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Description of Business and Segmented Disclosures - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2022 CAD ($) Customer | Dec. 31, 2021 CAD ($) Customer | Dec. 31, 2020 CAD ($) Customer
Disclosure of operating segments [line items] |  |  |  |  |
Number of major customers | Customer | 2 | 2 |  | 3 |
Gross Sales | $ 71,765 | $ 48,811 | [1] | $ 13,914 | [1]
Customer One |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Gross Sales | 16,100 | 8,500 |  | 4,300 |
Customer Two |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Gross Sales | $ 9,100 | $ 6,800 |  | 1,800 |
Customer Three |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Gross Sales |  |  |  | $ 1,500 |
Bottom of range |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Percentage of entity's revenues from gross sales | 10.00% |  |  |  |
[1] | See Note 3X for revisions to prior period results.

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |