v3.25.4
Fair values of financial instruments carried at fair value - Quantitative information about significant unobservable inputs in Level 3 valuations (Details)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
quote
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets $ 3,117,161,000,000 $ 2,923,319,000,000
Financial liabilities $ 2,882,187,000,000 $ 2,682,252,000,000
Minimum | Equity volatility | Model – Option model | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.05  
Minimum | Foreign exchange volatility | Model – Option model | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0  
Minimum | Prepayment rate | Model – Discounted cash flow | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.05  
Minimum | Interest rate volatility | Model – Option model | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.05  
Maximum | Equity volatility | Model – Option model | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 1  
Maximum | Foreign exchange volatility | Model – Option model | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.22  
Maximum | Prepayment rate | Model – Discounted cash flow | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.10  
Maximum | Interest rate volatility | Model – Option model | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.20  
Level 3 | Minimum | Current Value/Cost | Price – Net asset value | Private equity including strategic investments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0 0
Level 3 | Minimum | Current Value/Cost | Price – Net asset value | Private equity including strategic investments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0 0
Level 3 | Minimum | Price | Market proxy | – bonds    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0 0
Level 3 | Minimum | Price | Market proxy | Loans    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0 0
Level 3 | Minimum | Price | Market proxy | – bonds    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0 0
Level 3 | Minimum | Price | Market proxy | Loans    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0 0
Level 3 | Minimum | Price | Market proxy | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 68  
Level 3 | Minimum | Price | Market proxy | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 68  
Level 3 | Minimum | Equity volatility | Model – Option model | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.05  
Level 3 | Minimum | Equity volatility | Model – Option model | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.05  
Level 3 | Minimum | Equity correlation | Model – Option model | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.10  
Level 3 | Minimum | Foreign exchange volatility | Model – Option model | – Foreign exchange-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.03  
Level 3 | Minimum | Foreign exchange volatility | Model – Option model | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0  
Level 3 | Minimum | Prepayment rate | Model – Discounted cash flow | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.05  
Level 3 | Minimum | Interest rate volatility | Model – Option model | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.05  
Level 3 | Maximum | Current Value/Cost | Price – Net asset value | Private equity including strategic investments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 75 291
Level 3 | Maximum | Current Value/Cost | Price – Net asset value | Private equity including strategic investments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 75 291
Level 3 | Maximum | Price | Market proxy | – bonds    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 3,342 140
Level 3 | Maximum | Price | Market proxy | Loans    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 112 103
Level 3 | Maximum | Price | Market proxy | – bonds    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 3,342 140
Level 3 | Maximum | Price | Market proxy | Loans    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 112 103
Level 3 | Maximum | Price | Market proxy | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 102  
Level 3 | Maximum | Price | Market proxy | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 102  
Level 3 | Maximum | Equity volatility | Model – Option model | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 1.32  
Level 3 | Maximum | Equity volatility | Model – Option model | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 1  
Level 3 | Maximum | Equity correlation | Model – Option model | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 1  
Level 3 | Maximum | Foreign exchange volatility | Model – Option model | – Foreign exchange-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.56  
Level 3 | Maximum | Foreign exchange volatility | Model – Option model | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.22  
Level 3 | Maximum | Prepayment rate | Model – Discounted cash flow | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.10  
Level 3 | Maximum | Interest rate volatility | Model – Option model | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.20  
Level 3 | Recurring fair value measurement    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets $ 36,445,000,000 $ 31,302,000,000
Financial liabilities 14,242,000,000 12,743,000,000
Level 3 | Recurring fair value measurement | Private equity including strategic investments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 1,000,000  
Level 3 | Recurring fair value measurement | Structured notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 10,617,000,000 9,113,000,000
Level 3 | Recurring fair value measurement | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 7,773,000,000  
Level 3 | Recurring fair value measurement | – Foreign exchange-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 862,000,000  
Level 3 | Recurring fair value measurement | Other derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 3,442,000,000 2,842,000,000
Level 3 | Recurring fair value measurement | – bonds    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 41,000,000  
Level 3 | Recurring fair value measurement | - other    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 130,000,000  
Level 3 | Recurring fair value measurement | – other structured notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 1,982,000,000  
Level 3 | Recurring fair value measurement | Loans    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 11,000,000 3,000,000
Level 3 | Recurring fair value measurement | Private equity including strategic investments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 20,960,000,000 18,258,000,000
Level 3 | Recurring fair value measurement | Structured notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0  
Level 3 | Recurring fair value measurement | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0  
Level 3 | Recurring fair value measurement | – Foreign exchange-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0  
Level 3 | Recurring fair value measurement | – other structured notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0  
Level 3 | Recurring fair value measurement | Derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 2,183,000,000  
Level 3 | Recurring fair value measurement | Bonds    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 7,475,000,000  
Level 3 | Recurring fair value measurement | Other portfolios    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 2,574,000,000 2,301,000,000
Level 3 | Recurring fair value measurement | Loans    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 3,253,000,000 $ 3,682,000,000
Level 3 | Recurring fair value measurement | Other portfolios    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 2,574,000,000  
