XML 364 R373.htm IDEA: XBRL DOCUMENT
v3.20.1

Share Capital - Movement of Common Shares (Detail) shares in Thousands, € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 EUR (€) shares | Dec. 31, 2018 EUR (€) shares | Dec. 31, 2017 EUR (€) shares
Disclosure of changes in share capital [Line Items] |  |  |
Beginning balance | shares | 76,419 | 80,996 |
Dividend | shares |  |  |
Ending balance | shares | 91,893 | 76,419 | 80,996
Beginning balance | € 322 |  |
Ending balance | 323 | € 322 |
Common shares [member] |  |  |
Disclosure of changes in share capital [Line Items] |  |  |
Beginning balance | 251 | 251 | € 249
Dividend | 1 |  | 3
Ending balance | € 253 | € 251 | € 251
Common shares [member] | Aegon N.V [member] |  |  |
Disclosure of changes in share capital [Line Items] |  |  |
Beginning balance | shares | 2,095,648 | 2,095,648 |
Dividend | shares | 9,491 |  |
Ending balance | shares | 2,105,139 | 2,095,648 | 2,095,648
Beginning balance | € 251 | € 251 |
Dividend | 1 |  |
Ending balance | 253 | 251 | € 251
Common share B [member] |  |  |
Disclosure of changes in share capital [Line Items] |  |  |
Beginning balance | 70 | 70 | 70
Ending balance | € 70 | € 70 | € 70
Common share B [member] | Aegon N.V [member] |  |  |
Disclosure of changes in share capital [Line Items] |  |  |
Beginning balance | shares | 585,022 | 585,022 |
Dividend | shares | 0 |  |
Ending balance | shares | 585,022 | 585,022 | 585,022
Beginning balance | € 70 | € 70 |
Dividend | 0 |  |
Ending balance | € 70 | € 70 | € 70

X
- Definition Disclosure Of Changes In Share Capital [line items] + References No definition available. + Details
Name: | aeg_DisclosureOfChangesInShareCapitalLineItems
Namespace Prefix: | aeg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Dividends paid in ordinary shares value. + References No definition available. + Details
Name: | aeg_DividendsPaidInOrdinarySharesValue
Namespace Prefix: | aeg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of dividend shares. + References No definition available. + Details
Name: | aeg_NumberOfDividendShares
Namespace Prefix: | aeg_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share capital par value. + References No definition available. + Details
Name: | aeg_ShareCapitalParValue
Namespace Prefix: | aeg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 79 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_iv&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfSharesOutstanding
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
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_ClassesOfShareCapitalAxis=aeg_CommonBSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |