The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill]

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The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]]

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The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill]

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The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill]

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Number of operating segments.

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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