Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	5 Months Ended	7 Months Ended	12 Months Ended							5 Months Ended	12 Months Ended	5 Months Ended	12 Months Ended
	May 25, 2010	Dec. 31, 2010	Dec. 31, 2011 years	Dec. 31, 2009	Dec. 31, 2011 Gathering and Transmission Systems [Member] years	Dec. 31, 2011 Compression Equipment [Member] years	Dec. 31, 2011 Gas Plants And Buildings [Member] years	Dec. 31, 2011 Other property, plant and equipment [Member] years	Dec. 31, 2011 Successor [Member]	May 25, 2010 Predecessor [Member]	Dec. 31, 2010 Change in Tax Status [Member]	May 25, 2010 ETE [Member]	Dec. 31, 2009 ETE [Member]
Property, Plant and Equipment [Line Items]
Reimbursement of all direct and indirect expenses		$ 44,200,000	$ 58,000,000									$ 31,100,000	$ 33,800,000
Depreciation expense	37,100,000	60,100,000	138,400,000	89,700,000
Property, plant and equipment, useful life, minimum					10	3	10	3
Property, plant and equipment, useful life, maximum					20	30	35	15
Maximum asset retirement obligation period, in years			95
Accounting Policies [Abstract]
Inventory		4,400,000	21,200,000
Accrued interest payable		11,800,000	26,800,000
Partnership capitalized interest	900,000	1,400,000	1,200,000	1,700,000
Intangible assets useful life, minimum									20	3
Intangible assets useful life, maximum									30	30
Contributions by employer	500,000	2,000,000	2,700,000	1,300,000
Deferred tax liabilities related to property, plant, and equipment		6,200,000	5,800,000
Current federal tax expense (benefit)	(200,000)	600,000	0	(400,000)							200,000
Deferred federal income tax expense (benefit)	$ 300,000	$ (100,000)	$ (400,000)	$ (1,200,000)
Effective income tax rate			35.00%