XML 139 R111.htm IDEA: XBRL DOCUMENT v3.21.1

Remuneration of Directors and Senior Management (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Non-management directors
Disclosure of transactions between related parties [line items]
Fees earned and salary	$ 2	$ 2	$ 2
Senior management
Disclosure of transactions between related parties [line items]
Fees earned and salary	2	2	2
Common stock option based awards	9	8	8
Annual incentive plans	4	6	4
Long-term incentive plans	14	20	15
Total	$ 29	$ 36	$ 29

X

- Definition

Key Management Personnel Compensation, Annual Incentive Plans

+ References

No definition available.

+ Details

Name:	cnq_KeyManagementPersonnelCompensationAnnualIncentivePlans
Namespace Prefix:	cnq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Key Management Personnel Compensation, Long-Term Share-Based Payment

+ References

No definition available.

+ Details

Name:	cnq_KeyManagementPersonnelCompensationLongTermShareBasedPayment
Namespace Prefix:	cnq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Key Management Personnel Compensation, Options Issued

+ References

No definition available.

+ Details

Name:	cnq_KeyManagementPersonnelCompensationOptionsIssued
Namespace Prefix:	cnq_
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_DisclosureOfTransactionsBetweenRelatedPartiesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2020-01-01
-Paragraph 17
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_17&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_KeyManagementPersonnelCompensation
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of compensation to key management personnel in the form of short-term employee benefits. [Refer: Key management personnel of entity or parent [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2020-01-01
-Paragraph 17
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_17_a&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=cnq_KeyManagementPersonnelOfEntityOrParentNonManagementDirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=cnq_KeyManagementPersonnelOfEntityOrParentSeniorManagementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: