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Note 3 - BBVA Group - Contribution to Consolidated Group Assets (Details) - EUR (€)
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Contribution To Consolidated Group Assets Line Items      
Contributed To Consolidated Group Assets € 736,176,000,000 € 697,737,000,000 € 675,675,000,000
Banking And Other Financial Services [Member]      
Contribution To Consolidated Group Assets Line Items      
Contributed To Consolidated Group Assets 705,683,000,000 666,366,000,000 646,199,000,000
Insurance And Pension Fund [Member]      
Contribution To Consolidated Group Assets Line Items      
Contributed To Consolidated Group Assets 28,667,000,000 29,300,000,000 26,684,000,000
Other Non Financial [Member]      
Contribution To Consolidated Group Assets Line Items      
Contributed To Consolidated Group Assets € 1,826,000,000 € 2,071,000,000 € 2,793,000,000