Average Contract Financial Term

No definition available.

Name:	cve_AverageContractFinancialTerm
Namespace Prefix:	cve_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of derivative financial instruments net.

+ References

No definition available.

+ Details

Name:	cve_FairValueOfDerivativeFinancialInstrumentsNet
Namespace Prefix:	cve_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of days outstanding for credit exposures using external credit grading system.

+ References

No definition available.

+ Details

Name:	cve_NumberOfDaysOutstandingForCreditExposuresUsingExternalCreditGradingSystem
Namespace Prefix:	cve_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage Of Accounts Receivable Outstanding, Less than 60 Days

+ References

No definition available.

+ Details

Name:	cve_PercentageOfAccountsReceivableOutstandingLessThan60Days
Namespace Prefix:	cve_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of credit exposures using external credit grading system.

+ References

No definition available.

+ Details

Name:	cve_PercentageOfCreditExposuresUsingExternalCreditGradingSystem
Namespace Prefix:	cve_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Target net debt to adjusted earnings before interest taxes depreciation depletion and amortization ratio.

+ References

No definition available.

+ Details

Name:	cve_TargetNetDebtToAdjustedEarningsBeforeInterestTaxesDepreciationDepletionAndAmortizationRatio
Namespace Prefix:	cve_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

The rate of expected credit losses, calculated as percentage of the gross carrying amount. Expected credit losses are the weighted average of credit losses with the respective risks of a default occurring as the weights.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 35N
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35N&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph IG20D
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_IG20D&doctype=Implementation%20Guidance
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_ExpectedCreditLossRate
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_NotionalAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	cve_TypesOfFinancialInstrumentsAxis=cve_FairValueDerivativeFinancialInstrumentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=cve_ForeignExchangeContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=cve_InterestRateForeignExchangeCrossCurrencyInterestRateSwapsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=ifrs-full_TradeReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CreditRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ExternalCreditGradesAxis=cve_InvestmentGradeCounterpartiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
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Risk Management - Additional Information (Detail) $ in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 CAD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 CAD ($)
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items]
Fair value of derivative financial instruments net		$ (27)		$ 46
Percentage of accounts receivable outstanding, less than 60 days	98.00%	98.00%
Target net debt to adjusted EBITDA ratio	1.0
Fair Value Derivative Financial Instruments
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items]
Average contract financial term	1 year
Foreign Exchange Contracts
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items]
Fair value of derivative financial instruments net		$ (1)
Notional value	$ 302		$ 168
Interest Rate, Foreign Exchange or Cross Currency Interest Rate Swap
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items]
Notional value	$ 0		$ 0
Trade Receivables \| Credit risk
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items]
Average expected credit loss rate	0.60%	0.60%	0.40%	0.40%
Trade Receivables \| Credit risk \| Investment grade counterparties
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items]
Number of days outstanding for accruals, joint operations, trade receivables and net investment in finance leases	60 days	60 days
Trade Receivables \| Credit risk \| Investment grade counterparties \| Minimum
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items]
Percent of accounts receivable held with investment grade counterparties	83.00%	83.00%	85.00%	85.00%