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Other financial assets and liabilities (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Other Provision, beginning $ 3,869  
Renegotiation of concession contracts 256  
Revision to estimates and new provisions (88)  
Monetary and present value adjustments (580)  
Disbursements (1,103)  
Other Provision, ending 2,354  
Current liabilities 467 $ 591
Non-current liabilities 1,887 3,278
Liabilities 2,354 $ 3,869
Payment Obligation [Member]    
IfrsStatementLineItems [Line Items]    
Other Provision, beginning 1,130  
Renegotiation of concession contracts 827  
Revision to estimates and new provisions 25  
Monetary and present value adjustments (152)  
Disbursements (712)  
Other Provision, ending $ 1,118  
Discount rate in nominal terms   11.04%
Remaining term of obligations 33 years  
Liabilities $ 1,118 $ 1,130
Payment Obligation [Member] | Bottom of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate in nominal terms 7.32%  
Payment Obligation [Member] | Top of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate in nominal terms 11.04%  
Infrastructure Investment [Member]    
IfrsStatementLineItems [Line Items]    
Other Provision, beginning $ 2,739  
Renegotiation of concession contracts (571)  
Revision to estimates and new provisions (113)  
Monetary and present value adjustments (428)  
Disbursements (391)  
Other Provision, ending $ 1,236  
Remaining term of obligations 7 years  
Liabilities $ 1,236 $ 2,739
Infrastructure Investment [Member] | Bottom of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate in nominal terms 7.43% 5.17%
Infrastructure Investment [Member] | Top of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate in nominal terms 8.12% 5.54%