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Intangible assets, net - Finite-Lived Other Intangible Assets (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Cost      
Cost, beginning balance € 1,857.3 € 1,822.5  
Additions 39.3 34.0  
Disposals (0.3) (1.6)  
Effect of changes in exchange rates (1.4) 2.4  
Cost, ending balance 1,894.9 1,857.3 € 1,822.5
Accumulated amortization      
Accumulated amortization, beginning balance 1,014.9 870.4  
Amortization 127.6 135.1 133.0
Impairment charges 11.1 9.2 0.0
Disposals (0.3) (1.4)  
Accumulated amortization, ending balance 1,153.2 1,014.9 870.4
Carrying amount      
Carrying amount 741.7 842.4  
Accumulated Amortization      
Cost      
Effect of changes in exchange rates (0.1) 1.6  
Brands      
Cost      
Cost, beginning balance 38.9 38.9  
Additions 0.0 0.0  
Disposals 0.0 0.0  
Effect of changes in exchange rates 0.0 0.0  
Cost, ending balance 38.9 38.9 38.9
Accumulated amortization      
Accumulated amortization, beginning balance 14.9 13.0  
Amortization 1.9 1.9  
Impairment charges 0.0 0.0  
Disposals 0.0 0.0  
Accumulated amortization, ending balance 16.8 14.9 13.0
Carrying amount      
Carrying amount 22.1 24.0  
Brands | Accumulated Amortization      
Cost      
Effect of changes in exchange rates 0.0 0.0  
Intellectual property      
Cost      
Cost, beginning balance 147.1 144.8  
Additions 0.0 1.5  
Disposals 0.0 0.0  
Effect of changes in exchange rates 0.0 0.8  
Cost, ending balance 147.1 147.1 144.8
Accumulated amortization      
Accumulated amortization, beginning balance 95.8 87.2  
Amortization 8.3 8.6  
Impairment charges 0.0 0.0  
Disposals 0.0 0.0  
Accumulated amortization, ending balance 104.1 95.8 87.2
Carrying amount      
Carrying amount 43.0 51.3  
Intellectual property | Accumulated Amortization      
Cost      
Effect of changes in exchange rates 0.0 0.0  
Developed technology      
Cost      
Cost, beginning balance 1,220.2 1,220.2  
Additions 0.0 0.0  
Disposals 0.0 0.0  
Effect of changes in exchange rates 0.0 0.0  
Cost, ending balance 1,220.2 1,220.2 1,220.2
Accumulated amortization      
Accumulated amortization, beginning balance 677.4 594.0  
Amortization 76.8 83.4  
Impairment charges 0.0 0.0  
Disposals 0.0 0.0  
Accumulated amortization, ending balance 754.2 677.4 594.0
Carrying amount      
Carrying amount 466.0 542.8  
Developed technology | Accumulated Amortization      
Cost      
Effect of changes in exchange rates 0.0 0.0  
Customer relationships      
Cost      
Cost, beginning balance 228.6 228.6  
Additions 0.0 0.0  
Disposals 0.0 0.0  
Effect of changes in exchange rates 0.0 0.0  
Cost, ending balance 228.6 228.6 228.6
Accumulated amortization      
Accumulated amortization, beginning balance 121.3 108.6  
Amortization 12.7 12.7  
Impairment charges 0.0 0.0  
Disposals 0.0 0.0  
Accumulated amortization, ending balance 134.0 121.3 108.6
Carrying amount      
Carrying amount 94.6 107.3  
Customer relationships | Accumulated Amortization      
Cost      
Effect of changes in exchange rates 0.0 0.0  
Other      
Cost      
Cost, beginning balance 222.5 190.0  
Additions 39.3 32.5  
Disposals (0.3) (1.6)  
Effect of changes in exchange rates (1.4) 1.6  
Cost, ending balance 260.1 222.5 190.0
Accumulated amortization      
Accumulated amortization, beginning balance 105.5 67.6  
Amortization 27.9 28.5  
Impairment charges 11.1 9.2  
Disposals (0.3) (1.4)  
Accumulated amortization, ending balance 144.1 105.5 € 67.6
Carrying amount      
Carrying amount 116.0 117.0  
Other | Accumulated Amortization      
Cost      
Effect of changes in exchange rates € (0.1) € 1.6