v3.26.1
Remuneration and other benefits paid to the Bank’s directors and senior managers - Schedule summarising short-term remuneration (excluding remuneration subject to long-term objectives), Directors (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of transactions between related parties [line items]    
Fixed € 6,585 € 6,585
Variable - immediate payment in cash 3,387 3,130
Variable - immediate payment in instruments 3,387 3,130
Deferred variable in cash 1,693 1,877
Deferred variable in instruments 1,694 1,879
Total 16,746 16,601
Pension contribution 2,461 2,444
Other remuneration 5,001 5,815
Total 29,462 30,214
Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 1,047 1,240
Ana Botín    
Disclosure of transactions between related parties [line items]    
Fixed 3,435  
Variable - immediate payment in cash 2,003  
Variable - immediate payment in instruments 2,003  
Deferred variable in cash 1,001  
Deferred variable in instruments 1,002  
Total 9,444  
Pension contribution 1,341  
Other remuneration 843  
Total 11,977 12,127
Ana Botín | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
Héctor Grisi    
Disclosure of transactions between related parties [line items]    
Fixed 3,150  
Variable - immediate payment in cash 1,384  
Variable - immediate payment in instruments 1,384  
Deferred variable in cash 692  
Deferred variable in instruments 692  
Total 7,302  
Pension contribution 1,120  
Other remuneration 718  
Total 9,489 9,137
Héctor Grisi | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
José Antonio Álvarez    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 2,440  
Total 2,887 3,698
José Antonio Álvarez | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 67  
Glenn Hutchins    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 700 700
Glenn Hutchins | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 78  
Homaira Akbari    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 284 285
Homaira Akbari | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 81  
Javier Botín    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 137 144
Javier Botín | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 36  
Sol Daurella    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 314 292
Sol Daurella | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 75  
Henrique de Castro    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 283 300
Henrique de Castro | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 80  
Gina Díez    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 222 225
Gina Díez | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 63  
Luis Isasi    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 1,000  
Total 1,423 1,440
Luis Isasi | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 74  
Belén Romana    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 581 599
Belén Romana | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 107  
Pamela Walkden    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 383 381
Pamela Walkden | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 93  
Germán de la Fuente    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 344 338
Germán de la Fuente | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 83  
Carlos Barrabés    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 259 128
Carlos Barrabés | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 71  
Antonio Weiss    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 180 72
Antonio Weiss | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 50  
Bruce Carnegie Brown    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 0 78
Bruce Carnegie Brown | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Ramiro Mato    
Disclosure of transactions between related parties [line items]    
Fixed 0  
Variable - immediate payment in cash 0  
Variable - immediate payment in instruments 0  
Deferred variable in cash 0  
Deferred variable in instruments 0  
Total 0  
Pension contribution 0  
Other remuneration 0  
Total 0 271
Ramiro Mato | Attendance Fees And Commissions    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Board of directors    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 1,857 1,791
Board of directors | Ana Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Héctor Grisi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | José Antonio Álvarez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 132  
Compensation received , life and health insurance contribution 678  
Compensation received for having waived the death and disability policy 12  
Board of directors | Glenn Hutchins    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 412  
Board of directors | Homaira Akbari    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Javier Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Sol Daurella    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Henrique de Castro    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Gina Díez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Luis Isasi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Luis Isasi | Santander Spain    
Disclosure of transactions between related parties [line items]    
Compensation received as representative from subsidiary 1,000  
Board of directors | Belén Romana    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Pamela Walkden    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Germán de la Fuente    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Carlos Barrabés    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Antonio Weiss    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Board of directors | Bruce Carnegie Brown    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Board of directors | Ramiro Mato    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 875 933
Executive committee | Ana Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 175  
Executive committee | Héctor Grisi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 175  
Executive committee | José Antonio Álvarez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 175  
Executive committee | Glenn Hutchins    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Homaira Akbari    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Javier Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Sol Daurella    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Henrique de Castro    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Gina Díez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Luis Isasi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 175  
Executive committee | Belén Romana    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 175  
Executive committee | Pamela Walkden    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Germán de la Fuente    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Carlos Barrabés    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Antonio Weiss    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Bruce Carnegie Brown    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Executive committee | Ramiro Mato    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 292 306
Audit committee | Ana Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Héctor Grisi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | José Antonio Álvarez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Glenn Hutchins    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Homaira Akbari    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
Audit committee | Javier Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Sol Daurella    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Henrique de Castro    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
Audit committee | Gina Díez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Luis Isasi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Belén Romana    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
Audit committee | Pamela Walkden    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
Audit committee | Germán de la Fuente    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 116  
