XML 257 R256.htm IDEA: XBRL DOCUMENT
v3.20.1

Deferred Expenses - Additional Information (Detail) - EUR (€) € in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure Of Deferred Acquisition Costs Arising From Insurance Contracts [line items] |  |
Deferred cost of reinsurance | € 389 | € 23
Canada Life Insurance [Member] |  |
Disclosure Of Deferred Acquisition Costs Arising From Insurance Contracts [line items] |  |
Deferred cost of reinsurance | € 360 |

X
- Definition Deferred cost of reinsurance. + References No definition available. + Details
Name: | aeg_DeferredCostOfReinsurance
Namespace Prefix: | aeg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disclosure Of Deferred Acquisition Costs Arising From Insurance Contracts [line items] + References No definition available. + Details
Name: | aeg_DisclosureOfDeferredAcquisitionCostsArisingFromInsuranceContractsLineItems
Namespace Prefix: | aeg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=aeg_CanadaLifeInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |