Restructuring (Detail: Text Values) € in Millions	12 Months Ended
Dec. 31, 2025 EUR (€) staff	Dec. 31, 2024 EUR (€) staff	Dec. 31, 2023 EUR (€) staff
Net Restructuring Expense by Division [Line Items]
Restructuring provision \| €	€ 151	€ 273	€ 333
Total full-time equivalent staff
Net Restructuring Expense by Division [Line Items]
Full-time equivalent staff reduced through restructuring \| staff	535	168	476

The amount of provision for restructuring, such as the sale or termination of a line of business; closure of business locations in a country or region or relocation of activities from one country or region to another; changes in management structure; and fundamental reorganisations that have a material effect on the nature and focus of the entity's operations. [Refer: Other provisions]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 37
-IssueDate 2025-01-01
-Paragraph 70
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2025-en-r&anchor=para_70&doctype=Standard
-URIDate 2025-03-27

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