3.26.1 html 851 558 1 true 185 0 false 18 false false R1.htm 0000001 - Document - Cover Page Sheet http://www.cnrl.com/role/CoverPage Cover Page Cover 1 false false R2.htm 0000002 - Document - Audit Information Sheet http://www.cnrl.com/role/AuditInformation Audit Information Cover 2 false false R3.htm 9952151 - Statement - Consolidated Balance Sheets Sheet http://www.cnrl.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 3 false false R4.htm 9952152 - Statement - Consolidated Statements of Earnings Sheet http://www.cnrl.com/role/ConsolidatedStatementsofEarnings Consolidated Statements of Earnings Statements 4 false false R5.htm 9952153 - Statement - Consolidated Statements of Comprehensive Income Sheet http://www.cnrl.com/role/ConsolidatedStatementsofComprehensiveIncome Consolidated Statements of Comprehensive Income Statements 5 false false R6.htm 9952154 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) Sheet http://www.cnrl.com/role/ConsolidatedStatementsofComprehensiveIncomeParenthetical Consolidated Statements of Comprehensive Income (Parenthetical) Statements 6 false false R7.htm 9952155 - Statement - Consolidated Statements of Changes in Equity Sheet http://www.cnrl.com/role/ConsolidatedStatementsofChangesinEquity Consolidated Statements of Changes in Equity Statements 7 false false R8.htm 9952156 - Statement - Consolidated Statements of Cash Flows Sheet http://www.cnrl.com/role/ConsolidatedStatementsofCashFlows Consolidated Statements of Cash Flows Statements 8 false false R9.htm 9952157 - Statement - Consolidated Statements of Earnings (Parenthetical) Sheet http://www.cnrl.com/role/ConsolidatedStatementsofEarningsParenthetical Consolidated Statements of Earnings (Parenthetical) Statements 9 false false R10.htm 9952158 - Disclosure - Accounting Policies Sheet http://www.cnrl.com/role/AccountingPolicies Accounting Policies Notes 10 false false R11.htm 9952159 - Disclosure - Accounting Standards Issued But Not Yet Applied Sheet http://www.cnrl.com/role/AccountingStandardsIssuedButNotYetApplied Accounting Standards Issued But Not Yet Applied Notes 11 false false R12.htm 9952160 - Disclosure - Critical Accounting Estimates and Judgements Sheet http://www.cnrl.com/role/CriticalAccountingEstimatesandJudgements Critical Accounting Estimates and Judgements Notes 12 false false R13.htm 9952161 - Disclosure - Inventory Sheet http://www.cnrl.com/role/Inventory Inventory Notes 13 false false R14.htm 9952162 - Disclosure - Exploration and Evaluation Assets Sheet http://www.cnrl.com/role/ExplorationandEvaluationAssets Exploration and Evaluation Assets Notes 14 false false R15.htm 9952163 - Disclosure - Property, Plant and Equipment Sheet http://www.cnrl.com/role/PropertyPlantandEquipment Property, Plant and Equipment Notes 15 false false R16.htm 9952164 - Disclosure - Leases Sheet http://www.cnrl.com/role/Leases Leases Notes 16 false false R17.htm 9952165 - Disclosure - Investments Sheet http://www.cnrl.com/role/Investments Investments Notes 17 false false R18.htm 9952166 - Disclosure - Other Long-Term Assets Sheet http://www.cnrl.com/role/OtherLongTermAssets Other Long-Term Assets Notes 18 false false R19.htm 9952167 - Disclosure - Long-Term Debt Sheet http://www.cnrl.com/role/LongTermDebt Long-Term Debt Notes 19 false false R20.htm 9952168 - Disclosure - Other Long-Term Liabilities Sheet http://www.cnrl.com/role/OtherLongTermLiabilities Other Long-Term Liabilities Notes 20 false false R21.htm 9952169 - Disclosure - Income Taxes Sheet http://www.cnrl.com/role/IncomeTaxes Income Taxes Notes 21 false false R22.htm 9952170 - Disclosure - Share Capital Sheet http://www.cnrl.com/role/ShareCapital Share Capital Notes 22 false false R23.htm 9952171 - Disclosure - Accumulated Other Comprehensive Income Sheet http://www.cnrl.com/role/AccumulatedOtherComprehensiveIncome Accumulated Other Comprehensive Income Notes 23 false false R24.htm 9952172 - Disclosure - Capital Disclosures Sheet http://www.cnrl.com/role/CapitalDisclosures Capital Disclosures Notes 24 false false R25.htm 9952173 - Disclosure - Net Earnings Per Common Share Sheet http://www.cnrl.com/role/NetEarningsPerCommonShare Net Earnings Per Common Share Notes 25 false false R26.htm 9952174 - Disclosure - Interest and Other Financing Expense Sheet http://www.cnrl.com/role/InterestandOtherFinancingExpense Interest and Other Financing Expense Notes 26 false false R27.htm 9952175 - Disclosure - Financial Instruments Sheet http://www.cnrl.com/role/FinancialInstruments Financial Instruments Notes 27 false false R28.htm 9952176 - Disclosure - Commitments and Contingencies Sheet http://www.cnrl.com/role/CommitmentsandContingencies Commitments and Contingencies Notes 28 false false R29.htm 9952177 - Disclosure - Supplemental Disclosure of Cash Flow Information Sheet http://www.cnrl.com/role/SupplementalDisclosureofCashFlowInformation Supplemental Disclosure of Cash Flow Information Notes 29 false false R30.htm 9952178 - Disclosure - Segmented Information Sheet http://www.cnrl.com/role/SegmentedInformation Segmented Information Notes 30 false false R31.htm 9952179 - Disclosure - Remuneration of Directors and Senior Management Sheet http://www.cnrl.com/role/RemunerationofDirectorsandSeniorManagement Remuneration of Directors and Senior Management Notes 31 false false R32.htm 9952180 - Disclosure - Supplementary Oil And Gas Information (Unaudited) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnaudited Supplementary Oil And Gas Information (Unaudited) Notes 32 false false R33.htm 9955511 - Disclosure - Accounting Policies (Policies) Sheet http://www.cnrl.com/role/AccountingPoliciesPolicies Accounting Policies (Policies) Policies http://www.cnrl.com/role/AccountingPolicies 33 false false R34.htm 9955512 - Disclosure - Inventory (Tables) Sheet http://www.cnrl.com/role/InventoryTables Inventory (Tables) Tables http://www.cnrl.com/role/Inventory 34 false false R35.htm 9955513 - Disclosure - Exploration and Evaluation Assets (Tables) Sheet http://www.cnrl.com/role/ExplorationandEvaluationAssetsTables Exploration and Evaluation Assets (Tables) Tables http://www.cnrl.com/role/ExplorationandEvaluationAssets 35 false false R36.htm 9955514 - Disclosure - Property, Plant and Equipment (Tables) Sheet http://www.cnrl.com/role/PropertyPlantandEquipmentTables Property, Plant and Equipment (Tables) Tables http://www.cnrl.com/role/PropertyPlantandEquipment 36 false false R37.htm 9955515 - Disclosure - Leases (Tables) Sheet http://www.cnrl.com/role/LeasesTables Leases (Tables) Tables http://www.cnrl.com/role/Leases 37 false false R38.htm 9955516 - Disclosure - Other Long-Term Assets (Tables) Sheet http://www.cnrl.com/role/OtherLongTermAssetsTables Other Long-Term Assets (Tables) Tables http://www.cnrl.com/role/OtherLongTermAssets 38 false false R39.htm 9955517 - Disclosure - Long-Term Debt (Tables) Sheet http://www.cnrl.com/role/LongTermDebtTables Long-Term Debt (Tables) Tables http://www.cnrl.com/role/LongTermDebt 39 false false R40.htm 9955518 - Disclosure - Other Long-Term Liabilities (Tables) Sheet http://www.cnrl.com/role/OtherLongTermLiabilitiesTables Other Long-Term Liabilities (Tables) Tables http://www.cnrl.com/role/OtherLongTermLiabilities 40 false false R41.htm 9955519 - Disclosure - Income Taxes (Tables) Sheet http://www.cnrl.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.cnrl.com/role/IncomeTaxes 41 false false R42.htm 9955520 - Disclosure - Share Capital (Tables) Sheet http://www.cnrl.com/role/ShareCapitalTables Share Capital (Tables) Tables http://www.cnrl.com/role/ShareCapital 42 false false R43.htm 9955521 - Disclosure - Accumulated Other Comprehensive Income (Tables) Sheet http://www.cnrl.com/role/AccumulatedOtherComprehensiveIncomeTables Accumulated Other Comprehensive Income (Tables) Tables http://www.cnrl.com/role/AccumulatedOtherComprehensiveIncome 43 false false R44.htm 9955522 - Disclosure - Capital Disclosures (Tables) Sheet http://www.cnrl.com/role/CapitalDisclosuresTables Capital Disclosures (Tables) Tables http://www.cnrl.com/role/CapitalDisclosures 44 false false R45.htm 9955523 - Disclosure - Net Earnings Per Common Share (Tables) Sheet http://www.cnrl.com/role/NetEarningsPerCommonShareTables Net Earnings Per Common Share (Tables) Tables http://www.cnrl.com/role/NetEarningsPerCommonShare 45 false false R46.htm 9955524 - Disclosure - Interest and Other Financing Expense (Tables) Sheet http://www.cnrl.com/role/InterestandOtherFinancingExpenseTables Interest and Other Financing Expense (Tables) Tables http://www.cnrl.com/role/InterestandOtherFinancingExpense 46 false false R47.htm 9955525 - Disclosure - Financial Instruments (Tables) Sheet http://www.cnrl.com/role/FinancialInstrumentsTables Financial Instruments (Tables) Tables http://www.cnrl.com/role/FinancialInstruments 47 false false R48.htm 9955526 - Disclosure - Commitments and Contingencies (Tables) Sheet http://www.cnrl.com/role/CommitmentsandContingenciesTables Commitments and Contingencies (Tables) Tables http://www.cnrl.com/role/CommitmentsandContingencies 48 false false R49.htm 9955527 - Disclosure - Supplemental Disclosure of Cash Flow Information (Tables) Sheet http://www.cnrl.com/role/SupplementalDisclosureofCashFlowInformationTables Supplemental Disclosure of Cash Flow Information (Tables) Tables http://www.cnrl.com/role/SupplementalDisclosureofCashFlowInformation 49 false false R50.htm 9955528 - Disclosure - Segmented Information (Tables) Sheet http://www.cnrl.com/role/SegmentedInformationTables Segmented Information (Tables) Tables http://www.cnrl.com/role/SegmentedInformation 50 false false R51.htm 9955529 - Disclosure - Remuneration of Directors and Senior Management (Tables) Sheet http://www.cnrl.com/role/RemunerationofDirectorsandSeniorManagementTables Remuneration of Directors and Senior Management (Tables) Tables http://www.cnrl.com/role/RemunerationofDirectorsandSeniorManagement 51 false false R52.htm 9955530 - Disclosure - Supplementary Oil And Gas Information (Unaudited) (Tables) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables Supplementary Oil And Gas Information (Unaudited) (Tables) Tables http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnaudited 52 false false R53.htm 9955531 - Disclosure - Accounting Policies (Details) Sheet http://www.cnrl.com/role/AccountingPoliciesDetails Accounting Policies (Details) Details http://www.cnrl.com/role/AccountingPoliciesPolicies 53 false false R54.htm 9955532 - Disclosure - Critical Accounting Estimates and Judgements (Details) Sheet http://www.cnrl.com/role/CriticalAccountingEstimatesandJudgementsDetails Critical Accounting Estimates and Judgements (Details) Details http://www.cnrl.com/role/CriticalAccountingEstimatesandJudgements 54 false false R55.htm 9955533 - Disclosure - Inventory - Schedule of Inventory (Details) Sheet http://www.cnrl.com/role/InventoryScheduleofInventoryDetails Inventory - Schedule of Inventory (Details) Details 55 false false R56.htm 9955534 - Disclosure - Inventory - Narrative (Details) Sheet http://www.cnrl.com/role/InventoryNarrativeDetails Inventory - Narrative (Details) Details 56 false false R57.htm 9955535 - Disclosure - Exploration and Evaluation Assets - Detailed Information about Exploration and Evaluation Assets (Details) Sheet http://www.cnrl.com/role/ExplorationandEvaluationAssetsDetailedInformationaboutExplorationandEvaluationAssetsDetails Exploration and Evaluation Assets - Detailed Information about Exploration and Evaluation Assets (Details) Details 57 false false R58.htm 9955536 - Disclosure - Property, Plant and Equipment - Detailed Information About Property, Plant and Equipment (Details) Sheet http://www.cnrl.com/role/PropertyPlantandEquipmentDetailedInformationAboutPropertyPlantandEquipmentDetails Property, Plant and Equipment - Detailed Information About Property, Plant and Equipment (Details) Details 58 false false R59.htm 9955537 - Disclosure - Property, Plant and Equipment - ASOP Asset Swap Transaction Narrative (Details) Sheet http://www.cnrl.com/role/PropertyPlantandEquipmentASOPAssetSwapTransactionNarrativeDetails Property, Plant and Equipment - ASOP Asset Swap Transaction Narrative (Details) Details 59 false false R60.htm 9955538 - Disclosure - Property, Plant and Equipment - Net Assets Acquired and Consideration Exchanged (Details) Sheet http://www.cnrl.com/role/PropertyPlantandEquipmentNetAssetsAcquiredandConsiderationExchangedDetails Property, Plant and Equipment - Net Assets Acquired and Consideration Exchanged (Details) Details 60 false false R61.htm 9955539 - Disclosure - Property, Plant and Equipment - Narrative (Details) Sheet http://www.cnrl.com/role/PropertyPlantandEquipmentNarrativeDetails Property, Plant and Equipment - Narrative (Details) Details 61 false false R62.htm 9955540 - Disclosure - Property, Plant and Equipment - Summary of Net Assets Acquired (Details) Sheet http://www.cnrl.com/role/PropertyPlantandEquipmentSummaryofNetAssetsAcquiredDetails Property, Plant and Equipment - Summary of Net Assets Acquired (Details) Details 62 false false R63.htm 9955541 - Disclosure - Leases - Lease Assets (Details) Sheet http://www.cnrl.com/role/LeasesLeaseAssetsDetails Leases - Lease Assets (Details) Details 63 false false R64.htm 9955542 - Disclosure - Leases - Schedule of Lease Assets (Details) Sheet http://www.cnrl.com/role/LeasesScheduleofLeaseAssetsDetails Leases - Schedule of Lease Assets (Details) Details 64 false false R65.htm 9955543 - Disclosure - Leases - Schedule of Leases Impact on Net Earnings and Cash Flow (Details) Sheet http://www.cnrl.com/role/LeasesScheduleofLeasesImpactonNetEarningsandCashFlowDetails Leases - Schedule of Leases Impact on Net Earnings and Cash Flow (Details) Details 65 false false R66.htm 9955544 - Disclosure - Leases - Schedule of Lease Liabilities (Details) Sheet http://www.cnrl.com/role/LeasesScheduleofLeaseLiabilitiesDetails Leases - Schedule of Lease Liabilities (Details) Details 66 false false R67.htm 9955545 - Disclosure - Investments (Details) Sheet http://www.cnrl.com/role/InvestmentsDetails Investments (Details) Details http://www.cnrl.com/role/Investments 67 false false R68.htm 9955546 - Disclosure - Other Long-Term Assets - Schedule of Other Long-Term Assets (Details) Sheet http://www.cnrl.com/role/OtherLongTermAssetsScheduleofOtherLongTermAssetsDetails Other Long-Term Assets - Schedule of Other Long-Term Assets (Details) Details 68 false false R69.htm 9955547 - Disclosure - Other Long-Term Assets - Narrative (Details) Sheet http://www.cnrl.com/role/OtherLongTermAssetsNarrativeDetails Other Long-Term Assets - Narrative (Details) Details 69 false false R70.htm 9955548 - Disclosure - Other Long-Term Assets - Schedule of Assets, Liabilities, Partners' Equity and Equity (Loss) Income (Details) Sheet http://www.cnrl.com/role/OtherLongTermAssetsScheduleofAssetsLiabilitiesPartnersEquityandEquityLossIncomeDetails Other Long-Term Assets - Schedule of Assets, Liabilities, Partners' Equity and Equity (Loss) Income (Details) Details 70 false false R71.htm 9955549 - Disclosure - Long-Term Debt - Summary of Long-term Debt (Details) Sheet http://www.cnrl.com/role/LongTermDebtSummaryofLongtermDebtDetails Long-Term Debt - Summary of Long-term Debt (Details) Details 71 false false R72.htm 9955550 - Disclosure - Long-Term Debt - Narrative (Details) Sheet http://www.cnrl.com/role/LongTermDebtNarrativeDetails Long-Term Debt - Narrative (Details) Details 72 false false R73.htm 9955551 - Disclosure - Long-Term Debt - Schedule of Debt Repayments (Details) Sheet http://www.cnrl.com/role/LongTermDebtScheduleofDebtRepaymentsDetails Long-Term Debt - Schedule of Debt Repayments (Details) Details 73 false false R74.htm 9955552 - Disclosure - Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Details) Sheet http://www.cnrl.com/role/OtherLongTermLiabilitiesScheduleofOtherLongTermLiabilitiesDetails Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Details) Details 74 false false R75.htm 9955553 - Disclosure - Other Long-Term Liabilities - Narrative (Details) Sheet http://www.cnrl.com/role/OtherLongTermLiabilitiesNarrativeDetails Other Long-Term Liabilities - Narrative (Details) Details 75 false false R76.htm 9955554 - Disclosure - Other Long-Term Liabilities - Asset Retirement Obligations (Details) Sheet http://www.cnrl.com/role/OtherLongTermLiabilitiesAssetRetirementObligationsDetails Other Long-Term Liabilities - Asset Retirement Obligations (Details) Details 76 false false R77.htm 9955555 - Disclosure - Other Long-Term Liabilities - Segmented Asset Retirement Obligations (Details) Sheet http://www.cnrl.com/role/OtherLongTermLiabilitiesSegmentedAssetRetirementObligationsDetails Other Long-Term Liabilities - Segmented Asset Retirement Obligations (Details) Details 77 false false R78.htm 9955556 - Disclosure - Other Long-Term Liabilities - Future Cash Outflow Required to Settle Its Asset Retirement Obligations (Details) Sheet http://www.cnrl.com/role/OtherLongTermLiabilitiesFutureCashOutflowRequiredtoSettleItsAssetRetirementObligationsDetails Other Long-Term Liabilities - Future Cash Outflow Required to Settle Its Asset Retirement Obligations (Details) Details 78 false false R79.htm 9955557 - Disclosure - Other Long-Term Liabilities - Share-Based Compensation (Details) Sheet http://www.cnrl.com/role/OtherLongTermLiabilitiesShareBasedCompensationDetails Other Long-Term Liabilities - Share-Based Compensation (Details) Details 79 false false R80.htm 9955558 - Disclosure - Other Long-Term Liabilities - Weighted Average Assumptions used to Calculate Share-Based Compensation Liability (Details) Sheet http://www.cnrl.com/role/OtherLongTermLiabilitiesWeightedAverageAssumptionsusedtoCalculateShareBasedCompensationLiabilityDetails Other Long-Term Liabilities - Weighted Average Assumptions used to Calculate Share-Based Compensation Liability (Details) Details 80 false false R81.htm 9955559 - Disclosure - Income Taxes - Schedule of Provision for Income Tax (Details) Sheet http://www.cnrl.com/role/IncomeTaxesScheduleofProvisionforIncomeTaxDetails Income Taxes - Schedule of Provision for Income Tax (Details) Details 81 false false R82.htm 9955560 - Disclosure - Income Taxes - Narrative (Details) Sheet http://www.cnrl.com/role/IncomeTaxesNarrativeDetails Income Taxes - Narrative (Details) Details 82 false false R83.htm 9955561 - Disclosure - Income Taxes - Schedule of Provision For Income Tax Rate Reconciliation (Details) Sheet http://www.cnrl.com/role/IncomeTaxesScheduleofProvisionForIncomeTaxRateReconciliationDetails Income Taxes - Schedule of Provision For Income Tax Rate Reconciliation (Details) Details 83 false false R84.htm 9955562 - Disclosure - Income Taxes - Summary of Major Temporary Differences (Details) Sheet http://www.cnrl.com/role/IncomeTaxesSummaryofMajorTemporaryDifferencesDetails Income Taxes - Summary of Major Temporary Differences (Details) Details 84 false false R85.htm 9955563 - Disclosure - Income Taxes - Summary of Movements in Deferred Tax Assets and Liabilities (Details) Sheet http://www.cnrl.com/role/IncomeTaxesSummaryofMovementsinDeferredTaxAssetsandLiabilitiesDetails Income Taxes - Summary of Movements in Deferred Tax Assets and Liabilities (Details) Details 85 false false R86.htm 9955564 - Disclosure - Income Taxes - Summary of Net Deferred Income Tax Liability (Details) Sheet http://www.cnrl.com/role/IncomeTaxesSummaryofNetDeferredIncomeTaxLiabilityDetails Income Taxes - Summary of Net Deferred Income Tax Liability (Details) Details 86 false false R87.htm 9955565 - Disclosure - Share Capital - Outstanding Common Shares (Details) Sheet http://www.cnrl.com/role/ShareCapitalOutstandingCommonSharesDetails Share Capital - Outstanding Common Shares (Details) Details 87 false false R88.htm 9955566 - Disclosure - Share Capital - Narrative (Details) Sheet http://www.cnrl.com/role/ShareCapitalNarrativeDetails Share Capital - Narrative (Details) Details 88 false false R89.htm 9955567 - Disclosure - Share Capital - Stock Option Activity (Details) Sheet http://www.cnrl.com/role/ShareCapitalStockOptionActivityDetails Share Capital - Stock Option Activity (Details) Details 89 false false R90.htm 9955568 - Disclosure - Share Capital - Range of Exercise Prices of Stock Options (Details) Sheet http://www.cnrl.com/role/ShareCapitalRangeofExercisePricesofStockOptionsDetails Share Capital - Range of Exercise Prices of Stock Options (Details) Details 90 false false