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Taxes (Details 3) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Total $ (548) $ (9,945)
Deferred tax assets 922 965
Deferred tax liabilities $ (1,470) (10,910)
Depreciation Amortization And Write Offs Of Assets [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - Exploration and decommissioning costs  
Total $ (6,286) (6,296)
Amortization Impairment Reversals Write Offs Assets [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - Impairment  
Total $ 3,462 4,203
Depreciation Amortization And Write Offs Of Assets One [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - Right-of-use assets  
Total $ (8,518) (9,369)
Depreciation Amortization And Write Offs Of Assets Two [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - depreciation methods and capitalized borrowing costs  
Total $ (16,043) (18,784)
Payments Receipts Considerations [Member]    
IfrsStatementLineItems [Line Items]    
Nature Loans, trade and other receivables / payables and financing  
Total $ 2,636 (2,479)
Appropriation Of The Considerations [Member]    
IfrsStatementLineItems [Line Items]    
Nature Leasings  
Total $ 10,829 9,240
Payments And Use Of Provisions [Member]    
IfrsStatementLineItems [Line Items]    
Nature Provision for decommissioning costs  
Total $ 9,118 8,010
Payments And Use Of Provisions One [Member]    
IfrsStatementLineItems [Line Items]    
Nature Provision for legal proceedings  
Total $ 818 954
Taxable Income Compensation [Member]    
IfrsStatementLineItems [Line Items]    
Nature Tax loss carryforwards  
Total $ 976 1,140
Sales Writedowns And Losses [Member]    
IfrsStatementLineItems [Line Items]    
Nature Inventories  
Total $ 424 411
Payments And Use Provisions [Member]    
IfrsStatementLineItems [Line Items]    
Nature Employee Benefits  
Total $ 1,191 2,036
Others [Member]    
IfrsStatementLineItems [Line Items]    
Nature Others  
Total $ 845 $ 989