v3.26.1
Derivative financial instruments- Disclosure of Financial Currency Hedging Instruments in Place with Notional Amount Translated (Details)
€ in Millions, R$ in Millions, $ in Millions
 6 Months Ended
Jun. 30, 2026
EUR (€)
swaps
Jun. 30, 2025
EUR (€)
Jun. 30, 2026
USD ($)
Jun. 30, 2026
BRL (R$)
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Number of cross currency swaps | swaps 2      
Change in fair value of cash flow hedges € 14 € (23)    
Finance income (cost) (328) € (177)    
Cross currency swap, expiring 2029        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Notional amount | $     $ 870  
Cross currency swap, expiring 2032        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Notional amount | $     870  
Cross currency swap        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Derivative financial liabilities 37      
Change in fair value of cash flow hedges (33)      
Finance income (cost) (4)      
Forward currency sales In US dollar, expiring in 2026 and 2027        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Notional amount | $     12,275  
Derivative financial liabilities 223      
Change in fair value of cash flow hedges (222)      
Finance income (cost) (1)      
Forward currency sales in BRL, expiring in 2027        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Notional amount | R$       R$ 1,200
Derivative financial liabilities 9      
Change in fair value of cash flow hedges (10)      
Finance income (cost) 1      
Forward currency purchases in US dollar, US bond        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Notional amount | $     1,000  
Derivative financial liabilities 6      
Finance income (cost) (6)      
Notional amount        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 29,412      
Notional amount | Cross currency seller swaps        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 1,523      
Notional amount | of which US dollar | 2027        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 1,523      
Notional amount | Forward currency sales        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 16,423      
Notional amount | of which US dollar | 2027        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 13,361      
Notional amount | of which Pound sterling | 2026        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 1,401      
Notional amount | of which Brazilian real | 2026        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 204      
Notional amount | Forward currency purchases        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 11,466      
Notional amount | of which US dollar | 2027        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 8,657      
Notional amount | of which Singapore dollar | 2026        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 1,299      
Notional amount | of which Hungarian forint | 2026        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 543      
Fair value        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place (139)      
Fair value | Cross currency seller swaps        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place (37)      
Fair value | of which US dollar | 2027        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place (37)      
Fair value | Forward currency sales        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place (272)      
Fair value | of which US dollar | 2027        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place (241)      
Fair value | of which Pound sterling | 2026        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place (7)      
Fair value | of which Brazilian real | 2026        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place (9)      
Fair value | Forward currency purchases        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 170      
Fair value | of which US dollar | 2027        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 143      
Fair value | of which Singapore dollar | 2026        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place 6      
Fair value | of which Hungarian forint | 2026        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Financial currency hedging instruments in place € 19      
Fair value | Forward currency purchases in US dollar, US bond        
Disclosure of Information about Terms and Conditions of Hedging Instruments and How They Affect Future Cash Flows [Line Items]        
Notional amount | $     $ 1,000