XML 204 R159.htm IDEA: XBRL DOCUMENT
v3.20.4

Risk Management - Net Fair Value of Risk Management Positions (Detail) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 CAD ($) $ / bbl MMBbls | Dec. 31, 2019 CAD ($) | Dec. 31, 2018 CAD ($)
Disclosure of Derivative Financial Instruments [Line Items] |  |  |
Fair Value Asset (Liability) | $ (53) | $ 3 | $ 160
Fair value derivative financial instruments [Member] |  |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |  |
Fair Value Asset (Liability) | $ (53) |  |
Fair value derivative financial instruments [Member] | WTI Fixed - Sell [Member] |  |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |  |
Notional Volumes | MMBbls | 19.6 |  |
Terms | January 2021 - June 2022 |  |
Weighted Average Price | $ / bbl | 43.99 |  |
Fair Value Asset (Liability) | $ (113) |  |
Fair value derivative financial instruments [Member] | WTI Fixed - Buy [Member] |  |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |  |
Notional Volumes | MMBbls | 11.7 |  |
Terms | February 2021 - June 2022 |  |
Weighted Average Price | $ / bbl | 44.55 |  |
Fair Value Asset (Liability) | $ 59 |  |
Fair value derivative financial instruments [Member] | Other Financial Positions [Member] |  |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |  |
Fair Value Asset (Liability) | $ 1 |  |

X
- Definition Disclosure of derivative financial instruments. + References No definition available. + Details
Name: | cve_DisclosureOfDerivativeFinancialInstrumentsLineItems
Namespace Prefix: | cve_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of derivative financial instruments asset (liability) net. + References No definition available. + Details
Name: | cve_FairValueOfDerivativeFinancialInstrumentsAssetLiabilityNet
Namespace Prefix: | cve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financial​ instruments​​ notional​ volume. + References No definition available. + Details
Name: | cve_FinancialInstrumentsNotionalVolume
Namespace Prefix: | cve_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financial​ instruments​​ term. + References No definition available. + Details
Name: | cve_FinancialInstrumentsTerm
Namespace Prefix: | cve_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average price of financial instrument. + References No definition available. + Details
Name: | cve_WeightedAveragePriceOfFinancialInstrument
Namespace Prefix: | cve_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | cve_TypesOfFinancialInstrumentsAxis=cve_FairValueDerivativeFinancialInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cve_FinancialInstrumentsAxis=cve_WestTexasIntermediateFixedSellMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cve_FinancialInstrumentsAxis=cve_WestTexasIntermediateFixedBuyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cve_FinancialInstrumentsAxis=cve_OtherFinancialPositionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |