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Equity and Distributions, Issuances of Equity (Details) (USD $) | 1 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2014 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 Distribution Reinvestment Plan [Member] | Sep. 30, 2013 Distribution Reinvestment Plan [Member] | Nov. 07, 2014 Distribution Reinvestment Plan [Member] EPCO and affiliates [Member] | Sep. 30, 2014 Distribution Reinvestment Plan [Member] EPCO and affiliates [Member] | Sep. 30, 2014 Employee Unit Purchase Plan [Member] | Sep. 30, 2013 Employee Unit Purchase Plan [Member] | Oct. 31, 2014 Shelf Registration 2013 [Member] | Sep. 30, 2014 Shelf Registration 2013 [Member] | Sep. 30, 2014 2013 At-the-Market Registration [Member] | Sep. 30, 2013 2012 At-the-Market Registration [Member]
Registration Statements and Equity Offerings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common units issued in connection with acquisition of Oiltanking (in units) | 54,807,352 |  |  |  |  |  |  |  |  |  |  |  |
Senior notes issued under universal shelf registration |  |  |  |  |  |  |  |  |  | $ 2,750,000,000 | $ 2,000,000,000 |  |
Maximum common units authorized for issuance |  |  |  |  |  |  |  |  |  |  |  | 1,250,000,000 |
Maximum common units authorized for issuance (in units) |  |  |  | 140,000,000 |  |  |  | 8,000,000 |  |  |  |  |
Remaining units available for issuance |  |  |  |  |  |  |  |  |  |  |  | 1,190,000,000 |
Remaining units available for issuance (in units) |  |  |  | 29,812,978 |  |  |  | 7,219,762 |  |  |  |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common units issued (in units) |  |  |  | 7,148,778 | 7,298,646 |  | 2,232,872 | 207,126 | 221,662 |  |  | 1,590,334 | 14,569,614
Gross proceeds from the sale of common units |  |  |  |  |  |  |  |  |  |  |  | 58,300,000 | 439,600,000
Net cash proceeds from the issuance of common units |  | $ 304,900,000 | $ 1,134,700,000 | $ 240,000,000 | $ 206,000,000 | $ 25,000,000 | $ 75,000,000 | $ 7,400,000 | $ 6,600,000 |  |  | $ 57,700,000 | $ 435,500,000
Unit split conversion ratio |  | 2 |  |  |  |  |  |  |  |  |  |  |

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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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