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Equity and Distributions, Issuances of Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 0 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Distribution Reinvestment Plan [Member]
Mar. 31, 2013
Distribution Reinvestment Plan [Member]
May 07, 2014
Distribution Reinvestment Plan [Member]
EPCO and affiliates [Member]
Mar. 31, 2014
Distribution Reinvestment Plan [Member]
EPCO and affiliates [Member]
Mar. 31, 2014
Employee Unit Purchase Plan [Member]
Mar. 31, 2013
Employee Unit Purchase Plan [Member]
Mar. 31, 2014
Shelf Registration 2013 [Member]
Mar. 31, 2014
2013 At-the-Market Registration [Member]
Registration Statements and Equity Offerings [Line Items]                    
Maximum common units authorized for issuance                   $ 1,250
Maximum common units authorized for issuance (in units)     70,000,000       4,000,000      
Remaining units available for issuance                   1,250
Remaining units available for issuance (in units)     17,173,693       3,682,164      
Net Cash Proceeds from Sale of Common Units [Abstract]                    
Number of common units issued (in units)     1,307,185 1,243,360   403,315 31,280 31,869    
Net cash proceeds from the issuance of common units 83.0 554.1 81.0 65.7 25.0 25.0 2.0 1.8    
Senior notes issued under universal shelf registration                 $ 2,000