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Shareholders' equity (Details 3)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Shareholders Equity    
Minimum cost (*) R$7.55 R$7.55
Weighted average cost (*) R$27.33 R$27.46
Maximum cost (*) R$49.55 R$49.55
Share Price R$28.22 R$24.93