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Taxes (Details 1) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]      
Deferred tax assets taxes losses carryforward $ 5,516 $ 5,704  
Deferred tax liabilities taxes losses carryforward  
Deferred tax assets 8,244 9,565 $ 10,770
Deferred tax liabilities (445) (870) $ (1,413)
Asset Retirement Obligations And Other Liabilities [Member]      
IfrsStatementLineItems [Line Items]      
Deferred tax assets 2,829 4,165  
Deferred tax liabilities (509) (807)  
Fair Value Of Financial Instruments [Member]      
IfrsStatementLineItems [Line Items]      
Deferred tax assets 932 735  
Employee Post Retirement Obligations [Member]      
IfrsStatementLineItems [Line Items]      
Deferred tax assets 368 478  
Provision For Litigation [Member]      
IfrsStatementLineItems [Line Items]      
Deferred tax assets 327 306  
Fair Value Of Property Plant And Equipment In Business Combination [Member]      
IfrsStatementLineItems [Line Items]      
Deferred tax liabilities (1,695) (2,034)  
Goodwill Amortization [Member]      
IfrsStatementLineItems [Line Items]      
Deferred tax liabilities (462) (575)  
Other temporary differences [member]      
IfrsStatementLineItems [Line Items]      
Deferred tax assets 494 723  
Temporary differences [member]      
IfrsStatementLineItems [Line Items]      
Deferred tax assets 10,466 12,111  
Deferred tax liabilities $ (2,666) $ (3,416)