v3.26.1
Staff costs - Schedule of deferred variable remuneration systems, deferred and conditional variable remuneration plan (Details)
€ in Millions
 12 Months Ended
Dec. 31, 2025
EUR (€)
companies
Share-based payment arrangement  
Deferral period 5 years
Immediate payment percentage 40.00%
Deferred payment percentage 60.00%
Minimum Group's economic capital 1.00%
Deferred conditional variable remuneration plan sixth cycle  
Share-based payment arrangement  
Deferral period 3 years
Immediate payment percentage 60.00%
Deferred payment percentage 40.00%
Deferred conditional variable remuneration plan twelfth cycle | Other beneficiaries  
Share-based payment arrangement  
Deferral period 4 years
Immediate payment percentage 60.00%
Deferred payment percentage 40.00%
Deferred conditional variable remuneration plan twelfth cycle | Beneficiaries with target total variable remuneration higher or equal to 2.7 million euros  
Share-based payment arrangement  
Deferral period 5 years
Gross variable remuneration benchmark threshold € 2.7
Immediate payment percentage 40.00%
Deferred payment percentage 60.00%
Deferred conditional variable remuneration plan twelfth cycle | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Deferral period 5 years
Immediate payment percentage 50.00%
Deferred payment percentage 50.00%
Deferred conditional variable remuneration plan fourth and fifth cycles | Executive directors and members of identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Immediate payment percentage 40.00%
Deferred payment percentage 60.00%
Deferred conditional variable remuneration plan fourth and fifth cycles | Senior managers, country heads, other executives and identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Immediate payment percentage 50.00%
Deferred payment percentage 50.00%
Deferred conditional variable remuneration plan fourth and fifth cycles | Other beneficiaries  
Share-based payment arrangement  
Deferral period 3 years
Immediate payment percentage 60.00%
Deferred payment percentage 40.00%
Deferred conditional variable remuneration plan fifth cycle | Executive directors and members of identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Deferral period 5 years
Gross variable remuneration benchmark threshold € 2.6
Deferred conditional variable remuneration plan fifth cycle | Senior managers, country heads, other executives and identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Deferral period 5 years
Deferred conditional variable remuneration plan seventh, eighth, ninth, tenth and eleventh cycles | Other beneficiaries  
Share-based payment arrangement  
Deferral period 3 years
Deferred payment percentage 40.00%
Deferred conditional variable remuneration plan seventh, eighth, ninth, tenth and eleventh cycles | Beneficiaries with target total variable remuneration higher or equal to 2.7 million euros  
Share-based payment arrangement  
Deferral period 5 years
Gross variable remuneration benchmark threshold € 2.7
Immediate payment percentage 40.00%
Deferred payment percentage 60.00%
Deferred conditional variable remuneration plan seventh, eighth, ninth, tenth and eleventh cycles | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Deferral period 5 years
Immediate payment percentage 50.00%
Deferred multiyear objectives variable remuneration plan seventh cycle  
Share-based payment arrangement  
Number of credit institutions included in reference group | companies 9
Deferred multiyear objectives variable remuneration plan seventh cycle | Executive directors  
Share-based payment arrangement  
Deferred payment, percentage paid in share options 25.00%
Deferred payment, percentage paid in shares 25.00%
Deferred variable compensation plan linked to multiannual objectives  
Share-based payment arrangement  
Deferral period 5 years
Deferred payment percentage 60.00%
Deferred payment, percentage paid in shares 60.00%
Deferred multiyear objectives variable remuneration plan first cycle | Executive directors and members of identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Deferral period 5 years
Gross variable remuneration benchmark threshold € 2.7
Immediate payment percentage 40.00%
Deferred payment percentage 60.00%
Deferred multiyear objectives variable remuneration plan first cycle | Senior managers, country heads, other executives and identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Deferral period 5 years
Immediate payment percentage 50.00%
Deferred payment percentage 50.00%
Deferred multiyear objectives variable remuneration plan first cycle | Other beneficiaries  
Share-based payment arrangement  
Deferral period 3 years
Immediate payment percentage 60.00%
Deferred payment percentage 40.00%
Deferred Conditional Variable Remuneration Plan Twelfth Cycle 2023 | Other beneficiaries  
Share-based payment arrangement  
Deferral period 4 years
Immediate payment percentage 60.00%
Deferred payment percentage 40.00%
Deferred Conditional Variable Remuneration Plan Twelfth Cycle 2023 | Beneficiaries with target total variable remuneration higher or equal to 2.7 million euros  
Share-based payment arrangement  
Deferral period 5 years
Gross variable remuneration benchmark threshold € 2.7
Immediate payment percentage 40.00%
Deferred payment percentage 60.00%
Deferred Conditional Variable Remuneration Plan Twelfth Cycle 2023 | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Deferral period 5 years
Immediate payment percentage 50.00%
Deferred payment percentage 50.00%
Deferred Multiyear Objectives Variable Remuneration Plan Eighth Cycle  
Share-based payment arrangement  
