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Financial Instruments - Summary of Changes in Inputs to Option Pricing Model, Resulted in Unrealized Gains (Losses) Impacting Earnings Before Income Tax (Detail) - WCS Forward Prices $ in Millions | 12 Months Ended
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Dec. 31, 2023 CAD ($) $ / bbl | Dec. 31, 2022 CAD ($)
Disclosure Of Sensitivity Of Fair Value Measurement To Changes In Unobservable Inputs Liabilities [Line Items] |  |
Sensitivity price range | $ / bbl | 10.00 |
Increase | $ (21) | $ (68)
Decrease | $ 45 | $ 157

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- Definition Contingent liabilities sensitivity price range. + References No definition available. + Details
Name: | cve_ContingentLiabilitiesSensitivityPriceRange
Namespace Prefix: | cve_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

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- Definition Disclosure of sensitivity of fair value measurement to changes in unobservable inputs liabilities. + References No definition available. + Details
Name: | cve_DisclosureOfSensitivityOfFairValueMeasurementToChangesInUnobservableInputsLiabilitiesLineItems
Namespace Prefix: | cve_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Theoretical impact to net earnings before tax from decrease in option pricing model sensitivity inputs. + References No definition available. + Details
Name: | cve_TheoreticalImpactToNetEarningsBeforeTaxFromDecreaseInOptionPricingModelSensitivityInputs
Namespace Prefix: | cve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Theoretical impact to net earnings before tax from increase in option pricing model sensitivity inputs. + References No definition available. + Details
Name: | cve_TheoreticalImpactToNetEarningsBeforeTaxFromIncreaseInOptionPricingModelSensitivityInputs
Namespace Prefix: | cve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | ifrs-full_ItemsOfContingentLiabilitiesAxis=cve_WesternCanadianSelectForwardPricingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |