Acquisitions And Divestitures (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	0 Months Ended
	Mar. 31, 2015	Apr. 01, 2015
General Partner And EnLink [Member]
Business Acquisition [Line Items]
Close date of acquisition	Mar. 07, 2014
GeoSouthern Intermediate Holdings, LLC [Member]
Business Acquisition [Line Items]
Close date of acquisition	Feb. 28, 2014
EnLink [Member] | Victoria Express Pipeline [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Aggregate purchase price		$ 180
EnLink [Member] | Victoria Express Pipeline [Member] | Subsequent Event [Member] | Forecast [Member]
Business Acquisition [Line Items]
Estimated construction costs assumed		$ 35