Receivables - Additional Information (Detail) - EUR (€) € in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of receivables [Line Items] | ||
| Income tax receivable | € 146 | € 286 |
| Aegon Ltd. [member] | ||
| Disclosure of receivables [Line Items] | ||
| Income tax receivable | € 18 | € 99 |
| Aegon Ltd. [member] | Top of range [member] | ||
| Disclosure of receivables [Line Items] | ||
| Receivables from group companies and other receivables, maturity | 1 year | 1 year |