Note 54 - Remuneration And Other Benefits Received By The Board Of Directors And Members Of The Bank's Senior Management - Remuneration For Non Executive Directors (Details)	12 Months Ended
	Dec. 31, 2020 EUR (€)
Jose Miguel Andres Torrecillas | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	€ 129,000,000
Jose Miguel Andres Torrecillas | Executie Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	111,000,000
Jose Miguel Andres Torrecillas | Audit And Compliance Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	66,000,000
Jose Miguel Andres Torrecillas | Risk Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	36,000,000
Jose Miguel Andres Torrecillas | Appointments Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	115,000,000
Jose Miguel Andres Torrecillas | Other [Member]
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	50,000,000	[1]
Jose Miguel Andres Torrecillas | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	507,000,000
Jaime Felix Caruana Lacorte [Member] | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	129,000,000
Jaime Felix Caruana Lacorte [Member] | Executie Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	167,000,000
Jaime Felix Caruana Lacorte [Member] | Audit And Compliance Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	165,000,000
Jaime Felix Caruana Lacorte [Member] | Risk Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	107,000,000
Jaime Felix Caruana Lacorte [Member] | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	567,000,000
Raul Galamba De Oliver Member [Member] | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	107,000,000	[2]
Raul Galamba De Oliver Member [Member] | Risk Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	71,000,000	[2]
Raul Galamba De Oliver Member [Member] | Technology And Cybersecurity Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	32,000,000	[2]
Raul Galamba De Oliver Member [Member] | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	211,000,000	[2]
Belen Garijo Lopez | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	129,000,000
Belen Garijo Lopez | Audit And Compliance Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	66,000,000
Belen Garijo Lopez | Remuneration Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	107,000,000
Belen Garijo Lopez | Appointments Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	46,000,000
Belen Garijo Lopez | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	349,000,000
Sunir Kumar Kapoor | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	129,000,000
Sunir Kumar Kapoor | Technology And Cybersecurity Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	43,000,000
Sunir Kumar Kapoor | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	172,000,000
Lourdes Maiz Carro | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	129,000,000
Lourdes Maiz Carro | Audit And Compliance Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	66,000,000
Lourdes Maiz Carro | Remuneration Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	43,000,000
Lourdes Maiz Carro | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	238,000,000
Jose Maldonado Ramos | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	129,000,000
Jose Maldonado Ramos | Executie Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	167,000,000
Jose Maldonado Ramos | Appointments Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	46,000,000
Jose Maldonado Ramos | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	342,000,000
Ana Peralta Moreno [Member] | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	129,000,000
Ana Peralta Moreno [Member] | Audit And Compliance Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	66,000,000
Ana Peralta Moreno [Member] | Remuneration Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	43,000,000
Ana Peralta Moreno [Member] | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	238,000,000
Juan Pi Llorens | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	129,000,000
Juan Pi Llorens | Risk Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	214,000,000
Juan Pi Llorens | Appointments Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	46,000,000
Juan Pi Llorens | Technology And Cybersecurity Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	43,000,000
Juan Pi Llorens | Other [Member]
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	80,000,000	[1]
Juan Pi Llorens | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	512,000,000
Ana Revenga Shanklin Member [Member] | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	97,000,000	[2]
Ana Revenga Shanklin Member [Member] | Risk Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	71,000,000	[2]
Ana Revenga Shanklin Member [Member] | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	168,000,000	[2]
Susana Rodriguez Vidarte | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	129,000,000
Susana Rodriguez Vidarte | Executie Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	167,000,000
Susana Rodriguez Vidarte | Risk Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	107,000,000
Susana Rodriguez Vidarte | Appointments Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	46,000,000
Susana Rodriguez Vidarte | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	449,000,000
Carlos Salazar Lomelin Member [Member] | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	97,000,000	[2]
Carlos Salazar Lomelin Member [Member] | Remuneration Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	29,000,000	[2]
Carlos Salazar Lomelin Member [Member] | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	125,000,000	[2]
Jan Verplancke [Member] | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	129,000,000
Jan Verplancke [Member] | Remuneration Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	29,000,000
Jan Verplancke [Member] | Technology And Cybersecurity Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	43,000,000
Jan Verplancke [Member] | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	200,000,000
Total remuneration for non executive directors | Board Of Directors
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	1,588,000,000	[3]
Total remuneration for non executive directors | Executie Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	611,000,000	[3]
Total remuneration for non executive directors | Audit And Compliance Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	431,000,000	[3]
Total remuneration for non executive directors | Risk Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	606,000,000	[3]
Total remuneration for non executive directors | Remuneration Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	250,000,000	[3]
Total remuneration for non executive directors | Appointments Committee
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	301,000,000	[3]
Total remuneration for non executive directors | Technology And Cybersecurity Committe
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	161,000,000	[3]
Total remuneration for non executive directors | Other [Member]
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	130,000,000	[1],[3]
Total remuneration for non executive directors | Directors Remuneration Expense
Explanatory Remuneration Of Non Executive Directors Received Line Items
Total Remuneration Non Executive Directors	€ 4,078,000,000	[3]

[1] Amounts received during the 2020 financial year by José Miguel Andrés Torrecillas , in his capacity as Deputy Chair of the Board of Directors, and by Juan Pi Llorens , in his capacity as Lead Director.

[2] Directors appointed by the General Shareholders’ Meeting held on 13 March 2020. Remunerations paid based on the date on which the position was accepted.

[3] Includes remuneration paid for mem bership on the Board and its various committees during the 2020 financial year. The composition of these committees was amended by resolution of the Board of Directors dated 29 April 2020.