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SHARE CAPITAL - Share repurchases (Details) - CAD ($) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Share Capital |  |
Shares repurchased | 83,959 | 7,527
Share repurchase cost | $ 2,304 | $ 307
Average repurchase cost per share | $ 27.45 | $ 40.83
Liability for share purchase commitment | $ 230 |
Issued capital [member] |  |
Share Capital |  |
Share repurchase cost | 1,382 | $ 124
Liability for share purchase commitment | 120 |
Retained earnings |  |
Share Capital |  |
Share repurchase cost | 922 | $ 183
Liability for share purchase commitment | $ 110 |

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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 2021-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_106_d&doctype=Standard -URIDate 2021-03-24 + Details
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