Liquidity risk - Liabilities Arising From Insurance And Participating Investment Contracts Payable on demand (Details) - GBP (£) £ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of credit risk exposure [line items] | ||
| Total | £ 122,691 | £ 110,402 |
| Carrying amount [member] | ||
| Disclosure of credit risk exposure [line items] | ||
| Total | 118,931 | 107,909 |
| Life | ||
| Disclosure of credit risk exposure [line items] | ||
| Total | 122,691 | 110,402 |
| Life | Carrying amount [member] | ||
| Disclosure of credit risk exposure [line items] | ||
| Total | 118,931 | 107,909 |
| Non-life | ||
| Disclosure of credit risk exposure [line items] | ||
| Total | 0 | 0 |
| Non-life | Carrying amount [member] | ||
| Disclosure of credit risk exposure [line items] | ||
| Total | £ 0 | £ 0 |