v3.26.1
Company's Operations - Equity interests (Details)
3 Months Ended 6 Months Ended 9 Months Ended
Oct. 03, 2025
Mar. 31, 2026
Jun. 30, 2026
Sep. 30, 2025
Company's Operations [Line Items]        
Proportion of ownership interest in subsidiary     100.00% 100.00%
F&E Tecnologia do Brasil S.A. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Biofuel production, except alcohol  
Country     Brazil  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Fibria Celulose (USA) Inc. (Direct) | UNITED STATES        
Company's Operations [Line Items]        
Main activity     Business office  
Country     United States of America  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Fibria Terminal de Celulose de Santos SPE S.A. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Port operations  
Country     Brazil  
Proportion of ownership interest in subsidiary     100.00% 100.00%
FuturaGene Ltda. (Direct) | England        
Company's Operations [Line Items]        
Main activity     Biotechnology research and development  
Country     England  
Proportion of ownership interest in subsidiary     100.00% 100.00%
FuturaGene Delaware Inc. (Indirect) | UNITED STATES        
Company's Operations [Line Items]        
Main activity     Biotechnology research and development  
Country     United States of America  
Proportion of ownership interest in subsidiary     100.00% 100.00%
FuturaGene Israel Ltda. (Indirect) | ISRAEL        
Company's Operations [Line Items]        
Main activity     Biotechnology research and development  
Country     Israel  
Proportion of ownership interest in subsidiary     100.00% 100.00%
FuturaGene Inc. (Indirect) | UNITED STATES        
Company's Operations [Line Items]        
Main activity     Biotechnology research and development  
Country     United States of America  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Maxcel Empreendimentos e Participações S.A. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Holding  
Country     Brazil  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Itacel - Terminal de Celulose de Itaqui S.A. (Indirect) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Port operations  
Country     Brazil  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Mucuri Energética S.A. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Power generation and distribution  
Country     Brazil  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Paineiras Logística e Transportes Ltda. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Road freight transport  
Country     Brazil  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Portocel - Terminal Espec. Barra do Riacho S.A. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Port operations  
Country     Brazil  
Proportion of ownership interest in subsidiary     51.00% 51.00%
Projetos Especiais e Investimentos Ltda. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Commercialization of equipment and parts  
Country     Brazil  
Proportion of ownership interest in subsidiary     100.00% 100.00%
SFBC Participações Ltda. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Packaging production  
Country     Brazil  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Argentina S.A.U (Direct) | ARGENTINA        
Company's Operations [Line Items]        
Main activity     Commercialization of paper and computer materials  
Country     Argentina  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Austria GmbH. (Direct) | AUSTRIA        
Company's Operations [Line Items]        
Main activity     Business office  
Country     Austria  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Canada Inc. (Direct) | CANADA        
Company's Operations [Line Items]        
Main activity     Lignin research and development  
Country     Canada  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Ecuador S.A.S. (Direct) | ECUADOR        
Company's Operations [Line Items]        
Main activity     Business office  
Country     Ecuador  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano International Finance B.V. (Direct) | NETHERLANDS        
Company's Operations [Line Items]        
Main activity     Financial fundraising  
Country     Netherlands  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano International Holding B.V. (Direct) | NETHERLANDS        
Company's Operations [Line Items]        
Main activity     Holding  
Country     Netherlands  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano International Trade GmbH. (Direct) | AUSTRIA        
Company's Operations [Line Items]        
Main activity     Business office  
Country     Austria  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Packaging LLC (Indirect) | UNITED STATES        
Company's Operations [Line Items]        
Main activity     Production of coated and uncoated paperboard, used in the production of Liquid Packaging Board and Cupstock  
Country     United States of America  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Material Technology Development Ltd. (Direct) | CHINA        
Company's Operations [Line Items]        
Main activity     Biotechnology research and development  
Country     China  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Netherlands B.V. (Direct) | NETHERLANDS        
Company's Operations [Line Items]        
Main activity     Financial fundraising  
Country     Netherlands  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Operações Industriais e Florestais S.A. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Industrialization, commercialization and exporting of pulp  
Country     Brazil  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Pulp and Paper America Inc. (Direct) | UNITED STATES        
Company's Operations [Line Items]        
Main activity     Business office  
Country     United States of America  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Pulp and Paper Europe S.A. (Direct) | SWITZERLAND        
Company's Operations [Line Items]        
Main activity     Business office  
Country     Switzerland  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Shanghai Ltda. (Direct) | CHINA        
Company's Operations [Line Items]        
Main activity     Business office  
Country     China  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Shanghai Trading Ltda. (Direct) (1) | CHINA        
Company's Operations [Line Items]        
Main activity     Business office  
Country     China  
Proportion of ownership interest in subsidiary     100.00%
Suzano Singapura Pte. Ltda. (Direct) | SINGAPORE        
Company's Operations [Line Items]        
Main activity     Business office  
Country     Singapore  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Trading International KFT(Direct) | HUNGARY        
Company's Operations [Line Items]        
Main activity     Business office  
Country     Hungary  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Suzano Ventures LLC (Direct) | UNITED STATES        
Company's Operations [Line Items]        
Main activity     Corporate venture capital  
Country     United States of America  
Proportion of ownership interest in subsidiary     100.00% 100.00%
Veracel Celulose S.A. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Industrialization, commercialization and exporting of pulp  
Country     Brazil  
Proportion Of Ownership Interest in Equity Securities, accounting method, Joint operation     50.00% 50.00%
Allotrope Energy Ltd (Indirect) | England        
Company's Operations [Line Items]        
Main activity     Research and development of battery technology based on carbon derived from lignin biomass  
Country     England  
Proportion of ownership interest in associate   20.00% 19.72%  
Biomas Serviços Ambientais, Restauração e Carbono S.A. (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Restoration, conservation and preservation of forests  
Country     Brazil  
Proportion of ownership interest in associate     16.66% 16.66%
Muçununga Serviços Ambientais, Restauração e Carbono Ltda. (Indirect) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Restoration, conservation and preservation of forests  
Country     Brazil  
Proportion of ownership interest in associate     8.33% 8.33%
Ibema Companhia Brasileira de Papel (Direct) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Industrialization and commercialization of paperboard  
Country     Brazil  
Proportion of ownership interest in associate     49.90% 49.90%
Simplifyber, Inc. (Indirect) | UNITED STATES        
Company's Operations [Line Items]        
Main activity     Production of consumer goods through the transformation of cellulose-based liquids  
Country     United States of America  
Proportion of ownership interest in associate     15.52% 14.20%
Spinnova Plc. (Direct) (“Spinnova”) | FINLAND        
Company's Operations [Line Items]        
Main activity     Research of sustainable raw materials for the textile industry  
Country     Finland  
Proportion of ownership interest in associate     18.75% 18.76%
Woodspin Oy (Direct/Indirect) (“Woodspin”) (2) | FINLAND        
Company's Operations [Line Items]        
Main activity     Development and production of cellulose-based fibers, yarns and textile filaments  
Country     Finland  
Proportion of ownership interest in associate 100.00%   18.75% 18.76%
Spinnova Refining Oy (Indirect) (2) | FINLAND        
Company's Operations [Line Items]        
Main activity     Industrialization and commercialization of cellulose, microfiber cellulose and paper  
Country     Finland  
Proportion of ownership interest in associate     18.75% 18.76%
Bem Agro Integração e Desenvolvimento S.A. (Indirect) | BRAZIL        
Company's Operations [Line Items]        
Main activity     Software solutions based on artificial intelligence and computer vision for agribusiness  
Country     Brazil  
Proportion of ownership interest in associate     4.58% 5.82%
Celluforce Inc. (Direct) | CANADA        
Company's Operations [Line Items]        
Main activity     Nanocrystalline pulp research and development  
Country     Canada  
Proportion Of Ownership Interest in Equity Securities, accounting method, Joint operation     8.28% 8.28%
Lenzing Aktiengesellschaft (Indirect) | AUSTRIA        
Company's Operations [Line Items]        
Main activity     Production of wood-based cellulose fibers  
Country     Austria  
Proportion of ownership interest in associate     15.00% 15.00%
Nfinite Nanotechnology Inc. (Indirect) | CANADA        
Company's Operations [Line Items]        
Main activity     Research and development of smart nanocoatings  
Country     Canada  
Proportion Of Ownership Interest in Equity Securities, accounting method, Joint operation     5.40% 4.90%