Non-current assets and disposal groups held for sale (Detail: Text Values) - EUR (€) € in Millions |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2026 |
Dec. 31, 2025 |
|
| Non current assets held for sale [Line Items] | ||||||
| Non-current assets or disposal groups classified as held for sale | € 2,700 | € 2,700 | € 35 | |||
| Liabilities included in disposal groups classified as held for sale | 1,600 | 1,600 | 0 | |||
| Unrealized net gains (losses) arising during the period, before tax | 0 | € 0 | 0 | € 0 | 0 | |
| Deposits | 700,894 | 700,894 | € 694,580 | |||
| Provision for sale of disposal group | ||||||
| Non current assets held for sale [Line Items] | ||||||
| New provisions, other provisions | 70 | |||||
| Disposal groups classified as held for sale | ||||||
| Non current assets held for sale [Line Items] | ||||||
| Loans | 2,700 | 2,700 | ||||
| Deposits | € 1,600 | € 1,600 | ||||
| Disposal groups classified as held for sale | Forecast | ||||||
| Non current assets held for sale [Line Items] | ||||||
| Gains (losses) on disposals of other non-current assets | € (100) | |||||