v3.26.1
Income Taxes - Additional Information (Detail)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Income tax expense benefits [line items]    
Weighted average applicable statutory tax rate 17.90% 18.00%
Other tax rate effects for reconciliation between accounting profit and tax expense (income) 23.70% 24.90%
Aegon Ltd. [member]    
Income tax expense benefits [line items]    
Weighted average applicable statutory tax rate 25.80% 25.80%
Average effective tax rate 5.00% 14.00%