v3.26.1
Businesses acquired and divested - Disclosure of business acquisition (Details) - EUR (€)
€ in Millions
4 Months Ended
Apr. 24, 2026
Apr. 23, 2026
Jun. 30, 2026
Apr. 30, 2026
Dec. 31, 2025
Disclosure of detailed information about business combination [line items]          
Carrying amount pre-existing interest     € 1,184   € 1,607
Goldman Sachs TFI          
Disclosure of detailed information about business combination [line items]          
Consideration paid € 94        
Carrying amount pre-existing interest 38        
Remeasurement pre-existing interest 25        
Fair value of pre-existing interest (45%) 63        
Fair value of identifiable net assets (100%) 44        
Goodwill € 113        
Interest held, percentage 100.00% 45.00%      
Percentage of voting equity interests acquired 55.00%     55.00%