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Equity-accounted investees (Summary of Equity-accounted Investees) (Details) - CAD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of significant investments in associates [Line Items] |  |
Investment in equity-accounted investees | $ 3,218,456 | $ 3,173,185
Westinghouse Electric Company [Member] |  |
Disclosure of significant investments in associates [Line Items] |  |
Investment in equity-accounted investees | 2,931,746 | 2,899,379
Joint Venture Inkai LLP [Member] |  |
Disclosure of significant investments in associates [Line Items] |  |
Investment in equity-accounted investees | 286,710 | 273,806
Global Laser Enrichment LLC [Member] |  |
Disclosure of significant investments in associates [Line Items] |  |
Investment in equity-accounted investees | $ 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 investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2024-01-01 -Paragraph 24 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_24_a&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2024-01-01 -Paragraph B16 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B16&doctype=Appendix&subtype=B -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_e&doctype=Standard -URIDate 2024-03-27 + Details
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