v3.25.4
Property, plant and equipment - Narrative (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of Detailed Information about Property, Plant and Equipment [Line Items]    
Commitments to purchase property, plant and equipment € 511 € 694
Short term lease expense 114 121
Low value lease expense 47 57
Income from sublet properties 11 10
Total cash outflows for leases € 380 € 411
Freehold buildings    
Disclosure of Detailed Information about Property, Plant and Equipment [Line Items]    
Useful life measured as period of time, property, plant and equipment 40 years  
Land and buildings    
Disclosure of Detailed Information about Property, Plant and Equipment [Line Items]    
Useful life measured as period of time, property, plant and equipment 40 years  
Plant and equipment | Bottom of range    
Disclosure of Detailed Information about Property, Plant and Equipment [Line Items]    
Useful life measured as period of time, property, plant and equipment 2 years  
Plant and equipment | Top of range    
Disclosure of Detailed Information about Property, Plant and Equipment [Line Items]    
Useful life measured as period of time, property, plant and equipment 20 years