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Noncontrolling Interests (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Mar. 31, 2014
Feb. 28, 2015
Mar. 07, 2014
Mar. 16, 2015
Apr. 30, 2015
Feb. 17, 2015
Noncontrolling Interest [Line Items]                
Number of units sold to public for interests in EnLink 22.8dvn_SaleOfUnitsFromDivestitureOfInterestInConsolidatedSubsidiaries              
Sale of investment in EnLink $ 569us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries $ 569us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries             
EnLink [Member]                
Noncontrolling Interest [Line Items]                
Percentage of ownership before stock transaction   49.00%us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction
/ dei_LegalEntityAxis
= dvn_EnlinkMember
           
Percentage of ownership after stock transaction   34.00%us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction
/ dei_LegalEntityAxis
= dvn_EnlinkMember
           
EnLink Midstream Holdings [Member] | EnLink [Member]                
Noncontrolling Interest [Line Items]                
Ownership interest percentage acquired       25.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= dvn_EnlinkMidstreamHoldingsMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember
      25.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= dvn_EnlinkMidstreamHoldingsMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember
Common units value       925us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= dvn_EnlinkMidstreamHoldingsMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember
       
General Partner And EnLink [Member]                
Noncontrolling Interest [Line Items]                
Cash payment to acquire interest         100us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= dvn_GeneralPartnerAndEnlinkMember
     
Coronado Midstream Holdings LLC [Member] | EnLink [Member]                
Noncontrolling Interest [Line Items]                
Cash payment to acquire interest           242us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= dvn_CoronadoMidstreamHoldingsLlcMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember
   
Common units value 360us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= dvn_CoronadoMidstreamHoldingsLlcMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember
        360us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= dvn_CoronadoMidstreamHoldingsLlcMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember
   
Aggregate purchase price 602us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= dvn_CoronadoMidstreamHoldingsLlcMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember
             
Common units sold, shares 13.4us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_BusinessAcquisitionAxis
= dvn_CoronadoMidstreamHoldingsLlcMember
/ dei_LegalEntityAxis
= dvn_EnlinkMember
             
Subsequent Event [Member]                
Noncontrolling Interest [Line Items]                
Number of units sold to public for interests in EnLink             3.4dvn_SaleOfUnitsFromDivestitureOfInterestInConsolidatedSubsidiaries
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Sale of investment in EnLink             $ 85us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember