v3.26.1
Non-current assets held for sale and liabilities associated with non-current assets held for sale - Discontinued operations, Condensed financial statements (Details) - EUR (€)
€ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
ASSETS      
Cash, cash balances at central banks and other deposits on demand € 138,008 € 175,555 € 152,281
Financial assets held for trading 286,941   252,318
Financial assets designated at fair value through other comprehensive income 75,371   74,612
Financial assets at amortised cost 1,334,351   1,202,689
Intangible assets 5,629   5,350
Tax assets 31,478   30,076
Other assets 11,798   8,719
TOTAL ASSETS 1,954,465   1,867,515
LIABILITIES      
Financial liabilities held for trading 193,417   171,546
Financial liabilities at amortised cost 1,543,776   1,421,184
Provisions 9,211   8,355
Tax liabilities 9,784   9,568
Other liabilities 15,182   15,937
TOTAL LIABILITIES 1,838,567   1,754,767
Statement of comprehensive income [abstract]      
Items not reclassified to profit or loss (3,160)   (4,121)
Actuarial gains or losses on defined benefit pension plans (3,895)   (3,896)
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income 744   (250)
Items that may be reclassified to profit or loss (30,753)   (33,853)
Hedge of net investments in foreign operations (effective portion) (8,181)   (7,343)
Exchange differences (21,864)   (25,475)
Cash flow hedges (effective portion) 154   333
Debt instruments at fair value with changes in other comprehensive income (577)   (372)
Share in other income and expenses recognised in investments, joint ventures and associates (307)   (395)
Income Statement [Abstract]      
Interest Margin 22,711 21,211  
Dividend income 624 471  
Investments accounted for using the equity method 476 332  
Total income 30,822 28,978  
Operating profit/(loss) before tax 9,961 9,104  
Tax expense (2,442) (2,367)  
Profit/(loss) for the period 9,414 7,463  
Statement of cash flows [abstract]      
Effect of exchange rate changes on cash and cash equivalents 1,955 (8,185)  
Santander Bank Polska SA      
Statement of cash flows [abstract]      
Cash flows from operating activities   430  
Cash flows from investing activities   (11)  
Cash flows from financing activities   (466)  
Net increase/(decrease) in cash and cash equivalents   (38)  
Discontinued operations | Santander Bank Polska SA      
ASSETS      
Cash, cash balances at central banks and other deposits on demand     2,515
Financial assets held for trading     1,956
Financial assets designated at fair value through other comprehensive income     8,173
Financial assets at amortised cost     55,642
Intangible assets     1,335
Tax assets     1,224
Other assets     1,303
TOTAL ASSETS     72,148
LIABILITIES      
Financial liabilities held for trading     842
Financial liabilities at amortised cost     59,704
Provisions     603
Tax liabilities     1,335
Other liabilities     511
TOTAL LIABILITIES     62,995
Statement of comprehensive income [abstract]      
Items not reclassified to profit or loss     56
Actuarial gains or losses on defined benefit pension plans     0
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income     56
Items that may be reclassified to profit or loss     (590)
Hedge of net investments in foreign operations (effective portion)     (522)
Exchange differences     (164)
Cash flow hedges (effective portion)     98
Debt instruments at fair value with changes in other comprehensive income     8
Share in other income and expenses recognised in investments, joint ventures and associates     € (10)
Income Statement [Abstract]      
Interest Margin   1,505  
Dividend income   3  
Investments accounted for using the equity method   14  
Net commissions   342  
Net trading income   37  
Other operating results   (73)  
Total income   1,828  
Administrative expenses, depreciation and amortisation cost   (501)  
Impairment of financial assets   (121)  
Other results and provisions   (243)  
Operating profit/(loss) before tax   963  
Tax expense   (237)  
Profit/(loss) for the period   726  
Statement of cash flows [abstract]      
Effect of exchange rate changes on cash and cash equivalents   9  
Effect on net cash outflows from discontinued operations [abstract]      
Cash and cash equivalents disposed of (2,515)    
Consideration received satisfied in cash - Santander Bank Polska € 7,035    
Discontinued operations | Santander Bank Polska SA | Renegotiation and contractual modifications      
Income Statement [Abstract]      
Impairment of financial assets   € (63)