v3.25.2
Fair values of financial instruments carried at fair value - Financial instruments measured at fair value using a valuation technique with significant unobservable inputs - Level 3 (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2022
Financial investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets $ 381,746 $ 339,193    
Recurring fair value measurement | Trading liabilities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 70,653 65,982    
Recurring fair value measurement | Designated at fair value        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 163,589 138,727    
Recurring fair value measurement | Derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 257,601 264,448    
Recurring fair value measurement | Financial investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 381,746 339,193    
Recurring fair value measurement | Trading assets        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 333,745 314,842    
Recurring fair value measurement | Designated and otherwise mandatorily measured at fair value through profit or loss        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 128,942 115,769    
Recurring fair value measurement | Derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 249,672 268,637    
Recurring fair value measurement | Level 3        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 34,567 31,302    
Financial liabilities 12,738 12,743    
Recurring fair value measurement | Level 3 | Private equity including strategic investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 1 1    
Recurring fair value measurement | Level 3 | Asset-backed securities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Structured notes        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 9,017 9,113    
Recurring fair value measurement | Level 3 | Other derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 3,671 2,842    
Recurring fair value measurement | Level 3 | Other portfolios        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 49 787    
Recurring fair value measurement | Level 3 | Trading liabilities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 47 784 $ 130 $ 478
Recurring fair value measurement | Level 3 | Trading liabilities | Private equity including strategic investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Trading liabilities | Asset-backed securities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Trading liabilities | Structured notes        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Trading liabilities | Other derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Trading liabilities | Other portfolios        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 47 784    
Recurring fair value measurement | Level 3 | Designated at fair value        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 9,020 9,117 12,159 10,928
Recurring fair value measurement | Level 3 | Designated at fair value | Private equity including strategic investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 1 1    
Recurring fair value measurement | Level 3 | Designated at fair value | Asset-backed securities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Designated at fair value | Structured notes        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 9,017 9,113    
Recurring fair value measurement | Level 3 | Designated at fair value | Other derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Designated at fair value | Other portfolios        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 2 3    
Recurring fair value measurement | Level 3 | Derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 3,671 2,842 3,481 2,569
Recurring fair value measurement | Level 3 | Derivatives | Private equity including strategic investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Derivatives | Asset-backed securities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Derivatives | Structured notes        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Derivatives | Other derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 3,671 2,842    
Recurring fair value measurement | Level 3 | Derivatives | Other portfolios        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
Recurring fair value measurement | Level 3 | Private equity including strategic investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 19,951 18,258    
Recurring fair value measurement | Level 3 | Asset-backed securities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 331 380    
Recurring fair value measurement | Level 3 | Structured notes        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 3    
Recurring fair value measurement | Level 3 | Other derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets   2,149    
Recurring fair value measurement | Level 3 | Other portfolios        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets   10,512    
Recurring fair value measurement | Level 3 | Financial investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 2,120 2,734 2,414 2,618
Recurring fair value measurement | Level 3 | Financial investments | Private equity including strategic investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 587 552    
Recurring fair value measurement | Level 3 | Financial investments | Asset-backed securities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 160 182    
Recurring fair value measurement | Level 3 | Financial investments | Structured notes        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Level 3 | Financial investments | Other derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Level 3 | Financial investments | Other portfolios        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 1,373 2,000    
Recurring fair value measurement | Level 3 | Trading assets        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 5,223 6,675 4,080 4,306
Recurring fair value measurement | Level 3 | Trading assets | Private equity including strategic investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 1 1    
Recurring fair value measurement | Level 3 | Trading assets | Asset-backed securities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 171 198    
Recurring fair value measurement | Level 3 | Trading assets | Structured notes        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Level 3 | Trading assets | Other derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Level 3 | Trading assets | Other portfolios        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 5,051 6,476    
Recurring fair value measurement | Level 3 | Designated and otherwise mandatorily measured at fair value through profit or loss        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 24,590 19,744 21,621 19,788
Recurring fair value measurement | Level 3 | Designated and otherwise mandatorily measured at fair value through profit or loss | Private equity including strategic investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 19,363 17,705    
Recurring fair value measurement | Level 3 | Designated and otherwise mandatorily measured at fair value through profit or loss | Asset-backed securities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Level 3 | Designated and otherwise mandatorily measured at fair value through profit or loss | Structured notes        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 3    
Recurring fair value measurement | Level 3 | Designated and otherwise mandatorily measured at fair value through profit or loss | Other derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Level 3 | Designated and otherwise mandatorily measured at fair value through profit or loss | Other portfolios        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 5,227 2,036    
Recurring fair value measurement | Level 3 | Derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 2,634 2,149 $ 2,511 $ 2,069
Recurring fair value measurement | Level 3 | Derivatives | Private equity including strategic investments        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Level 3 | Derivatives | Asset-backed securities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Level 3 | Derivatives | Structured notes        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Level 3 | Derivatives | Other derivatives        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 2,634 2,149    
Recurring fair value measurement | Level 3 | Derivatives | Other portfolios        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets $ 0 $ 0