Results From Financial Transactions - Summary of Realized Gains and Losses on Financial Investments (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	[1]	Dec. 31, 2020	[1]
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	€ (537)	€ 392		€ 119
Shares [member]
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	67	16		(2)
Debt securities and money market investments [member]
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	(632)	281		144
Loans [member]
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	36	125		20
Other [member]
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	€ (8)	€ (30)		€ (43)

[1] Amounts for 2021 and 2020 have been re-presented to reflect the classification of Aegon the Netherlands as held for sale and discontinued operations, refer to note 51 Discontinued operations.