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Related Party Transactions (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Revenues - related parties:          
Total revenue - related parties $ 12.5 $ 15.7 $ 33.2 $ 44.5  
Costs and expenses - related parties:          
Total costs and expenses - related parties 336.3 311.5 919.9 920.5  
Accounts receivable - related parties:          
Total accounts receivable - related parties 3.2   3.2   $ 1.1
Accounts payable - related parties:          
Total accounts payable - related parties 109.0   109.0   105.1
Related Party Transactions [Abstract]          
Operating costs and expenses 306.0 284.5 830.2 835.4  
General and administrative expenses 30.3 27.0 89.7 85.1  
EPCO and its privately held affiliates [Member]          
Costs and expenses - related parties:          
Total costs and expenses - related parties 262.2 242.3 752.7 721.0  
Accounts payable - related parties:          
Total accounts payable - related parties $ 82.7   82.7   88.9
Distributions:          
Total cash distributions     $ 835.5 793.6  
Relationship with Affiliates [Abstract]          
Total Number of Units (in units) 685,514,092   685,514,092    
Percentage of Total Units Outstanding 32.00%   32.00%    
Enterprise common units pledged as security (in units) 48,000,000   48,000,000    
EPCO and its privately held affiliates [Member] | Administrative Services Agreement [Member]          
Costs and expenses - related parties:          
Total costs and expenses - related parties $ 257.7 238.8 $ 739.1 708.4  
Related Party Transactions [Abstract]          
Operating costs and expenses 230.1 212.9 657.6 628.9  
General and administrative expenses 27.6 25.9 81.5 79.5  
Unconsolidated affiliates [Member]          
Revenues - related parties:          
Total revenue - related parties 12.5 15.7 33.2 44.5  
Costs and expenses - related parties:          
Total costs and expenses - related parties 74.1 $ 69.2 167.2 $ 199.5  
Accounts receivable - related parties:          
Total accounts receivable - related parties 3.2   3.2   1.1
Accounts payable - related parties:          
Total accounts payable - related parties $ 26.3   $ 26.3   $ 16.2