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Pension Benefits - Actuarial assumptions (Details)
Dec. 31, 2023
Dec. 31, 2022
Minimum    
Pension Benefits    
Discount rate 6.73% 5.13%
Rate of increase in compensation level 7.50% 7.50%
Maximum    
Pension Benefits    
Discount rate 12.80% 20.00%
Rate of increase in compensation level 14.50% 20.00%