Property, Plant and Equipment (Schedule of Property, Plant and Equipment Other) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Capitalized Costs Relating To Oil And Gas Producing Activities By Geographic Area [Line Items]
Total midstream and other	$ 11,075	$ 10,300
Total accumulated DD&A	(3,222)	(2,765)
Midstream and other property and equipment, net	7,853	7,535	[1]
Devon [Member]
Capitalized Costs Relating To Oil And Gas Producing Activities By Geographic Area [Line Items]
Total midstream and other	1,955	1,919
Total accumulated DD&A	(689)	(641)
General Partner And EnLink [Member]
Capitalized Costs Relating To Oil And Gas Producing Activities By Geographic Area [Line Items]
Total midstream and other	9,120	8,381
Total accumulated DD&A	$ (2,533)	$ (2,124)

[1] Prior year amounts have been recast due to change in accounting principle. See Note 2 in “Item 8. Financial Statements and Supplementary Data” of this report.