v3.26.1
Intangible assets - Goodwill - Disclosure of detailed information about goodwill (Details) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Cash-generating units information        
Goodwill € 11,958 € 13,438 € 14,017 € 13,741
Banco Santander (Brasil) S.A.        
Cash-generating units information        
Goodwill 3,031 3,079 3,679  
SAM Investment Holdings Limited        
Cash-generating units information        
Goodwill 1,444 1,444 1,444  
Santander Consumer Germany        
Cash-generating units information        
Goodwill 1,304 1,304 1,304  
Santander Portugal        
Cash-generating units information        
Goodwill 1,040 1,040 1,040  
Santander España        
Cash-generating units information        
Goodwill 998 998 998  
Santander US Auto        
Cash-generating units information        
Goodwill 943 1,068 1,003  
Santander Holding USA (ex. Auto)        
Cash-generating units information        
Goodwill 765 865 814  
Santander UK        
Cash-generating units information        
Goodwill 609 641 612  
Banco Santander - Chile        
Cash-generating units information        
Goodwill 470 482 516  
Grupo Financiero Santander (México)        
Cash-generating units information        
Goodwill 463 453 523  
Ebury Partners Ltd        
Cash-generating units information        
Goodwill 326 340 350  
Santander Consumer Nordics        
Cash-generating units information        
Goodwill 211 211 206  
Santander Bank Polska S.A.        
Cash-generating units information        
Goodwill 0 1,178 1,159  
Other companies        
Cash-generating units information        
Goodwill € 354 € 335 € 369