R91.htm 9955569 - Disclosure - Accumulated Other Comprehensive Income (Details) Sheet http://www.cnrl.com/role/AccumulatedOtherComprehensiveIncomeDetails Accumulated Other Comprehensive Income (Details) Details http://www.cnrl.com/role/AccumulatedOtherComprehensiveIncomeTables 91 false false R92.htm 9955570 - Disclosure - Capital Disclosures - Narrative (Details) Sheet http://www.cnrl.com/role/CapitalDisclosuresNarrativeDetails Capital Disclosures - Narrative (Details) Details 92 false false R93.htm 9955571 - Disclosure - Capital Disclosures - Schedule of Debt to Book Capitalization Ratio (Details) Sheet http://www.cnrl.com/role/CapitalDisclosuresScheduleofDebttoBookCapitalizationRatioDetails Capital Disclosures - Schedule of Debt to Book Capitalization Ratio (Details) Details 93 false false R94.htm 9955572 - Disclosure - Net Earnings Per Common Share - Schedule of Basic and Diluted Net Earnings per Common Share (Details) Sheet http://www.cnrl.com/role/NetEarningsPerCommonShareScheduleofBasicandDilutedNetEarningsperCommonShareDetails Net Earnings Per Common Share - Schedule of Basic and Diluted Net Earnings per Common Share (Details) Details 94 false false R95.htm 9955573 - Disclosure - Net Earnings Per Common Share - Narrative (Details) Sheet http://www.cnrl.com/role/NetEarningsPerCommonShareNarrativeDetails Net Earnings Per Common Share - Narrative (Details) Details 95 false false R96.htm 9955574 - Disclosure - Interest and Other Financing Expense (Details) Sheet http://www.cnrl.com/role/InterestandOtherFinancingExpenseDetails Interest and Other Financing Expense (Details) Details http://www.cnrl.com/role/InterestandOtherFinancingExpenseTables 96 false false R97.htm 9955575 - Disclosure - Financial Instruments - Estimated Fair Values of Derivative Financial Instruments Included in Risk Management Asset (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsEstimatedFairValuesofDerivativeFinancialInstrumentsIncludedinRiskManagementAssetDetails Financial Instruments - Estimated Fair Values of Derivative Financial Instruments Included in Risk Management Asset (Details) Details 97 false false R98.htm 9955576 - Disclosure - Financial Instruments - Net (Gain) Loss from Risk Management Activities (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsNetGainLossfromRiskManagementActivitiesDetails Financial Instruments - Net (Gain) Loss from Risk Management Activities (Details) Details 98 false false R99.htm 9955577 - Disclosure - Financial Instruments - Carrying Amounts and Fair Values of Financial Instruments (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsCarryingAmountsandFairValuesofFinancialInstrumentsDetails Financial Instruments - Carrying Amounts and Fair Values of Financial Instruments (Details) Details 99 false false R100.htm 9955578 - Disclosure - Financial Instruments - Carrying Amounts and Reconciliation of Derivative Financial Instruments (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsCarryingAmountsandReconciliationofDerivativeFinancialInstrumentsDetails Financial Instruments - Carrying Amounts and Reconciliation of Derivative Financial Instruments (Details) Details 100 false false R101.htm 9955579 - Disclosure - Financial Instruments - Embedded Derivative Contract Narrative (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsEmbeddedDerivativeContractNarrativeDetails Financial Instruments - Embedded Derivative Contract Narrative (Details) Details 101 false false R102.htm 9955580 - Disclosure - Financial Instruments - Embedded Derivative Contract (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsEmbeddedDerivativeContractDetails Financial Instruments - Embedded Derivative Contract (Details) Details 102 false false R103.htm 9955581 - Disclosure - Financial Instruments - Price and Discount Rate Sensitivities (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsPriceandDiscountRateSensitivitiesDetails Financial Instruments - Price and Discount Rate Sensitivities (Details) Details 103 false false R104.htm 9955582 - Disclosure - Financial Instruments - Foreign Currency Exchange Rate