v3.26.1
Financial assets and liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
IfrsStatementLineItems [Line Items]    
Total current financial assets $ 8,951 $ 10,277
Total non-current financial assets 1,127 926
Total financial assets 10,078 11,203
Current financial liabilities 8,743 7,468
Non-current financial liabilities 22,713 22,995
Total of financial liabilities 31,456 30,463
Cash And Cash Equivalents Current [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 5,577 7,372
Short Term Investment [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 188 194
Derivative Financial Assets [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 572  
Total non-current financial assets 463 203
Accounts Receivable Current [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 2,614 2,297
Judicial Deposits [Member]    
IfrsStatementLineItems [Line Items]    
Total non-current financial assets 577 651
Restricted Cash [Member]    
IfrsStatementLineItems [Line Items]    
Total non-current financial assets 12 9
Investments In Equity Securities Noncurrent [Member]    
IfrsStatementLineItems [Line Items]    
Total non-current financial assets 75 63
Suppliers And Contractors Current [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 6,203 5,565
Derivatives [member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 142 94
Non-current financial liabilities 178 52
Loans And Borrowings Current [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 1,093 518
Non-current financial liabilities 17,211 17,616
Leases [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 169 160
Non-current financial liabilities 465 508
Subordinate Notes [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 15 4
Non-current financial liabilities 742 741
Railway Concession [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 629 570
Other Financial Liabilities Related Parties [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 216 235
Other Financial Liabilities [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 276 322
Participative Stockholders Debentures Noncurrent [Member]    
IfrsStatementLineItems [Line Items]    
Non-current financial liabilities 2,313 2,254
Government Grant [Member]    
IfrsStatementLineItems [Line Items]    
Non-current financial liabilities 1,790 1,824
Loans And Receivables Or Amortized Cost [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 5,719 7,533
Total non-current financial assets 589 660
Total financial assets 6,308 8,193
Current financial liabilities 8,601 7,374
Non-current financial liabilities 20,208 20,689
Total of financial liabilities 28,809 28,063
Loans And Receivables Or Amortized Cost [Member] | Cash And Cash Equivalents Current [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 5,577 7,372
Loans And Receivables Or Amortized Cost [Member] | Accounts Receivable Current [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 142 161
Loans And Receivables Or Amortized Cost [Member] | Judicial Deposits [Member]    
IfrsStatementLineItems [Line Items]    
Total non-current financial assets 577 651
Loans And Receivables Or Amortized Cost [Member] | Restricted Cash [Member]    
IfrsStatementLineItems [Line Items]    
Total non-current financial assets 12 9
Loans And Receivables Or Amortized Cost [Member] | Suppliers And Contractors Current [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 6,203 5,565
Loans And Receivables Or Amortized Cost [Member] | Loans And Borrowings Current [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 1,093 518
Non-current financial liabilities 17,211 17,616
Loans And Receivables Or Amortized Cost [Member] | Leases [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 169 160
Non-current financial liabilities 465 508
Loans And Receivables Or Amortized Cost [Member] | Subordinate Notes [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 15 4
Non-current financial liabilities 742 741
Loans And Receivables Or Amortized Cost [Member] | Railway Concession [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 629 570
Loans And Receivables Or Amortized Cost [Member] | Other Financial Liabilities Related Parties [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 216 235
Loans And Receivables Or Amortized Cost [Member] | Other Financial Liabilities [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 276 322
Loans And Receivables Or Amortized Cost [Member] | Government Grant [Member]    
IfrsStatementLineItems [Line Items]    
Non-current financial liabilities 1,790 1,824
Financial assets at fair value through profit or loss, category [member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 3,232 2,744
Total non-current financial assets 463 203
Total financial assets 3,695 2,947
Financial assets at fair value through profit or loss, category [member] | Short Term Investment [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 188 194
Financial assets at fair value through profit or loss, category [member] | Derivative Financial Assets [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 572 414
Total non-current financial assets 463 203
Financial assets at fair value through profit or loss, category [member] | Accounts Receivable Current [Member]    
IfrsStatementLineItems [Line Items]    
Total current financial assets 2,472 2,136
Financial assets measured at fair value through other comprehensive income, category [member]    
IfrsStatementLineItems [Line Items]    
Total non-current financial assets 75 63
Total financial assets 75 63
Financial assets measured at fair value through other comprehensive income, category [member] | Investments In Equity Securities Noncurrent [Member]    
IfrsStatementLineItems [Line Items]    
Total non-current financial assets 75 63
Financial Liabilities At Fair Value Through Profit Or Loss Category Membe [Member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 142 94
Non-current financial liabilities 2,505 2,306
Total of financial liabilities 2,647 2,400
Financial Liabilities At Fair Value Through Profit Or Loss Category Membe [Member] | Derivatives [member]    
IfrsStatementLineItems [Line Items]    
Current financial liabilities 142 94
Non-current financial liabilities 178 52
Financial Liabilities At Fair Value Through Profit Or Loss Category Membe [Member] | Other Financial Liabilities [Member]    
IfrsStatementLineItems [Line Items]    
Non-current financial liabilities 14  
Financial Liabilities At Fair Value Through Profit Or Loss Category Membe [Member] | Participative Stockholders Debentures Noncurrent [Member]    
IfrsStatementLineItems [Line Items]    
Non-current financial liabilities $ 2,313 $ 2,254