Other reserves - Other reserves (Details) - GBP (£) £ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of reserves within equity [line items] | ||
| Other reserves | £ 693 | £ (468) |
| Currency translation reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | 2,054 | 3,625 |
| Fair value through other comprehensive income reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | (1,465) | (1,873) |
| Cash flow hedging reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | (1,210) | (2,930) |
| Own credit reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | (541) | (1,059) |
| Other reserves and treasury shares | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | £ 1,855 | £ 1,769 |