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SHARE CAPITAL - Movements in Treasury Shares (Details) - shares
shares in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Movement in Treasury Shares [Roll Forward]      
Beginning balance 115.7 121.6 128.2
Acquisition of common shares 11.3 2.7 3.4
Distribution of common shares (7.1) (8.4) (9.3)
Common shares distributed to meet ESPP obligation (0.4) (0.2) (0.7)
Ending balance 119.5 115.7 121.6