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Material Accounting Policy Information - Deferred share units and Restricted share units (Details)
12 Months Ended
Dec. 31, 2023
shares
Deferred share units  
Significant accounting policies  
Number of trading days immediately preceding grant date for determining fair value 5 days
Restricted Share Units  
Significant accounting policies  
The number of trading days immediately preceding the date of the conversion award 5 days
The number of shares exchanged for each RSU 1
Time-based RSU  
Significant accounting policies  
Vesting period 3 years
Performance based RSU  
Significant accounting policies  
Vesting period 3 years
Target settlement range 0% to 150% 100.00%
Bottom | Performance based RSU  
Significant accounting policies  
Target settlement range 0% to 150% 0.00%
Top | Performance based RSU  
Significant accounting policies  
Target settlement range 0% to 150% 150.00%