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Intangible assets (Tables)
 12 Months Ended
Dec. 31, 2024
Notes and other explanatory information [abstract]  
Schedule of reconciliation of changes in intangible assets
       
        2024
  Goodwill (i) Rights to use natural resources Other   Total
 Balance at the beginning of the year        
 Cost   630,787   1,859,147   53,865   2,543,799
 Accumulated amortization and impairment   (323,675)   (1,279,596)   (31,249)   (1,634,520)
 Balance at the beginning of the year   307,112   579,551   22,616   909,279
 Additions   -   -   5,748   5,748
 Disposals and write-offs   -   (226)   (116)   (342)
 Amortization   -   (65,710)   (2,435)   (68,145)
 Impairment reversal of long-lived assets – note 31   -   9,534   -   9,534
 Foreign exchange effects   (1,715)   (15,433)   (5,152)   (22,300)
 Transfers   -   (225)   1,138   913
 Balance at the end of the year   305,397   507,491   21,799   834,687
 Cost   316,087 1,810,609   49,896 2,176,592
 Accumulated amortization and impairment   (10,690) (1,303,118)   (28,097) (1,341,905)
 Balance at the end of the year   305,397   507,491   21,799   834,687
         
 Average annual depreciation rates %   -  UoP   5  

 

        2023
 

Goodwill (i)

 Rights to use natural resources Other   Total
 Balance at the beginning of the year        
 Cost   611,909   1,855,014   65,246   2,532,169
 Accumulated amortization and impairment   (267,342)   (1,207,596)   (40,304)   (1,515,242)
 Balance at the beginning of the year   344,567   647,418   24,942   1,016,927
 Additions   -   -   3,087   3,087
 Amortization   -   (71,488)   (3,041)   (74,529)
 Impairment (loss) reversal of long-lived assets – note 31   (42,660)   -   (27)   (42,687)
 Foreign exchange effects   346   3,489   1,727   5,562
 Transfers   4,859   132   (4,072)   919
 Balance at the end of the year   307,112   579,551   22,616   909,279
 Cost   630,787   1,859,147   53,865   2,543,799
 Accumulated amortization and impairment   (323,675)   (1,279,596)   (31,249)   (1,634,520)
 Balance at the end of the year   307,112   579,551   22,616   909,279
         
 Average annual depreciation rates %   -  UoP   5  

(i) As of December 31, 2024, the Company’s recognized goodwill balances were as follows: USD 95,087 (2023 - USD 95,717) allocated to Cajamarquilla CGU, USD 3,887 (2023 - USD 4,972) allocated to Juiz de Fora, and USD 206,423 (2023 - USD 206,423) allocated to the Mining Peru group of CGUs. In 2024, the recoverability of goodwill was tested, as explained in note 31.