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Equity-Indexed Compensation Plans (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Nov. 30, 2013 plan | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Long-Term Incentive Plan Awards |  |  |  |  |
Equity-Indexed Compensation Plans |  |  |  |  |
Units outstanding (in units) | 7.3 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember |  | 8.4 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember | 6.0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember | 8.0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember
Units outstanding that include DERs (in units) | 3.5 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncludingDistributionEquivalentRightsOutstanding / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember |  |  |  |
DERs currently vested (in units) | 3.2 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncludingDistributionEquivalentRightsEarnedNumber / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember |  |  |  |
Long-Term Incentive Plan Awards | Range of annualized vesting distribution amount from $2.075 to $3.200 |  |  |  |  |
Equity-Indexed Compensation Plans |  |  |  |  |
Units outstanding (in units) | 7.3 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember / us-gaap_VestingAxis = paa_RangeOneOfAnnualizedVestingDistributionAmountMember |  |  |  |
Estimated unit vesting in 2015 (in units) | 2.1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearOne / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember / us-gaap_VestingAxis = paa_RangeOneOfAnnualizedVestingDistributionAmountMember |  |  |  |
Estimated unit vesting in 2016 (in units) | 2.1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearTwo / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember / us-gaap_VestingAxis = paa_RangeOneOfAnnualizedVestingDistributionAmountMember |  |  |  |
Estimated unit vesting in 2017 (in units) | 1.8 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearThree / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember / us-gaap_VestingAxis = paa_RangeOneOfAnnualizedVestingDistributionAmountMember |  |  |  |
Estimated unit vesting in 2018 (in units) | 1.2 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearFour / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember / us-gaap_VestingAxis = paa_RangeOneOfAnnualizedVestingDistributionAmountMember |  |  |  |
Estimated unit vesting thereafter (in units) | 0.1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingThereafter / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember / us-gaap_VestingAxis = paa_RangeOneOfAnnualizedVestingDistributionAmountMember |  |  |  |
Annualized distribution, low end of range (in dollars per unit) | 2.075 paa_ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedDistributionLowerRangeLimit / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember / us-gaap_VestingAxis = paa_RangeOneOfAnnualizedVestingDistributionAmountMember |  |  |  |
Annualized distribution, high end of range (in dollars per unit) | 3.200 paa_ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedDistributionUpperRangeLimit / us-gaap_PlanNameAxis = paa_LongTermIncentivePlansMember / us-gaap_VestingAxis = paa_RangeOneOfAnnualizedVestingDistributionAmountMember |  |  |  |
PAA 2013 LTIP |  |  |  |  |
Equity-Indexed Compensation Plans |  |  |  |  |
Number of long-term incentive plans that are consolidated into single plan |  | 3 paa_NumberOfLongTermIncentivePlansThatAreConsolidatedIntoSinglePlan / us-gaap_PlanNameAxis = paa_PlainsAllAmerican2013LongTermIncentivePlanMember |  |  |
Authorized grants (in units) | 13.1 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = paa_PlainsAllAmerican2013LongTermIncentivePlanMember |  |  |  |
PNG Successor LTIP |  |  |  |  |
Equity-Indexed Compensation Plans |  |  |  |  |
Authorized grants (in units) | 1.3 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = paa_PlainsAllAmericanPNGSuccessorLongTermIncentivePlanMember |  |  |  |
2006 Plan |  |  |  |  |
Equity-Indexed Compensation Plans |  |  |  |  |
Authorized grants (in units) | 4.2 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = paa_PlainsAllAmericanGPLLCLongTermIncentiveTrackingUnitPlanMember |  |  |  |

X
- Definition Represents the number of long-term incentive plans that are consolidated into single plan. + References No definition available. + Details
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Balance Type: | na
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- Definition The number of outstanding distribution equivalent rights that are vested as of the balance sheet date. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition This element represents the portion of outstanding units, which include distribution equivalent rights that entitles the grantee to a cash payment equal to the cash distribution paid on an outstanding common unit. + References No definition available. + Details
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- Definition The decrease in the number of shares that are potentially issuable under a share-based award plan pertaining to awards, for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements to receive or retain shares, other instruments or cash in accordance with the terms of the arrangement during the fourth twelve-month period, following the balance sheet date. + References No definition available. + Details
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- Definition The decrease in the number of shares that are potentially issuable under a share-based award plan pertaining to awards, for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements to receive or retain shares, other instruments or cash in accordance with the terms of the arrangement during the twelve-month period, following the balance sheet date. + References No definition available. + Details
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- Definition The decrease in the number of shares that are potentially issuable under a share-based award plan pertaining to awards, for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements to receive or retain shares, other instruments or cash in accordance with the terms of the arrangement during the third twelve-month period, following the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | paa_
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Period Type: | duration

X
- Definition The decrease in the number of shares that are potentially issuable under a share-based award plan pertaining to awards, for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements to receive or retain shares, other instruments or cash in accordance with the terms of the arrangement during the second twelve-month period, following the balance sheet date. + References No definition available. + Details
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X
- Definition The decrease in the number of shares that are potentially issuable under a share-based award plan pertaining to awards, for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements to receive or retain shares, other instruments or cash in accordance with the terms of the arrangement thereafter the fourth twelve-month period, following the balance sheet date. + References No definition available. + Details
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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The floor of a customized range of annualized distribution amounts required for vesting. + References No definition available. + Details
Name: | paa_ShareBasedCompensationSharesOutstandingUnderEquityCompensationPlansByAnnualizedDistributionLowerRangeLimit
Namespace Prefix: | paa_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The ceiling of a customized range of annualized distribution amounts required for vesting. + References No definition available. + Details
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Namespace Prefix: | paa_
Data Type: | num:perShareItemType
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Period Type: | duration

X
- 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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X
- 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
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Details
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- Details
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Data Type: | na
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- Details
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- Details
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