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Employees - Summary of Assumptions, Weighted by Liabilities for Valuation of Defined Benefit Plans (Details)
Dec. 31, 2023
Dec. 31, 2022
Pension plans    
Disclosure of defined benefit plans [line items]    
Discount rate 4.40% 4.60%
Inflation 2.80% 2.80%
Rate of increase in salaries 3.40% 3.30%
Rate of increase for pensions in payment (where provided) 2.60% 2.40%
Rate of increase for pensions in deferment (where provided) 2.80% 2.60%
Other post- employment benefit plans    
Disclosure of defined benefit plans [line items]    
Discount rate 5.90% 5.90%
Rate of increase in salaries 2.90% 3.00%
Long-term medical cost inflation 5.50% 5.10%