v3.26.1
Other disclosures - Schedule of forborne loans (Details) - Credit risk
€ in Millions
Jun. 30, 2026
EUR (€)
contract
Dec. 31, 2025
EUR (€)
contract
Forborne loan portfolio | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 3,336,909 3,490,210
Forborne loan portfolio | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 815,531 558,424
Forborne loan portfolio | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 7,338 € 7,145
Forborne loan portfolio | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 5,204 € 4,715
Forborne loan portfolio | Credit entities | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 0 0
Forborne loan portfolio | Credit entities | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 0 0
Forborne loan portfolio | Credit entities | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 0 € 0
Forborne loan portfolio | Credit entities | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 0 € 0
Forborne loan portfolio | Public sector | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 11 14
Forborne loan portfolio | Public sector | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 5 9
Forborne loan portfolio | Public sector | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 2 € 5
Forborne loan portfolio | Public sector | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 0 € 0
Forborne loan portfolio | Other financial institutions and: individual shareholder | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 1,212 933
Forborne loan portfolio | Other financial institutions and: individual shareholder | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 464 462
Forborne loan portfolio | Other financial institutions and: individual shareholder | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 71 € 117
Forborne loan portfolio | Other financial institutions and: individual shareholder | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 14 € 15
Forborne loan portfolio | Non financial institutions and individual shareholder | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 573,286 489,192
Forborne loan portfolio | Non financial institutions and individual shareholder | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 157,022 42,700
Forborne loan portfolio | Non financial institutions and individual shareholder | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 3,434 € 3,271
Forborne loan portfolio | Non financial institutions and individual shareholder | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 893 € 923
Forborne loan portfolio | Of which: Financing for constructions and property development | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 194 249
Forborne loan portfolio | Of which: Financing for constructions and property development | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 559 523
Forborne loan portfolio | Of which: Financing for constructions and property development | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 733 € 695
Forborne loan portfolio | Of which: Financing for constructions and property development | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 1 € 4
Forborne loan portfolio | Other warehouses | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 2,762,400 3,000,071
Forborne loan portfolio | Other warehouses | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 658,040 515,253
Forborne loan portfolio | Other warehouses | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 3,831 € 3,752
Forborne loan portfolio | Other warehouses | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 4,297 € 3,777
Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 0 13,499
Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 0 4,630
Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 0 € 406
Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered 0 14
Gross carrying amount | Forborne loan portfolio | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 10,956 9,751
Gross carrying amount | Forborne loan portfolio | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 16,397 15,484
Gross carrying amount | Forborne loan portfolio | Credit entities | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 0
Gross carrying amount | Forborne loan portfolio | Credit entities | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 0
Gross carrying amount | Forborne loan portfolio | Public sector | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 5 6
Gross carrying amount | Forborne loan portfolio | Public sector | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 3 7
Gross carrying amount | Forborne loan portfolio | Other financial institutions and: individual shareholder | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 100 94
Gross carrying amount | Forborne loan portfolio | Other financial institutions and: individual shareholder | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 121 182
Gross carrying amount | Forborne loan portfolio | Non financial institutions and individual shareholder | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 5,932 5,095
Gross carrying amount | Forborne loan portfolio | Non financial institutions and individual shareholder | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 5,784 5,596
Gross carrying amount | Forborne loan portfolio | Of which: Financing for constructions and property development | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 3 21
Gross carrying amount | Forborne loan portfolio | Of which: Financing for constructions and property development | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 816 739
Gross carrying amount | Forborne loan portfolio | Other warehouses | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 4,919 4,556
Gross carrying amount | Forborne loan portfolio | Other warehouses | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 10,489 9,699
Gross carrying amount | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 261
Gross carrying amount | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 566
Accumulated impairment | Forborne loan portfolio | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 6,855 6,480
Accumulated impairment | Forborne loan portfolio | Credit entities | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 0
Accumulated impairment | Forborne loan portfolio | Public sector | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 3 8
Accumulated impairment | Forborne loan portfolio | Other financial institutions and: individual shareholder | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 51 94
Accumulated impairment | Forborne loan portfolio | Non financial institutions and individual shareholder | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 2,754 2,713
Accumulated impairment | Forborne loan portfolio | Of which: Financing for constructions and property development | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 69 75
Accumulated impairment | Forborne loan portfolio | Other warehouses | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 4,047 3,665
Accumulated impairment | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets € 0 € 171
Credit impaired | Forborne loan portfolio | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 1,690,106 1,916,935
Credit impaired | Forborne loan portfolio | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 481,141 323,505
Credit impaired | Forborne loan portfolio | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 3,018 € 2,923
Credit impaired | Forborne loan portfolio | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 2,980 € 2,663
Credit impaired | Forborne loan portfolio | Credit entities | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 0 0
Credit impaired | Forborne loan portfolio | Credit entities | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 0 0
Credit impaired | Forborne loan portfolio | Credit entities | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 0 € 0
Credit impaired | Forborne loan portfolio | Credit entities | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 0 € 0
Credit impaired | Forborne loan portfolio | Public sector | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 5 5
Credit impaired | Forborne loan portfolio | Public sector | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 5 9
Credit impaired | Forborne loan portfolio | Public sector | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 2 € 5
Credit impaired | Forborne loan portfolio | Public sector | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 0 € 0
Credit impaired | Forborne loan portfolio | Other financial institutions and: individual shareholder | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 716 579
Credit impaired | Forborne loan portfolio | Other financial institutions and: individual shareholder | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 320 259
Credit impaired | Forborne loan portfolio | Other financial institutions and: individual shareholder | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 47 € 22
Credit impaired | Forborne loan portfolio | Other financial institutions and: individual shareholder | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 6 € 11
Credit impaired | Forborne loan portfolio | Non financial institutions and individual shareholder | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 274,184 296,008
Credit impaired | Forborne loan portfolio | Non financial institutions and individual shareholder | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 141,565 26,767
Credit impaired | Forborne loan portfolio | Non financial institutions and individual shareholder | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 1,110 € 1,166
Credit impaired | Forborne loan portfolio | Non financial institutions and individual shareholder | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 350 € 420
Credit impaired | Forborne loan portfolio | Of which: Financing for constructions and property development | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 136 167
Credit impaired | Forborne loan portfolio | Of which: Financing for constructions and property development | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 195 264
Credit impaired | Forborne loan portfolio | Of which: Financing for constructions and property development | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 95 € 115
Credit impaired | Forborne loan portfolio | Of which: Financing for constructions and property development | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 1 € 4
Credit impaired | Forborne loan portfolio | Other warehouses | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 1,415,201 1,620,343
Credit impaired | Forborne loan portfolio | Other warehouses | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 339,251 296,470
Credit impaired | Forborne loan portfolio | Other warehouses | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 1,859 € 1,730
Credit impaired | Forborne loan portfolio | Other warehouses | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 2,624 € 2,232
Credit impaired | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Without collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 0 6,901
Credit impaired | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | With collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Number of transactions/operations | contract 0 1,720
Credit impaired | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Mortgage collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered € 0 € 110
Credit impaired | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Other collateral    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Maximum amount of the actual collateral that can be considered 0 5
Credit impaired | Gross carrying amount | Forborne loan portfolio | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 5,771 5,354
Credit impaired | Gross carrying amount | Forborne loan portfolio | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 8,444 7,980
Credit impaired | Gross carrying amount | Forborne loan portfolio | Credit entities | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 0
Credit impaired | Gross carrying amount | Forborne loan portfolio | Credit entities | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 0
Credit impaired | Gross carrying amount | Forborne loan portfolio | Public sector | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 2
Credit impaired | Gross carrying amount | Forborne loan portfolio | Public sector | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 3 7
Credit impaired | Gross carrying amount | Forborne loan portfolio | Other financial institutions and: individual shareholder | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 23 50
Credit impaired | Gross carrying amount | Forborne loan portfolio | Other financial institutions and: individual shareholder | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 77 75
Credit impaired | Gross carrying amount | Forborne loan portfolio | Non financial institutions and individual shareholder | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 3,123 2,901
Credit impaired | Gross carrying amount | Forborne loan portfolio | Non financial institutions and individual shareholder | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 2,306 2,585
Credit impaired | Gross carrying amount | Forborne loan portfolio | Of which: Financing for constructions and property development | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 2 3
Credit impaired | Gross carrying amount | Forborne loan portfolio | Of which: Financing for constructions and property development | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 174 156
Credit impaired | Gross carrying amount | Forborne loan portfolio | Other warehouses | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 2,625 2,401
Credit impaired | Gross carrying amount | Forborne loan portfolio | Other warehouses | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 6,058 5,313
Credit impaired | Gross carrying amount | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Without collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 120
Credit impaired | Gross carrying amount | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | With collateral | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 235
Credit impaired | Accumulated impairment | Forborne loan portfolio | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 5,862 5,508
Credit impaired | Accumulated impairment | Forborne loan portfolio | Credit entities | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 0 0
Credit impaired | Accumulated impairment | Forborne loan portfolio | Public sector | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 3 8
Credit impaired | Accumulated impairment | Forborne loan portfolio | Other financial institutions and: individual shareholder | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 48 89
Credit impaired | Accumulated impairment | Forborne loan portfolio | Non financial institutions and individual shareholder | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 2,467 2,420
Credit impaired | Accumulated impairment | Forborne loan portfolio | Of which: Financing for constructions and property development | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 50 50
Credit impaired | Accumulated impairment | Forborne loan portfolio | Other warehouses | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets 3,344 2,991
Credit impaired | Accumulated impairment | Financing classified as non-current assets and disposable groups of items that have been classified as held for sale | Loans And Receivables    
CURRENT REFINANCING AND RESTRUCTURING BALANCES    
Financial assets € 0 € 145