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Organization and Basis of Presentation (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2011 Y D bbl Segments InterestRateSwaps | Jun. 30, 2010 | Jun. 30, 2010 PNG IPO | Jun. 30, 2011 IPO Amounts Previously Reported | Jun. 30, 2011 IPO As Revised
Organization and Basis of Presentation |  |  |  |  |
Number of operating segments | 3 |  |  |  |
Partners Capital and Distribution |  |  |  |  |
Number of common units issued representing limited partner interest (in units) |  |  | 13.5 |  |
Net proceeds received by PNG from sale of common units |  |  | $ 268 |  |
Net cash used in investing activities | (1,027) | (378) |  | (110) | (378)
Net cash provided by/(used in) financing activities | $ 43 | $ 86 |  | $ (182) | $ 86

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