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Finance Costs - Schedule of Finance Costs (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Finance Costs [Abstract] |  |  |  |  |
Interest Expense – Short-Term Borrowings and Long-Term Debt | $ 478 | $ 557 |  | $ 392 |
Net Premium (Discount) on Redemption of Long-Term Debt | (29) | 121 |  | (25) |
Interest Expense – Lease Liabilities (Note 27) | 163 | 171 |  | 87 |
Unwinding of Discount on Decommissioning Liabilities (Note 29) | 176 | 199 |  | 57 |
Other | 37 | 34 |  | 25 |
Total finance costs excluding capitalized interest | 825 | 1,082 |  | 536 |
Capitalized Interest | (5) | 0 |  | 0 |
Finance Costs | $ 820 | $ 1,082 | [1] | $ 536 | [1]
[1] | See Note 3X for revisions to prior period results.

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- Definition Capitalized Interest + References No definition available. + Details
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- References No definition available. + Details
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- Definition Finance Costs Excluding Capitalized Interest + References No definition available. + Details
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- Definition Net premium (discount) on redemption of long-term debt. + References No definition available. + Details
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- Definition The amount of expense recognised due to the unwinding of the discount on provisions other than provisions from employee benefits, resulting from the effect of the passage of time. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of costs associated with financing activities of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 82 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_82_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of interest expense on borrowings. [Refer: Interest expense; Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of interest expense on lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2022-03-24 -Paragraph 53 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_53_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of finance costs that the entity does not separately disclose in the same statement or note. [Refer: Finance costs] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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