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Related Party Transactions (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Revenues - related parties:      
Total revenue - related parties $ 35.5 $ 5.9  
Costs and expenses - related parties:      
Total costs and expenses - related parties 292.3 244.0  
Accounts receivable - related parties:      
Total accounts receivable - related parties 5.5   6.8
Accounts payable - related parties:      
Total accounts payable - related parties 91.0   150.5
Related Party Transactions [Abstract]      
Operating costs and expenses 262.1 214.2  
General and administrative expenses 30.2 29.8  
EPCO and affiliates [Member]
      
Costs and expenses - related parties:      
Total costs and expenses - related parties 235.7 212.7  
Accounts payable - related parties:      
Total accounts payable - related parties 58.3   116.3
Distributions:      
Total cash distributions 214.2 197.1  
Related Party Transactions [Abstract]      
Operating costs and expenses 203.7 181.1  
General and administrative expenses 32.0 31.6  
Relationship with Affiliates [Abstract]      
Number of Units (in units) 341,283,694    
Percentage of Total Units Outstanding (in hundredths) 36.40%    
Unconsolidated affiliates [Member]
      
Revenues - related parties:      
Total revenue - related parties 35.5 5.9  
Costs and expenses - related parties:      
Total costs and expenses - related parties 56.6 31.3  
Accounts receivable - related parties:      
Total accounts receivable - related parties 5.5   6.8
Accounts payable - related parties:      
Total accounts payable - related parties $ 32.7   $ 34.2