v3.25.4
Emissions schemes and related environmental programmes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Emissions And Related Environmental Schemes [Line Items]      
Cost of environmental schemes and related environmental plans $ 5,131 $ 3,946 $ 3,626
At January 1 9,480    
At December 31 11,010 9,480  
Current (10,621) (9,838)  
Non-current (4,061) (2,990)  
Emissions instruments      
Disclosure Of Emissions And Related Environmental Schemes [Line Items]      
At January 1 2,514 2,391  
Additions 3,659 3,862  
Settlements (3,525) (3,607)  
Other movements 231 (132)  
At December 31 2,879 2,514 2,391
Current (4,605) (3,518) (3,853)
Non-current (716) (417) (193)
Total obligations (5,321) (3,935) (4,046)
Additions (5,819) (4,644)  
Additions covered by government grants 666 675  
Settlements 4,163 3,931  
Other movements (396) 149  
Total increase (decrease) (1,386) 111  
ETS and related schemes      
Disclosure Of Emissions And Related Environmental Schemes [Line Items]      
Cost of environmental schemes and related environmental plans 398 381 493
At January 1 301 441  
Additions 134 299  
Settlements (317) (392)  
Other movements 43 (47)  
At December 31 161 301 441
Current (445) (388) (498)
Non-current (37) 0 0
Total obligations (482) (388) (498)
Additions (1,078) (1,051)  
Additions covered by government grants 666 675  
Settlements 389 453  
Other movements (71) 33  
Total increase (decrease) (94) 110  
Biofuels      
Disclosure Of Emissions And Related Environmental Schemes [Line Items]      
Cost of environmental schemes and related environmental plans 4,203 2,942 2,581
At January 1 2,082 1,805  
Additions 3,057 3,146  
Settlements (2,793) (2,804)  
Other movements 255 (65)  
At December 31 2,601 2,082 1,805
Current (3,823) (2,594) (3,012)
Non-current (576) (408) (105)
Total obligations (4,399) (3,002) (3,117)
Additions (4,205) (2,981)  
Settlements 3,153 3,011  
Other movements (345) 85  
Total increase (decrease) (1,397) 115  
Renewable power      
Disclosure Of Emissions And Related Environmental Schemes [Line Items]      
Cost of environmental schemes and related environmental plans 530 623 552
At January 1 131 145  
Additions 468 417  
Settlements (415) (411)  
Other movements (67) (20)  
At December 31 117 131 145
Current (337) (536) (343)
Non-current (103) (9) (88)
Total obligations (440) (545) $ (431)
Additions (536) (612)  
Settlements 621 467  
Other movements 20 31  
Total increase (decrease) $ 105 $ (114)