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Note 14 Debt securities by rating (Details) - EUR (€)
€ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 34,781 € 35,737 € 38,877
Percentage of debt securities at amortized cost by rating 100.00% 100.00% 100.00%
BBVA AAA Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 143 € 151 € 39
Percentage of debt securities at amortized cost by rating 0.40% 0.40% 0.10%
BBVA AA plus [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 77 € 74 € 6,481
Percentage of debt securities at amortized cost by rating 0.20% 0.20% 16.70%
BBVA AA Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 76 € 64 € 14
Percentage of debt securities at amortized cost by rating 0.20% 0.20% 0.00%
BBVA AA Minus Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 69 € 48 € 713
Percentage of debt securities at amortized cost by rating 0.20% 0.10% 1.80%
BBVA A plus Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 62 € 42 € 0
Percentage of debt securities at amortized cost by rating 0.20% 0.00% 0.00%
BBVA A Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 619 € 590 € 16,806
Percentage of debt securities at amortized cost by rating 1.80% 1.70% 43.20%
BBVA A Minus Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 16,312 € 16,736 € 607
Percentage of debt securities at amortized cost by rating 46.90% 46.80% 1.60%
BBVA BBB Plus Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 9,336 € 7,919 € 3,715
Percentage of debt securities at amortized cost by rating 26.80% 22.20% 9.60%
BBVA BBB Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 3,853 € 942 € 551
Percentage of debt securities at amortized cost by rating 11.10% 2.60% 1.40%
BBVA BBB minus Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 527 € 4,499 € 3,745
Percentage of debt securities at amortized cost by rating 1.50% 12.60% 9.60%
BBVA BB Plus Rating [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 3,120 € 3,928 € 5,123
Percentage of debt securities at amortized cost by rating 9.00% 11.00% 13.20%
Unclassified [Member]      
Debt securities by rating [Line Items]      
Carrying amount of debt securities at amortized cost € 587 € 743 € 1,083
Percentage of debt securities at amortized cost by rating 1.70% 2.10% 2.80%