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Other Intangible Assets and Goodwill (Tables)
 12 Months Ended
Dec. 31, 2023
Intangible Assets [Abstract]  
Summary of Detailed Information About Intangible Assets
(in millions €)
Goodwill
Acquisition costs
As of January 1, 202257.8
Currency differences3.4
As of December 31, 202261.2
As of January 1, 202361.2
Acquisition of subsidiaries and businesses306.9
Currency differences(5.6)
As of December 31, 2023362.5
(in millions €)Concessions, licenses, in-process R&D and similar rights Advance paymentsTotal
Acquisition costs
As of January 1, 2022191.67.8199.4
Additions22.811.434.2
Disposals(0.1)—(0.1)
Reclassifications6.1(6.1)—
Currency differences1.9—1.9
As of December 31, 2022222.313.1235.4
As of January 1, 2023222.313.1235.4
Additions489.215.8505.0
Acquisition of subsidiaries and businesses187.4—187.4
Disposals(1.6)(1.6)(3.2)
Reclassifications4.9(4.9)—
Currency differences(3.6)—(3.6)
As of December 31, 2023898.622.4921.0
(in millions €)Concessions, licenses, in-process R&D and similar rights Advance paymentsTotal
Cumulative amortization and impairment charges
As of January 1, 202254.8—54.8
Amortization22.0—22.0
Disposals(0.1)—(0.1)
Currency differences0.2—0.2
As of December 31, 202276.9—76.9
As of January 1, 202376.9—76.9
Amortization40.5—40.5
Disposals(0.3)—(0.3)
Currency differences(0.2)—(0.2)
As of December 31, 2023116.9—116.9
(in millions €)Concessions, licenses, in-process R&D and similar rights Advance paymentsTotal
Carrying amount
As of December 31, 2022145.413.1158.5
As of December 31, 2023781.722.4804.1
Summary of Goodwill Recognized
CGU ImmunotherapiesExternal Product Sales of JPTExternal Business of InstaDeepTotal
(in millions €)As of December 31, 2023As of December 31, 2022As of December 31, 2023As of December 31, 2022As of December 31, 2023As of December 31, 2022As of December 31, 2023As of December 31, 2022
Goodwill352.260.70.50.59.8—362.561.2
Intangible assets with indefinite useful life444.5—————444.5—
Total796.760.70.50.59.8—807.061.2