Equity and Distributions, Issuances of Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended								1 Months Ended		12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 EPCO and affiliates [Member]	Dec. 31, 2013 Distribution Reinvestment Plan [Member]	Dec. 31, 2012 Distribution Reinvestment Plan [Member]	Dec. 31, 2011 Distribution Reinvestment Plan [Member]	Dec. 31, 2013 Distribution Reinvestment Plan [Member] EPCO and affiliates [Member]	Dec. 31, 2013 Employee Unit Purchase Plan [Member]	Dec. 31, 2012 Employee Unit Purchase Plan [Member]	Dec. 31, 2011 Employee Unit Purchase Plan [Member]	Sep. 30, 2013 Employee Unit Purchase Plan [Member]	Feb. 28, 2013 Shelf Registration 2010 [Member]	Sep. 30, 2012 Shelf Registration 2010 [Member]	Dec. 31, 2011 Shelf Registration 2010 [Member]	Nov. 30, 2013 Shelf Registration 2013 [Member]	Dec. 31, 2012 2012 At-the-Market Registration [Member]	Dec. 31, 2013 2013 At-the-Market Registration [Member]	Oct. 15, 2013 2013 At-the-Market Registration [Member]	Mar. 31, 2012 2013 At-the-Market Registration [Member]
Registration Statements and Equity Offerings [Line Items]
Maximum common units authorized for issuance																			$ 1,250	$ 1,000
Maximum common units authorized for issuance (in units)					70,000,000				4,000,000			440,879
Remaining units available for issuance																		1,250
Remaining units available for issuance (in units)					18,480,878				3,713,444
Net Cash Proceeds from Sale of Common Units [Abstract]
Number of common units issued (in units)					5,012,414	2,679,848	2,241,589	1,749,498	141,713	134,812	96,315		9,200,000	9,200,000	10,350,000	9,200,000	3,978,545	7,624,689
Over-allotment of common units included in offering (in units)													1,200,000	1,200,000	1,350,000	1,200,000
Offering price of common unit (in dollars per share)													$ 54.56	$ 53.07	$ 44.68	$ 62.05
Gross proceeds from the sale of common units																	205.4	460.4
Net cash proceeds from the issuance of common units	1,792.0	816.8	542.9		287.6	132.6	90.4	100.0	8.5	7.1	4.0		486.6	473.3	448.5	553.0	203.8	456.3
Senior notes issued under universal shelf registration													$ 2,250	$ 2,500	$ 2,750
Percentage of Total Units Outstanding (in hundredths)				36.40%