Other reserves - Other reserves (Details) - GBP (£) £ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of reserves within equity [line items] | ||
| Other reserves | £ (953) | £ (1,302) |
| Currency translation reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | 2,038 | 3,690 |
| Fair value through other comprehensive income reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | (1,316) | (1,681) |
| Cash flow hedging reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | (1,333) | (2,448) |
| Own credit reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | (540) | (1,059) |
| Other reserves | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | £ 198 | £ 196 |