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Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Nov. 14, 2014
Related party transaction |  |  |  |
Costs reimbursed to general partner | $ 598 us-gaap_PaymentForAdministrativeFees | $ 567 us-gaap_PaymentForAdministrativeFees | $ 535 us-gaap_PaymentForAdministrativeFees |
Proceeds from sales of assets | 28 us-gaap_ProceedsFromSaleOfProductiveAssets | 200 us-gaap_ProceedsFromSaleOfProductiveAssets | 22 us-gaap_ProceedsFromSaleOfProductiveAssets |
BridgeTex Pipeline Company, LLC |  |  |  |
Related party transaction |  |  |  |
Interest acquired (as a percent) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = paa_BridgeTexPipelineCompanyLLCMember |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = paa_BridgeTexPipelineCompanyLLCMember
Oxy |  |  |  |
Related party transaction |  |  |  |
Related party ownership of general partner interest (as a percent) | 13.20%paa_RelatedPartyOwnershipInterestInGeneralPartnerPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember |  |  |
Revenues | 1,212 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember | 1,309 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember | 1,636 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember |
Purchases and related costs | 925 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember | 863 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember | 557 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember |
Trade accounts receivable and other receivables, gross | 489 us-gaap_DueFromRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember | 133 us-gaap_DueFromRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember |  |
Accounts payable, gross | 441 us-gaap_DueToRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember | 181 us-gaap_DueToRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember |  |
Oxy | BridgeTex Pipeline Company, LLC |  |  |  |
Related party transaction |  |  |  |
Interest acquired (as a percent) |  |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_OxyMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = paa_BridgeTexPipelineCompanyLLCMember
Equity Method Investees |  |  |  |
Related party transaction |  |  |  |
Revenues | 3 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember | 33 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember | 18 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember |
Purchases and related costs | 75 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember | 79 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember | 42 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember |
Trade accounts receivable and other receivables, gross |  | 2 us-gaap_DueFromRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember |  |
Accounts payable, gross | 6 us-gaap_DueToRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember | 6 us-gaap_DueToRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember |  |
Equity Method Investees | Maximum |  |  |  |
Related party transaction |  |  |  |
Trade accounts receivable and other receivables, gross | 1 us-gaap_DueFromRelatedPartiesCurrent / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember |  |  |
Eagle Ford Pipeline LLC |  |  |  |
Related party transaction |  |  |  |
Proceeds from sales of assets | $ 25 us-gaap_ProceedsFromSaleOfProductiveAssets / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_EagleFordPipelineLLCMember |  |  |

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