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Equity-Indexed Compensation Plans (Details 4) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Other Consolidated Equity-Indexed Compensation Plan Information |  |  |
Equity-indexed compensation expense | $ 98 us-gaap_AllocatedShareBasedCompensationExpense | $ 116 us-gaap_AllocatedShareBasedCompensationExpense | $ 101 us-gaap_AllocatedShareBasedCompensationExpense
LTIP unit-settled vestings | 53 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalSettlementFairValue | 48 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalSettlementFairValue | 62 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalSettlementFairValue
LTIP cash-settled vestings | 53 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedInPeriodCashSettled | 61 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedInPeriodCashSettled | 66 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedInPeriodCashSettled
DER cash payments | 8 paa_DistributionEquivalentRightsCashPayments | 8 paa_DistributionEquivalentRightsCashPayments | 7 paa_DistributionEquivalentRightsCashPayments
Equity-Indexed Compensation Plan Fair Value Amortization |  |  |
2015 | 70 paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearOne |  |
2016 | 46 paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearTwo |  |
2017 | 21 paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearThree |  |
2018 | 6 paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearFour |  |
2019 | 1 paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearFive |  |
Total | 144 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |  |
PNG |  |  |
Other Consolidated Equity-Indexed Compensation Plan Information |  |  |
LTIP unit-settled vestings |  |  | 1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalSettlementFairValue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_PNGMember
PNG | Maximum |  |  |
Other Consolidated Equity-Indexed Compensation Plan Information |  |  |
LTIP unit-settled vestings |  | $ 1 paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalSettlementFairValue / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = paa_PNGMember |

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- Definition Aggregate cash payments made towards distribution equivalent rights during the reporting period that have been earned by satisfying service and performance requirements. + References No definition available. + Details
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- Details
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- Definition The amount of amortization expense expected to be recognized during the fifth twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the fourth twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the third twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the second twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The total settlement date fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units in accordance with the terms of the arrangement, and for which no expense was recognized in equity during prior periods. + References No definition available. + Details
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- Definition Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements that vested during the reporting period by satisfying service and performance requirements. + 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 Unrecognized cost of unvested share-based compensation awards. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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