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Partners' Capital and Distributions (Details 2) (USD $)
In Millions, unless otherwise specified
6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2013
PAA Long-term Incentive Plan Awards
Jun. 30, 2013
PNG
Jun. 30, 2013
SLC Pipeline
Jun. 30, 2013
September 2012 Continuous Offering Program
Sep. 13, 2012
September 2012 Continuous Offering Program
Jun. 30, 2013
May 2013 Continuous Offering Program
May 28, 2013
May 2013 Continuous Offering Program
Jun. 30, 2013
May 2013 Continuous Offering Program
Maximum
Jun. 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           $ 500   $ 750     $ 75
Units Issued         5.1   0.8     1.4  
Net proceeds from Sale 331       283   48     30  
Commissions paid         $ 3       $ 1    
Noncontrolling interests, ownership percentage of noncontrolling owners     37.00% 25.00%              
LTIP Vesting                      
Issuance of common units under LTIP (in units)   0.5