XML 145 R315.htm IDEA: XBRL DOCUMENT
v3.20.1

Defined Benefit Plans - Summary of Defined Benefit Plans (Detail) - EUR (€) € in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2018 | [1] | Dec. 31, 2017
--- | --- | --- | --- | --- | ---
Disclosure of defined benefit plans [Line Items] |  |  |  |  |
Defined benefit plans | € 4,359 | € 3,989 |  |  | € 3,950
Defined benefit assets | 1 |  |  | € 55 |
Defined benefit liabilities | 4,360 | 3,989 | [1] | € 4,005 |
Retirement Benefit Plans [member] |  |  |  |  |
Disclosure of defined benefit plans [Line Items] |  |  |  |  |
Defined benefit plans | 4,076 | 3,714 |  |  | 3,657
Other Post Employment Benefit Plans [member] |  |  |  |  |
Disclosure of defined benefit plans [Line Items] |  |  |  |  |
Defined benefit plans | 283 | 275 |  |  | € 293
Retirement benefit plans in surplus [member] |  |  |  |  |
Disclosure of defined benefit plans [Line Items] |  |  |  |  |
Defined benefit assets | 1 |  |  |  |
Retirement benefit plans in deficit [member] |  |  |  |  |
Disclosure of defined benefit plans [Line Items] |  |  |  |  |
Defined benefit liabilities | 4,077 | 3,714 |  |  |
Other post-employment benefit plans in deficit [member] |  |  |  |  |
Disclosure of defined benefit plans [Line Items] |  |  |  |  |
Defined benefit liabilities | € 283 | € 275 |  |  |
[1] | Amounts have been restated to reflect voluntary changes in accounting policies related to liability adequacy testing that was adopted by Aegon effective January 1, 2019. Refer to note 2.1.2 Voluntary changes in accounting policies for details about this change.

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_DisclosureOfDefinedBenefitPlansLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_140_a&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_LiabilityAssetOfDefinedBenefitPlans
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_RecognisedAssetsDefinedBenefitPlan
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of deficit in a defined benefit plan. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_RecognisedLiabilitiesDefinedBenefitPlan
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=aeg_RetirementBenefitPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=aeg_OtherPostEmploymentBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=aeg_RetirementBenefitPlansInSurplusMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=aeg_RetirementBenefitPlansInDeficitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=aeg_OtherPostemploymentBenefitPlansInDeficitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |