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Acquisitions and divestitures - Vale Moambique (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Other financial items $ 65    
Total recycling from OCI 215 $ 1,912 $ 135
Impairment reversal (impairment) of non-current assets gross 1,111 (211) (1,083)
Equity results and other results in associates and joint ventures 150   135
Equity results and other results in associates and joint ventures, Gross (2) (75) 161
Equity results and other results in associates and joint ventures 150   135
Total recycling from OCI   2,336 135
Impairment reversal (impairment) of non-current assets, Net 522 (3,493) (2,018)
Equity results and other results in associates and joint ventures, Net     161
Midwestern System [Member]      
IfrsStatementLineItems [Line Items]      
Other financial items 37 1,912  
Total recycling from OCI 37    
Impairment reversal (impairment) of non-current assets gross 1,121 (78)  
Total recycling from OCI 3,287    
California Steel Industries [Member]      
IfrsStatementLineItems [Line Items]      
Total recycling from OCI 150    
Equity results and other results in associates and joint ventures 150    
Equity results and other results in associates and joint ventures, Gross 142    
Other financial items, net 3,137 2,336  
Companhia Siderurgica Do Pecem [Member]      
IfrsStatementLineItems [Line Items]      
Equity results and other results in associates and joint ventures, Gross [1] (135)    
Manganese [Member]      
IfrsStatementLineItems [Line Items]      
Impairment reversal (impairment) of non-current assets gross (10) (35) (76)
Other [Member]      
IfrsStatementLineItems [Line Items]      
Other financial items 28 9  
Total recycling from OCI 28 9 19
Equity results and other results in associates and joint ventures     19
Equity results and other results in associates and joint ventures, Gross (9) (75) (11)
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) (935)
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  
Vale Nouvelle Caledonie S A S [Member]      
IfrsStatementLineItems [Line Items]      
Impairment reversal (impairment) of non-current assets gross   (882)  
V L I [Member]      
IfrsStatementLineItems [Line Items]      
Equity results and other results in associates and joint ventures, Gross     172
Biopalma [Member]      
IfrsStatementLineItems [Line Items]      
Impairment reversal (impairment) of non-current assets gross   $ (125)  
Longyu [Member]      
IfrsStatementLineItems [Line Items]      
Total recycling from OCI     116
Equity results and other results in associates and joint ventures     $ 116
[1] Includes impairment of the investment in the amount of US$111 and a provision for accounts receivable with CSP in the amount of US$24.