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Company's Operations - Equity interests (Details) - shares | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2025 | Jun. 30, 2025 | Dec. 31, 2024
Company's Operations [Line Items] |  |  |
% |  | 100.00% | 100.00%
Stock canceled During Period, Shares |  |  | (60,000,000,000)
F&E Tecnologia do Brasil S.A. (Direct) | BRAZIL |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Biofuel production, except alcohol |
Country |  | Brazil |
% | 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 |
% | 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 |
% | 100.00% | 100.00% |
FuturaGene Ltda. | England |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Biotechnology research and development |
Country |  | England |
% | 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 |
% | 100.00% | 100.00% |
FuturaGene Israel Ltda. (Indirect) | ISRAEL |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Biotechnology research and development |
Country |  | Israel |
% | 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 |
% | 100.00% | 100.00% |
Maxcel Empreendimentos e Participações S.A. (Direct) | BRAZIL |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Holding |
Country |  | Brazil |
% | 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 |
% | 100.00% | 100.00% |
Mucuri Energética S.A. (Direct) | BRAZIL |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Power generation and distribution |
Country |  | Brazil |
% | 100.00% | 100.00% |
Paineiras Logística e Transportes Ltda. (Direct) | BRAZIL |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Road freight transport |
Country |  | Brazil |
% | 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 |
% | 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 |
% | 100.00% | 100.00% |
SFBC Participações Ltda. (Direct) | BRAZIL |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Packaging production |
Country |  | Brazil |
% | 100.00% | 100.00% |
Stenfar S.A. Indl. Coml. Imp. Y. Exp. (Direct) | ARGENTINA |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Commercialization of paper and computer materials |
Country |  | Argentina |
% | 100.00% | 100.00% |
Suzano Austria GmbH. (Direct) | AUSTRIA |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Business office |
Country |  | Austria |
% | 100.00% | 100.00% |
Suzano Canada Inc. (Direct) | CANADA |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Lignin research and development |
Country |  | Canada |
% | 100.00% | 100.00% |
Suzano Ecuador S.A.S. (Direct) | ECUADOR |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Business office |
Country |  | Ecuador |
% | 100.00% | 100.00% |
Suzano Finland Oy (Direct) | FINLAND |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Industrialization and commercialization of cellulose, microfiber cellulose and paper |
Country |  | Finland |
% | 100.00% | 100.00% |
Suzano International Finance B.V (Direct) | NETHERLANDS |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Financial fundraising |
Country |  | Netherlands |
% | 100.00% | 100.00% |
Suzano International Holding B.V. (Direct) | NETHERLANDS |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Holding |
Country |  | Netherlands |
% | 100.00% | 100.00% |
Suzano International Trade GmbH. (Direct) | AUSTRIA |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Business office |
Country |  | Austria |
% | 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 |
% | 100.00% | 100.00% |
Suzano Material Technology Development Ltd. (Direct) | CHINA |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Biotechnology research and development |
Country |  | China |
% | 100.00% | 100.00% |
Suzano Netherlands B.V. (Direct) | NETHERLANDS |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Financial fundraising |
Country |  | Netherlands |
% | 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 |
% | 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 |
% | 100.00% | 100.00% |
Suzano Pulp and Paper Europe S.A. (Direct) | SWITZERLAND |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Business office |
Country |  | Switzerland |
% | 100.00% | 100.00% |
Suzano Shanghai Ltda. (Direct) | CHINA |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Business office |
Country |  | China |
% | 100.00% | 100.00% |
Suzano Shanghai Trading Ltda. (Direct) | CHINA |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Business office |
Country |  | China |
% | 100.00% | 100.00% |
Suzano Singapura Pte. Ltda. (Direct) | SINGAPORE |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Business office |
Country |  | Singapore |
% | 100.00% | 100.00% |
Suzano Trading International KFT(Direct) | HUNGARY |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Business office |
Country |  | Hungary |
% | 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 |
% | 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% |
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% |
Ensyn Corporation (Direct) | UNITED STATES |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Biofuel research and development |
Country |  | United States of America |
Proportion of ownership interest in associate | 24.80% | 24.80% |
F&E Technologies LLC (Direct/Indirect) | UNITED STATES |  |  |
Company's Operations [Line Items] |  |  |
Main activity |  | Biofuel production, except alcohol |
Country |  | United States of America |
Proportion of ownership interest in associate | 50.00% | 50.00% |
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 | 13.91% | 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 | 18.77% | 18.76% |
Woodspin Oy (Direct/Indirect) (“Woodspin”) | 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 | 50.00% | 50.00% |
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 | 5.82% | 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 Aktiengesellschft [Member] | 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 | 5.00% | 4.90% |
Muçununga Serviços Ambientais, Restauração e Carbono Ltda. | BRAZIL |  |  |
Company's Operations [Line Items] |  |  |
Proportion of ownership interest in associate |  | 16.66% |

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