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Debt and Capital Structure - Summary of Net Debt to Adjusted Funds Flow (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Borrowings [abstract] |  |  |
Net Debt | $ 4,282 | $ 9,591 | $ 7,184
Cash flows from (used in) operating activities | 11,403 | 5,919 | 273
Settlement of Decommissioning Liabilities | (150) | (102) | (42)
Net Change In Non-Cash Working Capital | 575 | (1,227) | 198
Adjusted Funds Flow | $ 10,978 | $ 7,248 | $ 117
Net Debt To Adjusted Funds Flow | 40.00% | 130.00% | 6140.00%

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- Definition The cash flows from (used in) operating activities, which are the principal revenue-producing activities of the entity and other activities that are not investing or financing activities. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 10 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_10&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 50 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_50_d&doctype=Standard -URIDate 2022-03-24 + Details
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