Defined Benefit Plans - Summary of Actuarial Assumptions Used to Determine Defined Benefit Obligations (Detail)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Aegon United Kingdom [member]
Demographic actuarial assumptions
Mortality	UK mortality table	UK mortality table
Financial actuarial assumptions
Discount rate	4.96%	1.79%
Price inflation	3.20%	3.34%
United States [member]
Demographic actuarial assumptions
Mortality	US mortality table	US mortality table
Financial actuarial assumptions
Salary increase rate	4.00%	4.00%
Health care trend rate	6.30%	6.10%
United States [member] \| Top of range [member]
Financial actuarial assumptions
Discount rate	5.14%	2.61%
United States [member] \| Bottom of range [member]
Financial actuarial assumptions
Discount rate	5.22%	2.80%

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- Definition

Disclosure of demographic actuarial assumptions.

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No definition available.

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- Definition

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2022-03-24
-Paragraph 144
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_144&doctype=Standard
-URIDate 2022-03-24

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- Definition

The expected rate of inflation that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]]

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- Definition

The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]]

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- Definition

Medical cost trend rate used as significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

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No definition available.

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