Risk Management Narrative (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsForeignCurrencyExchangeRateRiskManagementNarrativeDetails Financial Instruments - Foreign Currency Exchange Rate Risk Management Narrative (Details) Details 104 false false R105.htm 9955583 - Disclosure - Financial Instruments - Financial Instrument Sensitivities (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsFinancialInstrumentSensitivitiesDetails Financial Instruments - Financial Instrument Sensitivities (Details) Details 105 false false R106.htm 9955584 - Disclosure - Financial Instruments - Counterparty Credit Risk Management Narrative (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsCounterpartyCreditRiskManagementNarrativeDetails Financial Instruments - Counterparty Credit Risk Management Narrative (Details) Details 106 false false R107.htm 9955585 - Disclosure - Financial Instruments - Maturity Dates for Financial Liabilities (Details) Sheet http://www.cnrl.com/role/FinancialInstrumentsMaturityDatesforFinancialLiabilitiesDetails Financial Instruments - Maturity Dates for Financial Liabilities (Details) Details 107 false false R108.htm 9955586 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.cnrl.com/role/CommitmentsandContingenciesDetails Commitments and Contingencies (Details) Details http://www.cnrl.com/role/CommitmentsandContingenciesTables 108 false false R109.htm 9955587 - Disclosure - Supplemental Disclosure of Cash Flow Information - Supplemental Schedule of Cash Flow Information (Details) Sheet http://www.cnrl.com/role/SupplementalDisclosureofCashFlowInformationSupplementalScheduleofCashFlowInformationDetails Supplemental Disclosure of Cash Flow Information - Supplemental Schedule of Cash Flow Information (Details) Details 109 false false R110.htm 9955588 - Disclosure - Supplemental Disclosure of Cash Flow Information - Liabilities Arising from Financing Activities (Details) Sheet http://www.cnrl.com/role/SupplementalDisclosureofCashFlowInformationLiabilitiesArisingfromFinancingActivitiesDetails Supplemental Disclosure of Cash Flow Information - Liabilities Arising from Financing Activities (Details) Details 110 false false R111.htm 9955589 - Disclosure - Segmented Information - Narrative (Details) Sheet http://www.cnrl.com/role/SegmentedInformationNarrativeDetails Segmented Information - Narrative (Details) Details 111 false false R112.htm 9955590 - Disclosure - Segmented Information - Operating Segments Earnings (Details) Sheet http://www.cnrl.com/role/SegmentedInformationOperatingSegmentsEarningsDetails Segmented Information - Operating Segments Earnings (Details) Details 112 false false R113.htm 9955591 - Disclosure - Segmented Information - Capital Expenditures (Details) Sheet http://www.cnrl.com/role/SegmentedInformationCapitalExpendituresDetails Segmented Information - Capital Expenditures (Details) Details 113 false false R114.htm 9955592 - Disclosure - Segmented Information - Segmented Assets (Details) Sheet http://www.cnrl.com/role/SegmentedInformationSegmentedAssetsDetails Segmented Information - Segmented Assets (Details) Details 114 false false R115.htm 9955593 - Disclosure - Remuneration of Directors and Senior Management (Details) Sheet http://www.cnrl.com/role/RemunerationofDirectorsandSeniorManagementDetails Remuneration of Directors and Senior Management (Details) Details http://www.cnrl.com/role/RemunerationofDirectorsandSeniorManagementTables 115 false false R116.htm 9955594 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Twelve Month Average Benchmark Prices (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTwelveMonthAverageBenchmarkPricesDetails Supplementary Oil And Gas Information (Unaudited) - Twelve Month Average Benchmark Prices (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 116 false false R117.htm 9955595 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Proved and Proved Developed Oil and Natural Gas Liquids, Net of Royalties (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedProvedandProvedDevelopedOilandNaturalGasLiquidsNetofRoyaltiesDetails