Debt Obligations (Details) (USD $) In Millions, unless otherwise specified											12 Months Ended																											12 Months Ended															12 Months Ended																	12 Months Ended				12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2011 Total principal amount of senior debt obligations [Member]	Dec. 31, 2010 Total principal amount of senior debt obligations [Member]	Dec. 31, 2011 Revolving Credit Facility [Member]	Dec. 31, 2011 Senior Notes [Member]		Dec. 31, 2011 Junior Subordinated Notes [Member]	Dec. 31, 2011 EPO Senior Notes B [Member]	Dec. 31, 2010 EPO Senior Notes B [Member]	Dec. 31, 2011 EPO Senior Notes S [Member]	Dec. 31, 2010 EPO Senior Notes S [Member]	Dec. 31, 2011 EPO Senior Notes P [Member]	Dec. 31, 2010 EPO Senior Notes P [Member]	Dec. 31, 2011 EPO $1.75 Billion Multi-Year Revolving Credit Facility [Member]	Dec. 31, 2010 EPO $1.75 Billion Multi-Year Revolving Credit Facility [Member]	Dec. 31, 2011 EPO Senior Notes C [Member]	Dec. 31, 2010 EPO Senior Notes C [Member]	Dec. 31, 2011 EPO Senior Notes T [Member]	Dec. 31, 2010 EPO Senior Notes T [Member]	Dec. 31, 2011 EPO Senior Notes M [Member]	Dec. 31, 2010 EPO Senior Notes M [Member]	Dec. 31, 2011 EPO Senior Notes U [Member]	Dec. 31, 2010 EPO Senior Notes U [Member]	Dec. 31, 2011 EPO Senior Notes O [Member]	Dec. 31, 2010 EPO Senior Notes O [Member]	Dec. 31, 2011 EPO Senior Notes G [Member]	Dec. 31, 2010 EPO Senior Notes G [Member]	Dec. 31, 2011 EPO Senior Notes I [Member]	Dec. 31, 2010 EPO Senior Notes I [Member]	Dec. 31, 2011 EPO Senior Notes X [Member]	Dec. 31, 2010 EPO Senior Notes X [Member]	Dec. 31, 2011 EPO Senior Notes AA [Member]	Dec. 31, 2010 EPO Senior Notes AA [Member]	Jan. 31, 2011 EPO Senior Notes AA [Member]	Dec. 31, 2011 EPO $3.5 Billion Multi-Year Revolving Credit Facility [Member]	Dec. 31, 2010 EPO $3.5 Billion Multi-Year Revolving Credit Facility [Member]	Dec. 31, 2011 EPO Senior Notes L [Member]	Dec. 31, 2010 EPO Senior Notes L [Member]	Dec. 31, 2011 EPO Senior Notes V [Member]	Dec. 31, 2010 EPO Senior Notes V [Member]	Dec. 31, 2011 EPO Senior Notes N [Member]	Dec. 31, 2010 EPO Senior Notes N [Member]	Dec. 31, 2011 EPO Senior Notes Q [Member]	Dec. 31, 2010 EPO Senior Notes Q [Member]	Dec. 31, 2011 EPO Senior Notes Y [Member]	Dec. 31, 2010 EPO Senior Notes Y [Member]	Dec. 31, 2011 EPO Senior Notes CC [Member]	Dec. 31, 2010 EPO Senior Notes CC [Member]	Aug. 31, 2011 EPO Senior Notes CC [Member]	Dec. 31, 2011 EPO Senior Notes D [Member]	Dec. 31, 2010 EPO Senior Notes D [Member]	Dec. 31, 2011 EPO Petal GO Zone Bonds [Member]	Dec. 31, 2010 EPO Petal GO Zone Bonds [Member]	Dec. 31, 2011 EPO Senior Notes H [Member]	Dec. 31, 2010 EPO Senior Notes H [Member]	Dec. 31, 2011 EPO Senior Notes J [Member]	Dec. 31, 2010 EPO Senior Notes J [Member]	Dec. 31, 2011 EPO Senior Notes W [Member]	Dec. 31, 2010 EPO Senior Notes W [Member]	Dec. 31, 2011 EPO Senior Notes R [Member]	Dec. 31, 2010 EPO Senior Notes R [Member]	Dec. 31, 2011 EPO Senior Notes Z [Member]	Dec. 31, 2010 EPO Senior Notes Z [Member]	Dec. 31, 2011 EPO Senior Notes BB [Member]	Dec. 31, 2010 