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Note 16 Investments In Subsidiaries Joint Ventures And Associates (Details) - EUR (€)
€ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in joint ventures € 152 € 149 € 154  
Investments in associates 749 1,288 1,334  
Investments in subsidiaries, joint ventures and associates 900 1,437 1,488 € 1,578
Altura markets SV SA [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in joint ventures 76 77 73  
RCI Colombia [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in joint ventures 40 36 37  
Desarrollo Metropolitanos del Sur SL [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in joint ventures 18 17 14  
Other joint ventures [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in joint ventures 18 19 30  
Divarian Propiedad SAU [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 0 567 630  
Metrovacesa SA [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 259 285 443  
BBVA allianz seguros y reaseguros SA [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 254 250 0  
ATOM Bank PLC [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 77 64 136  
Solarisbank AG [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 61 39 36  
Cofides [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 28 25 23  
Redsys servicios de procesamiento SL [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 19 14 14  
Servicios electronicos globales SA de CV [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates 15 11 11  
Other associates [Member]        
Disclosure of Investments in subsidiaries joint ventures and associates [Line Items]        
Investments in associates € 35 € 33 € 41