XML 84 R110.htm IDEA: XBRL DOCUMENT
v3.20.1

Supplemental Disclosure of Cash Flow Information - Liabilities Arising From Financing Activities (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |
Liabilities arising from financing activities, beginning balance | $ 20,262 | $ 22,319
Changes in liabilities arising from financing activities [abstract] |  |
Issue of long-term debt | 1,025 | (2,831)
Payment of lease liabilities | (237) |
Increase through new leases, liabilities arising from financing activities | 527 |
Non-cash changes | (524) | 774
Liabilities arising from financing activities, ending balance | 22,592 | 20,262
Long-term debt |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |
Liabilities arising from financing activities, beginning balance | 20,623 | 22,458
Changes in liabilities arising from financing activities [abstract] |  |
Issue of long-term debt | 1,025 | (2,831)
Non-cash changes | (666) | 996
Liabilities arising from financing activities, ending balance | 20,982 | 20,623
Cash flow hedges on US dollar debt securities |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |
Liabilities arising from financing activities, beginning balance | (361) | (139)
Changes in liabilities arising from financing activities [abstract] |  |
Issue of long-term debt | 0 | 0
Non-cash changes | 162 | (222)
Liabilities arising from financing activities, ending balance | (199) | (361)
Lease liabilities |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |
Liabilities arising from financing activities, beginning balance | 0 |
Changes in liabilities arising from financing activities [abstract] |  |
Payment of lease liabilities | (237) |
Increase through new leases, liabilities arising from financing activities | 527 |
Non-cash changes | (20) |
Liabilities arising from financing activities, ending balance | $ 1,809 | $ 0

X
- Definition Increase (Decrease) Through Financing Cash Flows, Proceeds (Payments) from Long-Term Borrowings, Liabilities Arising From Financing Activities + References No definition available. + Details
Name: | cnq_IncreaseDecreaseThroughFinancingCashFlowsProceedsPaymentsfromLongTermBorrowingsLiabilitiesArisingFromFinancingActivities
Namespace Prefix: | cnq_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
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_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase (decrease) in liabilities arising from financing activities resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 44B -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_44B_e&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase in liabilities arising from financing activities resulting from new leases. [Refer: Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Section A Statement of cash flows for an entity other than a financial institution -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&doctype=Illustrative%20Examples&dita_xref=IAS07_IE_A_TI -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 44B -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_44B&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of liabilities for which cash flows were, or future cash flows will be, classified in the statement of cash flows as cash flows from financing activities. [Refer: Cash flows from (used in) financing activities; Liabilities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 44D -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_44D&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_LiabilitiesArisingFromFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow for payment of lease liabilities, classified as financing activities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 17 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_17_e&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis=ifrs-full_LongtermBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis=ifrs-full_AssetsHeldToHedgeLiabilitiesArisingFromFinancingActivitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis=ifrs-full_LeaseLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |