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Taxes (Details 3) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Total $ (6,597) $ (548)
Deferred tax assets 1,005 922
Deferred tax liabilities $ (7,602) (1,470)
Depreciation Amortization And Write Offs Of Assets [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - Exploration and decommissioning costs  
Total $ (6,730) (6,286)
Amortization Impairment Reversals Write Offs Assets [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - Impairment  
Total $ 3,958 3,462
Depreciation Amortization And Write Offs Of Assets One [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - Right-of-use assets  
Total $ (12,567) (8,518)
Depreciation Amortization And Write Offs Of Assets Two [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - depreciation methods and capitalized borrowing costs  
Total $ (18,593) (16,043)
Payments Receipts Considerations [Member]    
IfrsStatementLineItems [Line Items]    
Nature Loans, trade and other receivables / payables and financing  
Total $ (1,085) 2,636
Appropriation Of The Considerations [Member]    
IfrsStatementLineItems [Line Items]    
Nature Leasings  
Total $ 13,536 10,829
Payments And Use Of Provisions [Member]    
IfrsStatementLineItems [Line Items]    
Nature Provision for decommissioning costs  
Total $ 10,321 9,118
Payments And Use Of Provisions One [Member]    
IfrsStatementLineItems [Line Items]    
Nature Provision for legal proceedings  
Total $ 928 818
Taxable Income Compensation [Member]    
IfrsStatementLineItems [Line Items]    
Nature Tax loss carryforwards  
Total $ 995 976
Sales Writedowns And Losses [Member]    
IfrsStatementLineItems [Line Items]    
Nature Inventories  
Total $ 491 424
Payments And Use Provisions [Member]    
IfrsStatementLineItems [Line Items]    
Nature Employee Benefits  
Total $ 1,354 1,191
Others [Member]    
IfrsStatementLineItems [Line Items]    
Nature Others  
Total $ 795 $ 845