Other disclosures - Disclosure of financing for construction and real estate business in Spain, memorandum items (Details) - EUR (€) € in Millions	Jun. 30, 2025	Dec. 31, 2024
Memorandum items:
Total consolidated assets (Total business) (book value)	€ 1,815,888	€ 1,837,081
Spain \| Accumulated impairment
Memorandum items:
Impairment losses and provision for exposure classified as normal (business in Spain)	1,025	1,132
Spain \| Customers excluding the public sector
Memorandum items:
Total loans and advances to customers excluding the public sector (business in Spain) (book value)	€ 236,622	€ 235,824

- Definition

The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Classes of financial instruments [domain]; Financial liabilities]

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