v3.25.2
Fair values of financial instruments carried at fair value - Quantitative information about significant unobservable inputs in Level 3 valuations (Details) - Recurring fair value measurement
$ in Millions
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Private equity including strategic investments | Minimum | Current Value/Cost | Price – Net asset value    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0 0
Private equity including strategic investments | Maximum | Current Value/Cost | Price – Net asset value    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 75 291
– equity-linked notes | Minimum | Equity volatility | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.05 0.06
– equity-linked notes | Maximum | Equity volatility | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.67 0.70
– foreign exchange (‘FX’)-linked notes | Minimum | FX volatility | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.04 0.03
– foreign exchange (‘FX’)-linked notes | Maximum | FX volatility | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.19 0.35
– equity-linked notes | Minimum | Equity correlation | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.10 0.15
– equity-linked notes | Maximum | Equity correlation | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 1 1
securitisation swaps | Minimum | Prepayment rate | Model – Discounted cash flow | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.05 0.05
securitisation swaps | Maximum | Prepayment rate | Model – Discounted cash flow | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.10 0.10
long-dated swaptions | Minimum | Interest rate volatility | Model – Option model | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.09 0.09
long-dated swaptions | Maximum | Interest rate volatility | Model – Option model | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.30 0.30
FX options | Minimum | FX volatility | Model – Option model | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.01 0.01
FX options | Maximum | FX volatility | Model – Option model | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.19 0.26
long-dated single stock options | Minimum | Equity volatility | Model – Option model | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.05 0.06
long-dated single stock options | Maximum | Equity volatility | Model – Option model | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 1.19 1.18
total return swaps | Minimum | Price | Market proxy | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 73 0
total return swaps | Maximum | Price | Market proxy | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 106 104
– repurchase agreements | Minimum | Interest rate volatility | Model – Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0 0
– repurchase agreements | Maximum | Interest rate volatility | Model – Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0.03 0.26
– bonds | Minimum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0 0
– bonds | Maximum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 126 140
– loans and deposits | Minimum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 0 0
– loans and deposits | Maximum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, liabilities, percentage 111 103
Private equity including strategic investments | Minimum | Current Value/Cost | Price – Net asset value    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0 0
Private equity including strategic investments | Maximum | Current Value/Cost | Price – Net asset value    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 75 291
– collateralised loan/debt obligation | Minimum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0 0
– collateralised loan/debt obligation | Maximum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 100 97
– other ABSs | Minimum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0 0
– other ABSs | Maximum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 255 248
– equity-linked notes | Minimum | Equity volatility | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.05 0.06
– equity-linked notes | Minimum | Equity correlation | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.10 0.15
– equity-linked notes | Maximum | Equity volatility | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.67 0.70
– equity-linked notes | Maximum | Equity correlation | Model – Option model    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 1 1
securitisation swaps | Minimum | Prepayment rate | Model – Discounted cash flow | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.05 0.05
securitisation swaps | Maximum | Prepayment rate | Model – Discounted cash flow | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.10 0.10
long-dated swaptions | Minimum | Interest rate volatility | Model – Option model | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.09 0.09
long-dated swaptions | Maximum | Interest rate volatility | Model – Option model | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.30 0.30
FX options | Minimum | FX volatility | Model – Option model | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.01 0.01
FX options | Maximum | FX volatility | Model – Option model | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.19 0.26
long-dated single stock options | Minimum | Equity volatility | Model – Option model | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.05 0.06
long-dated single stock options | Maximum | Equity volatility | Model – Option model | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 1.19 1.18
total return swaps | Minimum | Price | Market proxy | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 73 0
total return swaps | Maximum | Price | Market proxy | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 106 104
– repurchase agreements | Minimum | Interest rate volatility | Model – Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0 0
– repurchase agreements | Maximum | Interest rate volatility | Model – Discounted cash flow    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0.03 0.26
– bonds | Minimum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0 0
– bonds | Maximum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage   140
– loans and deposits | Minimum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 0 0
– loans and deposits | Maximum | Price | Market proxy    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Significant unobservable input, assets, percentage 111 103
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
Level 3 | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 1,000  
Financial liabilities 1,055  
Level 3 | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 547  
Financial liabilities 470  
Level 3 | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 819  
Financial liabilities 1,494  
Level 3 | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 260  
Financial liabilities 650  
Level 3 | Other risk    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 8  
Financial liabilities 2  
Level 3 | Private equity including strategic investments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 1 1
Level 3 | Asset-backed securities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 0 0
Level 3 | – collateralised loan/debt obligation    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 0  
Level 3 | – other ABSs    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 0  
Level 3 | Loans held for securitisation    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 0  
Level 3 | Structured notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 9,017 9,113
Level 3 | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 6,250  
Level 3 | – foreign exchange (‘FX’)-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 993  
Level 3 | – other structured notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 1,774  
Level 3 | Other derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 3,671 2,842
Level 3 | securitisation swaps | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 324  
Level 3 | long-dated swaptions | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 91  
Level 3 | – other | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 640  
Level 3 | – other | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 221  
Level 3 | – other | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 945  
Level 3 | – other | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 123  
Level 3 | FX options | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 249  
Level 3 | long-dated single stock options | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 549  
Level 3 | total return swaps | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 527  
Level 3 | Other portfolios    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 49 787
Level 3 | – repurchase agreements    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 0  
Level 3 | – bonds    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 39  
Level 3 | – loans and deposits    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 0  
Level 3 | – other    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities 10  
Level 3 | Private equity including strategic investments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 19,951 18,258
Level 3 | Asset-backed securities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 331 380
Level 3 | – collateralised loan/debt obligation    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 99  
Level 3 | – other ABSs    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 232  
Level 3 | Loans held for securitisation    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0  
Level 3 | Structured notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0 $ 3
Level 3 | – equity-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0  
Level 3 | – foreign exchange (‘FX’)-linked notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0  
Level 3 | – other structured notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0  
Level 3 | Other derivatives    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 2,634  
Level 3 | securitisation swaps | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 143  
Level 3 | long-dated swaptions | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 89  
Level 3 | other | Interest rate    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 768  
Level 3 | other | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 229  
Level 3 | other | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 398  
Level 3 | other | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 47  
Level 3 | FX options | Foreign exchange    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 318  
Level 3 | long-dated single stock options | Equities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 421  
Level 3 | total return swaps | Credit    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 213  
Level 3 | Other portfolios    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 11,651  
Level 3 | – repurchase agreements    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 427  
Level 3 | – bonds    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 6,807  
Level 3 | – loans and deposits    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 2,412  
Level 3 | – other    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets $ 2,005