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Other Intangible Assets and Goodwill - Additional Information (Details) € in Millions, $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 30, 2023 EUR (€) | Nov. 30, 2023 USD ($) | Aug. 31, 2023 EUR (€) | Aug. 31, 2023 USD ($) | Apr. 30, 2023 EUR (€) | Apr. 30, 2023 USD ($) | Dec. 31, 2023 EUR (€) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 EUR (€)
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | € 362.5 |  | € 61.2
Growth rate used to extrapolate cash flow projections (as a percent) |  |  |  |  |  |  | 1.00% |  |
Upfront payment |  |  |  |  |  |  | € 443.5 |  |
Impairment loss for a reduction of future cash flows (as a percent) |  |  |  |  |  |  | 10.00% | 10.00% |
Weighted average cost of capital (as a percent) |  |  |  |  |  |  | 10.00% | 10.00% |
Increase (decrease) in intangible assets |  |  |  |  |  |  | € 645.6 |  |
Prepayment for future development activities |  |  |  |  |  |  | 22.5 |  |
Other intangible assets |  |  |  |  |  |  | 804.1 |  | € 158.5
DeepChain Technology |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Other intangible assets |  |  |  |  |  |  | € 163.3 |  |
Useful life measured as period of time, intangible assets other than goodwill (in years) |  |  |  |  |  |  | 6 years 7 months 6 days | 6 years 7 months 6 days |
Duality Biologics (Suzhou) Co. Ltd., |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Upfront payment |  |  | € 203.7 | $ 220.0 |  |  |  |  |
OncoC4 Inc. |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Upfront payment |  |  |  |  | € 181.5 | $ 200.0 |  |  |
Upfront payment, acquisition of intangible asset |  |  |  |  | € 125.2 |  |  |  |
Medilink Therapeutics (Suzhou) Co. Ltd., |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Upfront payment | € 64.1 | $ 70.0 |  |  |  |  |  |  |
Biotheus Inc., |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Upfront payment |  |  |  |  |  |  | € 50.6 | $ 55.0 |

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