XML 190 R342.htm IDEA: XBRL DOCUMENT
v3.20.1

Fair Value - Schedule of Transfers between Level 1 and Level II for Financial Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - Recurring fair value measurement [member] - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [line items] |  |
Transfers Level I to Level II | € 20 | € 3
Transfers Level II to Level I | 19 | (3)
Available-for-sale financial assets [member] |  |
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [line items] |  |
Transfers Level I to Level II | 12 |
Transfers Level II to Level I | 3 |
Available-for-sale financial assets [member] | Debt securities [member] |  |
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [line items] |  |
Transfers Level I to Level II | 12 |
Transfers Level II to Level I | 3 |
Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] |  |
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [line items] |  |
Transfers Level I to Level II | 8 | 3
Transfers Level II to Level I | 16 | (3)
Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Shares [member] |  |
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [line items] |  |
Transfers Level I to Level II | 8 | 3
Transfers Level II to Level I | 8 | 1
Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investment contracts for account of policyholders [member] |  |
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [line items] |  |
Transfers Level II to Level I | € 8 | € (4)

X
- Definition Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value. + References No definition available. + Details
Name: | aeg_DisclosureOfTransfersBetweenLevel1AndLevel2ForFinancialAssetsAndLiabilitiesRecordedAtFairValueLineItems
Namespace Prefix: | aeg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Transfer out of level 2 into level 1 of fair value hierarchy assets. + References No definition available. + Details
Name: | aeg_TransferOutOfLevel2IntoLevel1OfFairValueHierarchyAssets
Namespace Prefix: | aeg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of transfers out of Level 1 and into Level 2 of the fair value hierarchy of assets held at the end of the reporting period. [Refer: Level 1 of fair value hierarchy [member]; Level 2 of fair value hierarchy [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2019-01-01 -Paragraph 93 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2019-en-r&anchor=para_93_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_MeasurementAxis=ifrs-full_RecurringFairValueMeasurementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAvailableforsaleCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ifrs-full_DebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValueCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=aeg_SharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=aeg_InvestmentsForAccountOfPolicyholdersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |