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Defined benefit plans (Detail 7) - Swiss defined benefit plans
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Defined Benefit Plans [Line Items]    
Discount rate 0.92% 1.48%
Rate of salary increase 2.80% 2.36%
Rate of pension increase 0.00% 0.00%
Rate of interest credit on retirement savings 2.02% 2.54%