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Restructuring Costs and Similar Items - Summary of Restructuring Costs and Similar Items (Details) - EUR (€) € in Millions		6 Months Ended		12 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Analysis of income and expense [abstract]
Employee-related expenses		€ 849	€ 185	€ 489
Charges, gains or losses on assets	[1]	(31)	86	293
Costs of transformation programs		347	265	676
Other restructuring costs		166	11	32
Total		€ 1,331	€ 547	€ 1,490
[1] (a) This line consists of impairment losses and accelerated depreciation charges related to site closures (including leased sites), and gains or losses on divestments of assets arising from reorganization decisions made by Sanofi

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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-IssueDate 2023-01-01
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Employee related expenses.

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Expense of restructuring activities related to property plant and equipment to inventories.

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Expense Of Restructuring Activities, Transformation Programs Costs

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Other restructuring costs.

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