v3.26.3
Taxes (Details 5) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
IfrsStatementLineItems [Line Items]    
Total $ (9,219) $ (5,339)
Depreciation Amortization And Write Offs Of Assets [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - Exploration and decommissioning costs  
Total $ (6,128) (6,471)
Amortization Impairment Reversals Write Offs Assets [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - Impairment  
Total $ 4,537 4,454
Depreciation Amortization And Write Offs Of Assets One [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - Right-of-use assets  
Total $ (14,025) (12,596)
Depreciation Amortization And Write Offs Of Assets Two [Member]    
IfrsStatementLineItems [Line Items]    
Nature PP&E - depreciation methods and capitalized borrowing costs  
Total $ (21,005) (19,066)
Payments Receipts Considerations [Member]    
IfrsStatementLineItems [Line Items]    
Nature Loans, trade and other receivables / payables and financing  
Total $ (2,347) (665)
Appropriation Of The Considerations [Member]    
IfrsStatementLineItems [Line Items]    
Nature Leasings  
Total $ 15,190 14,322
Payments And Use Of Provisions [Member]    
IfrsStatementLineItems [Line Items]    
Nature Provision for decommissioning costs  
Total $ 10,144 9,957
Payments And Use Of Provisions One [Member]    
IfrsStatementLineItems [Line Items]    
Nature Provision for legal proceedings  
Total $ 1,073 1,053
Taxable Income Compensation [Member]    
IfrsStatementLineItems [Line Items]    
Nature Tax loss carryforwards  
Total $ 740 720
Sales Writedowns And Losses [Member]    
IfrsStatementLineItems [Line Items]    
Nature Inventories  
Total $ 804 453
Payments And Use Provisions [Member]    
IfrsStatementLineItems [Line Items]    
Nature Employee Benefits  
Total $ 1,398 1,586
Others [Member]    
IfrsStatementLineItems [Line Items]    
Nature Others  
Total $ 400 $ 914