Taxation - Unused tax losses and tax credits (Details) - EUR (€) € in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Taxation | ||
| Provision for potential tax liability | € 314 | € 445 |
| Losses for which a deferred tax asset is recognised | 78,113 | 80,244 |
| Losses for which no deferred tax is recognised | 56,483 | 56,344 |
| Total unused tax losses or tax credits | 134,596 | 136,588 |
| Within 0 to 5 years | ||
| Taxation | ||
| Losses for which a deferred tax asset is recognised | 68 | 20 |
| Losses for which no deferred tax is recognised | 98 | 313 |
| Total unused tax losses or tax credits | 166 | 333 |
| Beyond 6 years | ||
| Taxation | ||
| Losses for which a deferred tax asset is recognised | 0 | |
| Losses for which no deferred tax is recognised | 15,982 | 15,653 |
| Total unused tax losses or tax credits | 15,982 | 15,653 |
| Unlimited | ||
| Taxation | ||
| Losses for which a deferred tax asset is recognised | 78,045 | 80,224 |
| Losses for which no deferred tax is recognised | 40,403 | 40,378 |
| Total unused tax losses or tax credits | € 118,448 | € 120,602 |