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Note 28 Non Controlling Interest Classified By Concept (Details) - EUR (€)
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Minority interest [Line Items]      
Non-controlling interests € 5,428,000,000   € 5,471,000,000
Profit (loss), attributable to non-controlling interests 476,000,000 € 333,000,000  
BBVA Garanti [Member]      
Minority interest [Line Items]      
Non-controlling interests 3,609,000,000   3,692,000,000
Profit (loss), attributable to non-controlling interests 394,000,000 274,000,000  
Peru BBVA [Member]      
Minority interest [Line Items]      
Non-controlling interests 1,146,000,000   1,171,000,000
Profit (loss), attributable to non-controlling interests 63,000,000 39,000,000  
Argentina BBVA [Member]      
Minority interest [Line Items]      
Non-controlling interests 464,000,000   416,000,000
Profit (loss), attributable to non-controlling interests 3,000,000 18,000,000  
Colombia BBVA [Member]      
Minority interest [Line Items]      
Non-controlling interests 70,000,000   70,000,000
Profit (loss), attributable to non-controlling interests 4,000,000 2,000,000  
Venezuela BBVA [Member]      
Minority interest [Line Items]      
Non-controlling interests 68,000,000   65,000,000
Profit (loss), attributable to non-controlling interests 3,000,000 (2,000,000)  
Other entities BBVA [Member]      
Minority interest [Line Items]      
Non-controlling interests 71,000,000   € 56,000,000
Profit (loss), attributable to non-controlling interests € 8,000,000 € 3,000,000