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Related Party Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Revenues - related parties: |  |  |  |
Total revenue - related parties | $ 5.9 |  | $ 30.8 |
Costs and expenses - related parties: |  |  |  |
Total costs and expenses - related parties | 244.0 |  | 171.1 |
Accounts receivable - related parties: |  |  |  |
Total accounts receivable - related parties | 2.7 |  |  | 2.5
Accounts payable - related parties: |  |  |  |
Total accounts payable - related parties | 93.1 |  |  | 127.1
Related Party Transactions [Abstract] |  |  |  |
Operating costs and expenses | 214.2 |  | 148.4 |
General and administrative expenses | 29.8 |  | 22.7 |
EPCO and affiliates [Member] |  |  |  |
Costs and expenses - related parties: |  |  |  |
Total costs and expenses - related parties | 212.7 |  | 166.0 |
Accounts payable - related parties: |  |  |  |
Total accounts payable - related parties | 61.9 |  |  | 102.4
Distributions: |  |  |  |
Total distributions | 197.1 |  | 183.7 |
Related Party Transactions [Abstract] |  |  |  |
Operating costs and expenses | 181.1 |  | 142.7 |
General and administrative expenses | 31.6 |  | 23.3 |
Relationship with Affiliates [Abstract] |  |  |  |
Number of Units Beneficially Owned (in units) | 339,604,069 | [1] |  |
Percentage of Total Units Outstanding (in hundredths) | 37.10% |  |  |
Unconsolidated affiliates [Member] |  |  |  |
Revenues - related parties: |  |  |  |
Total revenue - related parties | 5.9 |  | 30.8 |
Costs and expenses - related parties: |  |  |  |
Total costs and expenses - related parties | 31.3 |  | 5.1 |
Accounts receivable - related parties: |  |  |  |
Total accounts receivable - related parties | 2.7 |  |  | 2.5
Accounts payable - related parties: |  |  |  |
Total accounts payable - related parties | $ 31.2 |  |  | $ 24.7
[1] | Includes 4,520,431 Class B units.

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