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Employee benefits and private pension plan - Significant actuarial assumptions adopted (Detail)
Dec. 31, 2024
Dec. 31, 2023
Employee benefits and private pension plan    
Discount rate for the actuarial obligation at present value – Indemnification of FGTS 11.97% 9.41%
Discount rate for the actuarial obligation at present value – Bonus 11.82% 9.41%
Average discount rate for the actuarial obligation at present value – Medical services 11.07% 9.53%
Discount rate for the actuarial obligation at present value – Life insurance 11.82% 9.41%
Average projected salary growth rate – FGTS indemnity 6.80% 6.83%
Average projected bonus growth rate 7.33% 7.33%
Inflation rate (long term) 3.50% 3.50%
Medical services growth rate 7.64% 7.64%