v3.26.1
Cash flow information - Schedule Of Net Debt Reconciliation (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Schedule Of Net Debt Reconciliation [Line Items]      
Beginning balance € (1,050) € (1,291) € (3,346)
Additions through business combinations (2,483)    
Cash flows (net) (2,070) 181 2,711
Foreign exchange adjustments (227) 98 (86)
Transfers     (550)
Other non-cash movements [1] 35 (38) 20
Ending balance (5,865) (1,050) (1,291)
Cash And Cash Equivalents [Member]      
Schedule Of Net Debt Reconciliation [Line Items]      
Beginning balance 3,521 2,907 1,047
Additions through business combinations 769    
Cash flows (net) (2,887) 472 1,983
Foreign exchange adjustments (328) 142 (123)
Ending balance 1,075 3,521 2,907
Short-term borrowings [member]      
Schedule Of Net Debt Reconciliation [Line Items]      
Beginning balance (273) (716) (719)
Cash flows (net) 2,906 717 706
Transfers (3,427) (273) (700)
Other non-cash movements [1] 4 (1) 3
Ending balance (798) (273) (716)
Long-term borrowings [member]      
Schedule Of Net Debt Reconciliation [Line Items]      
Beginning balance (4,247) (3,443) (3,629)
Additions through business combinations (2,631)    
Cash flows (net) (2,149) (1,034)  
Foreign exchange adjustments 89 (42) 36
Transfers 3,427 273 150
Other non-cash movements [1] (4) (1) 0
Ending balance (5,507) (4,247) (3,443)
Lease Liabilities Repayable Within One Year [Member]      
Schedule Of Net Debt Reconciliation [Line Items]      
Beginning balance (19) (16) (15)
Additions through business combinations (61)    
Cash flows (net) 40 4 4
Foreign exchange adjustments 3 (2) 1
Transfers (34) (8) (9)
Other non-cash movements [1] (5) 3 3
Ending balance (76) (19) (16)
Lease Liabilities Repayable After One Year [Member]      
Schedule Of Net Debt Reconciliation [Line Items]      
Beginning balance (32) (23) (30)
Additions through business combinations (560)    
Cash flows (net) 20 22 18
Foreign exchange adjustments 9    
Transfers 34 8 9
Other non-cash movements [1] (30) (39) (20)
Ending balance € (559) € (32) € (23)
[1] related to loan origination costs and leases