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Acquisitions and divestitures - (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]      
Equity results and other results in associates and joint ventures, net $ (56) $ (2) $ (75)
Other financial items   65 1,912
Total recycling from OCI   215 1,912
Impairment reversal (impairment) of non-current assets gross   1,111 (211)
Equity results and other results in associates and joint ventures, gross   150  
Other financial items, net   3,137 2,336
Equity results and other results in associates and joint ventures, net   150  
Total recycling from OCI, net   3,287 2,336
Impairment reversal (impairment) of non-current assets, net   522 (3,493)
Mineracao Rio Do Norte [Member]      
IfrsStatementLineItems [Line Items]      
Equity results and other results in associates and joint ventures, net (87)    
Companhia Siderurgica Do Pecem [Member]      
IfrsStatementLineItems [Line Items]      
Equity results and other results in associates and joint ventures, net $ 31 (135)  
Midwestern System [Member]      
IfrsStatementLineItems [Line Items]      
Other financial items   37  
Total recycling from OCI   37  
Impairment reversal (impairment) of non-current assets gross   1,121 (78)
California Steel Industries [Member]      
IfrsStatementLineItems [Line Items]      
Equity results and other results in associates and joint ventures, net   142  
Total recycling from OCI   150  
Equity results and other results in associates and joint ventures, gross   150  
Manganese [Member]      
IfrsStatementLineItems [Line Items]      
Impairment reversal (impairment) of non-current assets gross   (10) (35)
Other [Member]      
IfrsStatementLineItems [Line Items]      
Equity results and other results in associates and joint ventures, net   (9) (75)
Other financial items   28 9
Total recycling from OCI   28 9
Discontinued operations [member]      
IfrsStatementLineItems [Line Items]      
Other financial items   3,072 424
Total recycling from OCI   3,072 424
Impairment reversal (impairment) of non-current assets gross   $ (589) (3,282)
Vale Nouvelle Caldonie S A S [Member]      
IfrsStatementLineItems [Line Items]      
Other financial items     1,132
Total recycling from OCI     1,132
Impairment reversal (impairment) of non-current assets gross     (98)
Vale Shipping [Member]      
IfrsStatementLineItems [Line Items]      
Other financial items     771
Total recycling from OCI     $ 771