Investments for Account of Policyholders - Summary of Investments in Real Estate for Account of Policyholders (Detail) - Investments in real estate [member] - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Disclosure of investments for account of policyholders [Line Items]
Beginning balance	€ 655	€ 686
Additions		7
Subsequent expenditure capitalized	2	3
Disposals	(43)	(53)
Fair value gains / (losses)	5	38
Net exchange differences	(7)	(26)
Ending balance	€ 612	€ 655

Additions from investments for account of policyholders at fair value financial assets

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- Definition

Disclosure of investments for account of policyholders.

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- Definition

Disposals of investments for account of policyholders at fair value financial assets.

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- Definition

Fair value gains losses of investments for account of policyholders at fair value financial assets.

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- Definition

Investments for account of policyholders financial assets at fair value through profit or loss, excluding derivatives and including investments in real estate

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- Definition

Net exchange differences of investments for account of policyholders at fair value financial assets.

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- Definition

Subsequent expenditure capitalized investments for account of policyholders at fair value financial assets.

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