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Related Party Transactions (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Revenues - related parties:          
Total revenue - related parties $ 14.2 $ 12.5 $ 94.5 $ 33.2  
Costs and expenses - related parties:          
Total costs and expenses - related parties 395.9 336.3 1,154.2 919.9  
Accounts receivable - related parties:          
Total accounts receivable - related parties 1.6   1.6   $ 1.8
Accounts payable - related parties:          
Total accounts payable - related parties 136.2   136.2   127.3
Related Party Transactions [Abstract]          
Operating costs and expenses 358.5 306.0 1,054.6 830.2  
General and administrative expenses 37.4 30.3 99.6 89.7  
EPCO and its privately held affiliates [Member]          
Costs and expenses - related parties:          
Total costs and expenses - related parties 285.9 262.2 802.8 752.7  
Accounts payable - related parties:          
Total accounts payable - related parties $ 95.2   95.2   99.3
Distributions:          
Total cash distributions     $ 867.4 835.5  
Relationship with Affiliates [Abstract]          
Total Number of Units (in units) 697,260,378   697,260,378    
Percentage of Total Units Outstanding 32.00%   32.00%    
Enterprise common units pledged as security (in units) 108,222,618   108,222,618    
EPCO and its privately held affiliates [Member] | Distribution Reinvestment Plan [Member]          
Relationship with Affiliates [Abstract]          
Gross proceeds from the sale of common units     $ 206.0    
EPCO and its privately held affiliates [Member] | Administrative Services Agreement [Member]          
Costs and expenses - related parties:          
Total costs and expenses - related parties $ 281.6 257.7 790.2 739.1  
Related Party Transactions [Abstract]          
Operating costs and expenses 246.6 230.1 697.6 657.6  
General and administrative expenses 35.0 27.6 92.6 81.5  
Unconsolidated affiliates [Member]          
Revenues - related parties:          
Total revenue - related parties 14.2 12.5 94.5 33.2  
Costs and expenses - related parties:          
Total costs and expenses - related parties 110.0 $ 74.1 351.4 $ 167.2  
Accounts receivable - related parties:          
Total accounts receivable - related parties 1.6   1.6   1.8
Accounts payable - related parties:          
Total accounts payable - related parties $ 41.0   $ 41.0   $ 28.0