Derivative Financial Instruments (Schedule Of Gas Processing and Fractionation Open Positions) (Details) - EnLink [Member]	3 Months Ended
Mar. 31, 2016 $ / gal MBbls
OPIS Mont Belvieu Texas Ethane Basis Swap Q2 2016-Q4 2016 [Member]
Derivative [Line Items]
Volume (MBbls) \| MBbls	415
Weighted average price paid \| $ / gal	0.29
Weighted average price received	Index
OPIS Mont Belvieu Texas Propane Basis Swap Q2 2016-Q1 2017 [Member]
Derivative [Line Items]
Volume (MBbls) \| MBbls	744
Weighted average price paid	Index
Weighted average price received \| $ / gal	0.74

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration