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Other financial assets and liabilities - Liabilities related to the concession grant (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Other Provision, beginning $ 2,197  
Addition 849  
Present value adjustment 308  
Disbursements (384)  
Other Provision, Ending 2,970  
Current liabilities 416 $ 760
Non-current liabilities 2,554 1,437
Liabilities 2,970 2,197
Payment Obligation [Member]    
IfrsStatementLineItems [Line Items]    
Other Provision, beginning 586  
Addition 440  
Present value adjustment 148  
Disbursements (220)  
Other Provision, Ending 954  
Liabilities $ 954 $ 586
Discount rate 11.04% 11.04%
Infrastructure Investment [Member]    
IfrsStatementLineItems [Line Items]    
Other Provision, beginning $ 1,611  
Addition 409  
Present value adjustment 160  
Disbursements (164)  
Other Provision, Ending 2,016  
Liabilities $ 2,016 $ 1,611
Infrastructure Investment [Member] | Bottom of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate 6.08% 5.11%
Infrastructure Investment [Member] | Top of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate 6.23% 5.75%