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Pension Benefits - Actuarial assumptions (Details)
Dec. 31, 2024
Dec. 31, 2023
Minimum    
Pension Benefits    
Discount rate 6.09% 6.73%
Rate of increase in compensation level 7.00% 7.50%
Maximum    
Pension Benefits    
Discount rate 12.00% 12.80%
Rate of increase in compensation level 10.00% 14.50%