v3.25.4
Climate change and energy transition - Additional information 5 (Details)
$ in Millions
 12 Months Ended 108 Months Ended
Dec. 31, 2025
USD ($)
numberOfRefinery
$ / Boe
$ / Tonne
Dec. 31, 2024
USD ($)
Dec. 31, 2025
USD ($)
numberOfRefinery
Dec. 31, 2016
USD ($)
numberOfRefinery
Disclosure of Climate Change and Energy Transition [Line Items]        
Number of assets | numberOfRefinery 7   7 15
Number of refineries assumed | numberOfRefinery     2  
Number of closed refineries | numberOfRefinery     10  
Property, plant and equipment $ 185,077 $ 185,219 $ 185,077  
Other assets $ 8,000   8,000  
Average chemical margin (USD per ton) | $ / Tonne 299.5      
Cash flow projection period 20 years      
Reasonably possible decrease in long-term chemical margin assumptions, per crude oil barrel | $ / Boe 30      
Reasonably possible increase in long-term chemical margin assumptions, per crude oil barrel | $ / Boe 30      
Impairment loss due to reasonably possible increase in long-term chemical margin assumptions $ 500 500    
Impairment reversal due to decrease in long-term chemical margin assumptions $ 0      
Refining margin (USD per BBL) | $ / Boe 9      
Decrease in long-term refining margin assumptions (USD per BBL) | $ / Boe 1      
Increase in long-term refining margin assumptions (USD per BBL) | $ / Boe 1      
Impairment loss due to increase in long-term refining margin assumptions   0    
Top of range        
Disclosure of Climate Change and Energy Transition [Line Items]        
Impairment reversal due to decrease in long-term chemical margin assumptions $ 0      
Impairment loss due to increase in long-term refining margin assumptions 1,500      
Impairment reversal due to decrease in long-term refining margin assumptions 0 500    
Chemicals and Products        
Disclosure of Climate Change and Energy Transition [Line Items]        
Property, plant and equipment 33,600 32,600 33,600  
Trading and Supply        
Disclosure of Climate Change and Energy Transition [Line Items]        
Other assets $ 6,000   6,000  
Refineries        
Disclosure of Climate Change and Energy Transition [Line Items]        
Property, plant and equipment       $ 10,000
Refineries | Minimum        
Disclosure of Climate Change and Energy Transition [Line Items]        
Useful lives of tangible assets 4 years      
Refineries | Maximum        
Disclosure of Climate Change and Energy Transition [Line Items]        
Useful lives of tangible assets 12 years      
Refineries | Chemicals and Products        
Disclosure of Climate Change and Energy Transition [Line Items]        
Property, plant and equipment   $ 6,000    
Useful lives of tangible assets 20 years      
PPE other than refineries        
Disclosure of Climate Change and Energy Transition [Line Items]        
Property, plant and equipment $ 32,000   32,000  
Chemicals segment        
Disclosure of Climate Change and Energy Transition [Line Items]        
Property, plant and equipment $ 24,000   $ 24,000