Derivative Financial Instruments and Hedge Accounting - Disclosure of Derivative Financial Assets and Liabilities Subject to Offsetting Arrangements (Detail) - GBP (£) £ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Disclosure of derivative financial asset and liabilities offsetting arrangements [line items] | ||
| Gross derivative assets | £ 16 | £ 51 |
| Gross derivative liabilities | (3) | (58) |
| Net derivative assets/ liabilities | 13 | (7) |
| Asset position [member] | ||
| Disclosure of derivative financial asset and liabilities offsetting arrangements [line items] | ||
| Gross derivative assets | 16 | 24 |
| Gross derivative liabilities | (3) | (7) |
| Net derivative assets/ liabilities | 13 | 17 |
| Counterparties in a liability position [member] | ||
| Disclosure of derivative financial asset and liabilities offsetting arrangements [line items] | ||
| Gross derivative assets | 0 | 27 |
| Gross derivative liabilities | 0 | (51) |
| Net derivative assets/ liabilities | £ 0 | £ (24) |
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- Definition The amount of financial assets set off against financial liabilities when an entity: (a) currently has a legally enforceable right to set off the recognised amounts; and (b) intends either to settle on a net basis, or to realise the asset and settle the liability simultaneously. [Refer: Financial assets; Financial liabilities] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The gross amount of recognised financial assets that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement. [Refer: Financial assets] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of financial liabilities set off against financial assets when an entity: (a) currently has a legally enforceable right to set off the recognised amounts; and (b) intends either to settle on a net basis or to realise the asset and settle the liability simultaneously. [Refer: Financial assets; Financial liabilities] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The gross amount of recognised financial liabilities that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement. [Refer: Financial liabilities] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The net amount of financial assets that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement, presented in the statement of financial position. [Refer: Financial assets] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items representing derivative financial asset and liabilities offsetting arrangements line items. No definition available.
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- Definition Net financial assets liabilities subject to offsetting enforceable master netting arrangements or similar agreements in statement of financial position. No definition available.
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