3.5.0.2 html 82 160 1 true 23 0 false 3 false false R1.htm 101 - Document - Document and Entity Information Sheet http://www.imperialoil.ca/taxonomy/role/DocumentandEntityInformation Document and Entity Information Cover 1 false false R2.htm 103 - Statement - Consolidated statement of income Sheet http://www.imperialoil.ca/taxonomy/role/StatementOfIncomeAlternative Consolidated statement of income Statements 2 false false R3.htm 104 - Statement - Consolidated statement of income (Parenthetical) Sheet http://www.imperialoil.ca/taxonomy/role/StatementOfIncomeAlternativeParenthetical Consolidated statement of income (Parenthetical) Statements 3 false false R4.htm 105 - Statement - Consolidated statement of comprehensive income Sheet http://www.imperialoil.ca/taxonomy/role/StatementOfOtherComprehensiveIncome Consolidated statement of comprehensive income Statements 4 false false R5.htm 106 - Statement - Consolidated balance sheet Sheet http://www.imperialoil.ca/taxonomy/role/StatementOfFinancialPositionClassified Consolidated balance sheet Statements 5 false false R6.htm 107 - Statement - Consolidated balance sheet (Parenthetical) Sheet http://www.imperialoil.ca/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical Consolidated balance sheet (Parenthetical) Statements 6 false false R7.htm 108 - Statement - Consolidated statement of cash flows Sheet http://www.imperialoil.ca/taxonomy/role/StatementOfCashFlowsIndirect Consolidated statement of cash flows Statements 7 false false R8.htm 109 - Statement - Consolidated statement of cash flows (Parenthetical) Sheet http://www.imperialoil.ca/taxonomy/role/StatementOfCashFlowsIndirectParenthetical Consolidated statement of cash flows (Parenthetical) Statements 8 false false R9.htm 110 - Disclosure - Basis of financial statement preparation Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsBasisOfPresentationAndSignificantAccountingPoliciesTextBlock Basis of financial statement preparation Notes 9 false false R10.htm 111 - Disclosure - Business segments Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlock Business segments Notes 10 false false R11.htm 112 - Disclosure - Investment and other income Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsInterestAndOtherIncomeTextBlock Investment and other income Notes 11 false false R12.htm 113 - Disclosure - Employee retirement benefits Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlock Employee retirement benefits Notes 12 false false R13.htm 114 - Disclosure - Financing costs and additional notes and loans payable information Notes http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsFinancingCostsAndAdditionalNotesAndLoansPayableInformationTextBlock Financing costs and additional notes and loans payable information Notes 13 false false R14.htm 115 - Disclosure - Long-term debt Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsLongTermDebtTextBlock Long-term debt Notes 14 false false R15.htm 116 - Disclosure - Other long-term obligations Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsOtherLiabilitiesDisclosureTextBlock Other long-term obligations Notes 15 false false R16.htm 117 - Disclosure - Net income (loss) per-share Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlock Net income (loss) per-share Notes 16 false false R17.htm 118 - Disclosure - Other comprehensive income (loss) information Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlock Other comprehensive income (loss) information Notes 17 false false R18.htm 119 - Disclosure - Assets held for sale Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock Assets held for sale Notes 18 false false R19.htm 120 - Disclosure - Accounting for suspended exploratory well costs Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsSuspendedWellCostsDisclosureTextBlock Accounting for suspended exploratory well costs Notes 19 false false R20.htm 121 - Disclosure - Recently issued accounting standards Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsDescriptionOfNewAccountingPronouncementsNotYetAdopted Recently issued accounting standards Notes 20 false false R21.htm 122 - Disclosure - Business segments (Tables) Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables Business segments (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlock 21 false false R22.htm 123 - Disclosure - Investment and other income (Tables) Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsInterestAndOtherIncomeTextBlockTables Investment and other income (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsInterestAndOtherIncomeTextBlock 22 false false R23.htm 124 - Disclosure - Employee retirement benefits (Tables) Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlockTables Employee retirement benefits (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlock 23 false false R24.htm 125 - Disclosure - Financing costs and additional notes and loans payable information (Tables) Notes http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsFinancingCostsAndAdditionalNotesAndLoansPayableInformationTextBlockTables Financing costs and additional notes and loans payable information (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsFinancingCostsAndAdditionalNotesAndLoansPayableInformationTextBlock 24 false false R25.htm 126 - Disclosure - Long-term debt (Tables) Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsLongTermDebtTextBlockTables Long-term debt (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsLongTermDebtTextBlock 25 false false R26.htm 127 - Disclosure - Other long-term obligations (Tables) Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsOtherLiabilitiesDisclosureTextBlockTables Other long-term obligations (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsOtherLiabilitiesDisclosureTextBlock 26 false false R27.htm 128 - Disclosure - Net income (loss) per-share (Tables) Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlockTables Net income (loss) per-share (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlock 27 false false R28.htm 129 - Disclosure - Other