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Post-employment benefits for employees (Details 4)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pension plans      
Disclosure of defined benefit plans [line items]      
Discount rate 3.00% 0.90% 0.60%
Expected rate of pension increase 0.40% 0.50% 0.30%
Expected rate of salary increase 2.90% 2.70% 2.70%
Interest on savings account 2.20% 0.50% 0.10%
Current life expectancy for a 65-year-old male 22 years 22 years 22 years
Current life expectancy for a 65-year-old female 24 years 24 years 24 years
Other post-employment benefit plans      
Disclosure of defined benefit plans [line items]      
Discount rate 6.30% 3.30% 2.90%
Current life expectancy for a 65-year-old male 21 years 21 years 21 years
Current life expectancy for a 65-year-old female 23 years 23 years 23 years