v3.25.4
Material accounting policies, judgements and estimates (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
competitor
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]  
Self-generated biofuel certificates, value recognized | $ $ 0
Performance Share Awards (PSA)  
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]  
Performance period 3 years
Main competitors 4
Share price volatility period 3 years
Dividend yield period 10 years
Vesting period of share-based compensation 3 years
Restricted Share Awards (RSA)  
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]  
Vesting period of share-based compensation 3 years
Percentage of grant date fair value 1
Performance Share Plan (PSP)  
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]  
Main competitors 4
Share price volatility period 3 years
Dividend yield period 10 years
Chemical plants  
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]  
Useful lives of tangible assets 20 years
Retail service stations  
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]  
Useful lives of tangible assets 15 years
Upgraders | Bottom of range  
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]  
Major inspection costs useful economic life 3 years
Upgraders | Top of range  
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]  
Major inspection costs useful economic life 5 years