v3.26.1
Risk management - Disclosure of credit and concentration risk (Details)
€ in Millions
Dec. 31, 2025
EUR (€)
Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure € 305,156
Credit risk  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 1,792,549
Credit risk | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 352,126
Credit risk | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 378,314
Credit risk | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 660,879
Credit risk | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 401,230
Credit risk | Central banks and Credit institutions  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 326,316
Credit risk | Central banks and Credit institutions | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 61,256
Credit risk | Central banks and Credit institutions | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 71,853
Credit risk | Central banks and Credit institutions | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 119,532
Credit risk | Central banks and Credit institutions | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 73,675
Credit risk | Public sector  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 267,765
Credit risk | Public sector | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 82,131
Credit risk | Public sector | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 62,620
Credit risk | Public sector | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 109,109
Credit risk | Public sector | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 13,905
Credit risk | Central government  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 239,153
Credit risk | Central government | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 66,479
Credit risk | Central government | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 57,468
Credit risk | Central government | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 101,768
Credit risk | Central government | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 13,438
Credit risk | Other central government  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 28,612
Credit risk | Other central government | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 15,652
Credit risk | Other central government | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 5,152
Credit risk | Other central government | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 7,341
Credit risk | Other central government | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 467
Credit risk | Other financial institutions (financial business activity)  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 207,044
Credit risk | Other financial institutions (financial business activity) | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 16,301
Credit risk | Other financial institutions (financial business activity) | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 50,819
Credit risk | Other financial institutions (financial business activity) | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 101,600
Credit risk | Other financial institutions (financial business activity) | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 38,324
Credit risk | Non-financial corporations and individual entrepreneurs (non-financial business activity)  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 447,496
Credit risk | Non-financial corporations and individual entrepreneurs (non-financial business activity) | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 103,836
Credit risk | Non-financial corporations and individual entrepreneurs (non-financial business activity) | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 94,760
Credit risk | Non-financial corporations and individual entrepreneurs (non-financial business activity) | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 188,078
Credit risk | Non-financial corporations and individual entrepreneurs (non-financial business activity) | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 60,822
Credit risk | Construction and property development  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 20,322
Credit risk | Construction and property development | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 4,130
Credit risk | Construction and property development | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 2,090
Credit risk | Construction and property development | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 9,396
Credit risk | Construction and property development | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 4,706
Credit risk | Civil engineering construction  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 5,128
Credit risk | Civil engineering construction | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 1,835
Credit risk | Civil engineering construction | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 1,740
Credit risk | Civil engineering construction | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 1,468
Credit risk | Civil engineering construction | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 85
Credit risk | Large companies  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 291,515
Credit risk | Large companies | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 53,841
Credit risk | Large companies | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 63,635
Credit risk | Large companies | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 127,003
Credit risk | Large companies | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 47,036
Credit risk | SMEs and individual entrepreneurs  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 130,531
Credit risk | SMEs and individual entrepreneurs | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 44,030
Credit risk | SMEs and individual entrepreneurs | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 27,295
Credit risk | SMEs and individual entrepreneurs | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 50,211
Credit risk | SMEs and individual entrepreneurs | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 8,995
Credit risk | Households - other  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 543,928
Credit risk | Households - other | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 88,602
Credit risk | Households - other | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 98,262
Credit risk | Households - other | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 142,560
Credit risk | Households - other | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 214,504
Credit risk | Residential  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 333,552
Credit risk | Residential | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 61,818
Credit risk | Residential | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 27,030
Credit risk | Residential | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 46,605
Credit risk | Residential | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 198,099
Credit risk | Consumer loans  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 192,746
Credit risk | Consumer loans | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 19,784
Credit risk | Consumer loans | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 69,670
Credit risk | Consumer loans | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 87,491
Credit risk | Consumer loans | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 15,801
Credit risk | Other purposes  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 17,630
Credit risk | Other purposes | Spain  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 7,000
Credit risk | Other purposes | Other EU countries  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 1,562
Credit risk | Other purposes | America  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure 8,464
Credit risk | Other purposes | Rest of the world  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Risk exposure € 604