Other disclosures - Disclosure of leverage capital (Details) - EUR (€) € in Millions |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Other Disclosures | ||
| Tier 1 capital (EUR million) | € 96,673 | € 94,385 |
| Exposure (EUR million) | € 2,010,681 | € 1,924,349 |
| Leverage ratio | 4.81% | 4.90% |