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Equity and Distributions, Issuances of Equity (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Net Cash Proceeds from Sale of Common Units [Abstract] |  |
Net cash proceeds from the issuance of common units | $ 757.2 | $ 1,888.3
At-the-Market Registration [Member] |  |
Registration Statements and Equity Offerings [Line Items] |  |
Maximum common units authorized for issuance | 1,890.0 |
Remaining units available for issuance | $ 864.4 |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |
Number of common units issued (in units) | 20,857,006 | 68,645,180
Gross proceeds from the sale of common units | $ 577.3 | $ 1,660.0
Net cash proceeds from the issuance of common units | $ 571.8 | $ 1,650.0
At-the-Market Registration [Member] | EPCO and its privately held affiliates [Member] |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |
Number of common units issued (in units) |  | 3,830,256
Gross proceeds from the sale of common units |  | $ 100.0
Distribution Reinvestment Plan [Member] |  |
Registration Statements and Equity Offerings [Line Items] |  |
Maximum common units authorized for issuance (in units) | 240,000,000 |
Remaining units available for issuance (in units) | 92,455,606 |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |
Number of common units issued (in units) | 6,802,889 | 10,104,741
Net cash proceeds from the issuance of common units | $ 179.0 | $ 232.3
Distribution Reinvestment Plan [Member] | EPCO and its privately held affiliates [Member] |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |
Net cash proceeds from the issuance of common units |  | $ 100.0
Employee Unit Purchase Plan [Member] |  |
Registration Statements and Equity Offerings [Line Items] |  |
Maximum common units authorized for issuance (in units) | 8,000,000 |
Remaining units available for issuance (in units) | 6,032,683 |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |
Number of common units issued (in units) | 232,792 | 279,960
Net cash proceeds from the issuance of common units | $ 6.4 | $ 6.8

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- Definition The remaining number of limited partner units available for issuance, after taking into account limited partner units issued to date. The limited partners are partners of a publicly traded limited partnership or master limited partnership. Limited partners have limited liability and do not manage the partnership. + References No definition available. + Details
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- Definition The dollar value of the remaining amount of limited partner units available for issuance, after taking into account limited partner units issued to date. The limited partners are partners of a publicly traded limited partnership or master limited partnership. Limited partners have limited liability and do not manage the partnership. + References No definition available. + Details
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