comprehensive income (loss) information (Tables) Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables Other comprehensive income (loss) information (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlock 28 false false R29.htm 130 - Disclosure - Assets held for sale (Tables) Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlockTables Assets held for sale (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock 29 false false R30.htm 131 - Disclosure - Recently issued accounting standards (Tables) Sheet http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsDescriptionOfNewAccountingPronouncementsNotYetAdoptedTables Recently issued accounting standards (Tables) Tables http://www.imperialoil.ca/taxonomy/role/NotesToFinancialStatementsDescriptionOfNewAccountingPronouncementsNotYetAdopted 30 false false R31.htm 132 - Disclosure - Business Segments (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureBusinessSegments Business Segments (Detail) Details 31 false false R32.htm 133 - Disclosure - Business Segments (Parenthetical) (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureBusinessSegmentsParenthetical Business Segments (Parenthetical) (Detail) Details 32 false false R33.htm 134 - Disclosure - Gains and Losses on Asset Sales (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureGainsAndLossesOnAssetSales Gains and Losses on Asset Sales (Detail) Details 33 false false R34.htm 135 - Disclosure - Gains and Losses on Asset Sales (Parenthetical) (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureGainsAndLossesOnAssetSalesParenthetical Gains and Losses on Asset Sales (Parenthetical) (Detail) Details 34 false false R35.htm 136 - Disclosure - Investment and Other Income - Additional Information (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureInvestmentAndOtherIncomeAdditionalInformation Investment and Other Income - Additional Information (Detail) Details 35 false false R36.htm 137 - Disclosure - Components of Net Periodic Benefit Cost (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureComponentsOfNetPeriodicBenefitCost Components of Net Periodic Benefit Cost (Detail) Details 36 false false R37.htm 138 - Disclosure - Financing Costs and Additional Notes and Loans Payable Information (Detail) Notes http://www.imperialoil.ca/taxonomy/role/DisclosureFinancingCostsAndAdditionalNotesAndLoansPayableInformation Financing Costs and Additional Notes and Loans Payable Information (Detail) Details 37 false false R38.htm 139 - Disclosure - Financing Costs and Additional Notes and Loans Payable Information - Additional Information (Detail) Notes http://www.imperialoil.ca/taxonomy/role/DisclosureFinancingCostsAndAdditionalNotesAndLoansPayableInformationAdditionalInformation Financing Costs and Additional Notes and Loans Payable Information - Additional Information (Detail) Details 38 false false R39.htm 140 - Disclosure - Long-Term Debt (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureLongTermDebt Long-Term Debt (Detail) Details 39 false false R40.htm 141 - Disclosure - Long-Term Debt - Additional Information (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureLongTermDebtAdditionalInformation Long-Term Debt - Additional Information (Detail) Details 40 false false R41.htm 142 - Disclosure - Other Long-Term Obligations (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureOtherLongTermObligations Other Long-Term Obligations (Detail) Details 41 false false R42.htm 143 - Disclosure - Other Long-Term Obligations (Parenthetical) (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureOtherLongTermObligationsParenthetical Other Long-Term Obligations (Parenthetical) (Detail) Details 42 false false R43.htm 144 - Disclosure - Net Income (Loss) Per Share (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureNetIncomeLossPerShare Net Income (Loss) Per Share (Detail) Details 43 false false R44.htm 145 - Disclosure - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureChangesInAccumulatedOtherComprehensiveIncomeLoss Changes in Accumulated Other Comprehensive Income (Loss) (Detail) Details 44 false false R45.htm 146 - Disclosure - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureAmountsReclassifiedOutOfAccumulatedOtherComprehensiveIncomeLoss Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Detail) Details 45 false false R46.htm 147 - Disclosure - Income Tax Expense (Credit) for Components of Other Comprehensive Income (Loss) (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureIncomeTaxExpenseCreditForComponentsOfOtherComprehensiveIncomeLoss Income Tax Expense (Credit) for Components of Other Comprehensive Income (Loss) (Detail) Details 46 false false R47.htm 148 - Disclosure - Assets Held for Sale - Additional Information (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureAssetsHeldForSaleAdditionalInformation Assets Held for Sale - Additional Information (Detail) Details 47 false false R48.htm 149 - Disclosure - Classes of Assets Classified As Held for Sale within Downstream Segment (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureClassesOfAssetsClassifiedAsHeldForSaleWithinDownstreamSegment Classes of Assets Classified As Held for Sale within Downstream Segment (Detail) Details 48 false false R49.htm 150 - Disclosure - Accounting for Suspended Exploratory Well Costs - Additional Information (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureAccountingForSuspendedExploratoryWellCostsAdditionalInformation Accounting for Suspended Exploratory Well Costs - Additional Information (Detail) Details 49 false false R50.htm 151 - Disclosure - Balance Sheet Classification of Deferred Income Tax Asset / (Liability) (Detail) Sheet http://www.imperialoil.ca/taxonomy/role/DisclosureBalanceSheetClassificationOfDeferredIncomeTaxAssetLiability Balance Sheet Classification of Deferred Income Tax Asset / (Liability) (Detail) Details 50 false false All Reports Book All Reports imo-20160930.xml imo-20160930.xsd imo-20160930_cal.xml imo-20160930_def.xml imo-20160930_lab.xml imo-20160930_pre.xml true true