v3.26.1
Shareholders' Equity - Summary of Shareholders' Equity (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of shareholders equity [line items]      
Beginning balance € 9,313 € 9,554 € 10,935
Net income 977 688 (179)
Foreign currency translation differences and movement in foreign investment hedging reserves (447) 224 (85)
Changes in revaluation reserve real estate held for own use 1 (1) (2)
Other 6 (5) 0
Total other comprehensive income(loss) 412 573 421
Issuance and purchase of treasury shares (510) (887) (1,052)
Dividends paid on common shares (596) (521) (495)
Dividend withholding tax reduction 1 3 1
Coupons on perpetual securities (53) (77) (48)
Incentive plans 22 10 (3)
Ending balance 9,495 9,313 9,554
Share capital [member]      
Disclosure of shareholders equity [line items]      
Beginning balance 7,094 7,118 7,172
Shares withdrawn (12) (24) (54)
Ending balance 7,082 7,094 7,118
Retained earnings [member]      
Disclosure of shareholders equity [line items]      
Beginning balance 3,949 4,753 7,103
Other 23 (5)  
Total other comprehensive income(loss) 40 (5) (625)
Shares withdrawn 12 24 54
Issuance and purchase of treasury shares (510) (887) (1,052)
Dividends paid on common shares (596) (521) (495)
Dividend withholding tax reduction 1 3 1
Coupons on perpetual securities (53) (77) (48)
Incentive plans 28 31 5
Ending balance 3,792 3,949 4,753
Remeasurement of defined benefit Plans of group companies [member]      
Disclosure of shareholders equity [line items]      
Beginning balance (1,072) (1,006) (890)
Foreign currency translation differences and movement in foreign investment hedging reserves 101 (60) 14
Total other comprehensive income(loss) 106 (66) (116)
Ending balance (966) (1,072) (1,006)
Aegon Ltd. [member]      
Disclosure of shareholders equity [line items]      
Beginning balance 7,215 7,475  
Net Income 2024 Retained 0    
Net result 2024 recognized in the income statement   688  
Net result 2025 recognized in the income statement 977    
Net income 977 688 (179)
Foreign currency translation differences and movement in foreign investment hedging reserves (849) 464  
Changes in revaluation in subsidiaries 1,205 65  
Changes in revaluation reserve real estate held for own use   (1)  
Remeasurement of defined benefit plans of group companies 5 (5)  
Changes and transfer to legal reserve 59 47  
Other 6 (5)  
Total other comprehensive income(loss) 425 564  
Shares withdrawn 0    
Issuance and purchase of treasury shares (510) (887)  
Dividends paid on common shares (596) (521)  
Dividend withholding tax reduction 1 3  
Coupons on perpetual securities (53) (77)  
Incentive plans (28) (31)  
Ending balance 7,432 7,215 7,475
Aegon Ltd. [member] | Share capital [member]      
Disclosure of shareholders equity [line items]      
Beginning balance 241 265  
Net Income 2024 Retained 0    
Net result 2025 recognized in the income statement 0    
Net income 0    
Foreign currency translation differences and movement in foreign investment hedging reserves 0    
Changes in revaluation in subsidiaries 0    
Remeasurement of defined benefit plans of group companies 0    
Changes and transfer to legal reserve 0    
Other 0    
Total other comprehensive income(loss) 0    
Shares withdrawn (12) (24)  
Issuance and purchase of treasury shares 0    
Dividends paid on common shares 0    
Incentive plans 0    
Ending balance 229 241 265
Aegon Ltd. [member] | Paid-in surplus [member]      
Disclosure of shareholders equity [line items]      
Beginning balance 6,853 6,853  
Net Income 2024 Retained 0    
Net result 2025 recognized in the income statement 0    
Net income 0    
Foreign currency translation differences and movement in foreign investment hedging reserves 0    
Changes in revaluation in subsidiaries 0    
Remeasurement of defined benefit plans of group companies 0    
Changes and transfer to legal reserve 0    
Other 0    
Total other comprehensive income(loss) 0    
Shares withdrawn 0    
Issuance and purchase of treasury shares 0    
Dividends paid on common shares 0    
Incentive plans 0    
Ending balance 6,853 6,853 6,853
Aegon Ltd. [member] | Revaluation account [member]      
Disclosure of shareholders equity [line items]      
Beginning balance (6,022) (5,157)  
Net Income 2024 Retained 0    
Net result 2025 recognized in the income statement 0    
Net income 0    
Foreign currency translation differences and movement in foreign investment hedging reserves 0    
Changes in revaluation in subsidiaries 1,709 (863)  
Changes in revaluation reserve real estate held for own use   (1)  
Remeasurement of defined benefit plans of group companies 0    
Changes and transfer to legal reserve (8) 0  
Other (17)    
Total other comprehensive income(loss) 1,683 (865)  
Shares withdrawn 0    
Issuance and purchase of treasury shares 0    
Dividends paid on common shares 0    
Incentive plans 0    
Ending balance (4,338) (6,022) (5,157)
Aegon Ltd. [member] | Legal reserve FCTR [member]      
Disclosure of shareholders equity [line items]      
Beginning balance 999 474  
Net Income 2024 Retained 0    
Net result 2025 recognized in the income statement 0    
Net income 0    
Foreign currency translation differences and movement in foreign investment hedging reserves (950) 524  
Changes in revaluation in subsidiaries 0    
Remeasurement of defined benefit plans of group companies 0    
Changes and transfer to legal reserve 0 0  
Other 0    
Total other comprehensive income(loss) (950) 524  
Shares withdrawn 0    
Issuance and purchase of treasury shares 0    
Dividends paid on common shares 0    
Incentive plans 0    
Ending balance 49 999 474
Aegon Ltd. [member] | Legal reserve group companies [member]      
Disclosure of shareholders equity [line items]      
Beginning balance 1,367 1,134  
Net Income 2024 Retained 0    
Net result 2025 recognized in the income statement 0    
Net income 0 0  
Foreign currency translation differences and movement in foreign investment hedging reserves 0    
Changes in revaluation in subsidiaries 0    
Remeasurement of defined benefit plans of group companies 0    
Changes and transfer to legal reserve (129) 233  
Other 0 0  
Total other comprehensive income(loss) (129) 233  
Shares withdrawn 0 0  
Issuance and purchase of treasury shares 0 0  
Dividends paid on common shares 0 0  
Dividend withholding tax reduction   0  
Incentive plans 0 0  
Ending balance 1,239 1,367 1,134
Aegon Ltd. [member] | Retained earnings [member]      
Disclosure of shareholders equity [line items]      
Beginning balance 2,233 4,039  
Net Income 2023 Retained   (179)  
Net Income 2024 Retained 688    
Net result 2025 recognized in the income statement 0    
Net income 688 (179)  
Foreign currency translation differences and movement in foreign investment hedging reserves 0 0  
Changes in revaluation in subsidiaries 0    
Remeasurement of defined benefit plans of group companies 0 0  
Changes and transfer to legal reserve 196 (186)  
Other 23 (5)  
Total other comprehensive income(loss) 219 (191)  
Shares withdrawn 12 24  
Issuance and purchase of treasury shares (461) (835)  
Dividends paid on common shares (596) (521)  
Dividend withholding tax reduction 1 3  
Coupons on perpetual securities (53) (77)  
Incentive plans (28) (31)  
Ending balance 2,015 2,233 4,039
Aegon Ltd. [member] | Remeasurement of defined benefit Plans of group companies [member]      
Disclosure of shareholders equity [line items]      
Beginning balance (1,072) (1,006)  
Net Income 2024 Retained 0    
Net result 2025 recognized in the income statement 0    
Net income 0    
Foreign currency translation differences and movement in foreign investment hedging reserves 101 (60)  
Changes in revaluation in subsidiaries 0    
Remeasurement of defined benefit plans of group companies 5 (5)  
Changes and transfer to legal reserve 0    
Other 0    
Total other comprehensive income(loss) 106 (66)  
Shares withdrawn 0    
Issuance and purchase of treasury shares 0 0  
Dividends paid on common shares 0    
Incentive plans 0    
Ending balance (966) (1,072) (1,006)
Aegon Ltd. [member] | Treasury shares [member]      
Disclosure of shareholders equity [line items]      
Beginning balance (398) (346)  
Net Income 2023 Retained   0  
Net Income 2024 Retained 0    
Net result 2024 recognized in the income statement   0  
Net result 2025 recognized in the income statement 0    
Net income 0 0  
Foreign currency translation differences and movement in foreign investment hedging reserves 0    
Changes in revaluation in subsidiaries 0    
Remeasurement of defined benefit plans of group companies 0    
Changes and transfer to legal reserve 0    
Other 0    
Total other comprehensive income(loss) 0    
Shares withdrawn 0    
Issuance and purchase of treasury shares (49) (52)  
Dividends paid on common shares 0    
Incentive plans 0    
Ending balance (447) (398) (346)
Aegon Ltd. [member] | Net income /(loss) [member]      
Disclosure of shareholders equity [line items]      
Beginning balance 688 (179)  
Net Income 2023 Retained   179  
Net Income 2024 Retained (688)    
Net result 2024 recognized in the income statement   688  
Net result 2025 recognized in the income statement 977    
Net income 289 867  
Foreign currency translation differences and movement in foreign investment hedging reserves 0 0  
Changes in revaluation in subsidiaries 0 0  
Changes in revaluation reserve real estate held for own use   0  
Remeasurement of defined benefit plans of group companies 0 0  
Changes and transfer to legal reserve 0 0  
Other 0 0  
Total other comprehensive income(loss) 0 0  
Shares withdrawn 0 0  
Issuance and purchase of treasury shares 0 0  
Dividends paid on common shares 0 0  
Dividend withholding tax reduction   0  
Incentive plans 0 0  
Ending balance 977 688 (179)
Aegon Ltd. [member] | Legal reserves revaluation account [Member]      
Disclosure of shareholders equity [line items]      
Beginning balance 2,326 1,398  
Net Income 2024 Retained 0    
Net result 2025 recognized in the income statement 0    
Net income 0    
Foreign currency translation differences and movement in foreign investment hedging reserves 0 0  
Changes in revaluation in subsidiaries (504) 928  
Remeasurement of defined benefit plans of group companies 0    
Changes and transfer to legal reserve 0    
Other 0    
Total other comprehensive income(loss) (504) 928  
Shares withdrawn 0    
Issuance and purchase of treasury shares 0    
Dividends paid on common shares 0    
Incentive plans 0    
Ending balance € 1,821 € 2,326 € 1,398