Customer deposits - Schedule of customer deposits (Details) - EUR (€) € in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Deposits from customers [abstract] | ||
| Current accounts / Overnight deposits | € 242,598 | € 238,940 |
| Savings accounts | 399,779 | 382,066 |
| Time deposits | 127,386 | 98,599 |
| Other | 3,527 | 1,768 |
| Customer deposits | € 773,291 | € 721,373 |
| X | ||||||||||
- Definition The amount of balances in customers' deposit accounts held by the entity that the entity does not separately disclose in the same statement or note. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The amount of deposit liabilities from customers held by the entity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Customer Deposits, Current Accounts And Overnight Deposits No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Customer Deposits, Time Deposits No definition available.
|