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List of principal companies included in the scope of consolidation during 2023 - Summary of Principal Investments Accounted for Using the Equity Method (Details)	12 Months Ended
	Dec. 31, 2024
Haleon US, LP
Disclosure of joint operations [line Items]
Financial interest in principal investments accounted for using the equity method	11.70%
Infraserv GmbH & Co. Höchst KG
Disclosure of joint operations [line Items]
Financial interest in principal investments accounted for using the equity method	31.20%
Maphar
Disclosure of joint operations [line Items]
Financial interest in principal investments accounted for using the equity method	48.30%
MCM Vaccine BV
Disclosure of joint operations [line Items]
Financial interest in principal investments accounted for using the equity method	50.00%
MSP Vaccine Company (formerly MCM company)
Disclosure of joint operations [line Items]
Financial interest in principal investments accounted for using the equity method	50.00%
EUROAPI
Disclosure of joint operations [line Items]
Financial interest in principal investments accounted for using the equity method	29.60%

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- Definition

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.

+ References

No definition available.

+ Details

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- Definition

The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Joint operations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2023-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_21_a_iv&doctype=Standard
-URIDate 2023-03-23

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- Details

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- Details

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- Details

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- Details

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