v3.26.1
Subordinated Borrowings - Summary of Subordinated Borrowings (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of subordinated liabilities [Line Items]    
Subordinated borrowings € 1,461 € 1,653
Subordinated borrowings [member]    
Disclosure of subordinated liabilities [Line Items]    
Fair value of subordinated borrowings 1,312 1,490
Aegon Ltd. [member]    
Disclosure of subordinated liabilities [Line Items]    
Subordinated borrowings 680 770
Fair value of subordinated borrowings € 692 763
USD 800 million fixed floating subordinated notes [member]    
Disclosure of subordinated liabilities [Line Items]    
Coupon rate [1] 5.50%  
Coupon date Semi-annually, April 11  
Year of issue 2018  
Year of maturity 2048  
Year of next call 2028  
Subordinated borrowings € 680 770
USD 800 million fixed floating subordinated notes [member] | Aegon Ltd. [member]    
Disclosure of subordinated liabilities [Line Items]    
Coupon rate [1] 5.50%  
Coupon date Semi-annually, April 11  
Year of issue 2018  
Year of maturity 2048  
Year of next call 2028  
Subordinated borrowings € 680 770
USD 925 million fixed subordinated notes [member]    
Disclosure of subordinated liabilities [Line Items]    
Coupon rate [2] 5.10%  
Coupon date [2] Quarterly, March 15  
Year of issue [2] 2019  
Year of maturity [2] 2049  
Year of next call [2] 2026  
Subordinated borrowings [2] € 781 € 883
[1] The coupon is fixed at 5.5% until the first call date in 2028 and floating thereafter with a 6-month USD LIBOR (subject to US LIBOR Act) plus a margin of 3.539%.
[2] Issued by a subsidiary of, and guaranteed by Aegon Ltd.