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Impairment of intangible assets and property, plant and equipment - Additional Information (Details)
 12 Months Ended
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%