Trading portfolio (Details) - GBP (£) £ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of detailed information about financial instruments [line items] | ||
| Trading portfolio assets | £ 189,743 | £ 166,244 |
| Trading Portfolio Liabilities | (56,829) | (56,182) |
| Debt securities and other eligible bills | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Trading portfolio assets | 94,040 | 77,805 |
| Trading Portfolio Liabilities | (32,309) | (36,324) |
| Equity securities | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Trading portfolio assets | 83,243 | 74,859 |
| Trading Portfolio Liabilities | (24,520) | (19,858) |
| Traded loans | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Trading portfolio assets | 12,249 | 13,470 |
| Commodities | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Trading portfolio assets | £ 211 | £ 110 |