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Commitments and Contingencies - Additional Information (Details) - CAD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |
Transportation and storage | $ 24,371 |
Total commitments | 27,241 |
Outstanding letters of credit | $ 338 | $ 355
Minimum |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |
Transportation commitments subject to regulatory approval or approved but not yet in service term | 15 years |
Commitments approved and not yet in service |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |
Transportation and storage | $ 1,500 |
HMLP |  |
Disclosure Of Commitments And Contingent Liabilities [Line Items] |  |
Total commitments | $ 1,700 |

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- Definition Contractual Commitments For Transportation and Storage + 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 Disclosure Of Commitments And Contingent Liabilities [Line Items] + References No definition available. + Details
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- Definition Letters of credit issued as security for performance. + 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 Transportation Commitments Subject To Regulatory Approval Or Approved But Not Yet In Service Term + References No definition available. + Details
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Namespace Prefix: | cve_
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- Definition The amount of future capital expenditures that the entity is committed to make. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- 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: |
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Balance Type: |
Period Type: |