Condensed Financial Information of Registrant - Additional Information (Detail) - Aegon Ltd. [member] - Business combinations [member] - EUR (€) € in Billions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Condensed financial information of registrant [line items] | ||
| Dividends | € 1.1 | € 1.1 |
| Capital contributions | € 0.8 | € 0.1 |