Other reserves - Narrative (Details) - GBP (£) £ in Millions, shares in Millions |
12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Disclosure of reserves within equity [line items] | ||||||||||||
| Share buyback | £ (1,710) | £ (2,011) | £ (1,993) | |||||||||
| Shares cancelled under share buyback programme (see below) | 1,710 | 2,011 | 1,993 | |||||||||
| Capital redemption reserve | ||||||||||||
| Disclosure of reserves within equity [line items] | ||||||||||||
| Share buyback | £ 220 | £ 369 | £ 438 | |||||||||
| Retained profits £m | ||||||||||||
| Disclosure of reserves within equity [line items] | ||||||||||||
| Number of treasury shares cancelled (in shares) | 2,204 | 3,686 | 4,386 | |||||||||
| Share buyback | £ (1,710) | [1] | £ (2,011) | [2] | £ (1,993) | [3] | ||||||
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