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Exploration and Evaluation Assets - Summary of Exploration and Valuation Assets (Parenthetical) (Detail) $ in Millions	Dec. 31, 2020 CAD ($)
Marten Hills Asset [Member]
Disclosure Of Exploration And Evaluation Assets [Line Items]
Gross overriding royalty	$ 41

X

- Definition

Disclosure of exploration and evaluation assets line items.

+ References

No definition available.

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- Definition

Gross overriding royalty.

+ References

No definition available.

+ Details

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

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- Details

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Namespace Prefix:
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Balance Type:
Period Type: