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Subsequent Events - Additional Information (Detail)
$ in Millions
Jan. 17, 2024
USD ($)
Installments
Jan. 05, 2024
USD ($)
Dec. 31, 2023
USD ($)
Jul. 31, 2020
Property Plant And Equipment Classfied As Held For Sale [Member] | Mature fields related with CGU Oil CGU Gas Austral Basin And CGU Gas Neuquina Basin [member]        
Disclosure of non-adjusting events after reporting period [line items]        
Assets classified as held for sale     $ 1,899  
Related Provision For Hydrocarbon Well Abandonment [Member] | Mature fields related with CGU Oil CGU Gas Austral Basin And CGU Gas Neuquina Basin [member]        
Disclosure of non-adjusting events after reporting period [line items]        
Liabilities classified as held for sale     $ 2,082  
Fixed interest rate [member]        
Disclosure of non-adjusting events after reporting period [line items]        
Borrowings interest rate       2.00%
Repurchase of Debt Notes [Member] | Negotiable obligations [member] | Fixed interest rate [member] | Class XXVIII [Member] | 2014 April, 2015 February and 2016 October [member]        
Disclosure of non-adjusting events after reporting period [line items]        
Aggregate notional amount for which offer was announced   $ 346    
Aggregate notional amount for which offer of repurchase was accepted   $ 138    
Percentage of outstanding debt for which repurchase was completed   40.00%    
Issue of Debt Notes [Member] | Negotiable obligations [member] | Fixed interest rate [member] | Number Class XXVIII Notes Issued Under Frequent Issuer Regime [Member] | Maturity Starting From July 2026 [Member]        
Disclosure of non-adjusting events after reporting period [line items]        
Borrowings maturity January 2031      
Borrowings interest rate 9.50%      
Borrowings notional amount $ 800      
Number of biaannual instalments | Installments 10      
Borrowings issue price percentage 99.083%      
Borrowings yield to maturity percentage 9.75%      
Percentage of the debt services to be covered 125.00%      
Period within which the amount deposited in the reserves shall be paid 6 months