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Reinsurance Assets - Summary of Reinsurance Assets Relating to Non-life Insurance (Detail) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of types of insurance contracts [Line Items] |  |  |  |
Beginning balance | [1] | € 20,507 |  |
Ending balance |  | 20,835 | € 20,507 | [1]
Non-life insurance [member] |  |  |  |
Disclosure of types of insurance contracts [Line Items] |  |  |  |
Beginning balance |  | 1,356 | 1,327 |
Gross premium and deposits - existing and new business |  | 99 | 84 |
Unwind of discount / interest credited |  | 88 | 84 |
Insurance liabilities released |  | (127) | (123) |
Changes in unearned premiums |  | (30) | (28) |
Incurred related to current year |  | 80 | 77 |
Incurred related to prior years |  | 56 | 36 |
Release for claims settled current year |  | (23) | (18) |
Release for claims settled prior years |  | (124) | (130) |
Change in IBNR |  | (19) | 12 |
Shadow accounting adjustment |  |  | (24) |
Net exchange differences |  | 25 | 65 |
Other movements |  | (4) | (8) |
Ending balance |  | € 1,376 | € 1,356 |
[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.

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- Definition Increase decrease through other movements reinsurance assets. + References No definition available. + Details
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- Details
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