Level 3 | Recurring fair value measurement | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 745,000,000  
Financial liabilities 966,000,000  
Level 3 | Recurring fair value measurement | Interest rate | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 358,000,000  
Level 3 | Recurring fair value measurement | Interest rate | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 3,000,000  
Level 3 | Recurring fair value measurement | Interest rate | other interest rate derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 605,000,000  
Level 3 | Recurring fair value measurement | Interest rate | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 98,000,000  
Level 3 | Recurring fair value measurement | Interest rate | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 4,000,000  
Level 3 | Recurring fair value measurement | Interest rate | other interest rate derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 643,000,000  
Level 3 | Recurring fair value measurement | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 678,000,000  
Financial liabilities 640,000,000  
Level 3 | Recurring fair value measurement | Foreign exchange | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 299,000,000  
Level 3 | Recurring fair value measurement | Foreign exchange | other interest rate derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 341,000,000  
Level 3 | Recurring fair value measurement | Foreign exchange | other interest rate derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 358,000,000  
Level 3 | Recurring fair value measurement | Foreign exchange | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 320,000,000  
Level 3 | Recurring fair value measurement | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 584,000,000  
Financial liabilities 1,315,000,000  
Level 3 | Recurring fair value measurement | Equities | other interest rate derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 839,000,000  
Level 3 | Recurring fair value measurement | Equities | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 476,000,000  
Level 3 | Recurring fair value measurement | Equities | other interest rate derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 474,000,000  
Level 3 | Recurring fair value measurement | Equities | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 110,000,000  
Level 3 | Recurring fair value measurement | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 146,000,000  
Financial liabilities 498,000,000  
Level 3 | Recurring fair value measurement | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 345,000,000  
Level 3 | Recurring fair value measurement | Credit | other credit derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 153,000,000  
Level 3 | Recurring fair value measurement | Credit | – other derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 23,000,000  
Level 3 | Recurring fair value measurement | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 56,000,000  
Level 3 | Recurring fair value measurement | Credit | other credit derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 90,000,000  
Level 3 | Recurring fair value measurement | Credit | – other derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets $ 30,000,000  
Level 3 | Recurring fair value measurement | Minimum | Price | Market proxy | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage | quote   0
Level 3 | Recurring fair value measurement | Minimum | Price | Market proxy | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage | quote   0
Level 3 | Recurring fair value measurement | Minimum | Equity volatility | Model – Option model | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.06
Level 3 | Recurring fair value measurement | Minimum | Equity volatility | Model – Option model | Equities | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.06
Level 3 | Recurring fair value measurement | Minimum | Equity volatility | Model – Option model | Equities | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage   0.06
Level 3 | Recurring fair value measurement | Minimum | Equity correlation | Model – Option model | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.15
Level 3 | Recurring fair value measurement | Minimum | Foreign exchange volatility | Model – Option model | – Foreign exchange-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.03
Level 3 | Recurring fair value measurement | Minimum | Foreign exchange volatility | Model – Option model | Foreign exchange | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.01
Level 3 | Recurring fair value measurement | Minimum | Foreign exchange volatility | Model – Option model | Foreign exchange | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage   0.01
Level 3 | Recurring fair value measurement | Minimum | Prepayment rate | Model – Discounted cash flow | Interest rate | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.05
Level 3 | Recurring fair value measurement | Minimum | Prepayment rate | Model – Discounted cash flow | Interest rate | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage   0.05
Level 3 | Recurring fair value measurement | Minimum | Interest rate volatility | Model – Option model | Interest rate | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.09
Level 3 | Recurring fair value measurement | Minimum | Interest rate volatility | Model – Option model | Interest rate | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage   0.09
Level 3 | Recurring fair value measurement | Maximum | Price | Market proxy | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage | quote   104
Level 3 | Recurring fair value measurement | Maximum | Price | Market proxy | Credit | total return swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage | quote   104
Level 3 | Recurring fair value measurement | Maximum | Equity volatility | Model – Option model | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.70
Level 3 | Recurring fair value measurement | Maximum | Equity volatility | Model – Option model | Equities | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   1.18
Level 3 | Recurring fair value measurement | Maximum | Equity volatility | Model – Option model | Equities | long-dated single stock options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage   1.18
Level 3 | Recurring fair value measurement | Maximum | Equity correlation | Model – Option model | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   1
Level 3 | Recurring fair value measurement | Maximum | Foreign exchange volatility | Model – Option model | – Foreign exchange-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.35
Level 3 | Recurring fair value measurement | Maximum | Foreign exchange volatility | Model – Option model | Foreign exchange | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.26
Level 3 | Recurring fair value measurement | Maximum | Foreign exchange volatility | Model – Option model | Foreign exchange | Foreign exchange options    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage   0.26
Level 3 | Recurring fair value measurement | Maximum | Prepayment rate | Model – Discounted cash flow | Interest rate | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.10
Level 3 | Recurring fair value measurement | Maximum | Prepayment rate | Model – Discounted cash flow | Interest rate | securitisation swaps    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage   0.10
Level 3 | Recurring fair value measurement | Maximum | Interest rate volatility | Model – Option model | Interest rate | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage   0.30
Level 3 | Recurring fair value measurement | Maximum | Interest rate volatility | Model – Option model | Interest rate | long-dated swaptions    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage   0.30