Interest Charges and Related Fees - Summary of Interest Charges and Related Fees (Detail) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of interest charges and related fees [line items] | |||
| Subordinated borrowings | € 82 | € 99 | € 115 |
| Borrowings | 88 | 82 | € 58 |
| Aegon Ltd. [member] | |||
| Disclosure of interest charges and related fees [line items] | |||
| Subordinated borrowings | 38 | 53 | |
| Borrowings | 48 | 50 | |
| Derivatives | 7 | 19 | |
| Other | 3 | 7 | |
| Total | € 96 | € 129 | |