Basis of Presentation of the Consolidated Financial Statements - Collective Bargaining Agreement and Collective Redundancies Plan (Details) € in Millions		12 Months Ended
Dec. 28, 2023 worker model	Dec. 28, 2023 yr worker	Dec. 31, 2023 EUR (€)
Corporate information and statement of IFRS compliance [abstract]
Number of workers \| worker	3,420	3,420
Minimum age of employees (in years)	56	56
Minimum seniority of employees (in years) \| yr		15
Expense of restructuring activities \| €			€ 1,320

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 2024-01-01
-Paragraph 98
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_b&doctype=Standard
-URIDate 2024-03-27

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