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Investments in Unconsolidated Affiliates (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |  | 12 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 NGL Pipelines and Services [Member] | Dec. 31, 2011 NGL Pipelines and Services [Member] | Dec. 31, 2010 NGL Pipelines and Services [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Venice Energy Service Company LLC [Member] | Dec. 31, 2011 NGL Pipelines and Services [Member] Venice Energy Service Company LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] K/D/S Promix, LLC [Member] | Dec. 31, 2011 NGL Pipelines and Services [Member] K/D/S Promix, LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Baton Rouge Fractionators LLC [Member] | Dec. 31, 2011 NGL Pipelines and Services [Member] Baton Rouge Fractionators LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Skelly-Belvieu Pipeline Company, LLC [Member] | Dec. 31, 2011 NGL Pipelines and Services [Member] Skelly-Belvieu Pipeline Company, LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Texas Express Pipeline LLC [Member] | Dec. 31, 2011 NGL Pipelines and Services [Member] Texas Express Pipeline LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Texas Express Gathering LLC [Member] | Dec. 31, 2011 NGL Pipelines and Services [Member] Texas Express Gathering LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Front Range Pipeline LLC [Member] | Dec. 31, 2011 NGL Pipelines and Services [Member] Front Range Pipeline LLC [Member] | Dec. 31, 2012 Onshore Natural Gas Pipelines And Services [Member] | Dec. 31, 2011 Onshore Natural Gas Pipelines And Services [Member] | Dec. 31, 2010 Onshore Natural Gas Pipelines And Services [Member] | Dec. 31, 2012 Onshore Natural Gas Pipelines And Services [Member] Evangeline [Member] | Dec. 31, 2011 Onshore Natural Gas Pipelines And Services [Member] Evangeline [Member] | Dec. 31, 2012 Onshore Natural Gas Pipelines And Services [Member] White River Hub, LLC [Member] | Dec. 31, 2011 Onshore Natural Gas Pipelines And Services [Member] White River Hub, LLC [Member] | Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] | Dec. 31, 2011 Onshore Crude Oil Pipelines and Services [Member] | Dec. 31, 2010 Onshore Crude Oil Pipelines and Services [Member] | Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] Seaway Crude Pipeline Company [Member] | Dec. 31, 2011 Onshore Crude Oil Pipelines and Services [Member] Seaway Crude Pipeline Company [Member] | Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] Eagle Ford Pipeline LLC [Member] | Dec. 31, 2011 Onshore Crude Oil Pipelines and Services [Member] Eagle Ford Pipeline LLC [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] | Dec. 31, 2011 Offshore Pipelines And Services [Member] | Dec. 31, 2010 Offshore Pipelines And Services [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Poseidon Oil Pipeline Company, LLC [Member] | Dec. 31, 2011 Offshore Pipelines And Services [Member] Poseidon Oil Pipeline Company, LLC [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Cameron Highway Oil Pipeline Company [Member] | Dec. 31, 2011 Offshore Pipelines And Services [Member] Cameron Highway Oil Pipeline Company [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member] | Dec. 31, 2011 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Neptune Pipeline Company, LLC [Member] | Dec. 31, 2011 Offshore Pipelines And Services [Member] Neptune Pipeline Company, LLC [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Southeast Keathley Canyon Pipeline Company, LLC [Member] | Dec. 31, 2011 Offshore Pipelines And Services [Member] Southeast Keathley Canyon Pipeline Company, LLC [Member] | Dec. 31, 2012 Petrochemical and Refined Products Services [Member] | Dec. 31, 2011 Petrochemical and Refined Products Services [Member] | Dec. 31, 2010 Petrochemical and Refined Products Services [Member] | Dec. 31, 2012 Petrochemical and Refined Products Services [Member] Baton Rouge Propylene Concentrator, LLC [Member] | Dec. 31, 2011 Petrochemical and Refined Products Services [Member] Baton Rouge Propylene Concentrator, LLC [Member] | Dec. 31, 2012 Petrochemical and Refined Products Services [Member] Centennial Pipeline LLC [Member] | Dec. 31, 2011 Petrochemical and Refined Products Services [Member] Centennial Pipeline LLC [Member] | Dec. 31, 2012 Petrochemical and Refined Products Services [Member] Other Unconsolidated Affiliates [Member] | Dec. 31, 2011 Petrochemical and Refined Products Services [Member] Other Unconsolidated Affiliates [Member] | Dec. 31, 2012 Other Investment [Member] | Dec. 31, 2011 Other Investment [Member] | Dec. 31, 2010 Other Investment [Member] | Jan. 18, 2012 Other Investment [Member] Energy Transfer Equity [Member] | Apr. 27, 2012 Other Investment [Member] Energy Transfer Equity [Member] | Dec. 31, 2012 Other Investment [Member] Energy Transfer Equity [Member] | Dec. 31, 2011 Other Investment [Member] Energy Transfer Equity [Member]
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership Interest (in hundredths) |  |  |  |  |  |  | 13.10% |  | 50.00% |  | 32.20% |  | 50.00% |  | 35.00% |  | 45.00% |  | 33.30% |  |  |  |  | 0.00% | [1] |  |  | 50.00% |  |  |  |  | 50.00% |  | 50.00% |  |  |  |  | 36.00% |  | 50.00% |  | 50.00% |  | 25.70% |  | 50.00% |  |  |  |  |  |  |  | 30.00% |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% | [2] | 13.10% |
Investments in unconsolidated affiliates | $ 1,394.6 | $ 1,859.6 |  |  |  |  | $ 29.6 | $ 35.5 | $ 46.9 | $ 40.7 | $ 20.2 | $ 21.0 | $ 38.2 | $ 35.0 | $ 144.4 | $ 13.9 | $ 20.9 | $ 0 | $ 24.4 | $ 0 |  |  |  | $ 0 | [1] | $ 4.4 | [1] | $ 24.9 | $ 25.7 |  |  |  | $ 341.4 | $ 170.7 | $ 152.4 | $ 0 |  |  |  | $ 47.3 | $ 55.4 | $ 220.0 | $ 222.8 | $ 90.0 | $ 94.6 | $ 46.8 | $ 51.1 | $ 74.9 | $ 1.0 |  |  |  |  |  |  | $ 8.5 | $ 9.5 | $ 60.8 | $ 51.8 | $ 3.0 | [3] | $ 3.4 | [3] |  |  |  |  |  |  |  |  | $ 0 | [2] | $ 1,023.1 | [2]
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in income of unconsolidated affiliates | 64.3 | 46.4 | 62.0 | 15.9 | 21.8 | 17.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.4 | 5.5 | 4.6 |  |  |  |  |  |  | 32.6 | (4.1) | 6.7 |  |  |  |  | 26.9 | 27.1 | 44.8 |  |  |  |  |  |  |  |  |  |  | (17.9) | [4] | (18.7) | [4] | (9.0) | [4] |  |  |  |  |  |  |  |  | 2.4 | [5] | 14.8 | [5] | (2.8) | [5] |  |  |  |  |  |
