XML 192 R147.htm IDEA: XBRL DOCUMENT
v3.20.4

Stock-Based Compensation Plans - Summary of Stock-Based Compensation (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |
Stock-Based Compensation Expense | $ 49 | $ 67 | $ 9
Stock-Based Compensation Costs Capitalized | 16 | 20 | 4
Total Stock-Based Compensation | 65 | 87 | 13
Net Settlement Rights [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |
Stock-Based Compensation Expense | 11 | 9 | 6
Performance Share Units [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |
Stock-Based Compensation Expense | 19 | 15 | (6)
Restricted Share Units [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |
Stock-Based Compensation Expense | 23 | 34 | $ 9
Deferred Share Units [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |
Stock-Based Compensation Expense | $ (4) | $ 9 |

X
- Definition Expense from share based payment transactions in which goods or services received qualified for recognition as assets. + References No definition available. + Details
Name: | cve_ExpenseFromShareBasedPaymentTransactionsInWhichGoodsOrServicesReceivedQualifiedForRecognitionAsAssets
Namespace Prefix: | cve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share-based payment transactions with employees recorded as expense. + References No definition available. + Details
Name: | cve_ShareBasedPaymentTransactionsWithEmployeesRecordedAsExpense
Namespace Prefix: | cve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Stock based compensations. + References No definition available. + Details
Name: | cve_StockBasedCompensations
Namespace Prefix: | cve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cve_NetSettlementRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cve_PerformanceShareUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cve_RestrictedShareUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cve_DeferredShareUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |