Grupo Santander - Agreement for the sale of the stake in Caceis (Details) - EUR (€) € in Millions |
6 Months Ended | ||
|---|---|---|---|
Dec. 19, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Disclosure of detailed information about business combination [line items] | |||
| Gains or losses on non-current assets held for sale not classified as discontinued operations | € 217 | € (31) | |
| Crédit Agricole S.A. | Caceis | |||
| Disclosure of detailed information about business combination [line items] | |||
| Proportion of ownership interest in subsidiary (in percentage) | 100.00% | ||
| Caceis | |||
| Disclosure of detailed information about business combination [line items] | |||
| Proportion of ownership interest in associate, sold (in percentage) | 30.50% | ||
| Gains or losses on non-current assets held for sale not classified as discontinued operations | € 231 | ||