Taxation - Unused tax losses and tax credits (Details) - EUR (€) € in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|---|
| Taxation | |||
| Provision for potential tax liability | € 312 | € 314 | |
| Losses for which a deferred tax asset is recognised | € 76,046 | 78,113 | |
| Losses for which no deferred tax is recognised | 53,999 | 56,483 | |
| Total unused tax losses or tax credits | 130,045 | 134,596 | |
| Within 0 to 5 years | |||
| Taxation | |||
| Losses for which a deferred tax asset is recognised | 96 | 68 | |
| Losses for which no deferred tax is recognised | 104 | 98 | |
| Total unused tax losses or tax credits | 200 | 166 | |
| Beyond 6 years | |||
| Taxation | |||
| Losses for which no deferred tax is recognised | 16,010 | 15,982 | |
| Total unused tax losses or tax credits | 16,010 | 15,982 | |
| Unlimited | |||
| Taxation | |||
| Losses for which a deferred tax asset is recognised | 75,950 | 78,045 | |
| Losses for which no deferred tax is recognised | 37,885 | 40,403 | |
| Total unused tax losses or tax credits | € 113,835 | € 118,448 |