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Retirement Plans (Schedule Of Expense Related To These Defined Contribution Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Expense related to defined contribution plans	$ 69us-gaap_DefinedContributionPlanCostRecognized	$ 67us-gaap_DefinedContributionPlanCostRecognized	$ 59us-gaap_DefinedContributionPlanCostRecognized
401(k) Plan And Enhanced Contribution Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expense related to defined contribution plans	49us-gaap_DefinedContributionPlanCostRecognized / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = dvn_FourZeroOneKPlanAndEnhancedContributionPlansMember	41us-gaap_DefinedContributionPlanCostRecognized / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = dvn_FourZeroOneKPlanAndEnhancedContributionPlansMember	36us-gaap_DefinedContributionPlanCostRecognized / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = dvn_FourZeroOneKPlanAndEnhancedContributionPlansMember
Canadian Pension And Savings Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expense related to defined contribution plans	$ 20us-gaap_DefinedContributionPlanCostRecognized / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = dvn_CanadianPensionAndSavingsPlansMember	$ 26us-gaap_DefinedContributionPlanCostRecognized / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = dvn_CanadianPensionAndSavingsPlansMember	$ 23us-gaap_DefinedContributionPlanCostRecognized / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = dvn_CanadianPensionAndSavingsPlansMember

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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

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