Net fee and commission income - Schedule of net fee and commission income (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fee and commission income
Payment Services	€ 2,478	€ 2,219	€ 2,062
Securities business	922	734	584
Insurance and other broking	650	594	529
Portfolio management	796	699	625
Lending business	727	650	602
Financial guarantees and other commitments	461	454	459
Other fee and commission income	264	255	248
Total fee and commission income	6,297	5,604	5,109
Fee and commission expense [abstract]
Payment Services	858	756	704
Securities business	170	147	128
Distribution of products	457	475	480
Other fee and commission expenses	210	218	202
Total fee and commission expenses	1,696	1,596	1,514
Net fee and commission income	€ 4,602	€ 4,008	€ 3,595

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 85
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_85&doctype=Standard
-URIDate 2025-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

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