v3.26.1
Distribution of Banco Santander's profit, shareholder remuneration scheme and earnings per share - Schedule of distribution of the Bank's net profit (Details) - EUR (€)
 1 Months Ended 8 Months Ended 12 Months Ended
Feb. 24, 2026
May 02, 2025
Nov. 30, 2025
Aug. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Profit Distribution [Line Items]              
Dividends paid in cash       € 0 € 4,237,000,000 € 3,677,000,000 € 3,009,000,000
Profit or loss for the year         15,500,000,000 € 13,744,000,000 € 12,183,000,000
Interim dividend              
Profit Distribution [Line Items]              
Dividends per share (in eur per share)     € 0.115        
Complementary dividend              
Profit Distribution [Line Items]              
Dividends per share (in eur per share)   € 0.11          
Dividends proposed, total per share (in eur per share) € 0.125            
Banco Santander, S.A.              
Profit Distribution [Line Items]              
Dividends paid in cash         3,520,000,000    
To voluntary reserves         7,593,000,000    
Profit or loss for the year         € 11,113,000,000    
Number of shares outstanding, entitled to receive dividend         14,568,470,446    
Banco Santander, S.A. | Interim dividend              
Profit Distribution [Line Items]              
Dividends paid in cash         € 1,699,000,000    
Dividends per share (in eur per share)         € 0.115    
Banco Santander, S.A. | Complementary dividend              
Profit Distribution [Line Items]              
Dividends paid in cash         € 1,821,058,805.75    
Dividends proposed, total per share (in eur per share)         € 0.125