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Accounts receivable (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of accounts receivable
     
  Notes December 31, 2023 December 31, 2022
Receivables from contracts with customers      
Third parties      
Iron Ore Solutions   3,406 3,132
Energy Transition Metals   743 984
Other   3 35
Related parties 31 89 211
Accounts receivable   4,241 4,362
Expected credit loss   (44) (43)
Accounts receivable, net   4,197 4,319
Schedule of sensitivity of the company's risk on final settlement
       
  December 31, 2023
  Thousand metric tons Provisional price (US$/ton) Variation

Effect on Revenue

(US$ million)

Iron ore 29,594 139 +/- 10% +/- 412
Copper 95 8,026 +/- 10% +/- 76