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Note 13 Financial assets at fair value through other comprehensive income debt securities by rating (Details) - EUR (€)
€ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 59,074 € 68,308 € 58,731
Percentage of debt securities by rating 100.00% 100.00% 100.00%
BBVA AAA Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 2,413 € 4,345 € 3,669
Percentage of debt securities by rating 4.10% 6.40% 6.20%
BBVA AA Plus Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 586 € 595 € 7,279
Percentage of debt securities by rating 1.00% 0.90% 12.40%
BBVA AA Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 646 € 449 € 317
Percentage of debt securities by rating 1.10% 0.70% 0.50%
BBVA AA Minus Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 327 € 406 € 265
Percentage of debt securities by rating 0.60% 0.60% 0.50%
BBVA A plus Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 6,179 € 5,912 € 3,367
Percentage of debt securities by rating 10.50% 8.70% 5.70%
BBVA A Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 1,676 € 2,112 € 12,895
Percentage of debt securities by rating 2.80% 3.10% 22.00%
BBVA A Minus Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 18,760 € 31,614 € 10,947
Percentage of debt securities by rating 31.80% 46.30% 18.60%
BBVA BBB Plus Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 11,465 € 8,629 € 9,946
Percentage of debt securities by rating 19.40% 12.60% 16.90%
BBVA BBB Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 10,961 € 4,054 € 2,966
Percentage of debt securities by rating 18.60% 5.90% 5.10%
BBVA BBB minus Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 1,310 € 5,116 € 1,927
Percentage of debt securities by rating 2.20% 7.50% 3.30%
BBVA BB Plus Rating [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 4,379 € 4,731 € 4,712
Percentage of debt securities by rating 7.40% 6.90% 8.00%
Unclassified [Member]      
Avaiable for sale financial assets debt securities by rating [Line Items]      
Fair value of debt securities by rating € 372 € 345 € 441
Percentage of debt securities by rating 0.60% 0.50% 0.80%