Staff expenses - Summary of number of employees (Details) - eMPLOYEE |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |||
| Total average number of internal employees at full time equivalent basis | 62,770 | 61,121 | 59,434 |
| Netherlands | |||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |||
| Total average number of internal employees at full time equivalent basis | 15,280 | 14,821 | 14,449 |
| Rest of the world | |||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |||
| Total average number of internal employees at full time equivalent basis | 47,490 | 46,301 | 44,985 |