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Basis of preparation and presentation of the consolidated financial statements (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure of basis of preparation and presentation of the consolidated financial statements [Abstract] |
Schedule of Subsidiaries | As of December 31, 2019, and 2018, the subsidiaries of Grupo Simec, S.A.B. de C.V. included in the consolidation are the following:
| Percentage of equity owned
Subsidiaries established in Mexico: | 2 0 1 9 |  | 2 0 1 8
Compañia Siderurgica de Guadalajara, S.A. de C.V. | 99.99% |  | 99.99%
Arrendadora Simec, S.A. de C.V. | 100.00% |  | 100.00%
Simec International, S.A. de C.V. | 100.00% |  | 100.00%
Compañia Siderurgica del Pacifico, S.A. de C.V. | 99.99% |  | 99.99%
Coordinadora de Servicios Siderurgicos de Calidad, S.A. de C.V. (8) | 100.00% |  | 100.00%
Industrias del Acero y del Alambre, S.A. de C.V. | 99.99% |  | 99.99%
Procesadora Mexicali, S.A. de C.V. | 99.99% |  | 99.99%
Servicios Simec, S.A. de C.V. | 100.00% |  | 100.00%
Sistemas de Transporte de Baja California, S.A. de C.V. | 100.00% |  | 100.00%
Operadora de Servicios Siderurgicos de Tlaxcala, S.A. de C.V. (8) | 100.00% |  | 100.00%
Operadora de Metales, S.A. de C.V. (8) | 100.00% |  | 100.00%
Administradora de Servicios Siderurgicos de Tlaxcala, S.A. de C.V. (8) | 100.00% |  | 100.00%
CSG Comercial, S.A. de C.V. | 99.95% |  | 99.95%
Operadora de Servicios de la Industria Siderurgica ICH, S.A. de C.V. | 100.00% |  | 100.00%
Corporacion Aceros DM, S.A. de C.V. and subsidiaries (1) | 100.00% |  | 100.00%
Acero Transportes San, S.A. de C.V. (1) | 100.00% |  | 100.00%
Simec Acero, S.A. de C.V. (8) | 100.00% |  | 100.00%
Corporacion ASL, S. A. de C.V. | 99.99% |  | 99.99%
Simec International 6, S.A. de C.V. (8) | 100.00% |  | 100.00%
Simec International 7, S.A. de C.V. | 99.99% |  | 99.99%
Simec International 9, S.A.P.I. de C.V. | 100.00% |  | 100.00%
Corporativos G&DL, S.A. de C.V. (8) | 100.00% |  | 100.00%
Orge, S.A. de C.V. | 99.99% |  | 99.99%
Siderurgica del Occidente y Pacifico, S.A. de C.V. | 100.00% |  | 100.00%
RRLC, S.A.P.I. de C.V. (8) | 95.10% |  | 95.10%
Grupo Chant, S.A.P.I. de C.V. (8) | 97.61% |  | 97.61%
Aceros Especiales Simec Tlaxcala, S.A. de C.V. | 100.00% |  | 100.00%
Recursos Humanos de la Industria Siderurgica de Tlaxcala, S.A. de C.V. | 100.00% |  | 100.00%
GSIM de Occidente S.A. de C.V. | 100.00% |  | 100.00%
Fundiciones de Acero Estructural, S.A. de C.V. | 100.00% |  | 100.00%
Siderúrgicos Noroeste, S.A. de C.V. (9) | 100.00% |  | 100.00%
Simec Siderúrgico, S.A. de C.V. (10) | 100.00% |  | 100.00%
Subsidiaries established in foreign countries: |  |  |
SimRep Corporation and Subsidiaries (3) (4) (5) | 99.41% |  | 50.22%
Pacific Steel, Inc. (4) | 100.00% |  | 100.00%
Pacific Steel Projects, Inc. (4) | 100.00% |  | 100.00%
Simec Steel, Inc. (4) | 100.00% |  | 100.00%
Simec USA, Corp. (4) | 100.00% |  | 100.00%
Undershaft Investments, NV. (6) | 100.00% |  | 100.00%
GV do Brasil Industria e Comercio de Aço LTDA (7) | 100.00% |  | 100.00%
Companhia Siderurgica do Espiritu Santo S.A. (10) (7) | 100.00% |  | 100.00%
GS Steel B.V. (2) | Liquidated |  | 100.00%
| (1) | Companies located in San Luis Potosi. For purposes of this report constitute the “Grupo San”.
| (2) | Company established in Netherlands.
| (3) | ICH owns 0.59% of the shares in this company at December 31, 2019.
| (4) | Companies established in the United States of America, except a subsidiary of SimRep which is established in Canada.
| (5) | 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”.
| (6) | Company established in Curaçao.
| (7) | Company established in Brazil.
| (8) | Companies that have lost the entire capital stock, except Operadora de Metales, S.A. de C.V. which only have lost 2/3 of their capital stock.
| (9) | Company incorporated in 2017.
| (10) | Company incorporated in 2018.
Schedule of Relevant Exchange Rates Used | The conversion differences are carried directly to the consolidated statements of comprehensive income as other comprehensive income under the caption translation effects of foreign subsidiaries. Relevant exchange rates used in the conversion of the financial statements of foreign subsidiaries were as follows (Mexican pesos per one U.S. dollar):
| Current exchange rate as of December 31, 2019 | 18.87
| Current exchange rate as of December 31, 2018 | 19.66
| Average exchange rate for the year ended December 31, 2019 (*) | 19.26
| Average exchange rate for the year ended December 31, 2018 (*) | 19.23
| Current exchange rate as of May, 27 of 2020 | 22.56
| (*) | Average exchange rate used to translate revenues, costs and expenses of the companies mentioned above.
Schedule of Estimated Useful Lives of Assets | The initial estimated useful lives of the Company’s main assets are as follows:
| Years
Buildings | 10 to 65
Machinery and equipment | 5 to 40
Transportation equipment | 4
Furniture, mixtures and computer equipment | 3 to 10

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