v3.25.2
Fair values of financial instruments carried at fair value - Financial instruments carried at fair value and bases of valuation (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 | 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 | Trading liabilities        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 70,653 65,982    
Recurring fair value measurement | Trading liabilities | Disposal groups classified as 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 47,182 42,038    
Recurring fair value measurement | Trading liabilities | Level 1 | Disposal groups classified as 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 23,424 23,160    
Recurring fair value measurement | Trading liabilities | Level 2 | Disposal groups classified as 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 47 784 $ 130 $ 478
Recurring fair value measurement | Trading liabilities | Level 3 | Disposal groups classified as 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 163,589 138,727    
Recurring fair value measurement | Financial liabilities designated at fair value | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 13 130    
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 2,526 2,152    
Recurring fair value measurement | Financial liabilities designated at fair value | Level 1 | Disposal groups classified as 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 | Level 2        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 152,043 127,458    
Recurring fair value measurement | Financial liabilities designated at fair value | Level 2 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 13 130    
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 9,020 9,117 12,159 10,928
Recurring fair value measurement | Financial liabilities designated at fair value | Level 3 | Disposal groups classified as 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 257,601 264,448    
Recurring fair value measurement | Derivatives | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 12 19    
Recurring fair value measurement | Derivatives | Level 1        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 2,072 1,088    
Recurring fair value measurement | Derivatives | Level 1 | Disposal groups classified as 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 251,858 260,518    
Recurring fair value measurement | Derivatives | Level 2 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 12 19    
Recurring fair value measurement | Derivatives | Level 3        
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 | Derivatives | Level 3 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial liabilities 0 0    
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 | Trading assets | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Trading assets | Level 1        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 247,679 236,593    
Recurring fair value measurement | Trading assets | Level 1 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Trading assets | Level 2        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 80,843 71,574    
Recurring fair value measurement | Trading assets | Level 2 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
Recurring fair value measurement | Trading assets | Level 3        
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 | Trading assets | Level 3 | Disposal groups classified as 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 128,942 115,769    
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 16,972 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 46,797 39,331    
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Level 1 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 3,060 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 57,555 56,694    
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Level 2 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 11,246 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 24,590 19,744 21,621 19,788
Recurring fair value measurement | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Level 3 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 2,666 2,575    
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 | Derivatives | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 51 36    
Recurring fair value measurement | Derivatives | Level 1        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 1,271 1,859    
Recurring fair value measurement | Derivatives | Level 1 | Disposal groups classified as 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 245,767 264,629    
Recurring fair value measurement | Derivatives | Level 2 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 51 36    
Recurring fair value measurement | Derivatives | Level 3        
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 | Derivatives | Level 3 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 0 0    
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 | Financial investments | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 15,854 8,500    
Recurring fair value measurement | Financial investments | Level 1        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 302,583 258,371    
Recurring fair value measurement | Financial investments | Level 1 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 3,193 2,651    
Recurring fair value measurement | Financial investments | Level 2        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 77,043 78,088    
Recurring fair value measurement | Financial investments | Level 2 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets 12,151 5,345    
Recurring fair value measurement | Financial investments | Level 3        
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 | Financial investments | Level 3 | Disposal groups classified as held for sale        
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]        
Financial assets $ 510 $ 504