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	$ 5,032	$ 5,032	$ 6,303
Acquired during period		2	57
Impairment		(873)	(1,328)
Goodwill, Ending Balance		3,964	5,032
General Partner And EnLink [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	2,414	2,414	3,685
Acquired during period		2	57
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	1,168
Acquired during period		2	28
Impairment		(473)	(492)
Goodwill, Ending Balance		233	704
General Partner And EnLink [Member] | Louisiana [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance			787
Impairment			(787)
Goodwill, Ending Balance
General Partner And EnLink [Member] | Oklahoma [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	190	190	190
Goodwill, Ending Balance		190	190
General Partner And EnLink [Member] | Crude And Condensate [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	93	93	113
Acquired during period			29
Impairment		(93)	(49)
Goodwill, Ending Balance			93
General Partner And EnLink [Member] | General Partner [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 1,427	1,427	1,427
Impairment		(307)
Goodwill, Ending Balance		$ 1,120	$ 1,427