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Equity-Indexed Compensation Plans (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2013
PAA Long-term Incentive Plan Awards
Dec. 31, 2012
PAA Long-term Incentive Plan Awards
Dec. 31, 2011
PAA Long-term Incentive Plan Awards
Dec. 31, 2010
PAA Long-term Incentive Plan Awards
Dec. 31, 2013
PAA Long-term Incentive Plan Awards
Range of annualized vesting distribution amount from $1.925 to $2.65
Nov. 30, 2013
PAA 2013 LTIP
plan
Dec. 31, 2013
PNG Successor LTIP
Dec. 31, 2013
Non Officer Employee Long Term Incentive Tracking Unit Plan
Equity-Indexed Compensation Plans                
Number of long-term incentive plans that are consolidated into single plan           3    
Authorized grants (in units)           13.1 1.3 4.2
Units outstanding (in units) 8.4 6.0 8.0 8.8 8.4      
Estimated unit vesting in 2014 (in units)         1.9      
Estimated unit vesting in 2015 (in units)         2.1      
Estimated unit vesting in 2016 (in units)         2.0      
Estimated unit vesting in 2017 (in units)         1.3      
Estimated unit vesting thereafter (in units)         1.1      
Annualized distribution, low end of range (in dollars per unit)         $ 1.925      
Annualized distribution, high end of range (in dollars per unit)         $ 2.65      
Units outstanding that include DERs (in units) 4.5              
DERs currently vested (in units) 3.0