Dividends on ordinary shares - Dividends on ordinary shares (Details) - GBP (£) £ / shares in Units, £ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Dividends [Abstract] | ||
| Dividends paid, ordinary shares per share (in GBP per share) | £ 0.0550 | £ 0.0530 |
| Dividends paid, ordinary shares | £ 791 | £ 796 |