v3.25.4
Note 16 Investments In Subsidiaries Joint Ventures And Associates (Details) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in joint ventures € 111 € 94 € 93  
Investments in associates 883 895 883  
Investments in subsidiaries, joint ventures and associates 994 989 976 € 916
Altura markets SV SA [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in joint ventures 44 38 31  
RCI Colombia [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in joint ventures 37 37 40  
Other joint ventures [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in joint ventures 29 19 22  
Metrovacesa SA [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 282 300 259  
BBVA allianz seguros y reaseguros SA [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 277 265 251  
ATOM Bank PLC [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 222 222 211  
Servicios electronicos globales SA de CV [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 56 43 36  
Other associates [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates € 45 € 65 € 127