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Related Party Transactions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenues - related parties: |  |  |
Total revenue - related parties | $ 107.7 | $ 45.0 | $ 56.7
Costs and expenses - related parties: |  |  |
Operating costs and expenses | 1,406.1 | 1,112.8 | 1,104.0
General and administrative expenses | 130.9 | 121.5 | 113.1
Total costs and expenses - related parties | 1,537.0 | 1,234.3 | 1,217.1
Accounts receivable - related parties: |  |  |
Total accounts receivable - related parties | 3.5 | 1.8 |
Accounts payable - related parties: |  |  |
Total accounts payable - related parties | 140.2 | 127.3 |
At-the-Market Registration [Member] |  |  |
Relationship with Affiliates [Abstract] |  |  |
Gross proceeds from the sale of common units |  | 603.1 | 2,170.0
EPCO and its privately held affiliates [Member] |  |  |
Costs and expenses - related parties: |  |  |
Total costs and expenses - related parties | 1,089.6 | 1,010.9 | 963.2
Accounts payable - related parties: |  |  |
Total accounts payable - related parties | 116.3 | 99.3 |
Distributions: |  |  |
Total cash distributions | $ 1,160.0 | 1,120.0 | 1,070.0
Relationship with Affiliates [Abstract] |  |  |
Number of Units (in units) | 697,529,483 |  |
Percentage of Total Units Outstanding | 31.90% |  |
Enterprise common units pledged as security (in units) | 108,222,618 |  |
EPCO and its privately held affiliates [Member] | At-the-Market Registration [Member] |  |  |
Relationship with Affiliates [Abstract] |  |  |
Gross proceeds from the sale of common units |  |  | 100.0
EPCO and its privately held affiliates [Member] | Distribution Reinvestment Plan [Member] |  |  |
Relationship with Affiliates [Abstract] |  |  |
Gross proceeds from the sale of common units | $ 213.0 | 100.0 | 100.0
EPCO and its privately held affiliates [Member] | Administrative Services Agreement [Member] |  |  |
Costs and expenses - related parties: |  |  |
Operating costs and expenses | 948.8 | 882.1 | 840.7
General and administrative expenses | 124.2 | 110.4 | 105.3
Total costs and expenses - related parties | 1,073.0 | 992.5 | 946.0
Unconsolidated affiliates [Member] |  |  |
Revenues - related parties: |  |  |
Total revenue - related parties | 107.7 | 45.0 | 56.7
Costs and expenses - related parties: |  |  |
Total costs and expenses - related parties | 447.4 | 223.4 | 253.9
Accounts receivable - related parties: |  |  |
Total accounts receivable - related parties | 3.5 | 1.8 |
Accounts payable - related parties: |  |  |
Total accounts payable - related parties | 23.9 | 28.0 |
Unconsolidated affiliates [Member] | Seaway Crude Pipeline Company [Member] |  |  |
Revenues - related parties: |  |  |
Total revenue - related parties | 74.4 | 19.6 | 36.3
Costs and expenses - related parties: |  |  |
Total costs and expenses - related parties | 163.2 | 98.8 | 161.2
Unconsolidated affiliates [Member] | Venice Energy Service Company, L.L.C. [Member] |  |  |
Costs and expenses - related parties: |  |  |
Total costs and expenses - related parties | 157.9 |  |
Unconsolidated affiliates [Member] | K/D/S Promix, L.L.C. [Member] |  |  |
Revenues - related parties: |  |  |
Total revenue - related parties | 9.5 | 7.8 | 7.0
Costs and expenses - related parties: |  |  |
Total costs and expenses - related parties | 31.9 | 27.8 | 27.1
Unconsolidated affiliates [Member] | Texas Express Pipeline LLC [Member] |  |  |
Costs and expenses - related parties: |  |  |
Total costs and expenses - related parties | 57.6 | 29.5 | 22.8
Unconsolidated affiliates [Member] | Eagle Ford Pipeline LLC [Member] |  |  |
Costs and expenses - related parties: |  |  |
Total costs and expenses - related parties | 18.5 | 42.8 | 36.2
Unconsolidated affiliates [Member] | Management/Operator Fees [Member] | Other investments in unconsolidated subsidiaries [Member] |  |  |
Costs and expenses - related parties: |  |  |
Total costs and expenses - related parties | $ (11.6) | $ (10.6) | $ (10.7)

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