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Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Commitments And Contingencies [Abstract] |  |  |
Obligation related to the purchase of condensate, year of expiration | 2021 |  |
Total rental expense, including certain office space and equipment under operating lease agreements, net of sub-lease income | $ 64 us-gaap_LeaseAndRentalExpense | $ 26 us-gaap_LeaseAndRentalExpense | $ 42 us-gaap_LeaseAndRentalExpense

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- Definition Purchase Obligations Related To Purchase Of Condensate In Years. + References No definition available. + Details
Name: | dvn_PurchaseObligationsRelatedToPurchaseOfCondensateInYears
Namespace Prefix: | dvn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration