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Debt (Details 3) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
PAA senior secured hedged inventory facility
Jun. 30, 2012
PAA senior secured hedged inventory facility
May 31, 2012
PAA senior secured hedged inventory facility
Dec. 31, 2011
PAA senior secured hedged inventory facility
Dec. 31, 2012
Letters of credit
Jun. 30, 2012
Letters of credit
May 31, 2012
Letters of credit
Dec. 31, 2012
PNG senior unsecured revolving credit facility maturing in August 2016
Jun. 30, 2012
PNG senior unsecured revolving credit facility maturing in August 2016
May 31, 2012
PNG senior unsecured revolving credit facility maturing in August 2016
Dec. 31, 2011
PNG senior unsecured revolving credit facility maturing in August 2016
Dec. 31, 2012
PNG senior unsecured revolving credit facility maturing in August 2016
Minimum
extension
Dec. 31, 2012
PAA senior unsecured revolving credit facility maturing in August 2016
Dec. 31, 2011
PAA senior unsecured revolving credit facility maturing in August 2016
Aug. 31, 2011
PAA senior unsecured revolving credit facility maturing in August 2016
Dec. 31, 2012
Canadian sub-facility
Aug. 31, 2011
Canadian sub-facility
Jun. 30, 2012
PNG GO Zone term loans
item
Dec. 31, 2011
Terminated PAA senior unsecured 364-day revolving credit agreement
Aug. 31, 2011
Terminated PAA senior unsecured revolving credit facility maturing in July 2012
Dec. 31, 2012
Senior secured hedged inventory debt facility scheduled to mature in August 2014
Minimum
extension
Debt                                          
Borrowing capacity $ 1,400,000,000 $ 1,400,000,000 $ 850,000,000   $ 400,000,000 $ 400,000,000 $ 250,000,000 $ 350,000,000 $ 350,000,000 $ 250,000,000     $ 1,600,000,000   $ 1,600,000,000 $ 600,000,000 $ 600,000,000   $ 1,200,000,000 $ 1,600,000,000  
Period for activation of credit facility                                     6 months    
Tenure of credit facility                                     364 days    
Maximum borrowing capacity 1,900,000,000 1,900,000,000           550,000,000 550,000,000       2,100,000,000   2,100,000,000            
Credit facility extensions available                       1                 1
Maturity date extension 1 year                                        
Extension period subject to approval 1 year             1 year                          
Borrowings outstanding 665,000,000     75,000,000       382,000,000     322,000,000   92,000,000 32,000,000              
Acquisition period 9 months                       9 months                
Threshold for acquisition period qualification 150,000,000                       150,000,000                
Coverage ratio of EBITDA-to-interest, minimum               3.00                          
Coverage ratio of debt-to-EBITDA, maximum 5.00             5.00         5.00                
Ratio of debt-to-EBITDA during acquisition period, maximum 5.50             5.50         5.50                
Basis Variable interest rate used Eurocurrency Rate or the Base Rate             Eurodollar Rate or the Base Rate         Eurocurrency Rate or the Base Rate     Canadian Prime Rate          
Term Loans, amounts outstanding                                   $ 100,000,000      
Number of term loans                                   2