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Retirement Plans (Schedule Of Projected Benefit Obligation And Accumulated Benefit Obligation In Excess Of Plan Assets) (Parenthetical) (Details) $ in Millions | Dec. 31, 2019 USD ($)
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Compensation Related Costs [Abstract] |
Accumulated benefit obligation not in excess of plan assets | $ 690

X
- Definition Defined benefit plan, plan with accumulated benefit obligation not in excess of plan assets, accumulated benefit obligation. + References No definition available. + Details
Name: | dvn_DefinedBenefitPlanPlanWithAccumulatedBenefitObligationNotInExcessOfPlanAssetsAccumulatedBenefitObligation
Namespace Prefix: | dvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CompensationRelatedCostsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration