Net trading income (Details) - GBP (£) £ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of detailed information about financial instruments [line items] | |||
| Net trading income | £ 7,104 | £ 5,900 | £ 5,980 |
| Net gains on financial instruments held for trading | Liabilities held for trading | |||
| Disclosure of detailed information about financial instruments [line items] | |||
| Net trading income | 5,160 | 4,201 | 4,310 |
| Net gains on financial instruments mandatorily at fair value | |||
| Disclosure of detailed information about financial instruments [line items] | |||
| Net trading income | 1,325 | 1,199 | 1,308 |
| Net gains on financial instruments designated at fair value | Liabilities designated at fair value | |||
| Disclosure of detailed information about financial instruments [line items] | |||
| Net trading income | £ 619 | £ 500 | £ 362 |