v3.25.4
Goodwill and Other Intangible Assets - Changes in Goodwill (Detail: Text Values) - EUR (€)
€ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Dec. 31, 2025
 [1]
Dec. 31, 2024
 [1]
Oct. 13, 2023
Intangible assets and goodwill [abstract]        
Group recorded new goodwill to IB CGU       € 235
Impairment of goodwill € 233 € 0 € 0  
[1] 1Impairment losses of goodwill are recorded as impairment of goodwill and other intangible assets in the income statement