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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

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