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Partners' Capital and Distributions - Income Allocation (Details)	Dec. 31, 2017
Partners' Capital Notes [Abstract]
Net income allocation	100.00%

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- Definition

Partnership Agreement, Net Income Allocation Percent

+ References

No definition available.

+ Details

Name:	paa_PartnershipAgreementNetIncomeAllocationPercent
Namespace Prefix:	paa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_PartnersCapitalNotesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration