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Obligations for pension and similar liabilities (Details)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Actuarial assumption of expected rates of pension increases [member]      
IfrsStatementLineItems [Line Items]      
Nominal Discount Rate for Actuarial Obligation 10.70% 10.60% 8.70%
Rate Calculation of Interest Under Assets to the Next Year 10.70% 10.60% 8.70%
Estimated Long Term Inflation Rate 3.00% 3.00% 3.00%
Estimated Rate of Nominal Wage Increase 3.50% 3.50% 3.50%
Biometric General Mortality Table AT2000 AT2000 AT2000
Actuarial assumption of medical cost trend rates [member]      
IfrsStatementLineItems [Line Items]      
Nominal Discount Rate for Actuarial Obligation 10.50% 10.50% 8.70%
Rate Calculation of Interest Under Assets to the Next Year 10.50% 10.50% 8.70%
Estimated Long Term Inflation Rate 3.00% 3.00% 3.00%
Biometric General Mortality Table AT2000 AT2000 AT2000