v3.26.1
Provisions - Additional Information (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Jul. 21, 2023
Disclosure of other provisions [Line Items]      
Litigation provisions € 81 € 7  
Provisions 97 98 € 83
Aegon Ltd. [member]      
Disclosure of other provisions [Line Items]      
Provisions € 76 12  
Description of expected timing of outflows provisions The provision is non-current and is expected to be used within 5 years    
Restructuring provisions [member]      
Disclosure of other provisions [Line Items]      
Provisions € 2 67  
Restructuring provisions [member] | Aegon Ltd. [member]      
Disclosure of other provisions [Line Items]      
Provisions 74 0  
Other provisions [member]      
Disclosure of other provisions [Line Items]      
Provisions € 13 € 24