v3.26.1
Debt, cash and cash equivalents - Summary of Reconciliation of Carrying Amount to Value on Redemption (Details) - EUR (€)
€ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure of reconciliation of carrying amount to value on redemption [line items]    
Long-term debt € 14,646 € 14,248
Short-term debt and current portion of long-term debt 7,026 4,342
Interest rate and currency derivatives used to manage debt 221 112
Total debt 21,893 18,702
Cash and cash equivalents (6,350) (7,657)
Interest rate and currency derivatives used to manage cash and cash equivalents (30) (37)
Net debt 15,513 11,008
Lease liabilities 1,904 1,739
Amortized cost    
Disclosure of reconciliation of carrying amount to value on redemption [line items]    
Long-term debt 44  
Short-term debt and current portion of long-term debt 1  
Interest rate and currency derivatives used to manage debt 0  
Total debt 45  
Cash and cash equivalents 0  
Interest rate and currency derivatives used to manage cash and cash equivalents 0  
Net debt 45  
Adjustment to debt measured at fair value    
Disclosure of reconciliation of carrying amount to value on redemption [line items]    
Long-term debt 61  
Short-term debt and current portion of long-term debt 0  
Interest rate and currency derivatives used to manage debt (131)  
Total debt (70)  
Cash and cash equivalents 0  
Interest rate and currency derivatives used to manage cash and cash equivalents 0  
Net debt (70)  
Value on redemption    
Disclosure of reconciliation of carrying amount to value on redemption [line items]    
Long-term debt 14,751 14,360
Short-term debt and current portion of long-term debt 7,027 4,344
Interest rate and currency derivatives used to manage debt 90 12
Total debt 21,868 18,716
Cash and cash equivalents (6,350) (7,657)
Interest rate and currency derivatives used to manage cash and cash equivalents (30) (37)
Net debt € 15,488 € 11,022