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Contingent Payment - Additional Information (Detail) - Conoco Phillips Company and certain of its subsidiaries - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jun. 30, 2022
Disclosure of contingent liabilities in business combination [line items]
Contingent liabilities outstanding	$ 160	$ 177
Proportion of ownership interest in joint operation	50.00%

X

- Definition

Contingent Liabilities Outstanding

+ References

No definition available.

+ Details

Name:	cve_ContingentLiabilitiesOutstanding
Namespace Prefix:	cve_
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

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

X

- Definition

The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Joint operations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2021-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_21_a_iv&doctype=Standard
-URIDate 2021-03-24

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_BusinessCombinationsAxis=cve_ConocoPhillipsCompanyAndCertainOfItsSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: