v3.26.1
Wells, Pipelines, Properties, Plant and Equipment, Net - Assumptions to Determine NPV of Cash Flows (Pemex Industrial Tranformation) (Detail)
 12 Months Ended
Dec. 31, 2025
$ / $
Dec. 31, 2024
$ / $
millionsPerDay
USD ($)
Dec. 31, 2023
millionsPerDay
USD ($)
Dec. 31, 2023
millionsPerDay
USD ($)
Dec. 31, 2023
$ / $
millionsPerDay
USD ($)
Dec. 31, 2023
$ / $
millionsPerDay
USD ($)
Dec. 31, 2022
$ / $
Refining              
Disclosure of detailed information about property, plant and equipment [line items]              
Rate of U.S.$ 17.9667 20.2683          
Industrial Transformation              
Disclosure of detailed information about property, plant and equipment [line items]              
Pre-tax discount rate       13.68%     14.16%
Industrial Transformation | Refining              
Disclosure of detailed information about property, plant and equipment [line items]              
Average crude oil Price (U.S.$) | $   101.82 105.5 105.5 105.5 105.5  
Processed volume (millions per day) | millionsPerDay   866,000 993,000 993,000 993,000 993,000  
Rate of U.S.$         16.9220 16.9220 19.4143
Useful lives of the cash-generating units (year average)   12 years 12 years        
Pre-tax discount rate   14.75%   13.68%      
Industrial Transformation | Gas              
Disclosure of detailed information about property, plant and equipment [line items]              
Processed volume (millions per day) | millionsPerDay   2,746,000,000 3,201,000,000 3,201,000,000 3,201,000,000 3,201,000,000  
Rate of U.S.$   20.2683     16.9220    
Useful lives of the cash-generating units (year average)   7 years 6 years        
Pre-tax discount rate   15.93%   12.25%      
Industrial Transformation | Petrochemicals              
Disclosure of detailed information about property, plant and equipment [line items]              
Rate of U.S.$   20.2683     16.9220    
Useful lives of the cash-generating units (year average)   4 years 5 years        
Pre-tax discount rate   11.35%   10.31%      
Industrial Transformation | Ethylene              
Disclosure of detailed information about property, plant and equipment [line items]              
Rate of U.S.$   20.2683     16.9220    
Useful lives of the cash-generating units (year average)   7 years 5 years        
Pre-tax discount rate   11.35%   10.31%      
Industrial Transformation | Fertilizers              
Disclosure of detailed information about property, plant and equipment [line items]              
Rate of U.S.$   20.2683     16.9220    
Useful lives of the cash-generating units (year average)   6 years 5 years        
Pre-tax discount rate   12.35%   13.25%