CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL (UNAUDITED) (USD $) In Thousands	Predecessor [Member]	Predecessor [Member] Partners' Capital [Member]	Predecessor [Member] Accumulated Other Comprehensive Loss [Member]	Predecessor [Member] Tax Sharing Note Receivable - Related Party [Member]	Successor [Member]	Successor [Member] Partners' Capital [Member]	Successor [Member] Accumulated Other Comprehensive Loss [Member]	Successor [Member] Tax Sharing Note Receivable - Related Party [Member]
Balance at Dec. 31, 2011	$ 1,792,014	$ 1,809,346	$ (16,176)	$ (1,156)
Tax sharing receivable - Southern Union	288	0	0	288
Net earnings	40,482	40,482	0	0
Other comprehensive income, net of tax	2,913	0	2,913	0
Balance at Mar. 25, 2012	1,835,697	1,849,828	(13,263)	(868)	3,121,485	3,122,353	0	(868)
Tax sharing receivable - Southern Union					289	0	0	289
Net earnings					10,769	10,769	0	0
Other comprehensive income, net of tax					0
Balance at Jun. 30, 2012					3,132,543	3,133,122	0	(579)
Balance at Mar. 31, 2012
Net earnings					29,709
Other comprehensive income, net of tax					0
Balance at Jun. 30, 2012					$ 3,132,543