Shares in Group Companies - Summary of Shares in Group Companies (Detail) - Aegon N.V [member] - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of interests in other entities [Line Items]
At January 1	€ 24,846	€ 25,037
Capital contributions and acquisitions	65	96
Dividend received	(1,196)	(735)
Net result for the financial year	2,119	0	€ 1,376
Revaluations	209	448
At December 31	€ 26,042	€ 24,846	€ 25,037

The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

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