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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
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Dec. 31, 2014 | Dec. 31, 2013
General Partner And GeoSouthern [Member] |  |
Business Acquisition [Line Items] |  |
Total operating revenues | $ 20,213 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember | $ 12,979 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember
Net earnings (loss) | 1,716 us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember | 35 us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember
Noncontrolling interests | 97 dvn_BusinessAcquisitionProFormaNetIncomeLossAttributableToNoncontrollingInterests / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember | 45 dvn_BusinessAcquisitionProFormaNetIncomeLossAttributableToNoncontrollingInterests / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember
Net earnings (loss) attributable to Devon | $ 1,619 us-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 | $ 3.94 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember | $ (0.02)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = dvn_GeneralPartnerAndGeosouthernMember

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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) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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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 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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