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Partners' Capital and Distributions (Details 2) (USD $)
In Millions, unless otherwise specified
9 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2013
PAA Long-term Incentive Plan Awards
Sep. 30, 2013
PNG
Sep. 30, 2013
SLC Pipeline
Sep. 30, 2013
Continuous Offering Program
May 31, 2013
May 2013 Equity Distribution Agreement
Sep. 30, 2013
PNG Continuous Offering Program
PNG
Mar. 18, 2013
PNG Continuous Offering Program
PNG
Partners Capital and Distribution                
Maximum aggregate offer price of common stock           $ 750   $ 75
Units Issued         7.2   1.9  
Net proceeds from Sale 400       400   40  
Commissions paid         $ 4      
Noncontrolling interests, ownership percentage of noncontrolling owners     37.00% 25.00%        
LTIP Vesting                
Issuance of common units under LTIP (in units)   0.5