Cash flow statement - Schedule of Change in Operating Liabilities (Details) - GBP (£) £ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of cash flow statement [Abstract] | |||
| Change in deposits from banks | £ (376) | £ 4 | £ (1,110) |
| Change in customer deposits | 13,858 | 11,324 | (3,850) |
| Change in repurchase agreements | 810 | 57 | (10,893) |
| Change in financial liabilities at fair value through profit or loss | 172 | 2,619 | 6,925 |
| Change in derivative financial instruments | (5,216) | 1,524 | (3,893) |
| Change in debt securities in issue at amortised cost | 7,725 | (4,824) | 2,094 |
| Change in insurance contracts | 13,220 | 1,941 | 9,845 |
| Change in investment contract liabilities | 10,412 | 6,250 | 5,502 |
| Change in other operating liabilities | (5,202) | 4,708 | (388) |
| Change in operating liabilities | 35,403 | 23,603 | 4,232 |
| (Decrease) increase in lease liabilities | £ (235) | £ (371) | £ 315 |