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Description of Business and Segmented Disclosures - Additional Information (Details)	9 Months Ended
	Sep. 30, 2025 plant
Canadian Refining | Downstream
Disclosure of operating segments [line items]
Number of ethanol plants	2

X

- Definition

Number Of Ethanol Plants

+ References

No definition available.

+ Details

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Namespace Prefix:	cve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_SegmentsAxis=cve_CanadianManufacturingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=cve_DownstreamMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: