XML 420 R382.htm IDEA: XBRL DOCUMENT
v3.20.1

Events After the Reporting Period - Additional Information (Detail) € in Millions, $ in Millions | Feb. 03, 2020 EUR (€) | Feb. 03, 2020 USD ($) | Jan. 29, 2020 EUR (€) | Jan. 08, 2019 EUR (€)
--- | --- | --- | --- | ---
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Business disposal gain (loss) |  |  |  | € 70
JAPAN | Disposal of major subsidiary [member] |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Business sold, business combination |  |  | € 153 |
Business disposal gain (loss) |  |  | € 51 |
Sale of interest percentage |  |  | 50.00% |
Transamerica [member] | Disposal of major subsidiary [member] |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Business consideration | € 635 | $ 711 |  |
Aegon N.V [member] | JAPAN | Disposal of major subsidiary [member] |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Business sold, business combination |  |  | € 153 |
Business disposal gain (loss) |  |  | € 51 |
Sale of interest percentage |  |  | 50.00% |
Aegon N.V [member] | Transamerica [member] | Disposal of major building [member] |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Business consideration | € 635 | $ 711 |  |

X
- Definition Business sold, business combination. + References No definition available. + Details
Name: | aeg_BusinessSoldBusinessCombination
Namespace Prefix: | aeg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gain (loss) on disposals of business. + References No definition available. + Details
Name: | aeg_GainLossOnDisposalsOfBusiness
Namespace Prefix: | aeg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of sale of minority interest. + References No definition available. + Details
Name: | aeg_PercentageOfSaleOfMinorityInterest
Namespace Prefix: | aeg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 40 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_40_a&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ConsiderationPaidReceived
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_JP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_DisposalOfMajorSubsidiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=aeg_TransamericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_OtherDisposalsOfAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |