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Acquisitions And Divestitures (Schedule Of Revenue And Earnings For EnLink and GeoSouthern) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Acquisition [Line Items]
Total operating revenues	$ 5,336	$ 2,714	$ 13,571	$ 7,773
Total operating expenses	3,562	1,981	9,333	7,797
Operating income (loss)	1,774	733	4,238	(24)
GeoSouthern Intermediate Holdings, LLC [Member]
Business Acquisition [Line Items]
Total operating revenues	634		1,374
Total operating expenses	322		708
Operating income (loss)	312		666
EnLink [Member]
Business Acquisition [Line Items]
Total operating revenues	700		1,670
Total operating expenses	692		1,654
Operating income (loss)	$ 8		$ 16