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Accounts receivable (Tables)
 6 Months Ended
Jun. 30, 2023
Notes and other explanatory information [abstract]  
Schedule of accounts receivable
     
       
  Notes June 30, 2023 December 31, 2022
Receivables from contracts with customers      
Related parties 29 118 211
Third parties      
Iron Solutions   2,146 3,132
Energy Transition Metals   731 984
Other   16 35
Accounts receivable   3,011 4,362
Expected credit loss   (44) (43)
Accounts receivable, net   2,967 4,319
Schedule of sensitivity of the company’s risk on final settlement
       
  June 30, 2023
  Thousand metric tons Provisional price (US$/ton) Variation

Effect on Revenue

(US$ million)

Iron ore 22,564 102 +/- 10% +/- 230
Copper 77 7,811 +/- 10% +/- 60