Financial liabilities at fair value through profit or loss - Trading liabilities by type (Details) - EUR (€) € in Millions	Dec. 31, 2024	Dec. 31, 2023
Disclosure of fair value measurement of liabilities [line items]
Trading liabilities	€ 35,255	€ 37,220
Equity securities
Disclosure of fair value measurement of liabilities [line items]
Trading liabilities	467	1,156
- Debt securities
Disclosure of fair value measurement of liabilities [line items]
Trading liabilities	3,185	2,492
Funds on deposit
Disclosure of fair value measurement of liabilities [line items]
Trading liabilities	5,437	10,443
- Derivatives
Disclosure of fair value measurement of liabilities [line items]
Trading liabilities	€ 26,166	€ 23,129

The amount of financial liabilities at fair value through profit or loss that meet the definition of held for trading. A financial liability is classified as held for trading if: (a) it is acquired or incurred principally for the purpose of selling or repurchasing it in the near term; (b) on initial recognition it is part of a portfolio of identified financial instruments that are managed together and for which there is evidence of a recent actual pattern of short-term profit-taking; or (c) it is a derivative (except for a derivative that is a financial guarantee contract or a designated and effective hedging instrument). [Refer: Financial liabilities at fair value through profit or loss]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 8
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_8_e&doctype=Standard
-URIDate 2024-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant