Acquisitions And Divestitures (Schedule Of Unaudited Proforma Information For General Partner and EnLink And GeoSouthern) (Details) (General Partner and EnLink And GeoSouthern [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
General Partner and EnLink And GeoSouthern [Member]
Business Acquisition [Line Items]
Total operating revenues	$ 4,372
Net earnings (loss)	347
Noncontrolling interests	18
Net earnings (loss) attributable to Devon	$ 329
Net earnings (loss) per common share attributable to Devon	$ 0.81