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Financial and capital risk management - Effects of derivatives on statement of financial position and Net exposure (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Assets $ 522 $ 342
Liabilities 47 90
Not Designated As Hedging Instruments [Member]    
IfrsStatementLineItems [Line Items]    
Assets 1,081 538
Liabilities 145 276
Derivative Financial Assets Liabilities 936 262
Not Designated As Hedging Instruments [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 966 425
Liabilities 71 214
Derivative Financial Assets Liabilities 895 211
Not Designated As Hedging Instruments [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 115 113
Liabilities 71 57
Derivative Financial Assets Liabilities 44 56
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 90 11
Liabilities 30 144
Derivative Financial Assets Liabilities 60 (133)
Not Designated As Hedging Instruments [Member] | Ipca Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Liabilities 41 63
Derivative Financial Assets Liabilities (41) (63)
Not Designated As Hedging Instruments [Member] | Dollar Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 868 407
Liabilities   7
Derivative Financial Assets Liabilities 868 400
Not Designated As Hedging Instruments [Member] | Libor Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 8 7
Derivative Financial Assets Liabilities [1] 8 7
Not Designated As Hedging Instruments [Member] | Bunker Oil Gasoil And Brent [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 70 78
Liabilities 71 56
Derivative Financial Assets Liabilities (1) 22
Not Designated As Hedging Instruments [Member] | Energy Transition Materials [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 45 35
Liabilities   1
Derivative Financial Assets Liabilities 45 34
Not Designated As Hedging Instruments [Member] | Other Options [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Liabilities 3 5
Derivative Financial Assets Liabilities $ (3) $ (5)
[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 has finalized the negotiations for the replacement of 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.