Other disclosures - Foreclosed real estate assets (Details) - EUR (€) € in Millions	Jun. 30, 2026	Dec. 31, 2025
Disclosure of detailed information about investment property [line items]
Investments accounted for using equity method	€ 7,722	€ 7,052
Foreclosed properties \| Spain
Disclosure of detailed information about investment property [line items]
Investments accounted for using equity method	22
Foreclosed equity instruments \| Spain
Disclosure of detailed information about investment property [line items]
Investments accounted for using equity method	€ 9

- Definition

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]]

+ References + Details