Other Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2024

Intangible Assets [Abstract]

Summary of Detailed Information About Intangible Assets



(in millions €)			Goodwill
Acquisition costs
As of January 1, 2023			61.2
Currency differences			(5.6)
Acquisition of subsidiaries and businesses			306.9
As of December 31, 2023			362.5
Acquisition of subsidiaries and businesses			—
Currency differences			18.1
As of December 31, 2024			380.6



(in millions €)			In-process R&D		Concessions, licenses and similar rights		Advance payments		Total
Acquisition costs
As of January 1, 2023			—		222.3		13.1		235.4
Additions			443.5		45.7		15.8		505.0
Disposals			—		(1.6)		(1.6)		(3.2)
Reclassifications			—		4.9		(4.9)		—
Currency differences			—		(3.6)		—		(3.6)
Acquisition of subsidiaries and businesses			—		187.4		—		187.4
As of December 31, 2023			443.5		455.1		22.4		921.0
Additions			97.1		6.2		11.9		115.2
Disposals			—		(2.9)		—		(2.9)
Reclassifications			—		11.6		(11.6)		—
Currency differences			—		11.1		—		11.1
As of December 31, 2024			540.6		481.1		22.7		1,044.4



(in millions €)			In-process R&D		Concessions, licenses and similar rights		Advance payments		Total
Cumulative amortization and impairment charges
As of January 1, 2023			—		76.9		—		76.9
Amortization			—		40.5		—		40.5
Disposals			—		(0.3)		—		(0.3)
Currency differences			—		(0.2)		—		(0.2)
As of December 31, 2023			—		116.9		—		116.9
Amortization			—		54.8		—		54.8
Impairment			55.1		28.2		—		83.3
Disposals			—		(2.8)		—		(2.8)
Currency differences			—		1.8		—		1.8
As of December 31, 2024			55.1		198.9		—		254.0



(in millions €)			In-process R&D		Concessions, licenses and similar rights		Advance payments		Total
Carrying amount
As of December 31, 2023			443.5		338.2		22.4		804.1
As of December 31, 2024			485.5		282.2		22.7		790.4

Summary of Goodwill Recognized



			CGU Immunotherapies						CGU External Product Sales of JPT						CGU External Business of InstaDeep						Total
(in millions €)			As of December 31, 2024			As of December 31, 2023			As of December 31, 2024			As of December 31, 2023			As of December 31, 2024			As of December 31, 2023			As of December 31, 2024			As of December 31, 2023
Goodwill			369.8			352.2			0.5			0.5			10.3			9.8			380.6			362.5
Intangible assets with indefinite useful life			486.5			444.5			—			—			—			—			486.5			444.5
Total			856.3			796.7			0.5			0.5			10.3			9.8			867.1			807.0