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Goodwill and other intangible assets - Additional Information (Details) € in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2023 EUR (€) segment | Dec. 31, 2022 EUR (€) segment | Dec. 31, 2021 EUR (€) | Sep. 29, 2023 EUR (€) | Feb. 08, 2022 EUR (€) | Sep. 14, 2021 EUR (€)
Disclosure of reconciliation of changes in goodwill [line items] |  |  |  |  |  |
Number of operating segments | segment | 2 | 3 |  |  |  |
Goodwill | € 49,404 | € 49,892 | € 48,056 |  |  |
Intangible assets other than goodwill | 24,319 | 21,640 | 21,407 |  |  |
Gross value |  |  |  |  |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |  |  |  |  |
Acquisitions and other increases | 3,112 | 571 | 616 |  |  |
Marketed products |  |  |  |  |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |  |  |  |  |
Intangible assets other than goodwill | € 16,600 | 12,700 | 11,700 |  |  |
Useful life, intangible assets other than goodwill (in years) | 11 years |  |  |  |  |
Technological platforms |  |  |  |  |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |  |  |  |  |
Intangible assets other than goodwill | € 1,200 | € 2,200 | € 1,200 |  |  |
Useful life, intangible assets other than goodwill (in years) | 18 years |  |  |  |  |
ALTUVIIIO | Gross value |  |  |  |  |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |  |  |  |  |
Acquisitions and other increases | € 1,110 |  |  |  |  |
QRIB Intermediate Holding |  |  |  |  |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |  |  |  |  |
Identifiable intangible assets recognised as of acquisition date |  |  |  | € 774 |  |
Goodwill |  |  |  | € 475 |  |
Amunix |  |  |  |  |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |  |  |  |  |
Identifiable intangible assets recognised as of acquisition date |  |  |  |  | € 493 |
Goodwill |  |  |  |  | € 609 |
Translate Bio |  |  |  |  |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |  |  |  |  |
Identifiable intangible assets recognised as of acquisition date |  |  |  |  |  | € 396
Goodwill |  |  |  |  |  | € 2,118

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