Supplementary Oil And Gas Information (Unaudited) - Proved and Proved Developed Oil and Natural Gas Liquids, Net of Royalties (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 117 false false R118.htm 9955596 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Oil and Natural Gas Liquids Narrative (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedOilandNaturalGasLiquidsNarrativeDetails Supplementary Oil And Gas Information (Unaudited) - Oil and Natural Gas Liquids Narrative (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 118 false false R119.htm 9955597 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Proved and Proved Developed Natural Gas Reserve Quantities (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedProvedandProvedDevelopedNaturalGasReserveQuantitiesDetails Supplementary Oil And Gas Information (Unaudited) - Proved and Proved Developed Natural Gas Reserve Quantities (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 119 false false R120.htm 9955598 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Natural Gas Narrative (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedNaturalGasNarrativeDetails Supplementary Oil And Gas Information (Unaudited) - Natural Gas Narrative (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 120 false false R121.htm 9955599 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Capitalized Costs Related to Crude Oil and Natural Gas Activities (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedCapitalizedCostsRelatedtoCrudeOilandNaturalGasActivitiesDetails Supplementary Oil And Gas Information (Unaudited) - Capitalized Costs Related to Crude Oil and Natural Gas Activities (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 121 false false R122.htm 9955600 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Costs Incurred in Crude Oil and Natural Gas Activities (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedCostsIncurredinCrudeOilandNaturalGasActivitiesDetails Supplementary Oil And Gas Information (Unaudited) - Costs Incurred in Crude Oil and Natural Gas Activities (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 122 false false R123.htm 9955601 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Results of Operations from Crude Oil and Natural Gas Producing Activities (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedResultsofOperationsfromCrudeOilandNaturalGasProducingActivitiesDetails Supplementary Oil And Gas Information (Unaudited) - Results of Operations from Crude Oil and Natural Gas Producing Activities (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 123 false false R124.htm 9955602 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Future Net Cash Flows Relating to Proved Crude Oil and Natural Gas Reserves (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedFutureNetCashFlowsRelatingtoProvedCrudeOilandNaturalGasReservesDetails Supplementary Oil And Gas Information (Unaudited) - Future Net Cash Flows Relating to Proved Crude Oil and Natural Gas Reserves (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 124 false false R125.htm 9955603 - Disclosure - Supplementary Oil And Gas Information (Unaudited) - Sources of Change in the Standardized Measure of Discounted Future Net Cash Flows (Details) Sheet http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedSourcesofChangeintheStandardizedMeasureofDiscountedFutureNetCashFlowsDetails Supplementary Oil And Gas Information (Unaudited) - Sources of Change in the Standardized Measure of Discounted Future Net Cash Flows (Details) Details http://www.cnrl.com/role/SupplementaryOilAndGasInformationUnauditedTables 125 false false All Reports Book All Reports cnq-20251231.htm cnq-20251231_d2.htm cnq-20251231.xsd cnq-20251231_cal.xml cnq-20251231_def.xml cnq-20251231_lab.xml cnq-20251231_pre.xml cnq-20251231_g1.jpg cnq-20251231_g2.jpg cnq-20251231_g3.jpg cnq-20251231_g4.jpg cnq-20251231_g5.jpg cnq-20251231_g6.jpg cnq-20251231_g7.jpg http://fasb.org/srt/2025 http://xbrl.sec.gov/dei/2025 https://xbrl.ifrs.org/taxonomy/2025-03-27/ifrs-full true true