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Financial and capital risk management - Effects of derivatives on statement of financial position and Net exposure (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Assets $ 342 $ 111
Liabilities 90 243
Not Designated As Hedging Instruments [Member]    
IfrsStatementLineItems [Line Items]    
Assets 538 131
Liabilities 276 835
Derivative Financial Assets Liabilities 262 (704)
Not Designated As Hedging Instruments [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 425 82
Liabilities 214 806
Derivative Financial Assets Liabilities 211 (724)
Not Designated As Hedging Instruments [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 113 36
Liabilities 57 29
Derivative Financial Assets Liabilities 56 7
Not Designated As Hedging Instruments [Member] | Cdi Tjlp Versus Usd Fixed And Floating Rate Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 11  
Liabilities 144 591
Derivative Financial Assets Liabilities (133) (591)
Not Designated As Hedging Instruments [Member] | Ipca Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets   41
Liabilities 63 119
Derivative Financial Assets Liabilities (63) (78)
Not Designated As Hedging Instruments [Member] | Dollar Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 407 29
Liabilities 7 95
Derivative Financial Assets Liabilities 400 (66)
Not Designated As Hedging Instruments [Member] | Libor Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 7 12
Liabilities   1
Derivative Financial Assets Liabilities [1] 7 11
Not Designated As Hedging Instruments [Member] | Bunker Oil Gasoil And Brent [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 78 8
Liabilities 56 2
Derivative Financial Assets Liabilities 22 6
Not Designated As Hedging Instruments [Member] | Energy Transition Materials [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 35 28
Liabilities 1 27
Derivative Financial Assets Liabilities 34 1
Not Designated As Hedging Instruments [Member] | Other Options [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets   13
Liabilities 5  
Derivative Financial Assets Liabilities $ (5) $ 13
[1] In March 2021, the UK Financial Conduct Authority (“FCA”), the financial regulator in the United Kingdom, announced the discontinuation of the LIBOR rate for all terms in pounds, euros, Swiss francs, yen and for terms of one week and two months in dollars at the end of December 2021 and the other terms at the end of June 2023. Vale is in negotiations with some financial institutions to replace the reference interest rate of its financial contracts from LIBOR to Secured Overnight Financing Rate ("SOFR"), with spread adjustments to match the transaction costs. The Company does not expect material impacts on the cash flows of these operations.