v3.25.4
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
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets $ 3,117,161 $ 2,923,319  
Financial liabilities 2,882,187 2,682,252  
Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 36,445 31,302  
Financial liabilities 14,242 12,743  
Private equity including strategic investments | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 1 1  
Structured notes | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 10,617 9,113  
Other derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 3,442 2,842  
Other portfolios | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 130 757  
Bonds | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 41 27  
Loans | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 11 3  
Trading liabilities      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 72,122 65,982  
Trading liabilities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 72,122 65,982  
Trading liabilities | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 67 784 $ 478
Trading liabilities | Private equity including strategic investments | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Trading liabilities | Structured notes | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Trading liabilities | Other derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Trading liabilities | Other portfolios | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 15 754  
Trading liabilities | Bonds | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 41 27  
Trading liabilities | Loans | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 11 3  
Financial liabilities designated at fair value      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 158,456 138,727  
Financial liabilities designated at fair value | Recurring fair value measurement      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 158,456 138,727  
Financial liabilities designated at fair value | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 10,733 9,117 10,928
Financial liabilities designated at fair value | Private equity including strategic investments | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 1 1  
Financial liabilities designated at fair value | Structured notes | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 10,617 9,113  
Financial liabilities designated at fair value | Other derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Financial liabilities designated at fair value | Other portfolios | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 115 3  
Financial liabilities designated at fair value | Bonds | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Financial liabilities designated at fair value | Loans | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Derivatives | Recurring fair value measurement      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 237,854 264,448  
Derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 3,442 2,842 2,569
Derivatives | Private equity including strategic investments | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Derivatives | Structured notes | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Derivatives | Other derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 3,442 2,842  
Derivatives | Other portfolios | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Derivatives | Bonds | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Derivatives | Loans | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Private equity including strategic investments | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 20,960 18,258  
Structured notes | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 3  
Other derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 2,183 2,149  
Other portfolios | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 2,574 2,301  
Bonds | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 7,475 4,909  
Loans | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 3,253 3,682  
Financial assets at fair value through other comprehensive income, category      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 385,122 339,193  
Financial assets at fair value through other comprehensive income, category | Recurring fair value measurement      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 385,122 339,193  
Financial assets at fair value through other comprehensive income, category | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 2,805 2,734 2,618
Financial assets at fair value through other comprehensive income, category | Private equity including strategic investments | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 595 552  
Financial assets at fair value through other comprehensive income, category | Structured notes | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Financial assets at fair value through other comprehensive income, category | Other derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Financial assets at fair value through other comprehensive income, category | Other portfolios | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 78 182  
Financial assets at fair value through other comprehensive income, category | Bonds | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 2,111 1,978  
Financial assets at fair value through other comprehensive income, category | Loans | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 21 22  
Trading assets      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 366,153 314,842  
Trading assets | Recurring fair value measurement      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 366,153 314,842  
Trading assets | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 6,097 6,675 4,306
Trading assets | Private equity including strategic investments | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 1 1  
Trading assets | Structured notes | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Trading assets | Other derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Trading assets | Other portfolios | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 1,073 2,118  
Trading assets | Bonds | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 3,356 2,173  
Trading assets | Loans | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 1,667 2,383  
Financial assets 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 3,942 3,357  
Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Recurring fair value measurement      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 133,063 115,769  
Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 25,360 19,744 19,788
Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Private equity including strategic investments | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 20,364 17,705  
Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Structured notes | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 3  
Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Other derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Other portfolios | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 1,423 1  
Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Bonds | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 2,008 758  
Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Loans | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 1,565 1,277  
Derivatives | Recurring fair value measurement      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 237,740 268,637  
Derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 2,183 2,149 $ 2,069
Derivatives | Private equity including strategic investments | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Derivatives | Structured notes | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Derivatives | Other derivatives | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 2,183 2,149  
Derivatives | Other portfolios | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Derivatives | Bonds | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Derivatives | Loans | Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets $ 0 $ 0