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Equity-Indexed Compensation Plans (Details 3) (USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended | 89 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014
Grant Date Fair Value of Outstanding AAP Management Units |  |  |  |
Equity-indexed compensation expense | $ 98 us-gaap_AllocatedShareBasedCompensationExpense | $ 116 us-gaap_AllocatedShareBasedCompensationExpense | $ 101 us-gaap_AllocatedShareBasedCompensationExpense |
AAP Management Units |  |  |  |
Equity-Indexed Compensation Plans |  |  |  |
Authorized grants (in units) | 52.1 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |  | 52.1 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember
Maximum participation in excess of distribution (as a percent) | 8.00%paa_MaximumPercentageParticipationForDistributionInExcessOfThreshold / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |  |
Threshold for participation in distributions | 11 paa_DistributionThresholdForParticipationInDistributions / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |  |
Reserved for Future Grants |  |  |  |
Reserved for future grants, beginning balance (in units) | 3.5 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 4.7 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Granted (in units) | (0.5)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | (1.2)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Reserved for future grants, ending balance (in units) | 3.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 3.5 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 4.7 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 3.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember
Outstanding |  |  |  |
Outstanding, beginning balance (in units) | 48.6 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 47.4 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Granted (in units) | 0.5 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 1.2 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Outstanding, ending balance (in units) | 49.1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 48.6 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 47.4 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) | 47.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 34.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Earned (in units) | 0.8 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEarnedInPeriod / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 13.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEarnedInPeriod / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Outstanding Units Earned, ending balance (in units) | 47.8 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 47.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 34.0 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 47.8 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 | 51 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 44 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Granted | 13 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 7 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember |  |
Grant Date Fair Value of Outstanding AAP Management Units, ending balance | 64 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 51 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 44 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | 64 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember
Equity-indexed compensation expense | $ 7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | $ 5 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | $ 6 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember | $ 55 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember
AAP Management Units | Range of annualized vesting distribution amount for all units outstanding |  |  |  |
Equity-Indexed Compensation Plans |  |  |  |
Annualized distribution, low end of range (in dollars per unit) | $ 1.75 paa_ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedDistributionLowerRangeLimit / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember / us-gaap_VestingAxis = paa_RangeTwoOfAnnualizedVestingDistributionAmountMember |  |  |
Annualized distribution, high end of range (in dollars per unit) | $ 3.10 paa_ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedDistributionUpperRangeLimit / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember / us-gaap_VestingAxis = paa_RangeTwoOfAnnualizedVestingDistributionAmountMember |  |  |
Number of days after achievement of distribution that units will become earned, in some cases | 180 days |  |  |
AAP Management Units | Range of annualized vesting distribution amount for units that yet to become earned |  |  |  |
Equity-Indexed Compensation Plans |  |  |  |
Units outstanding (in units) | 1.3 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember / us-gaap_VestingAxis = paa_RangeThreeOfAnnualizedVestingDistributionAmountMember |  |  | 1.3 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember / us-gaap_VestingAxis = paa_RangeThreeOfAnnualizedVestingDistributionAmountMember
Annualized distribution, low end of range (in dollars per unit) | $ 2.55 paa_ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedDistributionLowerRangeLimit / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember / us-gaap_VestingAxis = paa_RangeThreeOfAnnualizedVestingDistributionAmountMember |  |  |
Annualized distribution, high end of range (in dollars per unit) | $ 3.10 paa_ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedDistributionUpperRangeLimit / us-gaap_PlanNameAxis = paa_EquityBasedCompensationPlanAAPManagementUnitsMember / us-gaap_VestingAxis = paa_RangeThreeOfAnnualizedVestingDistributionAmountMember |  |  |
Number of days after achievement of distribution that units will become earned, in some cases | 180 days |  |  |

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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 grant date fair value of outstanding units. + 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 authorized units of the general partnership that have not yet been granted/issued and are reserved for future grants. + 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 The length of time, in days, after the achievement of the specified distribution level, after which units will become earned, in some cases. + 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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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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