Number of Employees - Additional Information (Detail) - Employees	Dec. 31, 2023	Dec. 31, 2022
Disclosure of number of employees [line items]
Number of employees employed	15,658	15,478
Aegon Ltd. [member]
Disclosure of number of employees [line items]
Number of employees employed	0

The number of personnel employed by the entity at a date.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2023-03-23

Name:	ifrs-full_NumberOfEmployees
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant