v3.25.4
Note 7 Loans and advances breakdown by counterparty and product (Details) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
On demand [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product € 6,192 € 5,307 € 3,040
Credit card debt [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 30,651 27,721 22,890
Commercial debtors [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 34,426 31,764 25,171
Finance leases [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 10,610 10,125 9,463
Reverse repurchase loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 8,864 9,420 7,223
Other term loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 392,469 347,102 322,683
Advances that are not loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 13,292 12,330 12,116
Total loans and advances by products [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 496,503 443,769 402,586
Of which mortagage loans collateralized by immovable property [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 134,624 127,860 122,397
Of which other collateralized loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 30,715 29,861 26,671
Of which credit for consumption [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 74,965 67,446 59,892
Of which lending for house purchase [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 103,397 98,570 97,555
Of which project finance loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 5,579 6,669 7,181
Central banks [Member] | On demand [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 0
Central banks [Member] | Credit card debt [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product   0 0
Central banks [Member] | Finance leases [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 0
Central banks [Member] | Reverse repurchase loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 1,345
Central banks [Member] | Other term loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 10,141 7,803 4,878
Central banks [Member] | Advances that are not loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 727 452 927
Central banks [Member] | Total loans and advances by products [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 10,869 8,255 7,151
Central banks [Member] | Of which other collateralized loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 1,347
Government [member] | On demand [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 9 8 6
Government [member] | Credit card debt [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 1 1 1
Government [member] | Commercial debtors [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 1,019 1,077 960
Government [member] | Finance leases [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 162 171 225
Government [member] | Reverse repurchase loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 181 219 0
Government [member] | Other term loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 23,871 20,519 21,662
Government [member] | Advances that are not loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 665 117 412
Government [member] | Total loans and advances by products [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 25,907 22,111 23,265
Government [member] | Of which mortagage loans collateralized by immovable property [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 213 245 271
Government [member] | Of which other collateralized loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 6,530 6,059 6,933
credit institutions [Member] | On demand [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 0
credit institutions [Member] | Credit card debt [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 0
credit institutions [Member] | Commercial debtors [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 135 71 76
credit institutions [Member] | Finance leases [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 0
credit institutions [Member] | Reverse repurchase loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 8,120 9,157 5,786
credit institutions [Member] | Other term loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 10,418 7,529 5,329
credit institutions [Member] | Advances that are not loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 5,704 5,960 6,312
credit institutions [Member] | Total loans and advances by products [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 24,377 22,719 17,502
credit institutions [Member] | Of which mortagage loans collateralized by immovable property [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 0
credit institutions [Member] | Of which other collateralized loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 8,628 9,628 4,558
Other financial corporations [Member] | On demand [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 24 59 73
Other financial corporations [Member] | Credit card debt [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 4 3 2
Other financial corporations [Member] | Commercial debtors [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 1,600 1,244 586
Other financial corporations [Member] | Finance leases [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 18 11 12
Other financial corporations [Member] | Reverse repurchase loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 563 44 92
Other financial corporations [Member] | Other term loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 17,027 11,771 9,300
Other financial corporations [Member] | Advances that are not loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 4,286 4,365 3,186
Other financial corporations [Member] | Total loans and advances by products [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 23,522 17,497 13,251
Other financial corporations [Member] | Of which mortagage loans collateralized by immovable property [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 889 680 526
Other financial corporations [Member] | Of which other collateralized loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 624 530 465
Non financial corporations [Member] | On demand [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 3,424 3,140 1,933
Non financial corporations [Member] | Credit card debt [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 2,585 2,268 1,927
Non financial corporations [Member] | Commercial debtors [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 31,541 29,247 23,462
Non financial corporations [Member] | Finance leases [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 10,166 9,672 8,940
Non financial corporations [Member] | Reverse repurchase loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 0
Non financial corporations [Member] | Other term loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 168,758 148,167 134,024
Non financial corporations [Member] | Advances that are not loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 1,530 1,084 956
Non financial corporations [Member] | Total loans and advances by products [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 218,004 193,579 171,241
Non financial corporations [Member] | Of which mortagage loans collateralized by immovable property [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 31,091 29,307 24,829
Non financial corporations [Member] | Of which other collateralized loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 11,963 10,996 10,938
Non financial corporations [Member] | Of which project finance loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 5,579 6,669 7,181
Households [Member] | On demand [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 2,735 2,099 1,028
Households [Member] | Credit card debt [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 28,061 25,449 20,959
Households [Member] | Commercial debtors [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 131 125 88
Households [Member] | Finance leases [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 263 270 285
Households [Member] | Reverse repurchase loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 0 0 0
Households [Member] | Other term loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 162,253 151,313 147,491
Households [Member] | Advances that are not loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 380 353 324
Households [Member] | Total loans and advances by products [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 193,824 179,610 170,175
Households [Member] | Of which mortagage loans collateralized by immovable property [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 102,431 97,627 96,772
Households [Member] | Of which other collateralized loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 2,970 2,648 2,430
Households [Member] | Of which credit for consumption [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 74,965 67,446 59,892
Households [Member] | Of which lending for house purchase [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 103,397 98,570 97,555
Gross Carrying Amount [Member] | On demand [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 6,479 5,521 3,175
Gross Carrying Amount [Member] | Credit card debt [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 33,113 29,669 24,454
Gross Carrying Amount [Member] | Commercial debtors [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 34,723 32,023 25,346
Gross Carrying Amount [Member] | Finance leases [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 10,862 10,364 9,714
Gross Carrying Amount [Member] | Reverse repurchase loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 8,865 9,422 7,234
Gross Carrying Amount [Member] | Other term loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 401,489 356,002 331,813
Gross Carrying Amount [Member] | Advances that are not loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 13,342 12,397 12,164
Gross Carrying Amount [Member] | Total loans and advances by products [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 508,872 455,399 413,901
Gross Carrying Amount [Member] | Of which mortagage loans collateralized by immovable property [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 137,107 130,633 125,328
Gross Carrying Amount [Member] | Of which other collateralized loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 30,955 30,129 26,963
Gross Carrying Amount [Member] | Of which credit for consumption [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 80,560 72,447 64,303
Gross Carrying Amount [Member] | Of which lending for house purchase [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product 104,890 100,218 99,224
Gross Carrying Amount [Member] | Of which project finance loans [Member]      
Breakdown by counterparty and product [Line Items]      
Loans and advances by counterparty and product € 5,663 € 6,901 € 7,743