v3.26.1
Acquisitions and Disposals - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Jan. 22, 2026
Dec. 18, 2025
Oct. 28, 2025
Sep. 29, 2025
Aug. 06, 2025
Jun. 04, 2025
Jan. 29, 2025
Dec. 17, 2024
Dec. 31, 2025
Feb. 01, 2026
Dec. 12, 2025
Jan. 31, 2025
Disclosure of detailed information about Acquisitions and Disposals [Line Items]                        
Total price of the transaction                   $ 163.0    
Proportion of ownership interest in subsidiary 100.00%                      
Consideration transferred, acquisition-date fair value                   $ 163.0    
Percentage of voting equity interests acquired                   44.90%    
Other Comprehensive Income Reclassification Adjustments Due To Acquisition Or Disposal Of Subsidiaries Associates Joint Ventures                 $ 46.0      
Refinor [member]                        
Disclosure of detailed information about Acquisitions and Disposals [Line Items]                        
Total price of the transaction     $ 25.2                  
Proportion of ownership interest in subsidiary     100.00%                  
Consideration transferred, acquisition-date fair value     $ 25.2                  
Percentage of voting equity interests acquired     50.00%                  
Proportion of ownership interest in subsidiary prior to afore mentioned     50.00%                  
Cash transferred     $ 17.0                  
Business combination consideration transferred by compensation with credits     8.2                  
Other Comprehensive Income Reclassification Adjustments Due To Acquisition Or Disposal Of Subsidiaries Associates Joint Ventures     $ 46.0                  
Profertil [member]                        
Disclosure of detailed information about Acquisitions and Disposals [Line Items]                        
Percentage of ownership in the subsidiary to be disposed off                     50.00%  
Increase in other operating results   $ 335.0                    
Disposal of subsidiaries sale price   596.00%                    
Percentage of ownership interest disposed   50.00%                    
Receivable from disposal of subsidiaries pending payment                 $ 396.0      
Mobil Argentina S.A. [Member]                        
Disclosure of detailed information about Acquisitions and Disposals [Line Items]                        
Total price of the transaction             $ 327.0          
Proportion of ownership interest in subsidiary             100.00%          
Consideration transferred, acquisition-date fair value             $ 327.0          
Sierra Chata [Member]                        
Disclosure of detailed information about Acquisitions and Disposals [Line Items]                        
Proportion of ownership interest in subsidiary               54.45%        
OLCLP [Member]                        
Disclosure of detailed information about Acquisitions and Disposals [Line Items]                        
Total price of the transaction           $ 15.0            
Increase in other operating results           $ 45.0            
Proportion of ownership interest in subsidiary           100.00%            
Consideration transferred, acquisition-date fair value           $ 15.0            
Percentage of voting equity interests acquired           15.00%           15.00%
Proportion of ownership interest in subsidiary prior to afore mentioned           85.00%            
Cash transferred           $ 1.4            
Business combinations consideration transferred by offsetting payment obligations           $ 13.6            
VMI [Member]                        
Disclosure of detailed information about Acquisitions and Disposals [Line Items]                        
Total price of the transaction       $ 523.0                
Percentage of ownership in the subsidiary to be disposed off 44.44%                      
Proportion of ownership interest in subsidiary       100.00% 100.00%              
Working interest in unconventional exploitation concessions       45.00%                
Consideration transferred, acquisition-date fair value       $ 523.0