Summarised financial information - summarised equity information (Details) - GBP (£) £ in Millions |
Dec. 31, 2025 |
Jun. 30, 2025 |
Dec. 31, 2024 |
Jun. 30, 2024 |
Dec. 31, 2023 |
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| Disclosure Of Summarised Financial Information [Line Items] | |||||
| Total equity | £ 47,177 | £ 49,995 | £ 54,469 | £ 52,934 | |
| Share capital | 581 | 585 | 589 | ||
| Perpetual hybrid bonds | 1,685 | £ 1,685 | 1,685 | ||
| Parent Company | |||||
| Disclosure Of Summarised Financial Information [Line Items] | |||||
| Total equity | £ 37,238 | 34,433 | 33,665 | ||
| Share capital | 585 | 581 | 589 | ||
| Share premium | 121 | 123 | 119 | ||
| Perpetual hybrid bonds | 1,685 | 1,685 | 1,685 | ||
| Other Equity | £ 34,848 | £ 32,044 | £ 31,272 |
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- Definition Disclosure of summarised financial information. No definition available.
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- Definition Perpetual hybrid bonds. No definition available.
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- Definition The amount of residual interest in the assets of the entity after deducting all its liabilities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The nominal value of capital issued. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of equity interest of an entity without share capital that the entity does not separately disclose in the same statement or note. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount received or receivable from the issuance of the entity's shares in excess of nominal value. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Details
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