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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Name:	ifrs-full_DisclosureOfOperatingSegmentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Segment information - Additional Information (Details)	12 Months Ended
Segment information - Additional Information (Details)	Dec. 31, 2022 segment	Dec. 31, 2021 shares	May 29, 2020 shares
Disclosure of operating segments [line items]
Number of operating segments \| segment	3
Regeneron
Disclosure of operating segments [line items]
Non-current financial assets, number of shares (in shares) \| shares		279,766	400,000