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Derivatives and Risk Management Activities (Details 3) In Millions, unless otherwise specified	Mar. 31, 2012 USD ($)	Mar. 31, 2012 Foreign exchange forward contract at the rate CAD 1.01 to USD 1.00 maturing in 2012 USD ($) rate	Mar. 31, 2012 Foreign exchange forward contract at the rate CAD 1.01 to USD 1.00 maturing in 2012 CAD	Mar. 31, 2012 Foreign exchange forward contract at the rate CAD 1.00 to USD 1.00 maturing in 2013 USD ($) rate	Mar. 31, 2012 Foreign exchange forward contract at the rate CAD 1.00 to USD 1.00 maturing in 2013 CAD
Currency Exchange Rate Risk Hedging:
Net deferred gains from currency risk rate hedging included in AOCI	$ 9
Notional amount of outstanding foreign currency forward exchange contracts		$ 11	11	$ 9	9
Average exchange rate for outstanding foreign currency forward exchange contracts		1.01	1.01	1.00	1.00

X

- Definition

This element represents the gain or loss on open and settled foreign currency cash flow hedges, which are included in AOCI.

+ References

No definition available.

+ Details

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

X

- Definition

The average contractual rate at which a foreign currency can be purchased or sold under the terms of a group of foreign currency derivative contracts.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeAverageForwardExchangeRate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Details

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

X

- Definition

Aggregate notional amount of foreign currency exchange rate derivatives. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

+ Details

Name:	us-gaap_NotionalAmountOfForeignCurrencyDerivatives
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant