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Derivatives and Risk Management Activities (Details 3) In Millions, unless otherwise specified	Jun. 30, 2011 USD ($)	Jun. 30, 2011 Foreign exchange forward contract at the rate CAD 0.97 to USD 1.00 maturing in 2011 USD ($) Rate	Jun. 30, 2011 Foreign exchange forward contract at the rate CAD 0.97 to USD 1.00 maturing in 2011 CAD	Jul. 31, 2010 Foreign exchange forward contract at the rate CAD 0.97 to USD 1.00 maturing in 2011 USD ($)	Jun. 30, 2011 Foreign exchange forward contract at the rate CAD 1.01 to USD 1.00 maturing in 2012 CAD Rate	Jun. 30, 2011 Foreign exchange forward contract at the rate CAD 1.00 to USD 1.00 maturing in 2013 USD ($) Rate
Currency Exchange Rate Risk Hedging:
Net deferred gains from currency risk rate hedging included in AOCI	$ 11
Notional amount of outstanding foreign currency forward exchange contracts		59	58		15	9
Average exchange rate for outstanding foreign currency forward exchange contracts		0.97	0.97		1.01	1.00
Forward exchange contract				$ 50

X

- Definition

This element represents the amount of foreign currency that the entity has contractually agreed, or for which it has the option, to buy or sell with respect to the contract being described.

+ Details

Name:	invest_InvestmentForeignCurrencyContractForeignCurrencyAmount
Namespace Prefix:	invest
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

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

+ 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.

+ 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.

+ Details

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