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Share Capital - Share repurchases (Details) - CAD ($) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Share Capital |  |
Shares repurchased | 51,982 | 116,908
Share repurchase cost | $ 2,233 | $ 5,135
Average repurchase cost per share | $ 42.96 | $ 43.92
Liability for share purchase commitment | $ 150 | $ 350
Share capital |  |
Share Capital |  |
Share repurchase cost | 871 | 1,947
Liability for share purchase commitment | 60 | 136
Retained earnings |  |
Share Capital |  |
Share repurchase cost | 1,362 | 3,188
Liability for share purchase commitment | $ 90 | $ 214

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- Definition The decrease in equity resulting from the purchase of treasury shares. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_106_d&doctype=Standard -URIDate 2023-03-23 + Details
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