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Investments in Unconsolidated Affiliates (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended |
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Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012 | Jun. 30, 2013 NGL Pipelines and Services [Member] | Jun. 30, 2012 NGL Pipelines and Services [Member] | Jun. 30, 2013 NGL Pipelines and Services [Member] | Jun. 30, 2012 NGL Pipelines and Services [Member] | Dec. 31, 2012 NGL Pipelines and Services [Member] | Jun. 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] | Jun. 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] | Jun. 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] | Jun. 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] | Jun. 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] | Jun. 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] | Jun. 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] | Jun. 30, 2013 Onshore Natural Gas Pipelines And Services [Member] | Jun. 30, 2012 Onshore Natural Gas Pipelines And Services [Member] | Jun. 30, 2013 Onshore Natural Gas Pipelines And Services [Member] | Jun. 30, 2012 Onshore Natural Gas Pipelines And Services [Member] | Jun. 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] | Jun. 30, 2013 Onshore Crude Oil Pipelines and Services [Member] | Jun. 30, 2012 Onshore Crude Oil Pipelines and Services [Member] | Jun. 30, 2013 Onshore Crude Oil Pipelines and Services [Member] | Jun. 30, 2012 Onshore Crude Oil Pipelines and Services [Member] | Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] | Jun. 30, 2013 Onshore Crude Oil Pipelines and Services [Member] Seaway Crude Pipeline Company [Member] | Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] Seaway Crude Pipeline Company [Member] | Jun. 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] | Jun. 30, 2013 Offshore Pipelines And Services [Member] | Jun. 30, 2012 Offshore Pipelines And Services [Member] | Jun. 30, 2013 Offshore Pipelines And Services [Member] | Jun. 30, 2012 Offshore Pipelines And Services [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] | Jun. 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] | Jun. 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] | Jun. 30, 2013 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member] | Dec. 31, 2012 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member] | Jun. 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] | Jun. 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] | Jun. 30, 2013 Petrochemical and Refined Products Services [Member] | Jun. 30, 2012 Petrochemical and Refined Products Services [Member] | Jun. 30, 2013 Petrochemical and Refined Products Services [Member] | Jun. 30, 2012 Petrochemical and Refined Products Services [Member] | Dec. 31, 2012 Petrochemical and Refined Products Services [Member] | Jun. 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] | Jun. 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] | Jun. 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] | Jun. 30, 2013 Other Investment [Member] | Jun. 30, 2012 Other Investment [Member] | Jun. 30, 2013 Other Investment [Member] | Jun. 30, 2012 Other Investment [Member] | Jan. 18, 2012 Other Investment [Member] Energy Transfer Equity [Member] | Apr. 27, 2013 Other Investment [Member] Energy Transfer Equity [Member] | Jun. 30, 2012 Other Investment [Member] Energy Transfer Equity [Member] | Jun. 30, 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% |  |  |  |  |  | 50.00% |  |  |  |  |  |  | 50.00% |  | 50.00% |  |  |  |  |  |  | 36.00% |  | 50.00% |  | 50.00% |  | 25.70% |  | 50.00% |  |  |  |  |  |  | 30.00% |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  | 13.10%
Investments in unconsolidated affiliates | $ 1,938.8 |  | $ 1,938.8 |  | $ 1,394.6 |  |  |  |  |  | $ 30.6 | $ 29.6 | $ 45.2 | $ 46.9 | $ 19.4 | $ 20.2 | $ 40.3 | $ 38.2 | $ 282.7 | $ 144.4 | $ 29.2 | $ 20.9 | $ 68.1 | $ 24.4 |  |  |  |  | $ 24.4 | $ 24.9 |  |  |  |  |  | $ 558.1 | $ 341.4 | $ 225.0 | $ 152.4 |  |  |  |  |  | $ 45.4 | $ 47.3 | $ 211.1 | $ 220.0 | $ 87.2 | $ 90.0 | $ 44.6 | $ 46.8 | $ 155.0 | $ 74.9 |  |  |  |  |  | $ 8.0 | $ 8.5 | $ 61.5 | $ 60.8 | $ 3.0 | [1] | $ 3.0 | [1] |  |  |  |  |  |  |  |  |
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in income of unconsolidated affiliates | 37.6 | 11.3 | 82.1 | 21.2 |  | 3.8 | 3.8 | 7.7 | 9.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.9 | 1.2 | 1.9 | 2.6 |  |  | 30.1 | 3.6 | 66.7 | 4.1 |  |  |  |  |  | 8.7 | 4.1 | 15.1 | 11.0 |  |  |  |  |  |  |  |  |  |  |  | (5.9) | (1.4) | (9.3) | (7.9) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 2.4 |  |  |  |  |
Unamortized excess cost amounts by business segment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized excess cost amounts | 62.0 |  | 62.0 |  | 63.7 | 28.3 |  | 28.3 |  | 28.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18.1 |  | 18.1 |  | 18.5 |  |  |  |  | 12.9 |  | 12.9 |  | 13.6 |  |  |  |  |  |  |  |  |  |  | 2.7 |  | 2.7 |  | 2.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment amortization of excess cost | 0.9 | 0.7 | 1.7 | 1.8 |  | 0.3 | 0.3 | 0.6 | 0.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.2 | 0.1 | 0.4 | 0.3 |  |  |  |  |  | 0.4 | 0.3 | 0.7 | 0.6 |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 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 | 15.5 | 68.8 |
Summarized income statement information of unconsolidated affiliates [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  | 71.5 | 71.5 | 154.9 | 182.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.9 | 2.9 | 5.8 | 5.7 |  |  | 88.4 | 21.5 | 166.9 | 33.8 |  |  |  |  |  | 46.9 | 39.1 | 89.2 | 80.2 |  |  |  |  |  |  |  |  |  |  |  | 5.7 | 5.9 | 11.7 | 11.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  | 12.7 | 15.3 | 28.0 | 42.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.8 | 1.9 | 3.7 | 3.7 |  |  | 63.4 | 7.4 | 135.1 | 8.2 |  |  |  |  |  | 24.2 | 12.8 | 42.2 | 31.9 |  |  |  |  |  |  |  |  |  |  |  | (9.2) | (0.3) | (13.1) | (9.7) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) |  |  |  |  |  | $ 12.6 | $ 15.2 | $ 27.8 | $ 42.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.8 | $ 1.9 | $ 3.7 | $ 3.7 |  |  | $ 59.1 | $ 7.3 | $ 127.0 | $ 8.1 |  |  |  |  |  | $ 23.9 | $ 12.5 | $ 41.2 | $ 30.9 |  |  |  |  |  |  |  |  |  |  |  | $ (11.0) | $ (2.4) | $ (16.8) | $ (13.8) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | 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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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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- Definition Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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