v3.26.1
Fair values of financial instruments carried at fair value - Movement in Level 3 financial instruments (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance $ 36,445  
Financial assets, ending balance 35,969  
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Financial liabilities, beginning balance 14,242  
Financial liabilities, ending balance 17,218  
Trading liabilities | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Financial liabilities, beginning balance 72,122  
Financial liabilities, ending balance 86,363  
Trading liabilities | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Financial liabilities, beginning balance 67  
Total gains or losses recognised in profit or loss (5) $ (20)
Total gains/(losses) recognised in other comprehensive income (‘OCI’) 1 22
Purchases 11 58
New issuances 0 0
Sales (98) (12)
Settlements (43) (318)
Transfers out (1) (482)
Transfers in 97 15
Financial liabilities, ending balance 29 47
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period 12 28
Financial assets and liabilities designated and otherwise mandatorily measured at fair value through profit or loss | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Financial liabilities, beginning balance 158,456  
Financial liabilities, ending balance 173,751  
Financial assets and liabilities designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Financial liabilities, beginning balance 10,733  
Total gains or losses recognised in profit or loss 13 112
Total gains/(losses) recognised in other comprehensive income (‘OCI’) (85) 419
Purchases 0 0
New issuances 6,243 2,966
Sales 0 0
Settlements (2,592) (2,355)
Transfers out (2,436) (2,826)
Transfers in 1,645 1,587
Financial liabilities, ending balance 13,521 9,020
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period (120) (179)
Derivatives | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Financial liabilities, beginning balance 237,854  
Financial liabilities, ending balance 254,662  
Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Financial liabilities, beginning balance 3,442  
Total gains or losses recognised in profit or loss 1,207 893
Total gains/(losses) recognised in other comprehensive income (‘OCI’) (47) 237
Purchases 0 0
New issuances 0 0
Sales 0 0
Settlements (776) (341)
Transfers out (515) (464)
Transfers in 357 504
Financial liabilities, ending balance 3,668 3,671
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period (1,086) (1,307)
Financial investments    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance 385,122  
Financial assets, ending balance 386,439  
Financial investments | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance 385,122  
Financial assets, ending balance 386,439  
Financial investments | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance 2,805  
Total gains or losses recognised in profit or loss 1 1
Total gains/(losses) recognised in other comprehensive income (‘OCI’) (88) 238
Purchases 1,057 880
New issuances 0 0
Sales (14) (127)
Settlements (1,673) (313)
Transfers out (492) (1,478)
Transfers in 112 185
Financial assets, ending balance 1,708 2,120
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 0 0
Trading assets | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance 366,153  
Financial assets, ending balance 423,987  
Trading assets | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance 6,097  
Total gains or losses recognised in profit or loss (440) (37)
Total gains/(losses) recognised in other comprehensive income (‘OCI’) 24 266
Purchases 3,670 2,312
New issuances 0 1
Sales (2,514) (1,541)
Settlements (346) (1,419)
Transfers out (354) (1,690)
Transfers in 706 656
Financial assets, ending balance 6,843 5,223
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 36 55
Designated and otherwise mandatorily measured at fair value through profit or loss | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance 133,063  
Financial assets, ending balance 138,942  
Designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance 25,360  
Total gains or losses recognised in profit or loss 202 912
Total gains/(losses) recognised in other comprehensive income (‘OCI’) (149) (76)
Purchases 2,518 2,003
New issuances 129 0
Sales (94) (75)
Settlements (2,886) (182)
Transfers out (262) (184)
Transfers in 554 2,448
Financial assets, ending balance 25,372 24,590
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 107 116
Derivatives | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance 237,740  
Financial assets, ending balance 255,995  
Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Financial assets, beginning balance 2,183  
Total gains or losses recognised in profit or loss 627 605
Total gains/(losses) recognised in other comprehensive income (‘OCI’) (25) 195
Purchases 0 0
New issuances 0 0
Sales 0 0
Settlements (584) (404)
Transfers out (285) (300)
Transfers in 130 389
Financial assets, ending balance 2,046 2,634
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 804 699
– net income or losses from financial instruments held for trading or managed on a fair value basis | Trading liabilities | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Total gains or losses recognised in profit or loss (5) (20)
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period 12 28
– net income or losses from financial instruments held for trading or managed on a fair value basis | Financial assets and liabilities designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Total gains or losses recognised in profit or loss 13 112
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period 0 0
– net income or losses from financial instruments held for trading or managed on a fair value basis | Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Total gains or losses recognised in profit or loss 1,207 893
