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Acquisitions and divestitures (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
IfrsStatementLineItems [Line Items]        
Results on disposals of non-current assets $ 1,059   $ 1,059  
Equity results and other results in associates and joint ventures   $ (93)   $ (56)
PT Vale Indonesia Tbk [Member]        
IfrsStatementLineItems [Line Items]        
Results on disposals of non-current assets $ 1,059   $ 1,059  
Mineracao Rio Do Norte [Member]        
IfrsStatementLineItems [Line Items]        
Equity results and other results in associates and joint ventures   $ (93)   (93)
Companhia Sideruirgica Do Pecem [Member]        
IfrsStatementLineItems [Line Items]        
Equity results and other results in associates and joint ventures       $ 37