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Share Capital (Other employee long-term incentives) (Details) - shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Restricted share units ("RSU")    
Disclosure of classes of share capital [line items]    
Shares outstanding 1,968,591 1,666,825
Granted 724,984 851,453
Forfeiture (56,302) (201,954)
Settled (469,089) (347,733)
Shares outstanding 2,168,184 1,968,591
Deferred share units ("DSU")    
Disclosure of classes of share capital [line items]    
Shares outstanding 864,845 688,427
Granted 165,772 176,418
Forfeiture 0 0
Settled (119,189) 0
Shares outstanding 911,428 864,845
Performance share units ("PSU")    
Disclosure of classes of share capital [line items]    
Shares outstanding 1,234,018 1,082,153
Granted 490,034 475,623
Forfeiture (59,162) (75,892)
Settled (335,235) (247,866)
Shares outstanding 1,329,655 1,234,018