v3.26.1
Property, plant and equipment (Tables)
 12 Months Ended
Dec. 31, 2025
Notes and other explanatory information [abstract]  
Schedule of detailed information about property, plant and equipment
             
              2025
  Lands, dam and buildings Machinery, equipment, and facilities Assets and projects under construction Asset retirement obligations

Mining projects

(i)

 Others Total
 Balance at the beginning of the year   898,162   707,792   313,712   94,345   59,552   23,945   2,097,508
 Cost   1,673,095   2,487,702   381,216   188,759   208,627   34,817   4,974,216
 Accumulated depreciation and impairment   (774,933)   (1,779,910)   (67,504)   (94,414)   (149,075)   (10,872)   (2,876,708)
 Balance at the beginning of the year   898,162   707,792   313,712   94,345   59,552   23,945   2,097,508
 Additions   -                      2   351,857   8,304   -   10   360,173
 Disposals and write-offs   (46)   (2,337)   (851)   -   -   (82)   (3,316)
 Depreciation   (72,746)   (110,002)   -   (8,785)   (1,020)   (722)   (193,275)
 Impairment reversal (loss) of long-lived assets - note 31   2,761   (1,415)   (3,963)   9,331   1,143   6   7,863
 Foreign exchange effects   75,273   60,144   11,260   10,522   710   1,832   159,741
 Remeasurement   -   -   -   3,093   -   -   3,093
 Effect of new subsidiary acquisition   571   55   -   -   -   228   854
 Transfers                  156,214             52,087   (202,601)   -   (4,707)             38   1,031
 Balance at the end of year   1,060,189   706,326   469,414   116,810   55,678   25,255   2,433,672
 Cost   1,942,174   2,586,948   542,522   213,674   126,979   37,525   5,449,822
 Accumulated depreciation and impairment   (881,985)   (1,880,622)   (73,108)   (96,864)   (71,301)   (12,270)   (3,016,150)
 Balance at the end of year   1,060,189   706,326   469,414   116,810   55,678   25,255   2,433,672
 Average annual depreciation rates %   4   11   -  UoP  UoP   8  
              2024
  Lands, dam and buildings Machinery, equipment, and facilities Assets and projects under construction Asset retirement obligations

Mining projects

(i)

 Others Total
 Balance at the beginning of the year   914,366   848,420   445,440   80,361   121,760   28,267   2,438,614
 Cost   1,710,083   2,896,565   512,925   219,449   215,913   44,601   5,599,536
 Accumulated depreciation and impairment   (795,717)   (2,048,145)   (67,485)   (139,088)   (94,153)   (16,334)   (3,160,922)
 Balance at the beginning of the year   914,366   848,420   445,440   80,361   121,760   28,267   2,438,614
 Additions   -   667   276,839   45,891   -   85   323,482
 Disposals and write-offs   (23)   (3,408)   (8,984)   -   (4,111)   (53)   (16,579)
 Depreciation   (104,929)   (113,679)   -   (5,221)   (834)   (1,201)   (225,864)
 Impairment reversal (loss) of long-lived assets - note 31   12,147   964   (7,149)   1,495   (50,197)   336   (42,404)
 Divestments   (2,990)   (4,265)   (290)   (1,377)   (4,150)   (381)   (13,453)
 Foreign exchange effects   (163,559)   (133,501)   (34,196)   (16,857)   (2,946)   (4,369)   (355,428)
 Remeasurement   -   -   -   (9,947)   -   -   (9,947)
 Transfers   243,150   112,594   (357,948)   -   30   1,261   (913)
Balance at the end of year   898,162   707,792   313,712   94,345   59,552   23,945   2,097,508
 Cost   1,673,095   2,487,702   381,216   188,759   208,627   34,817   4,974,216
 Accumulated depreciation and impairment   (774,933)   (1,779,910)   (67,504)   (94,414)  (149,075)   (10,872)   (2,876,708)
 Balance at the end of year   898,162   707,792   313,712   94,345   59,552   23,945   2,097,508
 Average annual depreciation rates %   4   9   -  UoP  UoP    

(i) Only mining projects of the operating unit Atacocha are being depreciated under the UoP method.