v3.26.1
Basis of Preparation and Presentation of the Consolidated Financial Statements - Schedule of Subsidiaries (Details)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Compania Siderurgica de Guadalajara, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.99% 99.99%
Arrendadora Simec, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Simec International, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Compania Siderurgica del Pacifico, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.99% 99.99%
Coordinadora de Servicios Siderúrgicos de Calidad, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Industrias del Acero y del Alambre, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.99% 99.99%
Procesadora Mexicali, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.99% 99.99%
Servicios Simec, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Sistemas de Transporte de Baja California, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Operadora de Servicios Siderurgicos de Tlaxcala, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Operadora de Metales, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Administradora de Servicios Siderurgicos de Tlaxcala, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
CSG Comercial, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.95% 99.95%
Operadora de Servicios de la Industria Siderurgica ICH, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Corporacion Aceros DM, S.A. de C.V. and subsidiaries [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [1] 100.00% 100.00%
Acero Transportes San, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [1] 100.00% 100.00%
Simec Acero, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Corporacion ASL, S. A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.99% 99.99%
Simec International 6, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Simec International 7, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.99% 99.99%
Simec International 9, S.A.P.I. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Corporativos G&DL, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Orge, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.99% 99.99%
Siderurgica del Occidente y Pacifico, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
RRLC, S.A.P.I. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.99% 99.99%
Grupo Chant, S.A.P.I. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 99.99% 99.99%
Aceros Especiales Simec Tlaxcala, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Gases Industriales de America, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
GSIM de Occidente S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Fundiciones de Acero Estructural, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Siderurgicos Noroeste, S.A. DE C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
Simec Siderurgico, S.A. de C.V. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned 100.00% 100.00%
SimRep Corporation and Subsidiaries [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [2],[3],[4] 99.41% 99.41%
Pacific Steel, Inc. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [2] 100.00% 100.00%
Pacific Steel Projects, Inc. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [2] 100.00% 100.00%
Simec Steel, Inc. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [2] 100.00% 100.00%
Simec USA, Corp. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [2] 100.00% 100.00%
Undershaft Investments, NV. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [5] 100.00% 100.00%
Companhia Siderurgica do Espirito Santo S.A. [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [6] 100.00% 100.00%
Companhia Siderurgica Vale do Paraíba Ltda [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [6] 100.00% 100.00%
GV do Brasil Industria e Comercio de Aco LTDA [Member]    
Subsidiaries established in Mexico:    
Percentage of equity owned [6] 99.99% 99.99%
[1] Companies located in San Luis Potosi. For purposes of this report constitute the “Grupo San”.
[2] Companies established in the United States of America, except a subsidiary of SimRep which is established in Canada.
[3] ICH owns 0.59% of the shares in this company at December 31, 2023.
[4] SimRep as an individual company has no significant operations or assets, except for its investment in Republic Steel. For purposes of this report, these companies are named “Republic”.
[5] Company established in Curaçao.
[6] Companies located in Brazil.