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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
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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 |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndEnlinkMember |  |  |  |  | $ 163,000,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,000,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember |  | 234,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dvn_GulfCoastNaturalGasPipelineMember / dei_LegalEntityAxis = dvn_EnlinkMember | 194,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dvn_AppalachianCompressionLlcAndE2EnergyServicesLlcMember / dei_LegalEntityAxis = dvn_EnlinkMember |  |  |  |  |  |  |  |  |  |  |
Common units value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 31,200,000 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = dvn_AppalachianCompressionLlcAndE2EnergyServicesLlcMember / dei_LegalEntityAxis = dvn_EnlinkMember |  |  |  |  |  |  |  |  |  |  |
Units issued for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.0 us-gaap_PartnersCapitalAccountUnitsAcquisitions / us-gaap_BusinessAcquisitionAxis = dvn_AppalachianCompressionLlcAndE2EnergyServicesLlcMember / dei_LegalEntityAxis = dvn_EnlinkMember |  |  |  |  |  |  |  |  |  |  |
Number of acres acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 82,000 dvn_NumberOfAcresAcquired / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gains and losses on asset sales |  |  | 1,072,000,000 us-gaap_GainLossOnDispositionOfAssets1 | (9,000,000)us-gaap_GainLossOnDispositionOfAssets1 | 13,000,000 us-gaap_GainLossOnDispositionOfAssets1 |  |  |  |  |  | 1,100,000,000 us-gaap_GainLossOnDispositionOfAssets1 / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_CanadianConventionalAssetsDivestitureMember | 0 us-gaap_GainLossOnDispositionOfAssets1 / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_LinnEnergyMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gains and losses on assets sales after tax |  |  |  |  |  |  |  |  |  |  | 600,000,000 dvn_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 |  |  |  |  |  | 29,000,000 us-gaap_DerivativeLossOnDerivative / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign earnings repatriated |  | 2,800,000,000 us-gaap_ForeignEarningsRepatriated | 2,800,000,000 us-gaap_ForeignEarningsRepatriated | 4,300,000,000 us-gaap_ForeignEarningsRepatriated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from property and equipment divestitures |  |  | 5,120,000,000 us-gaap_ProceedsFromSaleOfProductiveAssets | 419,000,000 us-gaap_ProceedsFromSaleOfProductiveAssets | 1,468,000,000 us-gaap_ProceedsFromSaleOfProductiveAssets |  | 2,800,000,000 us-gaap_ProceedsFromSaleOfProductiveAssets / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_CanadianConventionalAssetsDivestitureMember | 3,125,000,000 us-gaap_ProceedsFromSaleOfProductiveAssets / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_CanadianConventionalAssetsDivestitureMember | 142,000,000 us-gaap_ProceedsFromSaleOfProductiveAssets / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_CanadianConventionalAssetsDivestitureMember | 155,000,000 us-gaap_ProceedsFromSaleOfProductiveAssets / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_CanadianConventionalAssetsDivestitureMember |  | 2,200,000,000 us-gaap_ProceedsFromSaleOfProductiveAssets / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_LinnEnergyMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds after tax from property and equipment divestitures |  |  |  |  |  |  |  |  |  |  |  | 2,000,000,000 dvn_ProceedsAfterTaxFromPropertyAndEquipmentDivestitures / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_LinnEnergyMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset retirement obligation transferred |  |  | 953,000,000 dvn_AssetRetirementObligationLiabilitiesAssumedByOthers | 28,000,000 dvn_AssetRetirementObligationLiabilitiesAssumedByOthers |  |  |  |  |  |  | 700,000,000 dvn_AssetRetirementObligationLiabilitiesAssumedByOthers / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_CanadianConventionalAssetsDivestitureMember | 200,000,000 dvn_AssetRetirementObligationLiabilitiesAssumedByOthers / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = dvn_LinnEnergyMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of commercial paper |  | 700,000,000 us-gaap_RepaymentsOfCommercialPaper |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt repayment |  |  | 7,189,000,000 us-gaap_RepaymentsOfLongTermDebt |  | 750,000,000 us-gaap_RepaymentsOfLongTermDebt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = dvn_TermLoanMember
Early retirement of senior notes | $ 1,900,000,000 us-gaap_EarlyRepaymentOfSeniorDebt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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