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Equity and Distributions, Issuances of Equity (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($) shares | Dec. 31, 2015 USD ($) shares | Dec. 31, 2014 USD ($) shares
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Net cash proceeds from the issuance of common units | $ | $ 2,542.8 | $ 1,188.6 | $ 388.8
Split of limited partner units ratio |  |  | 2
Restricted Common Unit Awards [Member] |  |  |
Treasury Units: |  |  |
Acquisition of treasury units in connection with vesting of equity-based awards (in units) | 409,764 |  |
Phantom Unit Awards [Member] |  |  |
Treasury Units: |  |  |
Acquisition of treasury units in connection with vesting of equity-based awards (in units) | 590,855 |  |
Treasury Units [Member] |  |  |
Treasury Units: |  |  |
Maximum common units authorized for repurchase under a buy-back program (in units) | 4,000,000 |  |
Total of common units repurchased under a buy-back program (in units) | 2,763,200 |  |
Remaining common units available for repurchase (in units) | 1,236,800 |  |
Total cost of treasury units | $ | $ 23.2 |  |
Shelf Registration 2013 [Member] |  |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Senior notes issued under universal shelf registration | $ | 1,250.0 | $ 2,500.0 | $ 4,750.0
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 | $ | $ 1,440.0 |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Number of common units issued (in units) | 87,867,037 | 25,520,424 | 1,590,334
Gross proceeds from the sale of common units | $ | $ 2,170.0 | $ 825.4 | $ 58.3
Net cash proceeds from the issuance of common units | $ | $ 2,160.0 | $ 817.4 | $ 57.7
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) | 99,258,495 |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Number of common units issued (in units) | 15,809,503 | 12,413,351 | 9,480,407
Net cash proceeds from the issuance of common units | $ | $ 374.0 | $ 359.8 | $ 321.3
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 |  |
Gross proceeds from the sale of common units | $ | $ 100.0 | $ 100.0 | $ 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) | 6,265,475 |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Number of common units issued (in units) | 507,031 | 380,562 | 273,820
Net cash proceeds from the issuance of common units | $ | $ 12.7 | $ 11.4 | $ 9.8

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