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Impairment of intangible assets and property, plant and equipment - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2023 EUR (€) segment | Dec. 31, 2022 EUR (€) segment | Dec. 31, 2021 EUR (€)
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Number of operating segments | segment | 2 | 3 |
Discount rate | 280.00% |  |
Perpetual growth rate | 490.00% |  |
Operating margin rate | 720.00% |  |
Impairment of goodwill recognized | € | € 0 | € 0 | € 0
Bottom of range |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
After tax discount rates | 7.25% |  |
Top of range |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
After tax discount rates | 8.25% |  |
Cash-generating units |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Uniform impairment testing percentage | 7.20% |  |
Uniform pre-tax discount rates | 9.90% |  |
Consumer Healthcare | Goodwill |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Perpetual growth rates applied to future cash flows | 1.00% |  |
Consumer Healthcare | Cash-generating units |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Rate used for Impairment of goodwill | 7.00% |  |
Pre-tax discount rates | 9.30% |  |
Biopharma | Goodwill |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Perpetual growth rates applied to future cash flows | 0.00% |  |
Biopharma | Cash-generating units |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Rate used for Impairment of goodwill | 7.25% |  |
Pre-tax discount rates | 10.00% |  |

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