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Partners' Capital and Distributions (Details 7) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Partners Capital and Distribution    
Issuance of PNG common units (in units)   23,563,707us-gaap_PartnersCapitalAccountUnitsSaleOfUnits
Increase in capital from PNG common unit issuances $ 40us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests  
PNG Common Unit Issuance    
Partners Capital and Distribution    
Issuance of PNG common units (in units) 1,900,000us-gaap_PartnersCapitalAccountUnitsSaleOfUnits
/ us-gaap_SubsidiarySaleOfStockAxis
= paa_PNGCommonUnitIssuanceMember
 
Increase in noncontrolling interest from PNG common unit issuances 32us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
/ us-gaap_SubsidiarySaleOfStockAxis
= paa_PNGCommonUnitIssuanceMember
 
PNG Common Unit Issuance | Partners' Capital Excluding Noncontrolling Interests    
Partners Capital and Distribution    
Increase in capital from PNG common unit issuances $ 8us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
/ us-gaap_SubsidiarySaleOfStockAxis
= paa_PNGCommonUnitIssuanceMember