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Equity-Indexed Compensation Plans (Details 2) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 92 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2015
Grant Date Fair Value of Outstanding AAP Management Units |  |  |
Equity-indexed compensation expense | $ 19 us-gaap_AllocatedShareBasedCompensationExpense | $ 34 us-gaap_AllocatedShareBasedCompensationExpense |
AAP Management Units |  |  |
Reserved for Future Grants |  |  |
Reserved for future grants, beginning balance (in units) | 3.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Reserved for future grants, ending balance (in units) | 3.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  | 3.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember
Outstanding |  |  |
Outstanding, beginning balance (in units) | 49.1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Outstanding, ending balance (in units) | 49.1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  | 49.1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember
Outstanding Units Earned |  |  |
Outstanding Units Earned, beginning balance (in units) | 47.8 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Earned (in units) | 0.3 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEarnedInPeriod / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Outstanding Units Earned, ending balance (in units) | 48.1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  | 48.1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember
Grant Date Fair Value of Outstanding AAP Management Units |  |  |
Grant Date Fair Value of Outstanding AAP Management Units, beginning balance | 64 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Grant Date Fair Value of Outstanding AAP Management Units, ending balance | 64 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  | 64 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember
Equity-indexed compensation expense | $ 1 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  | $ 56 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember

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- Definition The number of shares outstanding/issued under a share-based award plan which have become earned during the reporting period as certain performance conditions have been met giving the grantee the right to receive quarterly distributions. + References No definition available. + Details
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- Definition The number of outstanding awards on non-stock option plans for which the employer has issued equity instruments to an employee, including both employees who have and who have not yet satisfied service or performance criteria necessary to gain title to distributions to the shares. + References No definition available. + Details
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- Definition The number of outstanding awards on non-stock option plans for which the employer has issued equity instruments to an employee and the units issued have been earned as required performance conditions have been met, giving the employee the right to receive quarterly distributions. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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