v3.26.1
Remuneration and other benefits paid to the Bank’s directors and senior managers - Schedule summarising maximum number of shares to be delivered and actual number of shares delivered, former Directors (Details) - Retired executive directors - shares
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Deferred conditional variable remuneration plan and linked to objectives (2018)    
Disclosure of transactions between related parties [line items]    
Number of shares delivered (in shares) 0 29,860
Deferred conditional variable remuneration plan and linked to objectives (2019)    
Disclosure of transactions between related parties [line items]    
Number of shares delivered (in shares) 24,490 24,490
Deferred conditional variable remuneration plan and linked to objectives (2019) | Maximum    
Disclosure of transactions between related parties [line items]    
Maximum number of shares to be delivered (in shares) 0 24,490
Deferred conditional variable remuneration plan and linked to objectives (2020)    
Disclosure of transactions between related parties [line items]    
Number of shares delivered (in shares) 35,512 35,512
Deferred conditional variable remuneration plan and linked to objectives (2020) | Maximum    
Disclosure of transactions between related parties [line items]    
Maximum number of shares to be delivered (in shares) 35,511 71,024
Deferred conditional variable remuneration plan and linked to objectives (2021)    
Disclosure of transactions between related parties [line items]    
Number of shares delivered (in shares) 68,700 12,911
Deferred conditional variable remuneration plan and linked to objectives (2021) | Maximum    
Disclosure of transactions between related parties [line items]    
Maximum number of shares to be delivered (in shares) 137,400 206,100