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Equity and Distributions, Issuances of Equity (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jul. 14, 2016
Jul. 13, 2016
Mar. 31, 2016
Net Cash Proceeds from Sale of Common Units [Abstract]          
Net cash proceeds from the issuance of common units $ 1,888.3 $ 944.1      
At-the-Market Registration [Member]          
Registration Statements and Equity Offerings [Line Items]          
Maximum common units authorized for issuance     $ 1,890.0    
Remaining units available for issuance     $ 1,890.0 $ 140.0  
Net Cash Proceeds from Sale of Common Units [Abstract]          
Number of common units issued (in units) 68,645,180 23,258,453      
Gross proceeds from the sale of common units $ 1,660.0 $ 767.1      
Net cash proceeds from the issuance of common units $ 1,650.0 $ 760.0      
At-the-Market Registration [Member] | EPCO and its privately held affiliates [Member]          
Net Cash Proceeds from Sale of Common Units [Abstract]          
Number of common units issued (in units) 3,830,256 3,225,057      
Gross proceeds from the sale of common units $ 100.0 $ 100.0      
Distribution Reinvestment Plan [Member]          
Registration Statements and Equity Offerings [Line Items]          
Maximum common units authorized for issuance (in units) 240,000,000       140,000,000
Remaining units available for issuance (in units) 104,963,257        
Net Cash Proceeds from Sale of Common Units [Abstract]          
Number of common units issued (in units) 10,104,741 5,453,541      
Net cash proceeds from the issuance of common units $ 232.3 $ 177.8      
Distribution Reinvestment Plan [Member] | EPCO and its privately held affiliates [Member]          
Net Cash Proceeds from Sale of Common Units [Abstract]          
Number of common units issued (in units) 4,481,504        
Net cash proceeds from the issuance of common units $ 100.0        
Employee Unit Purchase Plan [Member]          
Registration Statements and Equity Offerings [Line Items]          
Maximum common units authorized for issuance (in units) 8,000,000        
Remaining units available for issuance (in units) 6,492,546        
Net Cash Proceeds from Sale of Common Units [Abstract]          
Number of common units issued (in units) 279,960 183,734      
Net cash proceeds from the issuance of common units $ 6.8 $ 6.3