Restructuring Costs and Similar Items - Summary of Restructuring Costs and Similar Items (Details) - EUR (€) € in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Analysis of income and expense [abstract]
Employee-related expenses	€ 185	€ 524	€ 507
Charges, gains or losses on assets	86	(2)	261
Compensation for early termination of contracts (other than contracts of employment)	0	0	1
Costs of transformation programs	265	266	547
Other restructuring costs	11	4	20
Total	€ 547	€ 792	€ 1,336

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 2022-03-24
-Paragraph 98
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_98_b&doctype=Standard
-URIDate 2022-03-24

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration