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Leases (Details) - CAD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Lease liabilities [abstract]
Beginning balance, lease liabilities			$ 2,927
Additions			162
Interest Expense (Note 3)	$ 43	$ 40	126	$ 119
Lease Payments			(392)
Divestitures (Note 5)			(39)
Exchange Rate Movements and Other			88
Ending balance, lease liabilities	2,872		2,872
Less: Current Portion	342		342		$ 359
Long-Term Portion	$ 2,530		$ 2,530		$ 2,568

X

- Definition

Increase (decrease) of lease liabilities through foreign currency translation and other.

+ References

No definition available.

+ Details

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

X

- Definition

Lease addition.

+ References

No definition available.

+ Details

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X

- Definition

Lease Liabilities, Divestitures

+ References

No definition available.

+ Details

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Namespace Prefix:	cve_
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Balance Type:	debit
Period Type:	duration

X

- Definition

The cash outflow for leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 53
-Subparagraph g
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-URIDate 2024-03-27

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Balance Type:	credit
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X

- Definition

The amount of current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 47
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-URIDate 2024-03-27

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- Definition

The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 53
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-URIDate 2024-03-27

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X

- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
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- References

No definition available.

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- Definition

The amount of non-current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2024-01-01
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