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Partnership Operations, Organization and Basis of Presentation (Details) | 12 Months Ended
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Dec. 31, 2013 Segment Fractionator Platform bbl mi Plant ft3 | Dec. 31, 2011 Duncan Merger [Member] Common units [Member]
Partnership Operations, Organization and Basis of Presentation [Abstract] |  |
Number of miles of onshore and offshore pipelines | 51,000 |
Number of barrels of storage capacity | 200,000,000 |
Number of cubic feet of storage capacity | 14,000,000,000 |
Number of natural gas processing plants | 24 |
Number of fractionators | 22 |
Number of offshore hub platforms | 6 |
Number of reportable segments | 5 |
Limited partners ownership interest (in hundredths) | 100.00% |
Mergers [Line Items] |  |
Common unit exchange ratio in connection with merger |  | 1.01
Common units issued in connection with merger (in units) |  | 24,277,310

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