Derivative Financial Instruments (Schedule Of Gas Processing and Fractionation Open Positions) (Details) (EnLink [Member])	3 Months Ended
	Mar. 31, 2015 MBbls
OPIS Mont Belvieu Texas Ethane Basis Swap Q2 2015-Q4 2016 [Member]
Derivative [Line Items]
Total Volume (MBbls)	1,113
Weighted average price paid	$0.28/gal
Weighted average price received	Index
OPIS Mont Belvieu Texas Propane Basis Swap Q2 2015-Q4 2016 [Member]
Derivative [Line Items]
Total Volume (MBbls)	1,170
Weighted average price paid	Index
Weighted average price received	$0.95/gal
OPIS Mont Belvieu Texas Normal Butane Basis Swap Q2 2015-Q1 2016 [Member]
Derivative [Line Items]
Total Volume (MBbls)	117
Weighted average price paid	Index
Weighted average price received	$0.78/gal
OPIS Mont Belvieu Texas Natural Gasoline Basis Swap Q2 2015-Q1 2016 [Member]
Derivative [Line Items]
Total Volume (MBbls)	101
Weighted average price paid	Index
Weighted average price received	$1.32/gal