v3.25.4
Taxation - Summary of Deferred Tax (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax asset, Beginning balance $ 19,311 $ 19,623
Credit/(charge) to income 502 1,193
Currency translation differences 460 (338)
Other comprehensive income 219 (83)
Other movements (1,495) (1,084)
Deferred tax asset, Ending balance 18,997 19,311
Deferred tax liability, Beginning Balance (25,959) (28,516)
(Charge)/credit to income (659) (888)
Currency translation differences (579) 685
Other comprehensive income 2,026 (284)
Other movements 2,364 3,044
Deferred tax liability, Ending Balance (22,807) (25,959)
Deferred tax liability (asset) (3,810) (6,648)
Deferred tax asset 8,173 6,857
Deferred tax liability (11,983) (13,505)
Decommissioning and other provisions    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax asset, Beginning balance 6,841 7,577
Credit/(charge) to income 396 528
Currency translation differences 194 (94)
Other comprehensive income 4 0
Other movements (1,003) (1,170)
Deferred tax asset, Ending balance 6,432 6,841
Property, plant and equipment    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax asset, Beginning balance 1,814 1,584
Credit/(charge) to income (271) 254
Currency translation differences 11 (7)
Other comprehensive income 0 0
Other movements (27) (17)
Deferred tax asset, Ending balance 1,527 1,814
Deferred tax liability, Beginning Balance (18,914) (21,996)
(Charge)/credit to income (1,130) (799)
Currency translation differences (229) 231
Other comprehensive income (2) (2)
Other movements 2,472 3,652
Deferred tax liability, Ending Balance (17,803) (18,914)
Tax losses and credits carried forward    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax asset, Beginning balance 3,567 4,280
Credit/(charge) to income 455 (388)
Currency translation differences 164 (129)
Other comprehensive income 7 33
Other movements 69 (229)
Deferred tax asset, Ending balance 4,262 3,567
Retirement benefits    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax asset, Beginning balance 1,854 1,750
Credit/(charge) to income (8) 0
Currency translation differences 78 (77)
Other comprehensive income 165 (162)
Other movements (488) 343
Deferred tax asset, Ending balance 1,601 1,854
Deferred tax liability, Beginning Balance (3,250) (2,880)
(Charge)/credit to income 57 (138)
Currency translation differences (271) 386
Other comprehensive income 2,001 (267)
Other movements 4 (351)
Deferred tax liability, Ending Balance (1,459) (3,250)
Other    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax asset, Beginning balance 5,235 4,432
Credit/(charge) to income (70) 799
Currency translation differences 13 (31)
Other comprehensive income 43 46
Other movements (46) (11)
Deferred tax asset, Ending balance 5,175 5,235
Deferred tax liability, Beginning Balance (3,795) (3,640)
(Charge)/credit to income 414 49
Currency translation differences (79) 68
Other comprehensive income 27 (15)
Other movements (112) (257)
Deferred tax liability, Ending Balance $ (3,545) $ (3,795)