Line Of Credit Facility, Accordion Feature, Increase Limit

No definition available.

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Namespace Prefix:	paa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the period for which the credit facility may be extended by the entity, pursuant to the terms of the credit agreement.

+ References

No definition available.

+ Details

Name:	paa_LineOfCreditFacilityPeriodForWhichTermOfCreditFacilityMayBeExtended
Namespace Prefix:	paa_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of One Year Extensions Provided for Under Agreement

+ References

No definition available.

+ Details

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Namespace Prefix:	paa_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Schedule of Debt Instruments [Line Items]

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

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+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=paa_TermLoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=paa_SeniorNotesDueInDecember2026At4.50PercentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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- Details

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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Period Type:

Debt - Narrative (Details) $ in Millions	1 Months Ended	6 Months Ended
Debt - Narrative (Details) $ in Millions	Jun. 30, 2026 USD ($) extension	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 25, 2026 USD ($)	Dec. 31, 2025 USD ($)	Nov. 26, 2025 USD ($)
Schedule of Debt Instruments [Line Items]
Outstanding letters of credit	$ 63	$ 63			$ 95
Term Loan Agreement
Schedule of Debt Instruments [Line Items]
Long-term debt						$ 1,100
Senior Notes Due In December 2026 At 4.50 Percent \| Senior Notes
Schedule of Debt Instruments [Line Items]
Long-term debt, gross				$ 750
Debt instrument, interest rate (as a percent)				4.50%
Revolving Credit Facility \| Senior Unsecured Revolving Credit Facility \| Line of credit
Schedule of Debt Instruments [Line Items]
Line of credit facility, maximum borrowing capacity	2,700	2,700
Line of credit facility, current borrowing capacity	1,350	1,350
Line of credit facility, accordion feature, increase limit	$ 4,000	4,000
Line of credit facility period for which term of credit facility may be extended	1 year
Revolving Credit Facility \| Senior Unsecured Revolving Credit Facility \| Line of credit \| Minimum
Schedule of Debt Instruments [Line Items]
Number of one year extensions provided for under agreement \| extension	1
Revolving Credit Facility \| Senior Secured Hedged Inventory Facility \| Line of credit
Schedule of Debt Instruments [Line Items]
Line of credit facility, current borrowing capacity	$ 1,350	1,350
Letter of Credit \| Senior Unsecured Revolving Credit Facility \| Line of credit
Schedule of Debt Instruments [Line Items]
Line of credit facility, maximum borrowing capacity	800	800
Bridge Loan \| Senior Unsecured Revolving Credit Facility \| Line of credit
Schedule of Debt Instruments [Line Items]
Line of credit facility, maximum borrowing capacity	$ 225	225
Line of Credit and Commercial Paper
Schedule of Debt Instruments [Line Items]
Proceeds from issuance of debt		37,100	$ 27,600
Repayments of debt		$ 38,100	$ 27,500