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Other Equity Instruments - Summary of Coupon (Detail) - USD 500 million [member] - Perpetual contingent convertible securities [member] | 12 Months Ended
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Dec. 31, 2019
Disclosure of other equity instruments [line items] |
Coupon date | Semi-annually, April 15
Aegon N. V. and subsidiaries [member] |
Disclosure of other equity instruments [line items] |
Coupon date | Semi-annually, April 15

X
- Definition Coupon as of date. + References No definition available. + Details
Name: | aeg_CouponAsOfDate
Namespace Prefix: | aeg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items of other equity instruments. + References No definition available. + Details
Name: | aeg_DisclosureOfOtherEquityInstrumentsLineItems
Namespace Prefix: | aeg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=aeg_RangeOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=aeg_PerpetualContingentConvertibleSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=aeg_AegonNvAndSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |