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Business Segments (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 Segment | Dec. 31, 2012 | Dec. 31, 2011
Business Segments [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments |  |  |  |  |  |  |  |  | 5 |  |
Segment Gross Operating Margin [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 47,727.0 | $ 42,583.1 | $ 44,313.0
Subtract operating costs and expenses |  |  |  |  |  |  |  |  | (44,238.7) | (39,367.9) | (41,318.5)
Add equity in income of unconsolidated affiliates |  |  |  |  |  |  |  |  | 167.3 | 64.3 | 46.4
Add depreciation, amortization and accretion expense amounts excluded from gross operating margin |  |  |  |  |  |  |  |  | 1,148.9 | 1,061.7 | 958.7
Add impairment charges excluded from gross operating margin |  |  |  |  |  |  |  |  | 92.6 | 63.4 | 27.8
Add operating lease expenses paid by EPCO excluded from gross operating margin |  |  |  |  |  |  |  |  | 0 | 0 | 0.3
Subtract gains attributable to asset sales and insurance recoveries excluded from gross operating margin |  |  |  |  |  |  |  |  | (83.4) | (17.6) | (156.0)
Add non-refundable deferred revenues attributable to shipper make-up rights on new pipeline projects included in gross operating margin |  |  |  |  |  |  |  |  | 4.4 | 0 | 0
Total segment gross operating margin |  |  |  |  |  |  |  |  | 4,818.1 | 4,387.0 | 3,871.7
Reconciliation of total Segment Gross Operating Margin [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total segment gross operating margin |  |  |  |  |  |  |  |  | 4,818.1 | 4,387.0 | 3,871.7
Adjustments to reconcile total segment gross operating margin to operating income: |  |  |  |  |  |  |  |  |  |  |
Subtract depreciation, amortization and accretion expense amounts not reflected in gross operating margin |  |  |  |  |  |  |  |  | (1,148.9) | (1,061.7) | (958.7)
Subtract impairment charges not reflected in gross operating margin |  |  |  |  |  |  |  |  | (92.6) | (63.4) | (27.8)
Subtract operating lease expenses paid by EPCO not reflected in gross operating margin |  |  |  |  |  |  |  |  | 0 | 0 | (0.3)
Add gains attributable to asset sales and insurance recoveries not reflected in gross operating margin |  |  |  |  |  |  |  |  | 83.4 | 17.6 | 156.0
Subtract non-refundable deferred revenues included in gross operating margin attributable to shipper make-up rights on new pipeline projects |  |  |  |  |  |  |  |  | (4.4) | 0 | 0
Subtract general and administrative costs not reflected in gross operating margin |  |  |  |  |  |  |  |  | (188.3) | (170.3) | (181.8)
Operating income | 915.5 | 819.9 | 774.2 | 957.7 | 822.7 | 788.5 | 749.1 | 748.9 | 3,467.3 | 3,109.2 | 2,859.1
Other expense, net |  |  |  |  |  |  |  |  | (802.7) | (698.4) | (743.6)
Income before income taxes |  |  |  |  |  |  |  |  | $ 2,664.6 | $ 2,410.8 | $ 2,115.5
Shell Oil Company [Member] | Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Largest non-affiliated customer percentage (in hundredths) |  |  |  |  |  |  |  |  |  |  | 10.60%
BP [Member] | Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Largest non-affiliated customer percentage (in hundredths) |  |  |  |  |  |  |  |  | 9.00% | 9.50% |

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- Definition The amount of expense recognized and charged to operating costs and expenses in the current period that reflects the allocation of the cost of assets over the assets' useful lives excluded from gross operating margin. + References No definition available. + Details
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- Definition Operating income before: (i) depreciation, amortization and accretion expense; (ii) non-cash consolidated asset impairment charges; (iii) operating lease expenses for which we do not have the payment obligation; (iv) gains and losses from asset sales and related transactions and (v) general and administrative costs. + References No definition available. + Details
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