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Provisions - Summary of Changes in Group's Provisions (Parenthetical) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Trust Settlement Agreement [Member]      
Disclosure of provisions [line items]      
Amount reclassified as current provision due to the Trust Settlement Agreement $ 286    
Hydrocarbon Wells Abandonmnet Cost [member]      
Disclosure of provisions [line items]      
Abandonment of hydrocarbon wells cost 507 $ 268 $ 32
Hydrocarbon Wells Abandonmnet Cost [member] | Dispute relating to the tax deduction of hydrocarbon well abandonment costs for periods 2014-2017      
Disclosure of provisions [line items]      
Recovery of Liabilities of Dispute relating to tax Deduction   30  
Hydrocarbon Wells Abandonmnet Cost [member] | Other contingent liabilities [member] | Dispute relating to the tax deduction of hydrocarbon well abandonment costs for periods 2014-2017 | Administracion Federal De Ingresos Publicos [member]      
Disclosure of provisions [line items]      
Increase decrease through transfers and other changes other provisions   $ 22  
Transportadora De Gas Del Norte SA [member]      
Disclosure of provisions [line items]      
Other liabilities $ 134