Dividends - Schedule of dividends to shareholders (Details) - GBP (£) £ / shares in Units, £ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Summary Of Dividends [Line Items] | |||
| Cash dividends paid (in GBP per share) | £ 0.4723 | £ 0.5496 | £ 0.5700 |
| Cash dividend | £ 1,623 | £ 1,529 | £ 1,718 |
| Scrip dividend | £ 697 | £ 702 | £ 376 |
| Final dividend in respect of the prior year | |||
| Summary Of Dividends [Line Items] | |||
| Cash dividends paid (in GBP per share) | £ 0.3088 | £ 0.3912 | £ 0.3760 |
| Cash dividend | £ 894 | £ 811 | £ 1,325 |
| Scrip dividend | £ 617 | £ 643 | £ 56 |
| Interim dividend in respect of the current year | |||
| Summary Of Dividends [Line Items] | |||
| Cash dividends paid (in GBP per share) | £ 0.1635 | £ 0.1584 | £ 0.1940 |
| Cash dividend | £ 729 | £ 718 | £ 393 |
| Scrip dividend | £ 80 | £ 59 | £ 320 |