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Income taxes - Uncertain tax position (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Income Taxes    
Transfer pricing over the exportation of ores to a foreign subsidiary $ 829 $ 669
Expenses of interest on capital 1,154 981
Proceeding related to income tax paid abroad 439 399
Goodwill amortization 517 305
Payments to Renova Foundation 24 21
Other 696 747
Total not recorded on balance sheet 3,659 3,122
Deduction of CSLL in Brazil 155
Gain related to incidence of IRPJ and CSLL on SELIC rate in the repetition of undue payment 34
 Total recorded balance sheet $ 155 $ 34