Leases - Narrative (Details) £ in Millions |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2025
GBP (£)
lease
|
Dec. 31, 2024
GBP (£)
lease
|
|
| Leases [Line Items] | ||
| Lease, extension period | 91 years | 91 years |
| Number of leases with variable lease payment terms | lease | 37 | 38 |
| Number of leases | lease | 97 | 103 |
| Expense relating to variable lease payments not included in measurement of lease liabilities | £ 3,746 | £ 3,855 |
| Cash flow reduced for early termination option expected to be exercised | 0 | 9 |
| Cash flow increased for early extension option expected to be exercised | 1,780 | 1,859 |
| Barclays Bank PLC | ||
| Leases [Line Items] | ||
| Cash flow reduced for early termination option expected to be exercised | 0 | 9 |
| Cash flow increased for early extension option expected to be exercised | £ 49 | £ 14 |