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Acquisitions And Divestitures (Schedule Of Unaudited Proforma Information For General Partner and EnLink And GeoSouthern) (Details) - General Partner and EnLink And GeoSouthern [Member] $ / shares in Units, $ in Millions | 9 Months Ended
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Sep. 30, 2014 USD ($) $ / shares
Business Acquisition [Line Items] |
Total operating revenues | $ 14,218
Net earnings (loss) | 2,109
Noncontrolling interests | 68
Net earnings (loss) attributable to Devon | $ 2,041
Net earnings (loss) per common share attributable to Devon | $ / shares | $ 4.98

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