v3.26.1
Income Taxes - Summary of the Components of Income Tax for Period (Income) / Charge (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Current tax      
Current year € (58) € (19) € (4)
Adjustments to prior years 16 20 9
Total current tax (42) 1 5
Deferred tax      
(Origination) / reversal of temporary differences 12 31 247
Changes in tax rates / bases (3)   (1)
Changes in deferred tax assets [1] 9   (9)
Reconciliation between standard and effective tax      
Result before tax 1,045 660 (391)
Non-recognition of deferred tax assets (61) 13 (61)
Adjustments to prior years 20 (29) 27
Non-tax-deductible expenses (9) (12) (12)
Total deferred tax (22) 15 204
Income tax benefit / (charge) (65) 16 209
Aegon Ltd. [member]      
Current tax      
Current year 10 19  
Total current tax 10 19  
Reconciliation between standard and effective tax      
Result before tax (217) (137) € (133)
Tax on result at Dutch corporate result tax rate 56 35  
Non-recognition of deferred tax assets (53) (11)  
Adjustments to prior years 11 1  
Non-tax-deductible expenses (4) (7)  
Income tax benefit / (charge) € 10 € 19  
[1] Changes due to recognition / write off of previously not recognized / recognized tax losses, tax credits, and deductible temporary differences.