Audit committee | Carlos Barrabés    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Antonio Weiss    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Bruce Carnegie Brown    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Audit committee | Ramiro Mato    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 196 183
Nomination committee | Ana Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Héctor Grisi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | José Antonio Álvarez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Glenn Hutchins    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Nomination committee | Homaira Akbari    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Javier Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Sol Daurella    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Nomination committee | Henrique de Castro    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Gina Díez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Nomination committee | Luis Isasi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Belén Romana    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 80  
Nomination committee | Pamela Walkden    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Germán de la Fuente    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Carlos Barrabés    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Nomination committee | Antonio Weiss    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Bruce Carnegie Brown    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Nomination committee | Ramiro Mato    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 196 168
Remuneration committee | Ana Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Héctor Grisi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | José Antonio Álvarez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Glenn Hutchins    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 80  
Remuneration committee | Homaira Akbari    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Javier Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Sol Daurella    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Remuneration committee | Henrique de Castro    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Remuneration committee | Gina Díez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Luis Isasi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Remuneration committee | Belén Romana    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Pamela Walkden    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Germán de la Fuente    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Carlos Barrabés    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Antonio Weiss    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Remuneration committee | Bruce Carnegie Brown    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Remuneration committee | Ramiro Mato    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 292 263
Risk supervision, regulation and compliance oversight committee | Ana Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Héctor Grisi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | José Antonio Álvarez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
Risk supervision, regulation and compliance oversight committee | Glenn Hutchins    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Homaira Akbari    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Javier Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Sol Daurella    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Henrique de Castro    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Gina Díez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Luis Isasi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
Risk supervision, regulation and compliance oversight committee | Belén Romana    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
Risk supervision, regulation and compliance oversight committee | Pamela Walkden    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 116  
Risk supervision, regulation and compliance oversight committee | Germán de la Fuente    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 44  
Risk supervision, regulation and compliance oversight committee | Carlos Barrabés    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Antonio Weiss    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Bruce Carnegie Brown    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Risk supervision, regulation and compliance oversight committee | Ramiro Mato    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 196 190
Responsible banking, sustainability and culture committee | Ana Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Héctor Grisi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | José Antonio Álvarez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Glenn Hutchins    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Homaira Akbari    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Responsible banking, sustainability and culture committee | Javier Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Sol Daurella    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 80  
Responsible banking, sustainability and culture committee | Henrique de Castro    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Gina Díez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Responsible banking, sustainability and culture committee | Luis Isasi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Belén Romana    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Pamela Walkden    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Responsible banking, sustainability and culture committee | Germán de la Fuente    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Carlos Barrabés    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Responsible banking, sustainability and culture committee | Antonio Weiss    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Bruce Carnegie Brown    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Responsible banking, sustainability and culture committee | Ramiro Mato    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Innovation and technology committee    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 304 € 280
Innovation and technology committee | Ana Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Innovation and technology committee | Héctor Grisi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Innovation and technology committee | José Antonio Álvarez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Innovation and technology committee | Glenn Hutchins    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 101  
Innovation and technology committee | Homaira Akbari    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Innovation and technology committee | Javier Botín    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Innovation and technology committee | Sol Daurella    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Innovation and technology committee | Henrique de Castro    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Innovation and technology committee | Gina Díez    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Innovation and technology committee | Luis Isasi    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Innovation and technology committee | Belén Romana    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Innovation and technology committee | Pamela Walkden    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Innovation and technology committee | Germán de la Fuente    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Innovation and technology committee | Carlos Barrabés    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 29  
Innovation and technology committee | Antonio Weiss    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Innovation and technology committee | Bruce Carnegie Brown    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation 0  
Innovation and technology committee | Ramiro Mato    
Disclosure of transactions between related parties [line items]    
Key management personnel compensation € 0