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Impairment of intangible assets and property, plant and equipment - Summary of Net Impairment Losses of Other Intangible Assets (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Impairment of intangible assets | € (454) | € 192 | € 330 | [1] |
Eloctate |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Reversal amount | 2,154 |  |  |  |
Impairment of intangible assets | 1,651 |  |  |  |
Eloctate | Other intangible assets |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Impairment of intangible assets |  |  |  |  | € 2,800
Marketed products | Eloctate |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Reversal amount | 1,554 |  |  |  |
Research and development projects | Eloctate |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Reversal amount | 600 |  |  |  |
Other intangible assets |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Impairment of other intangible assets, net of reversals (excluding software) | (454) | 192 | 330 |  |
Other intangible assets | Marketed products |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Impairment of other intangible assets, net of reversals (excluding software) | (1,561) | 42 | 2 |  |
Other intangible assets | Research and development projects |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Impairment of other intangible assets, net of reversals (excluding software) | 1,107 | 150 | 328 |  |
Other intangible assets | SAR444245 |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Impairment of other intangible assets, net of reversals (excluding software) | 1,586 |  |  |  |
Pharmaceuticals | Other intangible assets | Marketed products |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Impairment of other intangible assets, net of reversals (excluding software) | (1,542) | 1 | 2 |  |
Consumer Healthcare | Other intangible assets | Marketed products |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Impairment of other intangible assets, net of reversals (excluding software) | (35) | 41 | 0 |  |
Vaccines | Other intangible assets | Marketed products |  |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |  |
Impairment of other intangible assets, net of reversals (excluding software) | € 16 | € 0 | € 0 |  |
[1] | Includes the impacts of the IFRIC final agenda decisions of March 2021 on the costs of configuring or customising application software used in a Software as a Service (SaaS) arrangement and of April 2021 on the attribution of benefits to periods of service, as described in Note A.2.1. to the consolidated financial statements for the year ended December 31, 2021.

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