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Exchangeable Securities - Schedule of Exchangeable Securities (Details) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | May 01, 2019
--- | --- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |  |
Total non-current credit facilities, long-term debt and lease liabilities | $ 3,236 | $ 2,934 |
7% Unsecured Subordinated Debentures Due May 1, 2039 |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Exchangeable debentures – due May 1, 2039 | $ 350 | $ 350 |
Interest | 7.00% | 7.00% | 7.00%
Exchangeable preferred shares | $ 400 | $ 400 |
Total non-current credit facilities, long-term debt and lease liabilities | 750 | 750 |
7% Unsecured Subordinated Debentures Due May 1, 2039 | Cost |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Exchangeable debentures – due May 1, 2039 | 350 | 344 |
Exchangeable preferred shares | 400 | 400 |
Total non-current credit facilities, long-term debt and lease liabilities | $ 750 | $ 744 |

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