v3.26.1
Intangible assets - Goodwill - Narrative (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reconciliation of changes in goodwill [line items]      
Exchange differences and other items € (291) € (605) € 240
Impairment loss recognised in profit or loss, goodwill € 4 € 4 € 20
Sensitivity analysis, discount rate adjustment, increase (in basis points) 0.50%    
Sensitivity analysis, discount rate adjustment, decrease (in basis points) 0.50%    
Sensitivity analysis, perpetuity growth rate adjustment, decrease (in basis points) 0.50%    
Sensitivity analysis, perpetuity growth rate adjustment, increase (in basis points) 0.50%    
Sensitivity analysis, cash flow projections, decrease 5.00%    
Minimum      
Disclosure of reconciliation of changes in goodwill [line items]      
Earnings projections based on financial budgets, approve period 3 years    
Maximum      
Disclosure of reconciliation of changes in goodwill [line items]      
Earnings projections based on financial budgets, approve period 5 years