Number of credit institutions included in reference group | companies 9
Deferred Multiyear Objectives Variable Remuneration Plan Eighth Cycle | Executive directors  
Share-based payment arrangement  
Deferred payment, percentage paid in share options 25.00%
Deferred payment, percentage paid in shares 25.00%
Deferred Conditional Variable Remuneration Plan Fourteenth Cycle 2024 | Other beneficiaries  
Share-based payment arrangement  
Deferral period 4 years
Immediate payment percentage 60.00%
Deferred payment percentage 40.00%
Deferred Conditional Variable Remuneration Plan Fourteenth Cycle 2024 | Beneficiaries with target total variable remuneration higher or equal to 2.7 million euros  
Share-based payment arrangement  
Deferral period 5 years
Gross variable remuneration benchmark threshold € 2.7
Immediate payment percentage 40.00%
Deferred payment percentage 60.00%
Deferred Conditional Variable Remuneration Plan Fourteenth Cycle 2024 | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Deferral period 5 years
Immediate payment percentage 50.00%
Deferred payment percentage 50.00%
Deferred Multiyear Objectives Variable Remuneration Plan Ninth Cycle  
Share-based payment arrangement  
Number of credit institutions included in reference group | companies 9
Minimum | Deferred conditional variable remuneration plan fifth, seventh, eighth, ninth, tenth, and eleventh cycles  
Share-based payment arrangement  
Deferral period 3 years
Minimum | Deferred conditional variable remuneration plan twelfth cycle  
Share-based payment arrangement  
Deferral period 4 years
Minimum | Deferred conditional variable remuneration plan twelfth cycle | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 1.7
Minimum | Deferred conditional variable remuneration plan fourth and fifth cycles | Senior managers, country heads, other executives and identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold 1.7
Minimum | Deferred conditional variable remuneration plan fourth cycle | Senior managers, country heads, other executives and identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold 1.8
Minimum | Deferred conditional variable remuneration plan seventh, eighth, ninth, tenth and eleventh cycles | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 1.7
Minimum | Deferred multiyear objectives variable remuneration plan seventh cycle  
Share-based payment arrangement  
Deferral period 4 years
Minimum | Deferred variable compensation plan linked to multiannual objectives  
Share-based payment arrangement  
Deferral period 3 years
Minimum | Deferred multiyear objectives variable remuneration plan first cycle | Senior managers, country heads, other executives and identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 1.7
Minimum | Deferred Conditional Variable Remuneration Plan Twelfth Cycle 2023 | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 1.7
Minimum | Deferred Multiyear Objectives Variable Remuneration Plan Eighth Cycle  
Share-based payment arrangement  
Deferral period 4 years
Minimum | Deferred Conditional Variable Remuneration Plan Fourteenth Cycle 2024 | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 1.7
Minimum | Deferred Multiyear Objectives Variable Remuneration Plan Ninth Cycle  
Share-based payment arrangement  
Deferral period 4 years
Minimum | Deferred Multiyear Objectives Variable Remuneration Plan Tenth Cycle  
Share-based payment arrangement  
Deferral period 4 years
Maximum | Deferred conditional variable remuneration plan fifth, seventh, eighth, ninth, tenth, and eleventh cycles  
Share-based payment arrangement  
Deferral period 5 years
Maximum | Deferred conditional variable remuneration plan twelfth cycle  
Share-based payment arrangement  
Deferral period 5 years
Maximum | Deferred conditional variable remuneration plan twelfth cycle | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 2.7
Maximum | Deferred conditional variable remuneration plan fifth cycle | Senior managers, country heads, other executives and identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold 2.6
Maximum | Deferred conditional variable remuneration plan seventh, eighth, ninth, tenth and eleventh cycles | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 2.7
Maximum | Deferred multiyear objectives variable remuneration plan seventh cycle  
Share-based payment arrangement  
Deferral period 5 years
Maximum | Deferred variable compensation plan linked to multiannual objectives  
Share-based payment arrangement  
Deferral period 5 years
Maximum | Deferred multiyear objectives variable remuneration plan first cycle | Senior managers, country heads, other executives and identified staff with total variable remuneration specified amount  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 2.7
Maximum | Deferred Conditional Variable Remuneration Plan Twelfth Cycle 2023 | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 2.7
Maximum | Deferred Multiyear Objectives Variable Remuneration Plan Eighth Cycle  
Share-based payment arrangement  
Deferral period 5 years
Maximum | Deferred Conditional Variable Remuneration Plan Fourteenth Cycle 2024 | Beneficiaries with target total variable remuneration between 1.7 and 2.7 million euros  
Share-based payment arrangement  
Gross variable remuneration benchmark threshold € 2.7
Maximum | Deferred Multiyear Objectives Variable Remuneration Plan Ninth Cycle  
Share-based payment arrangement  
Deferral period 5 years
Maximum | Deferred Multiyear Objectives Variable Remuneration Plan Tenth Cycle  
Share-based payment arrangement  
Deferral period 5 years