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Income Taxes (Detail 2) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income before tax | $ 1,557 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | $ 1,490 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | $ 1,181 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Partnership earnings not subject to current Canadian tax | (976)paa_IncomeNotSubjectToForeignTax | (1,187)paa_IncomeNotSubjectToForeignTax | (1,046)paa_IncomeNotSubjectToForeignTax
Partnership earnings subject to current Canadian tax | 581 paa_IncomeSubjectToForeignTax | 303 paa_IncomeSubjectToForeignTax | 135 paa_IncomeSubjectToForeignTax
Canadian federal and provincial corporate tax rate (as a percent) | 25.00%paa_ForeignTaxRate | 25.00%paa_ForeignTaxRate | 25.00%paa_ForeignTaxRate
Income tax at statutory rate | 145 paa_ForeignIncomeTaxExpenseBenefitAtForeignStatutoryRate | 76 paa_ForeignIncomeTaxExpenseBenefitAtForeignStatutoryRate | 34 paa_ForeignIncomeTaxExpenseBenefitAtForeignStatutoryRate
Canadian withholding tax | 16 paa_ExpenseForWithholdingTaxes | 19 paa_ExpenseForWithholdingTaxes | 18 paa_ExpenseForWithholdingTaxes
Canadian permanent differences and rate changes | 9 paa_ForeignPeriodTaxOnPermanentBookVersusTaxDifferencesAndRateChanges | 3 paa_ForeignPeriodTaxOnPermanentBookVersusTaxDifferencesAndRateChanges |
State income tax | 1 us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations | 1 us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations | 2 us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations
Total income tax expense | 171 us-gaap_IncomeTaxExpenseBenefit | 99 us-gaap_IncomeTaxExpenseBenefit | 54 us-gaap_IncomeTaxExpenseBenefit
Deferred tax assets: |  |  |
Book accruals in excess of current tax deductions | 29 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals | 41 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals |
Net operating losses | 2 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |  |
Derivative instruments |  | 15 us-gaap_DeferredTaxAssetsDerivativeInstruments |
Total deferred tax assets | 31 us-gaap_DeferredTaxAssetsNet | 56 us-gaap_DeferredTaxAssetsNet |
Deferred tax liabilities: |  |  |
Derivative instruments | (71)us-gaap_DeferredTaxLiabilitiesDerivatives |  |
Property and equipment in excess of tax values | (322)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | (332)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment |
Other | (49)us-gaap_DeferredTaxLiabilitiesOther | (66)us-gaap_DeferredTaxLiabilitiesOther |
Total deferred tax liabilities | (442)us-gaap_DeferredIncomeTaxLiabilities | (398)us-gaap_DeferredIncomeTaxLiabilities |
Net deferred tax assets/(liabilities) | (411)us-gaap_DeferredTaxLiabilities | (342)us-gaap_DeferredTaxLiabilities |
Foreign |  |  |
Deferred tax liabilities: |  |  |
Operating loss carryforwards | 8 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  |
Other long-term assets |  |  |
Deferred tax assets: |  |  |
Net deferred tax assets/(liabilities) | 2 us-gaap_DeferredTaxAssetsLiabilitiesNet / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember |  |
Other current liabilities |  |  |
Deferred tax liabilities: |  |  |
Net deferred tax assets/(liabilities) | (64)us-gaap_DeferredTaxLiabilities / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember |  |
Other long-term liabilities |  |  |
Deferred tax liabilities: |  |  |
Net deferred tax assets/(liabilities) | $ (349)us-gaap_DeferredTaxLiabilities / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember | $ (342)us-gaap_DeferredTaxLiabilities / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember |

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- Definition The amount of foreign income tax expense or benefit for the period computed by applying the foreign statutory tax rates to foreign pretax income from continuing operations. + References No definition available. + Details
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- Definition The permanent book versus tax differences in the current foreign income tax expense (benefit) and change in tax rate. + References No definition available. + Details
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- Definition This element represents the rate at which the foreign income of an entity is charged to tax as per the enacted tax laws. + References No definition available. + Details
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- Definition The earnings of the entity which are not subject to foreign enacted tax laws. + References No definition available. + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Liability -URI http://asc.fasb.org/extlink&oid=6510232 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph b(2) -Article 7 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from derivative instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserves and accruals. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31931-109318 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from derivatives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35710027&loc=d3e41242-110953 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 5 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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