The amount of expense relating to restructuring. Restructuring is a programme that is planned and controlled by management and materially changes either the scope of a business undertaken by an entity or the manner in which that business is conducted. Such programmes include: (a) the sale or termination of a line of business; (b) closure of business locations in a country or region or the relocation of activities from one country or region to another; (c) changes in management structure; and (d) fundamental reorganisations that have a material effect on the nature and focus of the entity's operations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 98
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_98_b&doctype=Standard
-URIDate 2023-03-23

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

Events After the Reporting Period (Details) € in Millions	3 Months Ended	12 Months Ended
Events After the Reporting Period (Details) € in Millions	Mar. 31, 2024 EUR (€)	Dec. 31, 2023 EUR (€) item	Dec. 31, 2022 EUR (€)	Dec. 31, 2021 EUR (€)	Feb. 14, 2024 EUR (€)	Aug. 14, 2023 EUR (€)
Events after the Reporting Period
Restructuring costs	€ 2,000	€ 215	€ 138	€ 157
Restructuring program affected positions \| item		8,000
Share repurchase program total volume		€ 949				€ 1,250
First tranche
Events after the Reporting Period
Share repurchase program total volume					€ 1,011