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Debt (Details 2) (PAA senior unsecured 364-day revolving credit facility, USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	Jan. 31, 2011	Jun. 30, 2011
PAA senior unsecured 364-day revolving credit facility
Debt
Initiation Date	January 2011
Expiration Date	January 2012
Borrowing capacity	$ 500
Maximum Debt-to-EBITDA coverage ratio		4.75 to 1.0
Maximum Debt-to-EBITDA coverage ratio during an acquisition period		5.5 to 1.0
Basis Variable interest rate used		LIBOR
Minimum percentage of commitment fees payable (as a percent)		0.15%
Maximum percentage of commitment fees payable (as a percent)		0.40%

X

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ Details

Name:	paa_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	paa
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The fee, expressed as a maximum percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ Details

Name:	paa_LineOfCreditFacilityCommitmentFeePercentageMaximum
Namespace Prefix:	paa
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The fee, expressed as a minimum percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ Details

Name:	paa_LineOfCreditFacilityCommitmentFeePercentageMinimum
Namespace Prefix:	paa
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the maximum debt-to-EBITDA coverage ratio for the credit facility.

+ Details

Name:	paa_LineOfCreditFacilityDebtToEBITDACoverageRatio
Namespace Prefix:	paa
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the maximum debt-to-EBITDA coverage ratio during the acquisition period for the credit facility.

+ Details

Name:	paa_LineOfCreditFacilityDebtToEBITDACoverageRatioDuringAcquisitionPeriod
Namespace Prefix:	paa
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Reflects when the credit facility terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 2, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate
Namespace Prefix:	us-gaap
Data Type:	us-types:dateStringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Reflects when the credit facility first became available, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 2, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityInitiationDate
Namespace Prefix:	us-gaap
Data Type:	us-types:dateStringItemType
Balance Type:	na
Period Type:	duration