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Related Party Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Revenues - related parties: |  |  |  |  |
Total revenue - related parties | $ 17.3 | $ 6.7 | $ 52.8 | $ 12.6 |
Costs and expenses - related parties: |  |  |  |  |
Total costs and expenses - related parties | 285.5 | 252.2 | 577.8 | 496.2 |
Accounts receivable - related parties: |  |  |  |  |
Total accounts receivable - related parties | 56.3 |  | 56.3 |  | 6.8
Accounts payable - related parties: |  |  |  |  |
Total accounts payable - related parties | 114.0 |  | 114.0 |  | 150.5
Related Party Transactions [Abstract] |  |  |  |  |
Operating costs and expenses | 256.7 | 224.2 | 518.8 | 438.4 |
General and administrative expenses | 28.8 | 28.0 | 59.0 | 57.8 |
EPCO and affiliates [Member] |  |  |  |  |
Costs and expenses - related parties: |  |  |  |  |
Total costs and expenses - related parties | 239.5 | 222.9 | 475.2 | 435.6 |
Accounts payable - related parties: |  |  |  |  |
Total accounts payable - related parties | 101.9 |  | 101.9 |  | 116.3
Distributions: |  |  |  |  |
Total cash distributions |  |  | 431.8 | 397.5 |
Related Party Transactions [Abstract] |  |  |  |  |
Operating costs and expenses | 208.9 | 193.1 | 412.6 | 374.2 |
General and administrative expenses | 30.6 | 29.8 | 62.6 | 61.4 |
Relationship with Affiliates [Abstract] |  |  |  |  |
Number of Units (in units) | 341,641,866 |  | 341,641,866 |  |
Percentage of Total Units Outstanding (in hundredths) | 36.40% |  | 36.40% |  |
Unconsolidated affiliates [Member] |  |  |  |  |
Revenues - related parties: |  |  |  |  |
Total revenue - related parties | 17.3 | 6.7 | 52.8 | 12.6 |
Costs and expenses - related parties: |  |  |  |  |
Total costs and expenses - related parties | 46.0 | 29.3 | 102.6 | 60.6 |
Accounts receivable - related parties: |  |  |  |  |
Total accounts receivable - related parties | 56.3 |  | 56.3 |  | 6.8
Accounts payable - related parties: |  |  |  |  |
Total accounts payable - related parties | $ 12.1 |  | $ 12.1 |  | $ 34.2

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