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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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The net cash inflow (outflow) from financing activity for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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