v3.25.4
Treasury risk management - Narrative (Details)
€ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Dec. 31, 2023
EUR (€)
 [1]
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Disclosure Of Treasury Risk Management [Line Items]          
Future minimum sublease payments expected to be received € 75 € 69      
Increase (decrease) in finance cost due to reasonable possible increase in risk variable (22)        
Retranslation impact from net investment in group companies 2,160 2,600      
Net finance costs (503) (520) [1] € (409)    
USD          
Disclosure Of Treasury Risk Management [Line Items]          
Net Investment in foreign operations in USD/GBP € 3,100 3,500      
Revolving Credit Facility          
Disclosure Of Treasury Risk Management [Line Items]          
Period of undrawn revolving bilateral credit facility (in days) 364 days        
Revolving credit facility € 2,600 € 2,600   $ 5,200 $ 5,200
Cash flow hedges          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 661 1,585      
Cash flow hedges | USD          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 242 306      
Cash flow hedges | GBP          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 560 404      
Hedges on the net investment in foreign operations          
Disclosure Of Treasury Risk Management [Line Items]          
Credit exposure € 21,600 € 26,000      
Commodity price risk          
Disclosure Of Treasury Risk Management [Line Items]          
Commodity derivatives 284 660      
Cumulative gain (loss) € 83 (27)      
Percentage of possible increase in risk assumption 10.00%     10.00%  
Percentage of possible decrease in risk assumption 10.00%     10.00%  
Commodity price risk | Adjustment basis to inventory purchased          
Disclosure Of Treasury Risk Management [Line Items]          
Cumulative gain (loss) € 28 11      
Commodity price risk | Cash flow hedges          
Disclosure Of Treasury Risk Management [Line Items]          
Gain (loss) in cash flow hedge reserve € 38 81      
Currency risk          
Disclosure Of Treasury Risk Management [Line Items]          
Percentage of possible increase in risk assumption 10.00%     10.00%  
Percentage of possible decrease in risk assumption 10.00%     10.00%  
Financial assets and liabilities other than functional currency amount € 139 351      
Percentage of possible increase/decrease in risk assumption 10.00%     10.00%  
Net foreign exchange loss € 14 35      
Net investment in foreign operations 4,400 7,900      
Currency risk | GBP          
Disclosure Of Treasury Risk Management [Line Items]          
Net Investment in foreign operations in USD/GBP 0 3,100      
Currency risk | Cash flow hedges          
Disclosure Of Treasury Risk Management [Line Items]          
Impact on equity - trade-related cash flow hedges 66 158      
Currency risk | Hedges on the net investment in foreign operations          
Disclosure Of Treasury Risk Management [Line Items]          
Impact on equity - net investment hedges € 43 € 162      
Currency risk | Hedges on the net investment in foreign operations | USD          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 2,762 3,023      
Currency risk | Hedges on the net investment in foreign operations | CNY          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 999 1,081      
Currency risk | Hedges on the net investment in foreign operations | ILS          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 338 323      
Currency risk | Hedges on the net investment in foreign operations | TRY          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 245 0      
Currency risk | Hedges on the net investment in foreign operations | CHF          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 750 0      
Interest rate risk          
Disclosure Of Treasury Risk Management [Line Items]          
Percentage of possible increase in risk assumption 1.00%     1.00%  
Percentage of possible decrease in risk assumption 1.00%     1.00%  
Increase (decrease) in finance cost due to reasonable possible increase in risk variable   € (12)      
Net finance costs € (47) € (94)      
Average interest rate on short term borrowings 4.30% 6.30%      
Interest rate risk | In One Year          
Disclosure Of Treasury Risk Management [Line Items]          
Interest rate fixed on expected financial liability 84.00% 76.00%      
Interest rate risk | In Two Years          
Disclosure Of Treasury Risk Management [Line Items]          
Interest rate fixed on expected financial liability 71.00% 68.00%      
Interest rate risk | Cash flow hedges          
Disclosure Of Treasury Risk Management [Line Items]          
Credit in equity from derivatives in cash flow hedge € 7 € 5      
Debit in equity from derivatives in cash flow hedge € 6 € 5      
Interest rate risk | Cash flow hedges | Interest rate swap contract          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 5,852 2,211      
Interest rate risk | Cash flow hedges | Interest rate swap contract | USD          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 852 961      
Interest rate risk | Fair value hedges | Interest rate swap contract          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 3,494 3,660      
Interest rate risk | Fair value hedges | Interest rate swap contract | USD          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 1,150 1,298      
Interest rate risk | Fair value hedges | Interest rate swap contract | GBP          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 344 362      
Interest rate risk | Hedges on the net investment in foreign operations          
Disclosure Of Treasury Risk Management [Line Items]          
Net finance costs € (20)        
Interest rate risk | Hedges on the net investment in foreign operations | Interest rate swap contract          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 599 647      
Interest rate risk | Hedges on the net investment in foreign operations | Interest rate swap contract | CNY          
Disclosure Of Treasury Risk Management [Line Items]          
Nominal amount of hedging instrument 599 647      
[1] The 2024 and 2023 comparatives have been restated from those previously published to reflect the demerger of our Ice Cream business (see note 21).