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Related Party Transactions (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Revenues - related parties:      
Total revenue - related parties $ 67.3 $ 107.7 $ 45.0
Costs and expenses - related parties:      
Operating costs and expenses 1,412.0 1,406.1 1,112.8
General and administrative expenses 136.4 130.9 121.5
Total costs and expenses - related parties 1,548.4 1,537.0 1,234.3
Accounts receivable - related parties:      
Total accounts receivable - related parties 2.5 3.5  
Accounts payable - related parties:      
Total accounts payable - related parties 162.3 140.2  
EPCO and its privately held affiliates [Member]      
Costs and expenses - related parties:      
Total costs and expenses - related parties 1,145.3 1,089.6 1,010.9
Accounts payable - related parties:      
Total accounts payable - related parties 143.7 116.3  
Distributions:      
Total cash distributions $ 1,190.0 1,160.0 1,120.0
Relationship with Affiliates [Abstract]      
Number of Units (in units) 700,783,776    
Percentage of Total Units Outstanding 32.00%    
Enterprise common units pledged as security (in units) 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 $ 29.0 213.0 100.0
EPCO and its privately held affiliates [Member] | Administrative Services Agreement [Member]      
Costs and expenses - related parties:      
Operating costs and expenses 1,000.2 948.8 882.1
General and administrative expenses 127.6 124.2 110.4
Total costs and expenses - related parties 1,127.8 1,073.0 992.5
EPCO and its privately held affiliates [Member] | Related Party Operating Leases [Member]      
Costs and expenses - related parties:      
Total costs and expenses - related parties 14.9 13.9 15.8
Unconsolidated affiliates [Member]      
Revenues - related parties:      
Total revenue - related parties 67.3 107.7 45.0
Costs and expenses - related parties:      
Total costs and expenses - related parties 403.1 447.4 223.4
Accounts receivable - related parties:      
Total accounts receivable - related parties 2.5 3.5  
Accounts payable - related parties:      
Total accounts payable - related parties 18.6 23.9  
Unconsolidated affiliates [Member] | Seaway Crude Holdings LLC [Member]      
Revenues - related parties:      
Total revenue - related parties 42.7 74.4 19.6
Costs and expenses - related parties:      
Total costs and expenses - related parties 194.5 163.2 98.8
Unconsolidated affiliates [Member] | Venice Energy Service Company, L.L.C. [Member]      
Costs and expenses - related parties:      
Total costs and expenses - related parties 89.2 157.9  
Unconsolidated affiliates [Member] | K/D/S Promix, L.L.C. [Member]      
Revenues - related parties:      
Total revenue - related parties 9.1 9.5 7.8
Costs and expenses - related parties:      
Total costs and expenses - related parties 34.8 31.9 27.8
Unconsolidated affiliates [Member] | Texas Express Pipeline LLC [Member]      
Costs and expenses - related parties:      
Total costs and expenses - related parties 33.5 57.6 29.5
Unconsolidated affiliates [Member] | Eagle Ford Pipeline LLC [Member]      
Costs and expenses - related parties:      
Total costs and expenses - related parties 36.0 18.5 42.8
Unconsolidated affiliates [Member] | Management/Operator Fees [Member] | Other investments in unconsolidated subsidiaries [Member]      
Costs and expenses - related parties:      
Total costs and expenses - related parties $ (9.9) $ (11.6) $ (10.6)