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Segment information - Schedule of Acquisition of Intangible Assets, Property, Plant and Equipment and Investments Accounted for Using the Equity Method by Segment (Details) - Biopharma (operating segment) - EUR (€) € in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure of operating segments [line items]
Investments accounted for using the equity method (a)	[1]	€ 234	€ 234	€ 248
Acquisitions of property, plant and equipment		1,733	1,619	1,529
Acquisitions of other intangible assets		€ 1,462	€ 1,287	€ 574
[1] (a)Carrying amount at the end of the reporting period.

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The cash outflow for the purchases of intangible assets, classified as investing activities. [Refer: Intangible assets other than goodwill]

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The cash outflow for the purchases of property, plant and equipment, classified as investing activities. [Refer: Property, plant and equipment]

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