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Share capital - Summary of Outstanding Common Shares (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Number of shares |  |
Shares issued under employee stock option plan (in shares) | 0 | 306,139
Unclaimed shares (in shares) | (938,742) | (11,408)
Shares issued under employee stock option plan |  | $ 18
Common shares |  |
Number of shares |  |
Stated capital beginning of period | $ 20,859 |
Stated capital end of period | $ 20,860 | $ 20,859
Issued capital | Common shares |  |
Number of shares |  |
Number of shares beginning of period (in shares) | 912,274,545 | 911,982,866
Shares issued for deferred plan (in shares) | 8,558 | 843
Shares issued under employee stock option plan (in shares) | 0 | 306,139
Unclaimed shares (in shares) | 0 | (15,303)
Number of shares end of period (in shares) | 912,283,103 | 912,274,545
Stated capital beginning of period | $ 20,859 | $ 20,840
Shares issued under deferred share plan | 1 | 0
Shares issued under employee stock option plan | 0 | 19
Unclaimed shares | 0 | 0
Stated capital end of period | $ 20,860 | $ 20,859

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- Definition The increase (decrease) in equity resulting from the exercise of options. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The nominal value of capital issued. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 78 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_e&doctype=Standard -URIDate 2024-03-27 + Details
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