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Assets Held for Sale and Associated Liabilities - Additional Information (Detail)
$ in Millions
12 Months Ended
Jan. 06, 2025
Dec. 19, 2024
Nov. 28, 2024
Oct. 29, 2024
Dec. 31, 2024
USD ($)
Feb. 03, 2025
USD ($)
Jan. 31, 2025
USD ($)
Dec. 05, 2024
USD ($)
Nov. 15, 2024
USD ($)
Dec. 31, 2023
Sep. 30, 2023
Assets Held For Sale And Associated Liabilities [Line Items]                      
Discount rate used in current estimate of value in use         14.80%         15.00% 14.89%
Gain loss on change in fair value of asset held for sale [1]         $ (260)            
Provision for operating optimizations         266            
Provision for severance indemnities         63            
Escalante El Trebol [Member]                      
Assets Held For Sale And Associated Liabilities [Line Items]                      
Proportion of ownership interest in subsidiary       100.00%              
Proportion of transfer of shares                 100.00%    
Consideration transferred, acquisition-date fair value                 $ 87    
Llancanelo and Llancanelo R [Member]                      
Assets Held For Sale And Associated Liabilities [Line Items]                      
Proportion of ownership interest in subsidiary     100.00%                
Proportion of transfer of shares               100.00%      
Consideration transferred, acquisition-date fair value               $ 29      
Assets and liabilities classified as held for sale         110            
Estacion Fernandez Oro [member]                      
Assets Held For Sale And Associated Liabilities [Line Items]                      
Proportion of ownership interest in subsidiary   100.00%                  
Proportion of transfer of shares           100.00%          
Consideration transferred, acquisition-date fair value           $ 23          
Campamento Central Canadon Perdido [Member]                      
Assets Held For Sale And Associated Liabilities [Line Items]                      
Proportion of ownership interest in subsidiary 100.00%                    
Proportion of transfer of shares             100.00%        
Consideration transferred, acquisition-date fair value             $ 28        
Assets and liabilities classified as held for sale         $ 45            
Proportion of working interest in subsidiary 50                    
[1] See Note 11 “Mature Fields Project“ section.