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Description of Business and Segmented Disclosures - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2024 CAD ($) plant u_cve_customer | Dec. 31, 2023 CAD ($) u_cve_customer
Disclosure of operating segments [line items] |  |
Number of ethanol plants | plant | 2 |
Number of major customers | u_cve_customer | 2 | 2
Gross Sales | $ 57,726 | $ 55,474
Downstream |  |
Disclosure of operating segments [line items] |  |
Gross Sales | 33,618 | 32,626
Downstream | Canadian Refining |  |
Disclosure of operating segments [line items] |  |
Gross Sales | 5,310 | 6,233
Customer One |  |
Disclosure of operating segments [line items] |  |
Gross Sales | 17,700 | 18,000
Customer Two |  |
Disclosure of operating segments [line items] |  |
Gross Sales | $ 8,100 | $ 7,100
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 Ethanol Plants + References No definition available. + Details
Name: | cve_NumberOfEthanolPlants
Namespace Prefix: | cve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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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

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- Definition Percentage of entities revenues from gross sales. + References No definition available. + Details
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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
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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
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
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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: |

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