v3.26.1
Provisions - Disclosure of Movements of Provisions Explanatory (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of Movements of Provisions [Line Items]      
Beginning balance € 131 € 91 € 74
Provisions acquired through business combinations 74    
Additional provisions recognized 67 72 34
Unused amounts reversed (51) 0 (1)
Used during the year (90) (41) (10)
Reclassifications (17) 8 (3)
Impact of currency translation (4) 1 (3)
Ending balance 110 131 91
Non-current provisions 46 3 3
Current provisions 64 128 88
Current, Restructuring provision 44 51  
Group Tax Provisions [Member]      
Disclosure of Movements of Provisions [Line Items]      
Beginning balance 34 59 58
Provisions acquired through business combinations 26    
Additional provisions recognized 4 4 7
Unused amounts reversed (36) 0 0
Used during the year (1) 0 0
Reclassifications 2 (30) (3)
Impact of currency translation (3) 1 (3)
Ending balance 26 34 59
Non-current, Group tax provision 23 2 2
Current, Group tax provision 3 32 57
Restructuring provision [member]      
Disclosure of Movements of Provisions [Line Items]      
Beginning balance 51 31 14
Provisions acquired through business combinations 9    
Additional provisions recognized 56 63 27
Unused amounts reversed (12) 0 0
Used during the year (58) (41) (10)
Reclassifications 0 (2) 0
Impact of currency translation (2) 0 0
Ending balance 44 51 31
Non-current, Restructuring provision 0 0 0
Current, Restructuring provision 44 51 31
Warranty provision [member]      
Disclosure of Movements of Provisions [Line Items]      
Beginning balance 0    
Provisions acquired through business combinations 25    
Additional provisions recognized 7    
Unused amounts reversed 0    
Used during the year (5)    
Reclassifications 0    
Impact of currency translation 0    
Ending balance 27 0  
Non-current, Warranty provision 16    
Current, Warranty provision 11    
Miscellaneous other provisions [member]      
Disclosure of Movements of Provisions [Line Items]      
Beginning balance 46 1 2
Provisions acquired through business combinations 14    
Additional provisions recognized 0 5 0
Unused amounts reversed (2) 0 (1)
Used during the year (25) 0 0
Reclassifications (19) 40 0
Impact of currency translation (1) 0 0
Ending balance 13 46 1
Non-current, Other provisions 7 1 1
Current, Other provisions € 6 € 45 € 0