LinnEnergyMember		                                  
Gains and losses on assets sales after tax                     600,000,000dvn_GainLossOnDispositionOfAssetsAfterTax
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_CanadianConventionalAssetsDivestitureMember		                                    
Derecognition in goodwill allocated to sold assets                     (700,000,000)us-gaap_GoodwillPeriodIncreaseDecrease
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_CanadianConventionalAssetsDivestitureMember		                                    
Foreign currency exchange loss   (84,000,000)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax                                                      
Loss on derivative           29,000,000us-gaap_DerivativeLossOnDerivative
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember		                                              
Foreign earnings repatriated   2,800,000,000us-gaap_ForeignEarningsRepatriated 2,800,000,000us-gaap_ForeignEarningsRepatriated 4,300,000,000us-gaap_ForeignEarningsRepatriated                                                  
Proceeds from property and equipment divestitures     5,120,000,000us-gaap_ProceedsFromSaleOfProductiveAssets 419,000,000us-gaap_ProceedsFromSaleOfProductiveAssets 1,468,000,000us-gaap_ProceedsFromSaleOfProductiveAssets   2,800,000,000us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_CanadianConventionalAssetsDivestitureMember		 3,125,000,000us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_CanadianConventionalAssetsDivestitureMember		 142,000,000us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_CanadianConventionalAssetsDivestitureMember		 155,000,000us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_CanadianConventionalAssetsDivestitureMember		   2,200,000,000us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_LinnEnergyMember		                                  
Proceeds after tax from property and equipment divestitures                       2,000,000,000dvn_ProceedsAfterTaxFromPropertyAndEquipmentDivestitures
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_LinnEnergyMember		                                  
Asset retirement obligation transferred     953,000,000dvn_AssetRetirementObligationLiabilitiesAssumedByOthers 28,000,000dvn_AssetRetirementObligationLiabilitiesAssumedByOthers             700,000,000dvn_AssetRetirementObligationLiabilitiesAssumedByOthers
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_CanadianConventionalAssetsDivestitureMember		 200,000,000dvn_AssetRetirementObligationLiabilitiesAssumedByOthers
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= dvn_LinnEnergyMember		                                  
Repayment of commercial paper   700,000,000us-gaap_RepaymentsOfCommercialPaper                                                      
Long term debt repayment     7,189,000,000us-gaap_RepaymentsOfLongTermDebt   750,000,000us-gaap_RepaymentsOfLongTermDebt                                               2,000,000,000us-gaap_RepaymentsOfLongTermDebt
/ us-gaap_DebtInstrumentAxis
= dvn_TermLoanMember
Early retirement of senior notes $ 1,900,000,000us-gaap_EarlyRepaymentOfSeniorDebt