v3.25.4
Climate change and energy transition - Additional information 6 (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of Climate Change and Energy Transition [Line Items]    
Global oil production % 1.50%  
Global gas production % 2.00%  
Deferred tax $ 8,173 $ 6,857
Provision for decommissioning and restoration, undiscounted 34,000 32,000
Amount of provisions expected to be utilized $ 18,801 18,000
Decommissioning term 50 years  
Onerous contracts provision $ 1,000 $ 1,100
Assets tested for exposure to climate related risks   70.00%
Assets exposed to climate related risks   12.00%
Forecast | Retained earnings    
Disclosure of Climate Change and Energy Transition [Line Items]    
Increase through realisation of merger reserve 234,000  
Brazil, Malaysia and Australia    
Disclosure of Climate Change and Energy Transition [Line Items]    
Deferred tax $ 1,079 $ 625
All other segments    
Disclosure of Climate Change and Energy Transition [Line Items]    
Nominal post-tax discount rate 7.50% 7.50%
Renewables and Energy Solutions    
Disclosure of Climate Change and Energy Transition [Line Items]    
Nominal post-tax discount rate 6.00% 6.00%
Chemical & products and Marketing    
Disclosure of Climate Change and Energy Transition [Line Items]    
Deferred tax $ 283 $ 315
Bottom of range    
Disclosure of Climate Change and Energy Transition [Line Items]    
Planning horizon 10 years  
Bottom of range | Chemicals and Products | IEA NZE50 | Forecast    
Disclosure of Climate Change and Energy Transition [Line Items]    
Decrease in recoverable amount of assets $ (2,000) (1,000)
Top of range | Chemicals and Products | IEA NZE50 | Forecast    
Disclosure of Climate Change and Energy Transition [Line Items]    
Decrease in recoverable amount of assets $ (3,000) (2,000)
Actuarial assumption of discount rates    
Disclosure of Climate Change and Energy Transition [Line Items]    
Range of assumptions, possible increase 1.00%  
Actuarial assumption of discount rates | All other segments    
Disclosure of Climate Change and Energy Transition [Line Items]    
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets $ 0 0
Actuarial assumption of discount rates | Bottom of range | Integrated Gas and Upstream segments    
Disclosure of Climate Change and Energy Transition [Line Items]    
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets 3,000 1,000
Actuarial assumption of discount rates | Top of range | Integrated Gas and Upstream segments    
Disclosure of Climate Change and Energy Transition [Line Items]    
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets 6,000 $ 3,000
Actuarial assumption of discount rates | Top of range | Chemicals and Products    
Disclosure of Climate Change and Energy Transition [Line Items]    
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets 2,000  
Actuarial assumption of discount rates | Top of range | Marketing    
Disclosure of Climate Change and Energy Transition [Line Items]    
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets $ 1,000