v3.25.4
Tax - Movement of deferred tax assets and liabilities (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Assets, beginning of period $ 8,898 $ 9,930
Liabilities, beginning of period (3,374) (3,414)
Deferred tax liability (asset) beginning balance 5,524 6,516
Income statement 202 (1,130)
Other comprehensive income (984) 338
Foreign exchange and other adjustments 393 (200)
Deferred tax liability (asset) ending balance 5,135 5,524
Assets, end of period 8,530 8,898
Liabilities, end of period (3,395) (3,374)
Deferred tax assets 7,235 6,841
Deferred tax liabilities 2,100 1,317
Loan impairment provisions    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Assets, beginning of period 1,070 1,158
Liabilities, beginning of period 0 0
Deferred tax liability (asset) beginning balance 1,070 1,158
Income statement 11 (74)
Other comprehensive income 0 0
Foreign exchange and other adjustments (25) (14)
Deferred tax liability (asset) ending balance 1,056 1,070
Assets, end of period 1,056 1,070
Liabilities, end of period 0 0
Unused tax losses and tax credits    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Assets, beginning of period 3,864 4,544
Liabilities, beginning of period 0 0
Deferred tax liability (asset) beginning balance 3,864 4,544
Income statement (466) (640)
Other comprehensive income 0 0
Foreign exchange and other adjustments 74 (40)
Deferred tax liability (asset) ending balance 3,472 3,864
Assets, end of period 3,472 3,864
Liabilities, end of period 0 0
Financial assets at FVOCI    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Assets, beginning of period 616 876
Liabilities, beginning of period 0 0
Deferred tax liability (asset) beginning balance 616 876
Income statement 226 100
Other comprehensive income (564) (49)
Foreign exchange and other adjustments 221 (311)
Deferred tax liability (asset) ending balance 499 616
Assets, end of period 499 616
Liabilities, end of period 0 0
Cash flow hedges    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Assets, beginning of period 442 419
Liabilities, beginning of period 0 0
Deferred tax liability (asset) beginning balance 442 419
Income statement 10 0
Other comprehensive income (587) 84
Foreign exchange and other adjustments 23 (61)
Deferred tax liability (asset) ending balance (112) 442
Assets, end of period 0 442
Liabilities, end of period (112) 0
Retirement obligations    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Assets, beginning of period 0 0
Liabilities, beginning of period (1,767) (1,814)
Deferred tax liability (asset) beginning balance (1,767) (1,814)
Income statement (96) (85)
Other comprehensive income 6 114
Foreign exchange and other adjustments (100) 18
Deferred tax liability (asset) ending balance (1,957) (1,767)
Assets, end of period 0 0
Liabilities, end of period (1,957) (1,767)
Other    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Assets, beginning of period 2,906 2,933
Liabilities, beginning of period (1,607) (1,600)
Deferred tax liability (asset) beginning balance 1,299 1,333
Income statement 517 (431)
Other comprehensive income 161 189
Foreign exchange and other adjustments 200 208
Deferred tax liability (asset) ending balance 2,177 1,299
Assets, end of period 3,503 2,906
Liabilities, end of period $ (1,326) $ (1,607)