v3.25.0.1
Other Intangible Assets and Goodwill - Summary of Detailed Information About Intangible Assets (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance € 804.1  
Ending balance 790.4 € 804.1
Gross carrying amount    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance 921.0 235.4
Additions 115.2 505.0
Disposals 2.9 3.2
Reclassifications 0.0 0.0
Currency differences (11.1) 3.6
Acquisition of subsidiaries and businesses   187.4
Ending balance 1,044.4 921.0
Cumulative depreciation and impairment charges    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance (116.9) (76.9)
Amortization 54.8 40.5
Impairment (83.3) 0.0
Disposals (2.8) (0.3)
Currency differences 1.8 (0.2)
Ending balance (254.0) (116.9)
In-process R&D    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance 443.5  
Ending balance 485.5 443.5
In-process R&D | Gross carrying amount    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance 443.5 0.0
Additions 97.1  
Disposals 0.0 0.0
Reclassifications 0.0 0.0
Currency differences 0.0 0.0
Acquisition of subsidiaries and businesses   0.0
Ending balance 540.6 443.5
In-process R&D | Cumulative depreciation and impairment charges    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance 0.0 0.0
Amortization 0.0 0.0
Impairment (55.1)  
Disposals 0.0 0.0
Currency differences 0.0 0.0
Ending balance (55.1) 0.0
Concessions, licenses and similar rights    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance 338.2  
Ending balance 282.2 338.2
Concessions, licenses and similar rights | Gross carrying amount    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance 455.1 222.3
Additions 6.2 45.7
Disposals 2.9 1.6
Reclassifications 11.6 4.9
Currency differences (11.1) 3.6
Acquisition of subsidiaries and businesses   187.4
Ending balance 481.1 455.1
Concessions, licenses and similar rights | Cumulative depreciation and impairment charges    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance (116.9) (76.9)
Amortization 54.8 40.5
Impairment (28.2)  
Disposals (2.8) (0.3)
Currency differences 1.8 (0.2)
Ending balance (198.9) (116.9)
Advance payments    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance 22.4  
Ending balance 22.7 22.4
Advance payments | Gross carrying amount    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance 22.4 13.1
Additions 11.9 15.8
Disposals 0.0 1.6
Reclassifications (11.6) (4.9)
Currency differences 0.0 0.0
Acquisition of subsidiaries and businesses   0.0
Ending balance 22.7 22.4
Advance payments | Cumulative depreciation and impairment charges    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Beginning balance 0.0 0.0
Amortization 0.0 0.0
Impairment 0.0  
Disposals 0.0 0.0
Currency differences 0.0 0.0
Ending balance € 0.0 € 0.0