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Investments in Unconsolidated Affiliates (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended |
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Sep. 30, 2013 NGL Pipelines and Services [Member] | Sep. 30, 2012 NGL Pipelines and Services [Member] | Sep. 30, 2013 NGL Pipelines and Services [Member] | Sep. 30, 2012 NGL Pipelines and Services [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] | Sep. 30, 2013 NGL Pipelines and Services [Member] Venice Energy Service Company LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Venice Energy Service Company LLC [Member] | Sep. 30, 2013 NGL Pipelines and Services [Member] K/D/S Promix, LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] K/D/S Promix, LLC [Member] | Sep. 30, 2013 NGL Pipelines and Services [Member] Baton Rouge Fractionators LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Baton Rouge Fractionators LLC [Member] | Sep. 30, 2013 NGL Pipelines and Services [Member] Skelly-Belvieu Pipeline Company, LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Skelly-Belvieu Pipeline Company, LLC [Member] | Sep. 30, 2013 NGL Pipelines and Services [Member] Texas Express Pipeline LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Texas Express Pipeline LLC [Member] | Sep. 30, 2013 NGL Pipelines and Services [Member] Texas Express Gathering LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Texas Express Gathering LLC [Member] | Sep. 30, 2013 NGL Pipelines and Services [Member] Front Range Pipeline LLC [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] Front Range Pipeline LLC [Member] | Sep. 30, 2013 Onshore Natural Gas Pipelines And Services [Member] | Sep. 30, 2012 Onshore Natural Gas Pipelines And Services [Member] | Sep. 30, 2013 Onshore Natural Gas Pipelines And Services [Member] | Sep. 30, 2012 Onshore Natural Gas Pipelines And Services [Member] | Sep. 30, 2013 Onshore Natural Gas Pipelines And Services [Member] White River Hub, LLC [Member] | Dec. 31, 2012 Onshore Natural Gas Pipelines And Services [Member] White River Hub, LLC [Member] | Sep. 30, 2013 Onshore Crude Oil Pipelines and Services [Member] | Sep. 30, 2012 Onshore Crude Oil Pipelines and Services [Member] | Sep. 30, 2013 Onshore Crude Oil Pipelines and Services [Member] | Sep. 30, 2012 Onshore Crude Oil Pipelines and Services [Member] | Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] | Sep. 30, 2013 Onshore Crude Oil Pipelines and Services [Member] Seaway Crude Pipeline Company LLC [Member] | Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] Seaway Crude Pipeline Company LLC [Member] | Sep. 30, 2013 Onshore Crude Oil Pipelines and Services [Member] Eagle Ford Pipeline LLC [Member] | Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] Eagle Ford Pipeline LLC [Member] | Sep. 30, 2013 Offshore Pipelines And Services [Member] | Sep. 30, 2012 Offshore Pipelines And Services [Member] | Sep. 30, 2013 Offshore Pipelines And Services [Member] | Sep. 30, 2012 Offshore Pipelines And Services [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] | Sep. 30, 2013 Offshore Pipelines And Services [Member] Poseidon Oil Pipeline Company, LLC [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Poseidon Oil Pipeline Company, LLC [Member] | Sep. 30, 2013 Offshore Pipelines And Services [Member] Cameron Highway Oil Pipeline Company [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Cameron Highway Oil Pipeline Company [Member] | Sep. 30, 2013 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member] | Sep. 30, 2013 Offshore Pipelines And Services [Member] Neptune Pipeline Company, LLC [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Neptune Pipeline Company, LLC [Member] | Sep. 30, 2013 Offshore Pipelines And Services [Member] Southeast Keathley Canyon Pipeline Company, LLC [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Southeast Keathley Canyon Pipeline Company, LLC [Member] | Sep. 30, 2013 Petrochemical and Refined Products Services [Member] | Sep. 30, 2012 Petrochemical and Refined Products Services [Member] | Sep. 30, 2013 Petrochemical and Refined Products Services [Member] | Sep. 30, 2012 Petrochemical and Refined Products Services [Member] | Dec. 31, 2012 Petrochemical and Refined Products Services [Member] | Sep. 30, 2013 Petrochemical and Refined Products Services [Member] Baton Rouge Propylene Concentrator, LLC [Member] | Dec. 31, 2012 Petrochemical and Refined Products Services [Member] Baton Rouge Propylene Concentrator, LLC [Member] | Sep. 30, 2013 Petrochemical and Refined Products Services [Member] Centennial Pipeline LLC [Member] | Dec. 31, 2012 Petrochemical and Refined Products Services [Member] Centennial Pipeline LLC [Member] | Sep. 30, 2013 Petrochemical and Refined Products Services [Member] Other Unconsolidated Affiliates [Member] | Dec. 31, 2012 Petrochemical and Refined Products Services [Member] Other Unconsolidated Affiliates [Member] | Sep. 30, 2013 Other Investment [Member] | Sep. 30, 2012 Other Investment [Member] | Sep. 30, 2013 Other Investment [Member] | Sep. 30, 2012 Other Investment [Member] | Jan. 18, 2012 Other Investment [Member] Energy Transfer Equity [Member] | Apr. 27, 2012 Other Investment [Member] Energy Transfer Equity [Member] | Sep. 30, 2012 Other Investment [Member] Energy Transfer Equity [Member] | Dec. 31, 2012 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% | [1] |  |  | 45.00% | [1] |  |  | 33.30% |  |  |  |  |  | 50.00% |  |  |  |  |  |  | 50.00% |  | 50.00% | [2] |  |  |  |  |  |  |  | 36.00% |  | 50.00% |  | 50.00% |  | 25.70% |  | 50.00% |  |  |  |  |  |  | 30.00% |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  | 13.10%
Investments in unconsolidated affiliates | $ 2,134.5 |  | $ 2,134.5 |  | $ 1,394.6 |  |  |  |  |  | $ 28.1 | $ 29.6 | $ 44.4 | $ 46.9 | $ 19.3 | $ 20.2 | $ 40.5 | $ 38.2 | $ 328.5 | [1] | $ 144.4 | [1] | $ 34.6 | [1] | $ 20.9 | [1] | $ 111.8 | $ 24.4 |  |  |  |  | $ 24.3 | $ 24.9 |  |  |  |  |  | $ 677.2 | $ 341.4 | $ 212.4 | [2] | $ 152.4 | [2] |  |  |  |  |  | $ 43.4 | $ 47.3 | $ 209.9 | $ 220.0 | $ 86.2 | $ 90.0 | $ 43.7 | $ 46.8 | $ 157.2 | $ 74.9 |  |  |  |  |  | $ 7.8 | $ 8.5 | $ 62.3 | $ 60.8 | $ 2.9 | [3] | $ 3.0 | [3] |  |  |  |  |  |  |  |
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of unconsolidated affiliates | 44.0 | 21.0 | 126.1 | 42.2 |  | 4.1 | 3.0 | 11.8 | 12.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.0 | 0.9 | 2.9 | 3.5 |  |  | 34.3 | 16.5 | 101.0 | 20.6 |  |  |  |  |  |  |  | 9.8 | 6.8 | 24.9 | 17.8 |  |  |  |  |  |  |  |  |  |  |  | (5.2) | (6.2) | (14.5) | (14.1) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 2.4 |  |  |  |
Unamortized excess cost amounts by business segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized excess cost amounts | 61.2 |  | 61.2 |  | 63.7 | 28.0 |  | 28.0 |  | 28.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18.0 |  | 18.0 |  | 18.5 |  |  |  |  |  |  | 12.6 |  | 12.6 |  | 13.6 |  |  |  |  |  |  |  |  |  |  | 2.6 |  | 2.6 |  | 2.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment amortization of excess cost | 0.8 | 0.7 | 2.5 | 2.5 |  | 0.3 | 0.2 | 0.9 | 0.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.1 | 0.2 | 0.5 | 0.5 |  |  |  |  |  |  |  | 0.3 | 0.3 | 1.0 | 0.9 |  |  |  |  |  |  |  |  |  |  |  | 0.1 | 0 | 0.1 | 0.1 |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 0.3 |  |  |  |
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 |  |  |
Proceeds from the sale of Energy Transfer Equity common units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 825.1 |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 27.5 | $ 41.3 | $ 68.8 |
[1] | Planned principal operations commenced in November 2013.
[2] | Planned principal operations commenced in July 2013.
[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.

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