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Other Charges - Summary of Other Charges (Detail) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of other charges [abstract] |  |  |
Other charges | € 1 | € 375 | € 235

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- Definition Disclosure of other charges. + References No definition available. + Details
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Namespace Prefix: | aeg_
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Balance Type: | na
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- Definition Other charges. + References No definition available. + Details
Name: | aeg_OtherCharges
Namespace Prefix: | aeg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration