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Equity and Distributions, Issuances of Equity (Details) - USD ($) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 08, 2016 | Mar. 31, 2016 | Mar. 31, 2015 | Apr. 22, 2016
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |
Net cash proceeds from the issuance of common units |  | $ 1,011.5 | $ 468.4 |
At-the-Market Registration [Member] |  |  |  |
Registration Statements and Equity Offerings [Line Items] |  |  |  |
Maximum common units authorized for issuance |  |  |  | $ 2,170.0
Remaining units available for issuance | $ 415.7 |  |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |
Number of common units issued (in units) | 25,550,931 | 35,396,147 | 12,350,761 |
Gross proceeds from the sale of common units | $ 594.1 | $ 856.5 | $ 407.8 |
Net cash proceeds from the issuance of common units | $ 592.0 | $ 849.0 | $ 404.2 |
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) |  | 140,000,000 |  |
Remaining units available for issuance (in units) |  | 7,905,254 |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |
Number of common units issued (in units) |  | 7,162,744 | 1,869,079 |
Net cash proceeds from the issuance of common units |  | $ 159.8 | $ 61.7 |
Distribution Reinvestment Plan [Member] | EPCO and its privately held affiliates [Member] |  |  |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |
Number of common units issued (in units) |  | 4,481,504 |  |
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) |  | 6,653,244 |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |
Number of common units issued (in units) |  | 119,262 | 71,753 |
Net cash proceeds from the issuance of common units |  | $ 2.7 | $ 2.5 |

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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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