Financial assets and liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
IfrsStatementLineItems [Line Items]
Total current financial assets	$ 10,277	$ 7,417
Total non-current financial assets	926	619
Total financial assets	11,203	8,036
Current financial liabilities	7,468	6,944
Non-current financial liabilities	22,995	18,902
Financial liabilities	30,463	25,846
Cash And Cash Equivalents Current [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	7,372	4,953
Short Term Investment [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	194	53
Derivative Financial Assets [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	414
Total non-current financial assets	203	15
Accounts Receivable Current [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	2,297	2,358
Judicial Deposits [Member]
IfrsStatementLineItems [Line Items]
Total non-current financial assets	651	537
Restricted Cash [Member]
IfrsStatementLineItems [Line Items]
Total non-current financial assets	9	13
Investments In Equity Securities Noncurrent [Member]
IfrsStatementLineItems [Line Items]
Total non-current financial assets	63	54
Suppliers And Contractors Current [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	5,565	4,234
Derivatives [member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	94	197
Non-current financial liabilities	52	428
Loans And Borrowings Current [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	518	1,020
Non-current financial liabilities	17,616	13,772
Leases [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	160	147
Non-current financial liabilities	508	566
Subordinate Notes [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	4
Non-current financial liabilities	741
Railway Concession [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	570	467
Other Financial Liabilities Related Parties [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	235	291
Other Financial Liabilities [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	322	588
Non-current financial liabilities		32
Participative Stockholders Debentures Noncurrent [Member]
IfrsStatementLineItems [Line Items]
Non-current financial liabilities	2,254	2,217
Government Grant [Member]
IfrsStatementLineItems [Line Items]
Non-current financial liabilities	1,824	1,887
Loans And Receivables Or Amortized Cost [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	7,533	5,327
Total non-current financial assets	660	550
Total financial assets	8,193	5,877
Current financial liabilities	7,374	6,747
Non-current financial liabilities	20,689	16,257
Financial liabilities	28,063	23,004
Loans And Receivables Or Amortized Cost [Member] \| Cash And Cash Equivalents Current [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	7,372	4,953
Loans And Receivables Or Amortized Cost [Member] \| Accounts Receivable Current [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	161	374
Loans And Receivables Or Amortized Cost [Member] \| Judicial Deposits [Member]
IfrsStatementLineItems [Line Items]
Total non-current financial assets	651	537
Loans And Receivables Or Amortized Cost [Member] \| Restricted Cash [Member]
IfrsStatementLineItems [Line Items]
Total non-current financial assets	9	13
Loans And Receivables Or Amortized Cost [Member] \| Suppliers And Contractors Current [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	5,565	4,234
Loans And Receivables Or Amortized Cost [Member] \| Loans And Borrowings Current [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	518	1,020
Non-current financial liabilities	17,616	13,772
Loans And Receivables Or Amortized Cost [Member] \| Leases [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	160	147
Non-current financial liabilities	508	566
Loans And Receivables Or Amortized Cost [Member] \| Subordinate Notes [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	4
Non-current financial liabilities	741
Loans And Receivables Or Amortized Cost [Member] \| Railway Concession [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	570	467
Loans And Receivables Or Amortized Cost [Member] \| Other Financial Liabilities Related Parties [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	235	291
Loans And Receivables Or Amortized Cost [Member] \| Other Financial Liabilities [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	322	588
Non-current financial liabilities		32
Loans And Receivables Or Amortized Cost [Member] \| Government Grant [Member]
IfrsStatementLineItems [Line Items]
Non-current financial liabilities	1,824	1,887
Financial assets at fair value through profit or loss, category [member]
IfrsStatementLineItems [Line Items]
Total current financial assets	2,744	2,090
Total non-current financial assets	203	15
Total financial assets	2,947	2,105
Financial assets at fair value through profit or loss, category [member] \| Short Term Investment [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	194	53
Financial assets at fair value through profit or loss, category [member] \| Derivative Financial Assets [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	414	53
Total non-current financial assets	203	15
Financial assets at fair value through profit or loss, category [member] \| Accounts Receivable Current [Member]
IfrsStatementLineItems [Line Items]
Total current financial assets	2,136	1,984
Financial assets measured at fair value through other comprehensive income, category [member]
IfrsStatementLineItems [Line Items]
Total non-current financial assets	63	54
Total financial assets	63	54
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	63	54
Financial Liabilities At Fair Value Through Profit Or Loss Category Membe [Member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	94	197
Non-current financial liabilities	2,306	2,645
Financial liabilities	2,400	2,842
Financial Liabilities At Fair Value Through Profit Or Loss Category Membe [Member] \| Derivatives [member]
IfrsStatementLineItems [Line Items]
Current financial liabilities	94	197
Non-current financial liabilities	52	428
Financial Liabilities At Fair Value Through Profit Or Loss Category Membe [Member] \| Participative Stockholders Debentures Noncurrent [Member]
IfrsStatementLineItems [Line Items]
Non-current financial liabilities	$ 2,254	$ 2,217

The amount of current financial assets. [Refer: Financial assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 25
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard
-URIDate 2024-03-27

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- Definition

The amount of current financial liabilities. [Refer: Financial liabilities]

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- Definition

The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]]

+ References

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- Definition

The amount of non-current financial assets. [Refer: Financial assets]

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The amount of non-current financial liabilities. [Refer: Financial liabilities]

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