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Acquisitions And Divestitures (Schedule Of Unaudited Proforma Information For General Partner And GeoSouthern) (Details) (General Partner And GeoSouthern [Member], USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
General Partner And GeoSouthern [Member]
Business Acquisition [Line Items]
Total operating revenues	$ 20,213us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember	$ 12,979us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember
Net earnings (loss)	1,716us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember	35us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember
Noncontrolling interests	97dvn_BusinessAcquisitionProFormaNetIncomeLossAttributableToNoncontrollingInterests / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember	45dvn_BusinessAcquisitionProFormaNetIncomeLossAttributableToNoncontrollingInterests / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember
Net earnings (loss) attributable to Devon	$ 1,619us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember	$ (10)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember
Net earnings (loss) per common share attributable to Devon	$ 3.94us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember	$ (0.02)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember

X

- Definition

Business Acquisition, Pro Forma Net Income (Loss) Attributable To Noncontrolling interests.

+ References

No definition available.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

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- Definition

The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

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