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Fair Value - Information about Significant Unobservable Inputs (Parenthetical) (Detail) - EUR (€) € in Millions	Dec. 31, 2019	Dec. 31, 2018
Derivatives [member] | Level III [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Investments for account of policyholders	€ 1	€ 2

X

- Definition

Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]

+ References

No definition available.

+ Details

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- Definition

Investment for account of policyholders.

+ References

No definition available.

+ Details

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- Details

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- Details

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