Corporate Information And Statement Of Ifrs Compliance [Abstract]
| Concept | 2024-01-01 to 2024-12-31 | 
|---|---|
| Corporate information and statement of IFRS compliance [abstract] | |
| Name of reporting entity or other means of identification | 
                                                ASR Nederland N.V.
                                                
                                             | 
| Domicile of entity | 
                                                the Netherlands
                                                
                                             | 
| Legal form of entity | 
                                                public limited company
                                                
                                             | 
| Country of incorporation | 
                                                the Netherlands
                                                
                                             | 
| Address of entity's registered office | 
                                                Archimedeslaan 10, 3584 BA
                                                
                                             | 
| Principal place of business | 
                                                Utrecht
                                                
                                             | 
| Description of nature of entity's operations and principal activities | 
                                                in the fields of insurance, pensions, and mortgages for customers, businesses and employers. a.s.r. is also active as an asset manager for third parties.
                                                
                                             | 
| Name of ultimate parent of group | 
                                                ASR Nederland N.V.
                                                
                                             | 
| Statement of IFRS compliance [text block] | 
                                                7.1.2
                                                
                                             | 
| Disclosure of reclassifications or changes in presentation [text block] | 
                                                7.3.1
                                                
                                             | 
| Disclosure of material accounting policy information [text block] |  | 
| Disclosure of objectives, policies and processes for managing capital [text block] | 
                                                7.9.1
                                                
                                             | 
| Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners | 
                                                409,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share | 
                                                1.96
                                                
                                             |