Equity - Schedule of non-distributable reserves (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Disclosure of equity [Line Items] | |||
| Non-distributable reserves | € 6,225 | € 5,672 | € 6,727 |
| ING Bank | |||
| Disclosure of equity [Line Items] | |||
| Non-distributable reserves | 6,225 | 5,672 | 6,727 |
| Other | |||
| Disclosure of equity [Line Items] | |||
| Non-distributable reserves | € 0 | € 0 | € 0 |