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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, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Revenues - related parties: |  |  |  |  |  |  |
Total revenue - related parties | $ 6.7 |  | $ 25.6 | $ 12.6 |  | $ 56.4 |
Costs and expenses - related parties: |  |  |  |  |  |  |
Total costs and expenses - related parties | 252.2 |  | 247.3 | 496.2 |  | 418.4 |
Accounts receivable - related parties: |  |  |  |  |  |  |
Total accounts receivable - related parties | 19.8 |  |  | 19.8 |  |  | 2.5
Accounts payable - related parties: |  |  |  |  |  |  |
Total accounts payable - related parties | 142.0 |  |  | 142.0 |  |  | 127.1
Related Party Transactions [Abstract] |  |  |  |  |  |  |
Operating costs and expenses | 224.2 |  | 221.5 | 438.4 |  | 369.9 |
General and administrative expenses | 28.0 |  | 25.8 | 57.8 |  | 48.5 |
Relationship with Affiliates [Abstract] |  |  |  |  |  |  |
Number of Units Beneficially Owned (in units) | 340,039,098 | [1] |  | 340,039,098 | [1] |  |
Percentage of Total Units Outstanding (in hundredths) | 37.00% |  |  | 37.00% |  |  |
EPCO and affiliates [Member] |  |  |  |  |  |  |
Costs and expenses - related parties: |  |  |  |  |  |  |
Total costs and expenses - related parties | 222.9 |  | 240.1 | 435.6 |  | 406.1 |
Accounts payable - related parties: |  |  |  |  |  |  |
Total accounts payable - related parties | 116.3 |  |  | 116.3 |  |  | 102.4
Distributions: |  |  |  |  |  |  |
Total distributions |  |  |  | 397.5 |  | 369.6 |
Related Party Transactions [Abstract] |  |  |  |  |  |  |
Operating costs and expenses | 193.1 |  | 213.6 | 374.2 |  | 356.3 |
General and administrative expenses | 29.8 |  | 26.5 | 61.4 |  | 49.8 |
Relationship with Affiliates [Abstract] |  |  |  |  |  |  |
Percentage of Total Units Outstanding (in hundredths) | 37.00% |  |  | 37.00% |  |  |
Unconsolidated affiliates [Member] |  |  |  |  |  |  |
Revenues - related parties: |  |  |  |  |  |  |
Total revenue - related parties | 6.7 |  | 25.6 | 12.6 |  | 56.4 |
Costs and expenses - related parties: |  |  |  |  |  |  |
Total costs and expenses - related parties | 29.3 |  | 7.2 | 60.6 |  | 12.3 |
Accounts receivable - related parties: |  |  |  |  |  |  |
Total accounts receivable - related parties | 19.8 |  |  | 19.8 |  |  | 2.5
Accounts payable - related parties: |  |  |  |  |  |  |
Total accounts payable - related parties | $ 25.7 |  |  | $ 25.7 |  |  | $ 24.7
[1] | Includes 4,520,431 Class B units that converted to an equal number of distribution-bearing common units on August 8, 2013 (see Note 10).

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- Definition The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 2 -Article 4 + Details
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