Goodwill And Other Intangible Assets (Summary Of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 5,032	$ 6,303
Acquired during period	2	57
Asset divestitures	(197)
Impairment	(873)	(1,328)
Goodwill, Ending Balance	3,964	5,032
United States [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	2,618	2,618
Asset divestitures	(197)
Goodwill, Ending Balance	2,421	2,618
General Partner And EnLink [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	2,414	3,685
Acquired during period	2	57
Impairment	(873)	(1,328)
Goodwill, Ending Balance	$ 1,543	$ 2,414