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INVENTORIES (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of inventories
     
      Consolidated
  12/31/2023   12/31/2022
Finished goods 3,856,491   4,421,166
Work in progress 3,316,396   3,501,145
Raw materials 2,607,079   3,297,213
Storeroom supplies  1,225,963   1,174,244
Advances to suppliers 85,623   37,619
Provision for losses   (121,871)     (96,493)
  10,969,681   12,334,894
       
Classified:      
Current 9,557,578   11,289,229
Non-current (1) 1,412,103   1,045,665
  10,969,681   12,334,894

(1)Long-term iron ore inventories that will be used after the construction of the processing plant, which will produce pellet feed.
Schedule of changes in expected losses on inventories
       
        Consolidated
    12/31/2023   12/31/2022
Opening balance     (96,493)     (98,730)
Reversal/(Estimated losses)  of inventories with low turnover and obsolescence   (25,378)     3,621
Consolidation in the acquisition of companies        (1,384)
Closing balance   (121,871)     (96,493)