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Exchangeable Securities - Schedule of Exchangeable Securities (Details) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | May 01, 2019
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Disclosure of detailed information about borrowings [line items] |  |  |
Total exchangeable securities | $ 2,934 | $ 3,475 |
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 exchangeable securities | 750 | 750 |
Cost | 7% Unsecured Subordinated Debentures Due May 1, 2039 |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Exchangeable debentures – due May 1, 2039 | 344 | 339 |
Exchangeable preferred shares | 400 | 400 |
Total exchangeable securities | $ 744 | $ 739 |

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- Definition The amount of notes and debentures issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
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