Provisions - Additional Information (Detail) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Jul. 21, 2023 |
|
| Disclosure of other provisions [Line Items] | |||
| Litigation provisions | € 81 | € 7 | |
| Provisions | 97 | 98 | € 83 |
| Aegon Ltd. [member] | |||
| Disclosure of other provisions [Line Items] | |||
| Provisions | € 76 | 12 | |
| Description of expected timing of outflows provisions | The provision is non-current and is expected to be used within 5 years | ||
| Restructuring provisions [member] | |||
| Disclosure of other provisions [Line Items] | |||
| Provisions | € 2 | 67 | |
| Restructuring provisions [member] | Aegon Ltd. [member] | |||
| Disclosure of other provisions [Line Items] | |||
| Provisions | 74 | 0 | |
| Other provisions [member] | |||
| Disclosure of other provisions [Line Items] | |||
| Provisions | € 13 | € 24 |