v3.25.4
Fair values of financial instruments carried at fair value - Financial instruments carried at fair value and bases of valuation (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  
Trading liabilities      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 72,122 65,982  
Financial liabilities designated at fair value      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 158,456 138,727  
Trading assets      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 366,153 314,842  
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 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  
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  
Recurring fair value measurement | Trading liabilities      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 72,122 65,982  
Recurring fair value measurement | Trading liabilities | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Recurring fair value measurement | Trading liabilities | Level 1      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 46,579 42,038  
Recurring fair value measurement | Trading liabilities | Level 1 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Recurring fair value measurement | Trading liabilities | Level 2      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 25,476 23,160  
Recurring fair value measurement | Trading liabilities | Level 2 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Recurring fair value measurement | Trading liabilities | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 67 784 $ 478
Recurring fair value measurement | Trading liabilities | Level 3 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Recurring fair value measurement | Financial liabilities designated at fair value      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 158,456 138,727  
Recurring fair value measurement | Financial liabilities designated at fair value | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 1,345 130  
Recurring fair value measurement | Financial liabilities designated at fair value | Level 1      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 1,370 2,152  
Recurring fair value measurement | Financial liabilities designated at fair value | Level 1 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 1,345 0  
Recurring fair value measurement | Financial liabilities designated at fair value | Level 2      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 146,353 127,458  
Recurring fair value measurement | Financial liabilities designated at fair value | Level 2 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 130  
Recurring fair value measurement | Financial liabilities designated at fair value | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 10,733 9,117 10,928
Recurring fair value measurement | Financial liabilities designated at fair value | Level 3 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Recurring fair value measurement | Derivatives      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 237,854 264,448  
Recurring fair value measurement | Derivatives | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 16 19  
Recurring fair value measurement | Derivatives | Level 1      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 1,853 1,088  
Recurring fair value measurement | Derivatives | Level 1 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 0 0  
Recurring fair value measurement | Derivatives | Level 2      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 232,559 260,518  
Recurring fair value measurement | Derivatives | Level 2 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 13 19  
Recurring fair value measurement | Derivatives | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 3,442 2,842 2,569
Recurring fair value measurement | Derivatives | Level 3 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 3 0  
Recurring fair value measurement | Trading assets      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 366,153 314,842  
Recurring fair value measurement | Trading assets | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 113 0  
Recurring fair value measurement | Trading assets | Level 1      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 267,638 236,593  
Recurring fair value measurement | Trading assets | Level 1 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 26 0  
Recurring fair value measurement | Trading assets | Level 2      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 92,418 71,574  
Recurring fair value measurement | Trading assets | Level 2 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 87 0  
Recurring fair value measurement | Trading assets | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 6,097 6,675 4,306
Recurring fair value measurement | Trading assets | Level 3 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Recurring fair value measurement | 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 133,063 115,769  
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 6,351 14,560  
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Level 1      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 46,436 39,331  
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Level 1 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 6,327 2,967  
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Level 2      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 61,267 56,694  
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Level 2 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 24 9,018  
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 25,360 19,744 19,788
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 2,575  
Recurring fair value measurement | Derivatives      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 237,740 268,637  
Recurring fair value measurement | Derivatives | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 14 36  
Recurring fair value measurement | Derivatives | Level 1      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 1,798 1,859  
Recurring fair value measurement | Derivatives | Level 1 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 0 0  
Recurring fair value measurement | Derivatives | Level 2      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 233,759 264,629  
Recurring fair value measurement | Derivatives | Level 2 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 9 36  
Recurring fair value measurement | Derivatives | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 2,183 2,149 2,069
Recurring fair value measurement | Derivatives | Level 3 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 5 0  
Recurring fair value measurement | 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  
Recurring fair value measurement | Financial assets at fair value through other comprehensive income, category | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 201 8,500  
Recurring fair value measurement | Financial assets at fair value through other comprehensive income, category | Level 1      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 300,795 258,371  
Recurring fair value measurement | Financial assets at fair value through other comprehensive income, category | Level 1 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 157 2,651  
Recurring fair value measurement | Financial assets at fair value through other comprehensive income, category | Level 2      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 81,522 78,088  
Recurring fair value measurement | Financial assets at fair value through other comprehensive income, category | Level 2 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 44 5,345  
Recurring fair value measurement | Financial assets at fair value through other comprehensive income, category | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 2,805 2,734 $ 2,618
Recurring fair value measurement | Financial assets at fair value through other comprehensive income, category | Level 3 | Assets held for sale      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets $ 0 $ 504