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Asset Impairment Charges (Reversals) - Detailed Information About Property, Plant, and Equipment (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Asset impairment charges (reversals) | $ 46 | $ (48) | $ 9
Corporate | Kaybob Cogeneration Project |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Asset impairment charges (reversals) | 0 | 0 | (2)
Hydro |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Asset impairment charges (reversals) | 0 | (10) | 21
Wind and Solar |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Asset impairment charges (reversals) | 0 | (4) | 43
Changes in decommissioning and restoration provisions on retired assets(1) |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Asset impairment charges (reversals) | 24 | (34) | (53)
Project development costs |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Asset impairment charges (reversals) | $ 22 | $ 0 | $ 0

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of impairment loss or reversal of impairment loss recognised in profit or loss. [Refer: Impairment loss recognised in profit or loss; Reversal of impairment loss recognised in profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 99 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_99&doctype=Standard -URIDate 2024-03-27 + Details
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