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Related Party Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Revenues - related parties: |  |  |  |  |
Total revenue - related parties | $ 7.7 | $ 7.5 | $ 20.3 | $ 63.9 |
Costs and expenses - related parties: |  |  |  |  |
Total costs and expenses - related parties | 244.7 | 225.8 | 740.9 | 644.2 |
Accounts receivable - related parties: |  |  |  |  |
Total accounts receivable - related parties | 12.8 |  | 12.8 |  | 2.5
Accounts payable - related parties: |  |  |  |  |
Total accounts payable - related parties | 96.5 |  | 96.5 |  | 127.1
Related Party Transactions [Abstract] |  |  |  |  |
Operating costs and expenses | 218.2 | 203.2 | 656.6 | 573.1 |
General and administrative expenses | 26.5 | 22.6 | 84.3 | 71.1 |
EPCO and affiliates [Member] |  |  |  |  |
Costs and expenses - related parties: |  |  |  |  |
Total costs and expenses - related parties | 218.8 | 210.8 | 654.4 | 616.9 |
Accounts payable - related parties: |  |  |  |  |
Total accounts payable - related parties | 86.2 |  | 86.2 |  | 102.4
Distributions: |  |  |  |  |
Total distributions |  |  | 601.2 | 557.7 |
Related Party Transactions [Abstract] |  |  |  |  |
Operating costs and expenses | 190.5 | 185.3 | 564.7 | 541.6 |
General and administrative expenses | 28.3 | 25.5 | 89.7 | 75.3 |
Relationship with Affiliates [Abstract] |  |  |  |  |
Number of Units Beneficially Owned (in units) | 340,462,655 |  | 340,462,655 |  |
Percentage of Total Units Outstanding (in hundredths) | 36.80% |  | 36.80% |  |
Unconsolidated affiliates [Member] |  |  |  |  |
Revenues - related parties: |  |  |  |  |
Total revenue - related parties | 7.7 | 7.5 | 20.3 | 63.9 |
Costs and expenses - related parties: |  |  |  |  |
Total costs and expenses - related parties | 25.9 | 15.0 | 86.5 | 27.3 |
Accounts receivable - related parties: |  |  |  |  |
Total accounts receivable - related parties | 12.8 |  | 12.8 |  | 2.5
Accounts payable - related parties: |  |  |  |  |
Total accounts payable - related parties | $ 10.3 |  | $ 10.3 |  | $ 24.7

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