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Related Party Transactions (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Revenues - related parties:          
Total revenue - related parties $ 13.2 $ 7.3 $ 28.8 $ 13.4  
Costs and expenses - related parties:          
Total costs and expenses - related parties 298.8 295.2 609.0 556.3  
Accounts receivable - related parties:          
Total accounts receivable - related parties 2.1   2.1   $ 1.2
Accounts payable - related parties:          
Total accounts payable - related parties 78.8   78.8   $ 84.1
Related Party Transactions [Abstract]          
Operating costs and expenses 270.3 267.1 550.9 499.2  
General and administrative expenses 28.5 28.1 58.1 57.1  
Relationship with Affiliates [Abstract]          
Net cash proceeds from the issuance of common units     $ 1,888.3 $ 944.1  
Number of Designated Units excluded from distributions (in units)         35,380,000
At-the-Market Registration [Member]          
Relationship with Affiliates [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  
Distribution Reinvestment Plan [Member]          
Relationship with Affiliates [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  
EPCO and its privately held affiliates [Member]          
Costs and expenses - related parties:          
Total costs and expenses - related parties 241.4 236.0 478.7 457.9  
Accounts payable - related parties:          
Total accounts payable - related parties $ 67.1   67.1   $ 75.6
Distributions:          
Total cash distributions     $ 525.2 $ 466.7  
Relationship with Affiliates [Abstract]          
Total Number of Units (in units) 685,481,428   685,481,428    
Percentage of Total Units Outstanding (in hundredths) 32.80%   32.80%    
Number of Designated Units excluded from distributions (in units)         35,380,000
Enterprise common units pledged as security (in units) 118,000,000   118,000,000    
EPCO and its privately held affiliates [Member] | At-the-Market Registration [Member]          
Relationship with Affiliates [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  
EPCO and its privately held affiliates [Member] | Distribution Reinvestment Plan [Member]          
Relationship with Affiliates [Abstract]          
Number of common units issued (in units)     4,481,504    
Net cash proceeds from the issuance of common units     $ 100.0    
EPCO and its privately held affiliates [Member] | Administrative Services Agreement [Member]          
Costs and expenses - related parties:          
Total costs and expenses - related parties $ 236.9 231.7 469.6 449.3  
Related Party Transactions [Abstract]          
Operating costs and expenses 210.6 205.9 416.0 396.9  
General and administrative expenses 26.3 25.8 53.6 52.4  
Unconsolidated affiliates [Member]          
Revenues - related parties:          
Total revenue - related parties 13.2 7.3 28.8 13.4  
Costs and expenses - related parties:          
Total costs and expenses - related parties 57.4 $ 59.2 130.3 $ 98.4  
Accounts receivable - related parties:          
Total accounts receivable - related parties 2.1   2.1   $ 1.2
Accounts payable - related parties:          
Total accounts payable - related parties $ 11.7   $ 11.7   $ 8.5