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Decommissioning Liabilities - Summary of Changes to the Credit-Adjusted Risk-Free Rate or the Inflation Rate Impact on the Decommissioning Liabilities (Detail) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of other provisions [line items] |  |
Credit-adjusted risk-free rate, sensitivity range | 1.00% | 1.00%
Inflation rate, sensitivity range | 1.00% | 1.00%
One percent increase |  |
Disclosure of other provisions [line items] |  |
Credit-adjusted risk-free rate | $ (487) | $ (387)
Inflation rate | 615 | 519
One percent decrease |  |
Disclosure of other provisions [line items] |  |
Credit-adjusted risk-free rate | 595 | 515
Inflation rate | $ (507) | $ (392)

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- Definition Credit Adjusted Risk Free Rate, Sensitivity Range + References No definition available. + Details
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Namespace Prefix: | cve_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Inflation Rate, Sensitivity Range + References No definition available. + Details
Name: | cve_InflationRateSensitivityRange
Namespace Prefix: | cve_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Theoretical impact to decommissioning liability from increase/decrease in credit -adjusted risk free rate + References No definition available. + Details
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Namespace Prefix: | cve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Theoretical impact to decommissioning liability from increase/decrease in inflation rate + References No definition available. + Details
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Namespace Prefix: | cve_
Data Type: | xbrli:monetaryItemType
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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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- 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: |