v3.26.1
Shareholders equity - Share capital (Details) - BRL (R$)
R$ / shares in Units, R$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2026
Jun. 30, 2025
Dec. 31, 2025
Disclosure of classes of share capital [line items]      
Share capital R$ 24,235,546   R$ 24,235,546
% 100.00% 100.00%  
Common Stock Price R$ 51.90   R$ 51.45
Treasury (Note 27.2)      
Disclosure of classes of share capital [line items]      
% 2.22% 2.23%  
Treasury (Note 27.2) | Quantity      
Disclosure of classes of share capital [line items]      
Quantity 28,020,765   28,208,827
Share Capital      
Disclosure of classes of share capital [line items]      
Share capital R$ 24,269,281    
Share issue related cost R$ 33,735    
Share Capital | Quantity      
Disclosure of classes of share capital [line items]      
Quantity 1,264,117,615   1,264,117,615
Suzano Holding S.A.      
Disclosure of classes of share capital [line items]      
% 29.08% 29.08%  
Suzano Holding S.A. | Quantity      
Disclosure of classes of share capital [line items]      
Quantity 367,612,329   367,612,329
Controller      
Disclosure of classes of share capital [line items]      
% 15.52% 15.51%  
Controller | Quantity      
Disclosure of classes of share capital [line items]      
Quantity 196,144,533   196,065,636
Related persons      
Disclosure of classes of share capital [line items]      
% 2.10% 2.54%  
Related persons | Quantity      
Disclosure of classes of share capital [line items]      
Quantity 26,568,442   32,157,608
Alden Fundo de Investimento em Ações      
Disclosure of classes of share capital [line items]      
% 2.15% 2.15%  
Alden Fundo de Investimento em Ações | Quantity      
Disclosure of classes of share capital [line items]      
Quantity 27,154,744   27,154,744
Controlling Shareholders      
Disclosure of classes of share capital [line items]      
% 48.85% 49.28% 49.28%
Controlling Shareholders | Quantity      
Disclosure of classes of share capital [line items]      
Quantity 617,480,048   622,990,317
Other shareholders      
Disclosure of classes of share capital [line items]      
% 48.94% 48.49%  
Other shareholders | Quantity      
Disclosure of classes of share capital [line items]      
Quantity 618,616,802   612,918,471