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Equity and Distributions, Issuances of Equity (Details) - USD ($) $ in Millions | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jul. 14, 2016 | Jul. 13, 2016 | Mar. 31, 2016
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |  |
Net cash proceeds from the issuance of common units | $ 1,888.3 | $ 944.1 |  |  |
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 |  |  | $ 1,890.0 | $ 140.0 |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |  |
Number of common units issued (in units) | 68,645,180 | 23,258,453 |  |  |
Gross proceeds from the sale of common units | $ 1,660.0 | $ 767.1 |  |  |
Net cash proceeds from the issuance of common units | $ 1,650.0 | $ 760.0 |  |  |
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 | 3,225,057 |  |  |
Gross proceeds from the sale of common units | $ 100.0 | $ 100.0 |  |  |
Distribution Reinvestment Plan [Member] |  |  |  |  |
Registration Statements and Equity Offerings [Line Items] |  |  |  |  |
Maximum common units authorized for issuance (in units) | 240,000,000 |  |  |  | 140,000,000
Remaining units available for issuance (in units) | 104,963,257 |  |  |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |  |
Number of common units issued (in units) | 10,104,741 | 5,453,541 |  |  |
Net cash proceeds from the issuance of common units | $ 232.3 | $ 177.8 |  |  |
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) | 6,492,546 |  |  |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |  |
Number of common units issued (in units) | 279,960 | 183,734 |  |  |
Net cash proceeds from the issuance of common units | $ 6.8 | $ 6.3 |  |  |

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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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