EPO Senior Notes BB [Member]	Jan. 31, 2011 EPO Senior Notes BB [Member]	Dec. 31, 2011 EPO Senior Notes DD [Member]	Dec. 31, 2010 EPO Senior Notes DD [Member]	Aug. 31, 2011 EPO Senior Notes DD [Member]	Oct. 27, 2009 TEPPCO Senior Notes [Member]	Dec. 31, 2011 TEPPCO Senior Notes 1 [Member]	Dec. 31, 2010 TEPPCO Senior Notes 1 [Member]	Dec. 31, 2011 TEPPCO Senior Notes 2 [Member]	Dec. 31, 2010 TEPPCO Senior Notes 2 [Member]	Dec. 31, 2011 TEPPCO Senior Notes 3 [Member]	Dec. 31, 2010 TEPPCO Senior Notes 3 [Member]	Dec. 31, 2011 TEPPCO Senior Notes 4 [Member]	Dec. 31, 2010 TEPPCO Senior Notes 4 [Member]	Dec. 31, 2011 TEPPCO Senior Notes 5 [Member]	Dec. 31, 2010 TEPPCO Senior Notes 5 [Member]	Dec. 31, 2011 DEP Term Loan [Member]	Dec. 31, 2010 DEP Term Loan [Member]	Dec. 31, 2011 DEP $850 Million Multi-Year Revolving Credit Facility [Member]	Dec. 31, 2010 DEP $850 Million Multi-Year Revolving Credit Facility [Member]	Dec. 31, 2011 DEP $400 Million Term Loan Facility [Member]	Dec. 31, 2010 DEP $400 Million Term Loan Facility [Member]	Dec. 31, 2011 EPO Junior Subordinated Notes A [Member]		Dec. 31, 2010 EPO Junior Subordinated Notes A [Member]	Dec. 31, 2011 EPO Junior Subordinated Notes C [Member]		Dec. 31, 2010 EPO Junior Subordinated Notes C [Member]	Dec. 31, 2011 EPO Junior Subordinated Notes B [Member]		Dec. 31, 2010 EPO Junior Subordinated Notes B [Member]	Dec. 31, 2011 TEPPCO Junior Subordinated Notes [Member]	Dec. 31, 2010 TEPPCO Junior Subordinated Notes [Member]	Oct. 27, 2009 TEPPCO Junior Subordinated Notes [Member]	Feb. 29, 2012 EPO Senior Notes EE [Member]
Debt Instrument [Line Items]
Principal Outstanding	$ 14,482.7		$ 13,526.5		$ 12,950.0	$ 11,993.8	$ 150.0	$ 12,800.0	[1]	$ 1,532.7	$ 0	$ 450.0	$ 490.5	$ 490.5	$ 500.0	$ 500.0	$ 0	$ 648.0	$ 350.0	$ 350.0	$ 182.5	$ 182.5	$ 400.0	$ 400.0	$ 237.6	$ 237.6	$ 500.0	$ 500.0	$ 650.0	$ 650.0	$ 250.0	$ 250.0	$ 400.0	$ 400.0	$ 750.0	$ 0		$ 150.0	$ 0	$ 800.0	$ 800.0	$ 349.7	$ 349.7	$ 700.0	$ 700.0	$ 500.0	$ 500.0	$ 1,000.0	$ 1,000.0	$ 650.0	$ 0		$ 500.0	$ 500.0	$ 0	$ 57.5	$ 350.0	$ 350.0	$ 250.0	$ 250.0	$ 399.6	$ 399.6	$ 600.0	$ 600.0	$ 600.0	$ 600.0	$ 750.0	$ 0		$ 600.0	$ 0			$ 9.5	$ 9.5	$ 17.5	$ 17.5	$ 12.4	$ 12.4	$ 0.3	$ 0.3	$ 0.4	$ 0.4	$ 0	$ 282.3	$ 0	$ 106.0	$ 0	$ 400.0	$ 550.0		$ 550.0	$ 285.8		$ 285.8	$ 682.7		$ 682.7	$ 14.2	$ 14.2
Other, non-principal amounts:
Change in fair value of debt hedged in fair value hedging relationship	73.8	[2]	49.3	[2]
Unamortized discounts, net of premiums	(30.0)		(24.0)
Unamortized deferred net gains related to terminated interest rate swaps	2.9	[2]	11.7	[2]
Total other, non-principal amounts	46.7		37.0
Less current maturities of debt	(500.0)	[1]	(282.3)	[1]
Total long-term debt	14,029.4		13,281.2
Interest Rate Terms											fixed	fixed	fixed	fixed	fixed	fixed	variable	variable	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed		variable	variable	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed		fixed	fixed	variable	variable	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed		fixed	fixed			fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	fixed	variable	variable	variable	variable	variable	variable	fixed/variable		fixed/variable	fixed/variable		fixed/variable	fixed/variable		fixed/variable	fixed/variable	fixed/variable
