Other Net Investment Result - Summary Of Other Investment Income Explanatory (Detail) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure Of Other Investment Income [Line Items] | |||
| Other investment income | € 825 | € 729 | € 550 |
| Dividend income [Member] | |||
| Disclosure Of Other Investment Income [Line Items] | |||
| Other investment income | 819 | 724 | 547 |
| Rental income [Member] | |||
| Disclosure Of Other Investment Income [Line Items] | |||
| Other investment income | € 6 | € 4 | € 3 |