Employee compensation and benefits - Reconciliation of total incentive awards granted to income statement charge (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Employee Compensation And Benefits [Abstract] | |||
| Total incentive awards approved for the current year | $ 3,930 | $ 3,800 | $ 3,774 |
| Less: deferred bonuses awarded, expected to be recognised in future periods | (430) | (381) | (353) |
| Total incentives awarded and recognised in the current year | 3,500 | 3,419 | 3,421 |
| Add: current year charges for deferred bonuses from previous years | 478 | 439 | 375 |
| Other | (11) | (97) | (56) |
| Income statement charge for incentive awards | $ 3,967 | $ 3,761 | $ 3,740 |