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Commitments And Contingencies (Schedule Of Commitments And Contingencies) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014
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Purchase Obligations [Member] |
Long-term Purchase Commitment [Line Items] |
2015 | $ 663 us-gaap_ContractualObligationDueInNextTwelveMonths / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_PurchaseObligationsMember
2016 | 809 us-gaap_ContractualObligationDueInSecondYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_PurchaseObligationsMember
2017 | 885 us-gaap_ContractualObligationDueInThirdYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_PurchaseObligationsMember
2018 | 920 us-gaap_ContractualObligationDueInFourthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_PurchaseObligationsMember
2019 | 895 us-gaap_ContractualObligationDueInFifthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_PurchaseObligationsMember
Thereafter | 1,134 us-gaap_ContractualObligationDueAfterFifthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_PurchaseObligationsMember
Total | 5,306 us-gaap_ContractualObligation / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_PurchaseObligationsMember
Drilling And Facility Obligations [Member] |
Long-term Purchase Commitment [Line Items] |
2015 | 234 us-gaap_ContractualObligationDueInNextTwelveMonths / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_DrillingAndFacilityObligationsMember
2016 | 116 us-gaap_ContractualObligationDueInSecondYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_DrillingAndFacilityObligationsMember
2017 | 77 us-gaap_ContractualObligationDueInThirdYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_DrillingAndFacilityObligationsMember
2018 | 13 us-gaap_ContractualObligationDueInFourthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_DrillingAndFacilityObligationsMember
2019 | 1 us-gaap_ContractualObligationDueInFifthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_DrillingAndFacilityObligationsMember
Thereafter | 5 us-gaap_ContractualObligationDueAfterFifthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_DrillingAndFacilityObligationsMember
Total | 446 us-gaap_ContractualObligation / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_DrillingAndFacilityObligationsMember
Operational Agreements [Member] |
Long-term Purchase Commitment [Line Items] |
2015 | 943 us-gaap_ContractualObligationDueInNextTwelveMonths / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OperationalAgreementsMember
2016 | 919 us-gaap_ContractualObligationDueInSecondYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OperationalAgreementsMember
2017 | 890 us-gaap_ContractualObligationDueInThirdYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OperationalAgreementsMember
2018 | 856 us-gaap_ContractualObligationDueInFourthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OperationalAgreementsMember
2019 | 334 us-gaap_ContractualObligationDueInFifthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OperationalAgreementsMember
Thereafter | 1,142 us-gaap_ContractualObligationDueAfterFifthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OperationalAgreementsMember
Total | 5,084 us-gaap_ContractualObligation / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OperationalAgreementsMember
Office And Equipment Leases [Member] |
Long-term Purchase Commitment [Line Items] |
2015 | 72 us-gaap_ContractualObligationDueInNextTwelveMonths / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OfficeAndEquipmentLeasesMember
2016 | 50 us-gaap_ContractualObligationDueInSecondYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OfficeAndEquipmentLeasesMember
2017 | 50 us-gaap_ContractualObligationDueInThirdYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OfficeAndEquipmentLeasesMember
2018 | 45 us-gaap_ContractualObligationDueInFourthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OfficeAndEquipmentLeasesMember
2019 | 39 us-gaap_ContractualObligationDueInFifthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OfficeAndEquipmentLeasesMember
Thereafter | 149 us-gaap_ContractualObligationDueAfterFifthYear / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OfficeAndEquipmentLeasesMember
Total | $ 405 us-gaap_ContractualObligation / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = dvn_OfficeAndEquipmentLeasesMember

X
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation maturing after the fifth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueAfterFifthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation maturing in the fifth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInFifthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation maturing in the fourth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInFourthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation maturing in the next fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation maturing in the second fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInSecondYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation maturing in the third fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInThirdYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=dvn_DrillingAndFacilityObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=dvn_OfficeAndEquipmentLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=dvn_OperationalAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=dvn_PurchaseObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |