Equity and Distributions, Summary of Changes in Outstanding Units (Details)	12 Months Ended			11 Months Ended	12 Months Ended
	Dec. 31, 2012 Common Units (Unrestricted) [Member]	Dec. 31, 2011 Common Units (Unrestricted) [Member]	Dec. 31, 2010 Common Units (Unrestricted) [Member]	Nov. 21, 2010 Common Units (Unrestricted) [Member] Holdings [Member]	Dec. 31, 2012 Restricted Common Units [Member]	Dec. 31, 2011 Restricted Common Units [Member]	Dec. 31, 2010 Restricted Common Units [Member]	Dec. 31, 2012 Common units [Member]	Dec. 31, 2011 Common units [Member]	Dec. 31, 2010 Common units [Member]
Summary of changes in outstanding units [Roll Forward]
Beginning Balance (in units)	877,752,202	840,119,958	603,202,828	139,191,640	3,868,216	3,561,614	2,720,882	881,620,418	843,681,572	605,923,710
Common units issued in connection with underwritten offerings (in units)	9,200,000	10,350,000	37,950,000		0	0	0	9,200,000	10,350,000	37,950,000
Common units issued in connection with at-the-market program (in units)	3,978,545				0			3,978,545
Common units issued in connection with the Holdings Merger (in units)			208,813,454				0			208,813,454
Common units cancelled in connection with the Holdings Merger (in units)			(21,563,177)				0			(21,563,177)
Common units issued in connection with Duncan Merger (in units)		24,277,310				0			24,277,310
Common units issued in connection with DRIP and EUPP (in units)	2,814,660	2,337,904	8,378,053		0	0	0	2,814,660	2,337,904	8,378,053
Common units issued in connection with acquisition of marine shipyard assets (in units)			2,329,639				0			2,329,639
Common units issued to EPCO in exchange for equity interest in trucking business (in units)			523,306				0			523,306
Common units issued in connection with the vesting of unit options (in units)	213,914		193,030		0		0	213,914		193,030
Common units issued in connection with the vesting of restricted common unit awards (in units)	1,316,603	924,108	383,628	3,424	(1,316,603)	(924,108)	(383,628)	0	0	0
Common units issued in connection with the vesting of other types of equity-based awards (in units)	52,168				0			52,168
Restricted common units awards issued (in units)	0	0	0		1,588,738	1,414,630	1,393,925	1,588,738	1,414,630	1,393,925
Forfeiture of restricted common unit awards (in units)	0	0	0		(246,865)	(183,920)	(169,565)	(246,865)	(183,920)	(169,565)
Acquisition and cancellation of treasury units in connection with the vesting of equity-based awards (in units)	(408,241)	(255,276)	(103,241)		0	0	0	(408,241)	(255,276)	(103,241)
Other (in units)		(1,802)	12,438			0	0		(1,802)	12,438
Ending Balance (in units)	894,919,851	877,752,202	840,119,958	139,195,064	3,893,486	3,868,216	3,561,614	898,813,337	881,620,418	843,681,572