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Financial Instruments - Additional Information (Details) - CAD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Disclosure of detailed information about financial instruments [Line Items]
Long-term debt	$ 7,156	$ 7,534
Level 2 of fair value hierarchy
Disclosure of detailed information about financial instruments [Line Items]
Debt, fair value	$ 6,700	$ 6,900

X

- Definition

Fair value debt carried at amortized cost.

+ References

No definition available.

+ Details

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Namespace Prefix:	cve_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of current borrowings and current portion of non-current borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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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X

- Details

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