XML 110 R80.htm IDEA: XBRL DOCUMENT v3.21.2

Impairment Charges - Summary of Impairment Losses and Estimated Recoverable Amounts (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2020 CAD ($)
Clearwater
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Impairment Amount	$ 140
Recoverable Amount	306
Kaybob-Edson
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Impairment Amount	175
Recoverable Amount	$ 414

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

X

- Definition

The amount of impairment loss recognised in profit or loss. [Refer: Impairment loss; Profit (loss)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2021-01-01
-Paragraph 126
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_126_a&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2021-01-01
-Paragraph 129
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_129_a&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_ImpairmentLossRecognisedInProfitOrLoss
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The higher of an asset’s (or cash-generating unit’s) fair value less costs of disposal and its value in use. [Refer: Cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2021-01-01
-Paragraph 130
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_130_e&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_RecoverableAmountOfAssetOrCashgeneratingUnit
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=cve_ClearwaterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=cve_KaybobEdsonMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: