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Description of Business and Segmented Disclosures - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2023 CAD ($) u_cve_customer plant | Dec. 31, 2022 CAD ($) u_cve_customer
Disclosure of operating segments [line items] |  |
Number of major customers | u_cve_customer | 2 | 2
Gross Sales | $ 55,474 | $ 71,765
Downstream |  |
Disclosure of operating segments [line items] |  |
Gross Sales | $ 32,626 | 38,010
Downstream | Canadian Refining |  |
Disclosure of operating segments [line items] |  |
Number of ethanol plants | plant | 2 |
Gross Sales | $ 6,233 | 7,792
Customer One |  |
Disclosure of operating segments [line items] |  |
Gross Sales | 18,000 | 16,100
Customer Two |  |
Disclosure of operating segments [line items] |  |
Gross Sales | $ 7,100 | $ 9,100
Bottom of range |  |
Disclosure of operating segments [line items] |  |
Percentage of entity's revenues from gross sales | 10.00% |

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- Definition Number of major customers. + References No definition available. + Details
Name: | cve_NumberOfMajorCustomers
Namespace Prefix: | cve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Oil And Gas, Number Of Ethanol Plants + References No definition available. + Details
Name: | cve_OilAndGasNumberOfEthanolPlants
Namespace Prefix: | cve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of entities revenues from gross sales. + References No definition available. + Details
Name: | cve_PercentageOfEntitiesRevenuesFromGrossSales
Namespace Prefix: | cve_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Income before the deduction of royalty expense. + References No definition available. + Details
Name: | cve_RevenueFromGrossSales
Namespace Prefix: | cve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_ProductOrServiceAxis=cve_DownstreamMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SegmentsAxis=cve_CanadianRefiningMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MajorCustomersAxis=cve_CustomerOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MajorCustomersAxis=cve_CustomerTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |