Employee compensation and benefits - HSBC share option plans (Details) - Savings-related Share Option Plans - GBP (£) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Employee monthly savings | £ 500 | |
| Term of options granted for share-based payment arrangements | 6 months | |
| Exercise price discount | 20.00% | 20.00% |
| Minimum | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Award vesting period | 3 years | |
| Maximum | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Award vesting period | 5 years | |