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, 2022	Dec. 31, 2021
Disclosure of investments for account of policyholders [Line Items]
Beginning balance	€ 563	€ 467
Additions	0	54
Subsequent expenditure capitalized	10	6
Disposals	(42)	(43)
Fair value gains / (losses)	(61)	46
Net exchange differences	(27)	32
Ending balance	€ 443	€ 563

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

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