Interest Rate, stated percentage (in hundredths)											7.50%	7.50%	7.625%	7.625%	4.60%	4.60%			6.375%	6.375%	6.125%	6.125%	5.65%	5.65%	5.90%	5.90%	9.75%	9.75%	5.60%	5.60%	5.00%	5.00%	3.70%	3.70%	3.20%	3.20%				6.30%	6.30%	6.65%	6.65%	6.50%	6.50%	5.25%	5.25%	5.20%	5.20%	4.05%	4.05%		6.875%	6.875%			6.65%	6.65%	5.75%	5.75%	7.55%	7.55%	6.125%	6.125%	6.45%	6.45%	5.95%	5.95%		5.70%	5.70%			7.625%	7.625%	6.125%	6.125%	5.90%	5.90%	6.65%	6.65%	7.55%	7.55%							8.375%	[3]		7.00%	[4]		7.034%	[5]
Maturity Date											February 2011	February 2011	February 2012	February 2012	August 2012	August 2012			February 2013	February 2013	February 2013	February 2013	April 2013	April 2013	April 2013	April 2013	January 2014	January 2014	October 2014	October 2014	March 2015	March 2015	June 2015	June 2015	February 1, 2016	February 1, 2016				September 2017	September 2017	April 2018	April 2018	January 2019	January 2019	January 2020	January 2020	September 2020	September 2020	February 15, 2022	February 15, 2022		March 2033	March 2033	August 2034	August 2034	October 2034	October 2034	March 2035	March 2035	April 2038	April 2038	October 2039	October 2039	September 2040	September 2040	February 1, 2041	February 1, 2041		February 15, 2042	February 15, 2042			February 2012	February 2012	February 2013	February 2013	April 2013	April 2013	April 2018	April 2018	April 2038	April 2038	December 2011	December 2011			October 2013	October 2013	August 2066		August 2066	June 2067		June 2067	January 2068		January 2068	June 2067	June 2067
Maturity date of credit facility																	November 2012	November 2012																				September 2016	September 2016																																															October 2013	October 2013
EPO Letter of credit related to commodity derivative instruments	77.5
Maximum borrowing capacity																		1,750																				3,500																																																850		400
Number of extensions to maturity date which may be requested																																						2
Length of extensions to maturity date (in years)																																						1Y
Maximum bank commitments increase																																						500
Aggregate debt principal issued																																					750.0															650.0																	750.0			600.0																														750.0
Debt issued at percent of principal amount (in hundredths)																																					99.901%															99.79%																	99.317%			99.887%
Date through which interest rate is fixed																																																																																										August 2016	[3]		June 2017	[4]		January 2018	[5]
Variable annual interest rate thereafter, variable rate basis																																																																																										3-months LIBOR rate			3-months LIBOR rate			3-months LIBOR rate
Variable interest rate (in hundredths)																																																																																										3.708%	[6]		2.778%	[7]		2.68%	[8]
Minimum variable annual interest rate (in hundredths)																																																																																																7.034%	[8]
Debt instrument principal amount exchanged																																																																									1,660.0																												285.8
Information regarding variable interest rates paid [Abstract]
Variable interest rates paid, minimum (in hundredths)																	0.69%																					1.60%																	0.06%																													1.06%		2.01%		2.26%
Variable interest rates paid, maximum (in hundredths)																	3.25%																					3.63%																	0.33%																													1.42%		2.43%		2.97%
Weighted-average interest rate paid (in hundredths)																	0.79%																					1.64%																	0.20%																													1.21%		2.22%		2.55%
Scheduled Maturities of Debt [Abstract]
2012	500.0						0	500.0	[1]	0
2013	1,200.0						0	1,200.0	[1]	0
2014	1,150.0						0	1,150.0	[1]	0
2015	650.0						0	650.0	[1]	0
2016	900.0						150.0	750.0	[1]	0
After 2016	10,082.7						0	8,550.0	[1]	1,532.7
Total	$ 14,482.7		$ 13,526.5		$ 12,950.0	$ 11,993.8	$ 150.0	$ 12,800.0	[1]	$ 1,532.7	$ 0	$ 450.0	$ 490.5	$ 490.5	$ 500.0	$ 500.0	$ 0	$ 648.0	$ 350.0	$ 350.0	$ 182.5	$ 182.5	$ 400.0	$ 400.0	$ 237.6	$ 237.6	$ 500.0	$ 500.0	$ 650.0	$ 650.0	$ 250.0	$ 250.0	$ 400.0	$ 400.0	$ 750.0	$ 0		$ 150.0	$ 0	$ 800.0	$ 800.0	$ 349.7	$ 349.7	$ 700.0	$ 700.0	$ 500.0	$ 500.0	$ 1,000.0	$ 1,000.0	$ 650.0	$ 0		$ 500.0	$ 500.0	$ 0	$ 57.5	$ 350.0	$ 350.0	$ 250.0	$ 250.0	$ 399.6	$ 399.6	$ 600.0	$ 600.0	$ 600.0	$ 600.0	$ 750.0	$ 0		$ 600.0	$ 0			$ 9.5	$ 9.5	$ 17.5	$ 17.5	$ 12.4	$ 12.4	$ 0.3	$ 0.3	$ 0.4	$ 0.4	$ 0	$ 282.3	$ 0	$ 106.0	$ 0	$ 400.0	$ 550.0		$ 550.0	$ 285.8		$ 285.8	$ 682.7		$ 682.7	$ 14.2	$ 14.2

[1] Long-term and current maturities of debt reflect the classification of such obligations at December 31, 2011 after taking into consideration the long-term refinancing of Senior Notes S and the TEPPCO Senior Notes due February 2012 using proceeds from the issuance of Senior Notes EE on February 15, 2012 (see Note 23).

[2] See Note 6 for information regarding our interest rate hedging activities.

[3] Interest is payable semi-annually in arrears in February and August of each year, which commenced in February 2007.

[4] Interest is payable semi-annually in arrears in June and December of each year, which commenced in December 2009.

[5] Interest is payable semi-annually in arrears in January and July of each year, which commenced in January 2008.

[6] Interest is payable quarterly in arrears in February, May, August and November of each year commencing in November 2016.

[7] Interest is payable quarterly in arrears in March, June, September and December of each year commencing in June 2017.

[8] Interest is payable quarterly in arrears in January, April, July and October of each year commencing in April 2018.