Consolidated Balance Sheets (Parenthetical) - EUR (€) € in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS
IFRS Statement [Line Items]
Memorandum items: subordinated liabilities	€ 0	€ 0	€ 0
FINANCIAL LIABILITIES AT AMORTIZED COST
IFRS Statement [Line Items]
Memorandum items: subordinated liabilities	€ 29,287	€ 35,813	€ 30,912

The amount of liabilities that are subordinate to other liabilities with respect to claims.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard
-URIDate 2025-03-27

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