Earnings Per Share - Summary of Basic Earnings Per Share (Detail) - EUR (€) € / shares in Units, € in Millions, shares in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Earnings per share [line items] | |||
| Net result attributable to owners of Aegon Ltd. | € 977 | € 688 | € (179) |
| Coupons on perpetual securities | (53) | (77) | (48) |
| Net result attributable to owners for basic earnings per share calculation | 925 | 611 | (227) |
| Net result attributable to common shareholders | € 920 | € 608 | € (225) |
| Weighted average number of common shares outstanding (in million) | 1,553 | 1,630 | 1,879 |
| Basic earnings per common share (EUR per share) | € 0.59 | € 0.37 | € (0.12) |
| Common share B [member] | |||
| Earnings per share [line items] | |||
| Net result attributable to common shareholders | € 5 | € 4 | € (1) |
| Weighted average number of common shares outstanding (in million) | 345 | 380 | 490 |
| Basic earnings per common share (EUR per share) | € 0.01 | € 0.01 | € 0 |