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Taxes (Details 4) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
UTPs not recorded on statement of financial position (iii)    
Transfer pricing over the exportation of ores to a foreign subsidiary $ 4,995 $ 5,154
Expenses of interest on capital 1,262 1,511
Proceeding related to income tax paid abroad 427 512
Goodwill amortization 805 796
Payments to Renova Foundation 652 703
Other 415 468
Total not recorded on statement of financial position  8,556 9,144
UTPs recorded as part of the taxes payable liability on statement of financial position    
Deduction of CSLL in Brazil 154 183
Total recorded on statement of financial position  154 183
Assessed [Member]    
UTPs not recorded on statement of financial position (iii)    
Transfer pricing over the exportation of ores to a foreign subsidiary 3,387 2,144
Expenses of interest on capital 1,262 1,511
Proceeding related to income tax paid abroad 427 512
Goodwill amortization 743 606
Payments to Renova Foundation 301 167
Other 415 468
Total not recorded on statement of financial position  6,535 5,408
UTPs recorded as part of the taxes payable liability on statement of financial position    
Deduction of CSLL in Brazil 154 183
Total recorded on statement of financial position  154 183
Not In Dispute [Member]    
UTPs not recorded on statement of financial position (iii)    
Transfer pricing over the exportation of ores to a foreign subsidiary 1,608 3,010
Expenses of interest on capital
Proceeding related to income tax paid abroad
Goodwill amortization 62 190
Payments to Renova Foundation 351 536
Other
Total not recorded on statement of financial position  2,021 3,736
UTPs recorded as part of the taxes payable liability on statement of financial position    
Deduction of CSLL in Brazil
Total recorded on statement of financial position