v3.26.1
Segment information - Schedule of Acquisition of Intangible Assets, Property, Plant and Equipment and Investments Accounted for Using the Equity Method by Segment (Details) - EUR (€)
€ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Disclosure of operating segments [Line Items]      
Investments accounted for using the equity method € 3,207   € 3,259
Biopharma      
Disclosure of operating segments [Line Items]      
Investments accounted for using the equity method 204 € 483  
Acquisitions of property, plant and equipment 882 845  
Acquisitions of other intangible assets € 414 € 575