Decommissioning, Restoration, And Rehabilitation Liabilities, Period Of Accretion

No definition available.

Name:	cnq_DecommissioningRestorationAndRehabilitationLiabilitiesPeriodOfAccretion
Namespace Prefix:	cnq_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Inflation Rate

+ References

No definition available.

+ Details

Name:	cnq_InflationRate
Namespace Prefix:	cnq_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted Average Discount Rate Used In Current Measurement Of Provision For Decommissioning, Restoration And Rehabilitation Costs

+ References

No definition available.

+ Details

Name:	cnq_WeightedAverageDiscountRateUsedInCurrentMeasurementOfProvisionForDecommissioningRestorationAndRehabilitationCosts
Namespace Prefix:	cnq_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

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

- Definition

The intrinsic value of liabilities arising from share-based transactions for which the counterparty's right to cash or other assets had vested by the end of the period (for example, vested share appreciation rights). The intrinsic value is the difference between the fair value of the shares to which the counterparty has the (conditional or unconditional) right to subscribe, or which it has the right to receive, and the price (if any) that the counterparty is (or will be) required to pay for those shares. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services, for which the counterparty's right to cash or other assets had vested by the end of the period (for example, vested share appreciation rights).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2024-01-01
-Paragraph 51
-Subparagraph b
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_51_b_ii&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_IntrinsicValueOfLiabilitiesFromSharebasedPaymentTransactionsForWhichCounterpartysRightToCashOrOtherAssetsVested2011
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Types of share-based payment arrangements [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2024-01-01
-Paragraph 51
-Subparagraph b
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_51_b_i&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cnq_EmployeeStockOption1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=cnq_CertainExecutivesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=cnq_PerformanceShareUnitsPSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfProvisionsAxis=ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Other Long-Term Liabilities - Narrative (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of other provisions [line items]
Asset retirement obligations settlement period	60 years
Inflation rate	2.00%	2.00%	2.00%
Share-based compensation	$ 620	$ 780	$ 832	$ 489
Stock options
Disclosure of other provisions [line items]
Intrinsic value of vested stock options	181	164	208
Certain Executives \| Performance Share Units
Disclosure of other provisions [line items]
Share-based compensation	$ 99	$ 96	$ 127
Provision for decommissioning, restoration and rehabilitation costs
Disclosure of other provisions [line items]
Weighted average discount rate	4.80%	5.20%	5.60%