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Goodwill And Other Intangible Assets (Schedule Of Goodwill By Reporting Units) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2012
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 5,858us-gaap_Goodwill	$ 6,079us-gaap_Goodwill
Acquired during period	3,283us-gaap_GoodwillAcquiredDuringPeriod
Goodwill, Ending Balance	6,303us-gaap_Goodwill	6,079us-gaap_Goodwill
General Partner And Enlink [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	402
Acquired during period	3,283
Goodwill, Ending Balance	3,685
General Partner And Enlink [Member] \| Texas [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	326
Acquired during period	842
Goodwill, Ending Balance	1,168
General Partner And Enlink [Member] \| Louisiana [Member]
Goodwill [Line Items]
Acquired during period	787
Goodwill, Ending Balance	787
General Partner And Enlink [Member] \| Oklahoma [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	76
Acquired during period	114
Goodwill, Ending Balance	190
General Partner And Enlink [Member] \| Ohio River Valley [Member]
Goodwill [Line Items]
Acquired during period	113
Goodwill, Ending Balance	113
General Partner And Enlink [Member] \| General Partner [Member]
Goodwill [Line Items]
Acquired during period	1,427
Goodwill, Ending Balance	$ 1,427