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Goodwill (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Changes in goodwill
Balance at beginning of period	$ 2,503us-gaap_Goodwill	$ 2,535us-gaap_Goodwill
Acquisitions	1us-gaap_GoodwillAcquiredDuringPeriod	6us-gaap_GoodwillAcquiredDuringPeriod
Foreign currency translation adjustments	(39)us-gaap_GoodwillTranslationAdjustments	(33)us-gaap_GoodwillTranslationAdjustments
Purchase price accounting adjustments and other		(5)paa_GoodwillPurchasePriceAccountingAndOtherAdjustments
Balance at end of period	2,465us-gaap_Goodwill	2,503us-gaap_Goodwill
Transportation
Changes in goodwill
Balance at beginning of period	878us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentPipelineTariffActivitiesTruckingMember	897us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentPipelineTariffActivitiesTruckingMember
Acquisitions		6us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentPipelineTariffActivitiesTruckingMember
Foreign currency translation adjustments	(24)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentPipelineTariffActivitiesTruckingMember	(20)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentPipelineTariffActivitiesTruckingMember
Purchase price accounting adjustments and other		(5)paa_GoodwillPurchasePriceAccountingAndOtherAdjustments / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentPipelineTariffActivitiesTruckingMember
Balance at end of period	854us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentPipelineTariffActivitiesTruckingMember	878us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentPipelineTariffActivitiesTruckingMember
Facilities
Changes in goodwill
Balance at beginning of period	1,162us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentStorageTerminallingProcessingMember	1,171us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentStorageTerminallingProcessingMember
Acquisitions	1us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentStorageTerminallingProcessingMember
Foreign currency translation adjustments	(11)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentStorageTerminallingProcessingMember	(9)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentStorageTerminallingProcessingMember
Balance at end of period	1,152us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentStorageTerminallingProcessingMember	1,162us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentStorageTerminallingProcessingMember
Supply and Logistics
Changes in goodwill
Balance at beginning of period	463us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSalesAndLogisticsMember	467us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSalesAndLogisticsMember
Foreign currency translation adjustments	(4)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSalesAndLogisticsMember	(4)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSalesAndLogisticsMember
Balance at end of period	$ 459us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSalesAndLogisticsMember	$ 463us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSalesAndLogisticsMember

X

- Definition

Represents the purchase price accounting adjustments and other required to revise the carrying amount of goodwill to fair value.

+ References

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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- Definition

Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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