Unamortized excess cost amounts by business segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized excess cost amounts | 63.7 | 1,180.6 |  | 28.9 | 24.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18.5 | 19.2 |  |  |  |  |  | 13.6 | 14.8 |  |  |  |  |  |  |  |  |  |  |  | 2.7 |  | 2.9 |  |  |  |  |  |  |  |  |  |  |  | 0 | [6] | 1,119.0 | [6] |  |  |  |  |  |  |  |
Equity method investment amortization of excess cost | 3.4 | 34.5 | 40.2 | 1.0 | 1.0 | 0.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.7 | 0.7 | 0.7 |  |  |  |  | 1.2 | 1.2 | 1.3 |  |  |  |  |  |  |  |  |  |  | 0.2 |  | 0.1 |  | 1.0 |  |  |  |  |  |  |  |  |  | 0.3 | [7] | 31.5 | [7] | 36.3 | [7] |  |  |  |  |  |
Forecasted amortization of excess cost amounts - 2013 | 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forecasted amortization of excess cost amounts - 2014 | 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forecasted amortization of excess cost amounts - 2015 | 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forecasted amortization of excess cost amounts - 2016 | 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forecasted amortization of excess cost amounts - 2017 | 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common units owned accounted for under equity method (in units) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,303,514 |
Number of Energy Transfer Equity common units sold (in units) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,762,636 |  |  |  | 9,672,576 |
Proceeds from the sale of Energy Transfer Equity common units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 825.1 |  |  |  | 375.2 |
Gain on the sale of Energy Transfer Equity common units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27.2 |
Investment in equity securities - available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Energy Transfer Equity common units sold (in units) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,540,878 |  |  |  |
Proceeds from the sale of available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 270.2 |  |  |  |
Gain on sales of Energy Transfer Equity common units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 68.8 |  |  |
Summarized balance sheet information of unconsolidated affiliates: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current assets | 254.7 | 1,680.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 2,911.3 | 16,413.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets | 3.2 | 4,893.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets | 3,169.2 | 22,987.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities | 276.3 | 1,955.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other liabilities | 272.1 | 11,897.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Combined equity | 2,620.8 | 9,134.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total liabilities and combined equity | 3,169.2 | 22,987.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summarized income statement information of unconsolidated affiliates [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | 670.1 | 9,119.9 | 7,437.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) | 213.7 | 1,393.4 | 1,241.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) | $ 174.9 | $ 458.1 | $ 386.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | In June 2012, we acquired the remaining ownership interests in Evangeline Gas Pipeline Company, L.P. and Evangeline Gas Corp. (collectively "Evangeline") and they became wholly owned subsidiaries of ours.
[2] | See "Other Investments" within this Note 9 for information regarding the sale of our ownership interests in Energy Transfer Equity.
[3] | Other unconsolidated affiliates include a 50% interest in a propylene pipeline extending from Mont Belvieu, Texas to La Porte, Texas and a 25% interest in a company that provides logistics communications solutions between petroleum pipelines and their customers.
[4] | Losses are primarily attributable to our investment in Centennial. As a result of a trend in declining earnings, we estimated the fair value of this equity-method investment during each of the last three fiscal years. Our estimates, based on a combination of the market and income approaches, indicate that the fair value of this investment remains substantially in excess of its carrying value.
[5] | With respect to the year ended December 31, 2012, the amount presented reflects our equity in the income of Energy Transfer Equity from January 1, 2012 to January 18, 2012.
[6] | On January 18, 2012, we discontinued using the equity method to account for our investment in Energy Transfer Equity common units and began accounting for this investment as an available-for-sale security. As a result, we no longer had any excess cost amounts associated with this investment. These excess cost amounts were attributable to various factors, including fixed assets, incentive distribution rights, amortizable intangible assets and equity method goodwill.
[7] | Reflects amortization of excess cost amounts related to our investment in Energy Transfer Equity through January 18, 2012, which is the date we ceased using the equity method to account for this investment.

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- Definition This item represents the number of units sold related to an investment in available-for-sale securities. + References No definition available. + Details
Name: | epd_AvailableForSaleSecuritiesUnitsSold
Namespace Prefix: | epd_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition This item represents the disclosure of summarized financial information for unconsolidated subsidiaries accounted for using the equity method of accounting. If investments accounted for under the equity method are, in the aggregate, material in relation to the financial position or results of operations of an investor, it may be necessary to present summarized information as to assets of the investee, or group of investments for which combined disclosure is appropriate. + References No definition available. + Details
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