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Noncontrolling Interests (Narrative) (Details) - USD ($) shares in Millions, $ in Millions				1 Months Ended		9 Months Ended
	Oct. 29, 2015	Sep. 30, 2015	Dec. 31, 2014	Apr. 30, 2015	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014
Noncontrolling Interest [Line Items]
Number of units sold to public for interests in EnLink				3.4	22.8
Sale of investment in EnLink				$ 85.0	$ 569.0	$ 654.0
Net proceeds of common units sold						13.0	$ 72.0
Distributions to unitholders other than Devon						$ 186.0	$ 187.0
Equity Distribution Agreements [Member]
Noncontrolling Interest [Line Items]
Number of units sold to public for interests in EnLink						0.7	2.4
Net proceeds of common units sold						$ 13.0	$ 72.0
EnLink [Member]
Noncontrolling Interest [Line Items]
Percentage of ownership before stock transactions			49.00%
Percentage of ownership after stock transactions		29.00%
General Partner And EnLink [Member]
Noncontrolling Interest [Line Items]
Distributions to unitholders other than Devon						$ 186.0	$ 187.0
Subsequent Event [Member]
Noncontrolling Interest [Line Items]
EnLink common units acquired in private placement	2.8
EnLink proceeds of private placement transaction	$ 50.0

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