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period (1,086) (1,307)
– net income or losses from financial instruments held for trading or managed on a fair value basis | Financial investments | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss 0 0
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 0 0
– net income or losses from financial instruments held for trading or managed on a fair value basis | Trading assets | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss (440) (37)
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 36 55
– net income or losses from financial instruments held for trading or managed on a fair value basis | Designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss 0 0
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 0 0
– net income or losses from financial instruments held for trading or managed on a fair value basis | Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss 627 605
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 804 699
– net income from assets and liabilities of insurance businesses, including related derivatives, measured at fair value through profit or loss | Trading liabilities | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Total gains or losses recognised in profit or loss 0 0
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period 0 0
– net income from assets and liabilities of insurance businesses, including related derivatives, measured at fair value through profit or loss | Financial assets and liabilities designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Total gains or losses recognised in profit or loss 0 0
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period 0 0
– net income from assets and liabilities of insurance businesses, including related derivatives, measured at fair value through profit or loss | Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Total gains or losses recognised in profit or loss 0 0
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period 0 0
– net income from assets and liabilities of insurance businesses, including related derivatives, measured at fair value through profit or loss | Financial investments | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss 0 0
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 0 0
– net income from assets and liabilities of insurance businesses, including related derivatives, measured at fair value through profit or loss | Trading assets | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss 0 0
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 0 0
– net income from assets and liabilities of insurance businesses, including related derivatives, measured at fair value through profit or loss | Designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss 238 867
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 120 94
– net income from assets and liabilities of insurance businesses, including related derivatives, measured at fair value through profit or loss | Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss 0 0
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 0 0
– changes in fair value of other financial instruments mandatorily measured at fair value through profit or loss | Trading liabilities | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period 0 0
– changes in fair value of other financial instruments mandatorily measured at fair value through profit or loss | Financial assets and liabilities designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period (120) (179)
– changes in fair value of other financial instruments mandatorily measured at fair value through profit or loss | Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Unrealised gains or losses recognised in profit or loss relating to liabilities held at end of period 0 0
– changes in fair value of other financial instruments mandatorily measured at fair value through profit or loss | Financial investments | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 0 0
– changes in fair value of other financial instruments mandatorily measured at fair value through profit or loss | Trading assets | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 0 0
– changes in fair value of other financial instruments mandatorily measured at fair value through profit or loss | Designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period (13) 22
– changes in fair value of other financial instruments mandatorily measured at fair value through profit or loss | Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Unrealised gains or losses recognised in profit or loss relating to assets held at end of period 0 0
– other income/(losses) | Trading liabilities | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Total gains or losses recognised in profit or loss 0 0
– other income/(losses) | Financial assets and liabilities designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Total gains or losses recognised in profit or loss 0 0
– other income/(losses) | Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, liabilities [abstract]    
Total gains or losses recognised in profit or loss 0 0
– other income/(losses) | Financial investments | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss 1 1
– other income/(losses) | Trading assets | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss 0 0
– other income/(losses) | Designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss (36) 45
– other income/(losses) | Derivatives | Level 3 | Recurring fair value measurement    
Reconciliation of changes in fair value measurement, assets [abstract]    
Total gains or losses recognised in profit or loss $ 0 $ 0