Net fee and commission income - Narrative (Details) - GBP (£) £ in Millions |
12 Months Ended | |
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Dec. 31, 2025 |
Dec. 31, 2024 |
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| NET FEE AND COMMISSION INCOME (Details) - Narrative [Line Items] | ||
| Receivables from contracts with customers | £ 174 | £ 163 |
| Transaction price allocated to remaining performance obligations | 207 | 195 |
| Current contract liabilities | 30 | 28 |
| Revenue from performance obligations satisfied or partially satisfied in previous periods | 0 | 0 |
| Services provided after balance sheet date | ||
| NET FEE AND COMMISSION INCOME (Details) - Narrative [Line Items] | ||
| Receivables from contracts with customers | £ 92 | £ 75 |
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- Definition The amount of current contract liabilities. [Refer: Contract liabilities] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer that is unconditional. A right to consideration is unconditional if only the passage of time is required before payment of that consideration is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of the transaction price allocated to the performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). [Refer: Performance obligations [domain]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Details
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