Goodwill And Other Intangible Assets (Schedule Of General Partner And EnLink Goodwill By Reporting Units) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2016		Dec. 31, 2015
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 3,337	$ 3,337
Acquired during period		2
Impairment		(873)
Goodwill, Ending Balance		2,383	[1]	$ 3,337
General Partner And EnLink [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	2,414	2,414
Acquired during period		2
Impairment	(873)	(873)		(1,328)
Goodwill, Ending Balance		1,543		2,414
General Partner And EnLink [Member] | Texas [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	704	704
Acquired during period		2
Impairment		(473)
Goodwill, Ending Balance		233		704
General Partner And EnLink [Member] | Oklahoma [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	190	190
Goodwill, Ending Balance		190		190
General Partner And EnLink [Member] | Crude And Condensate [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	93	93
Impairment		(93)
Goodwill, Ending Balance				93
General Partner And EnLink [Member] | General Partner [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 1,427	1,427
Impairment		(307)
Goodwill, Ending Balance		$ 1,120		$ 1,427

[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.