XML 127 R97.htm IDEA: XBRL DOCUMENT v3.8.0.1

FINANCIAL INSTRUMENTS - Counterparty credit risk management (Details) - CAD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information about financial instruments [line items]
Derivative financial asset (liability), net	$ 101	$ 489	$ 854
Credit risk
Disclosure of detailed information about financial instruments [line items]
Derivative financial asset (liability), net	$ 187	$ 489

X

- Definition

Derivative Financial Assets (Liabilities), Net

+ References

No definition available.

+ Details

Name:	cnq_DerivativeFinancialAssetsLiabilitiesNet
Namespace Prefix:	cnq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CreditRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: