XML 177 R132.htm IDEA: XBRL DOCUMENT
v3.20.4

Pensions and Other Post-Employment Benefits - Additional Information (Detail) $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 Age | Dec. 31, 2020 CAD ($) Age
Bottom of Range [Member] |  |
Disclosure Of Defined Benefit Plans [Line Items] |  |
Defined benefit plan, equity securities assets allocation percentage | 25.00% |
Defined benefit plan, fixed income assets allocation percentage | 25.00% |
Defined benefit plan, real estate assets allocation percentage | 0.00% |
Defined benefit plan, listed infrastructure assets allocation percentage | 0.00% |
Defined benefit plan, emerging market debts assets allocation percentage | 0.00% |
Defined benefit plan, cash and cash equivalents assets allocation percentage | 0.00% |
Top of Range [Member] |  |
Disclosure Of Defined Benefit Plans [Line Items] |  |
Defined benefit plan, equity securities assets allocation percentage | 70.00% |
Defined benefit plan, fixed income assets allocation percentage | 35.00% |
Defined benefit plan, real estate assets allocation percentage | 15.00% |
Defined benefit plan, listed infrastructure assets allocation percentage | 10.00% |
Defined benefit plan, emerging market debts assets allocation percentage | 10.00% |
Defined benefit plan, cash and cash equivalents assets allocation percentage | 10.00% |
OPEB [Member] |  |
Disclosure Of Defined Benefit Plans [Line Items] |  |
Maximum age for retired employees eligible for health care dental and life insurance benefits | Age | 65 | 65
Weighted average duration |  | 13 years 3 months 18 days
Pension Benefits [Member] |  |
Disclosure Of Defined Benefit Plans [Line Items] |  |
Weighted average duration |  | 17 years 4 months 24 days
Percentage of employees contribution under pension plan |  | 4.00%
Employer contribution | $ |  | $ 10

X
- Definition Defined benefit plan, cash and cash equivalents assets allocation percentage. + References No definition available. + Details
Name: | cve_DefinedBenefitPlanCashAndCashEquivalentsAssetsAllocationPercentage
Namespace Prefix: | cve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined benefit plan, emerging market debts assets allocation percentage. + References No definition available. + Details
Name: | cve_DefinedBenefitPlanEmergingMarketDebtsAssetsAllocationPercentage
Namespace Prefix: | cve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined benefit plan employee minimum contribution percentage. + References No definition available. + Details
Name: | cve_DefinedBenefitPlanEmployeeMinimumContributionPercentage
Namespace Prefix: | cve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined benefit plan, equity instruments assets allocation percentage. + References No definition available. + Details
Name: | cve_DefinedBenefitPlanEquityInstrumentsAssetsAllocationPercentage
Namespace Prefix: | cve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined benefit plan, fixed income assets allocation percentage. + References No definition available. + Details
Name: | cve_DefinedBenefitPlanFixedIncomeAssetsAllocationPercentage
Namespace Prefix: | cve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined benefit plan, listed infrastructure assets allocation percentage. + References No definition available. + Details
Name: | cve_DefinedBenefitPlanListedInfrastructureAssetsAllocationPercentage
Namespace Prefix: | cve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined benefit plan, real estate assets allocation percentage. + References No definition available. + Details
Name: | cve_DefinedBenefitPlanRealEstateAssetsAllocationPercentage
Namespace Prefix: | cve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum age for retired employees eligible for health care dental and life insurance benefits. + References No definition available. + Details
Name: | cve_MaximumAgeForRetiredEmployeesEligibleForHealthCareDentalAndLifeInsuranceBenefits
Namespace Prefix: | cve_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average duration of defined benefit obligations. + References No definition available. + Details
Name: | cve_WeightedAverageDurationOfDefinedBenefitObligations
Namespace Prefix: | cve_
Data Type: | xbrli:durationItemType
Balance Type: | na
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_DisclosureOfDefinedBenefitPlansLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of employer contributions to retirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2020-01-01 -Paragraph 35 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=26&code=ifrs-tx-2020-en-r&anchor=para_35_b_i&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_EmployerContributions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=cve_OtherPostEmploymentBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=cve_PensionBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |