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Note 7 Residual maturities by contractual periods (Details) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
On demand [Member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk € 11,125 € 10,353 € 9,227
On demand [Member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
On demand [Member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 3
On demand [Member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
On demand [Member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 99
On demand [Member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 1
On demand [Member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 0 0 0
On demand [Member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 2,600 2,092 2,176
On demand [Member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 6,950 8,507 7,392
On demand [Member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 318,252 304,096 302,667
On demand [Member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 0 0 0
On demand [Member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 0 0 0
Not later than one month [member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 38,087 61,678 66,497
Not later than one month [member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 5,246 4,676 3,870
Not later than one month [member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 2,677 1,288 2,199
Not later than one month [member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 34,310 42,407 31,049
Not later than one month [member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 34,605 28,644 24,622
Not later than one month [member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 2,861 2,167 4,031
Not later than one month [member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 2,484 1,187 1,841
Not later than one month [member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 6,070 3,669 7,885
Not later than one month [member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 9,247 5,526 5,760
Not later than one month [member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 50,789 44,745 38,951
Not later than one month [member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 74,614 86,908 51,638
Not later than one month [member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk (388) (21) (253)
Later than one month and not later than three months [member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
Later than one month and not later than three months [member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 541 393 319
Later than one month and not later than three months [member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 1,642 1,261 1,012
Later than one month and not later than three months [member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 10,594 21,683 5,743
Later than one month and not later than three months [member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 38,547 30,850 32,009
Later than one month and not later than three months [member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 2,741 6,011 4,107
Later than one month and not later than three months [member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 4,816 3,889 4,434
Later than one month and not later than three months [member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 476 1,076 628
Later than one month and not later than three months [member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 2,466 2,806 1,465
Later than one month and not later than three months [member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 23,758 16,225 18,542
Later than one month and not later than three months [member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 14,093 30,028 14,543
Later than one month and not later than three months [member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk (73) (30) 24
Later than three months and not later than six months [member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
Later than three months and not later than six months [member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 1,165 543 433
Later than three months and not later than six months [member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 970 1,049 746
Later than three months and not later than six months [member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 5,025 6,890 3,368
Later than three months and not later than six months [member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 29,770 28,239 25,622
Later than three months and not later than six months [member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 6,084 2,633 8,200
Later than three months and not later than six months [member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 5,536 8,518 1,050
Later than three months and not later than six months [member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 644 715 806
Later than three months and not later than six months [member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 1,584 1,036 464
Later than three months and not later than six months [member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 11,580 11,855 6,776
Later than three months and not later than six months [member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 5,452 6,107 17,736
Later than three months and not later than six months [member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk (142) 6 (1,010)
Later than six months and not later than nine months [Member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
Later than six months and not later than nine months [Member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 647 594 434
Later than six months and not later than nine months [Member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 929 385 516
Later than six months and not later than nine months [Member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 1,911 3,398 1,432
Later than six months and not later than nine months [Member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 16,928 16,434 14,827
Later than six months and not later than nine months [Member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 2,531 2,578 4,305
Later than six months and not later than nine months [Member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 3,347 4,935 3,148
Later than six months and not later than nine months [Member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 130 119 56
Later than six months and not later than nine months [Member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 922 834 379
Later than six months and not later than nine months [Member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 3,888 3,905 2,575
Later than six months and not later than nine months [Member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 2,355 2,274 866
Later than six months and not later than nine months [Member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 70 (62) (23)
Later than nine months and not later than one year [Member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
Later than nine months and not later than one year [Member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 918 602 468
Later than nine months and not later than one year [Member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 1,130 649 344
Later than nine months and not later than one year [Member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 3,138 2,596 1,127
Later than nine months and not later than one year [Member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 19,715 19,029 16,766
Later than nine months and not later than one year [Member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 5,922 11,950 4,746
Later than nine months and not later than one year [Member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 3,685 4,225 2,017
Later than nine months and not later than one year [Member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 732 605 694
Later than nine months and not later than one year [Member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 503 841 758
Later than nine months and not later than one year [Member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 4,329 5,500 2,870
Later than nine months and not later than one year [Member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 4,157 1,821 1,503
Later than nine months and not later than one year [Member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 142 (267) 175
Later than one year and not later than two years [member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
Later than one year and not later than two years [member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 861 602 242
Later than one year and not later than two years [member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 1,577 2,019 971
Later than one year and not later than two years [member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 5,782 3,319 4,582
Later than one year and not later than two years [member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 44,537 41,267 41,049
Later than one year and not later than two years [member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 20,625 15,266 18,417
Later than one year and not later than two years [member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 8,517 10,296 6,318
Later than one year and not later than two years [member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 558 795 648
Later than one year and not later than two years [member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 1,256 1,033 700
Later than one year and not later than two years [member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 2,055 1,753 1,476
Later than one year and not later than two years [member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 2,223 2,630 8,136
Later than one year and not later than two years [member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 549 69 40
Later than two years and not later than three years [member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
Later than two years and not later than three years [member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 351 136 183
Later than two years and not later than three years [member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 1,526 965 816
Later than two years and not later than three years [member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 3,675 3,817 1,354
Later than two years and not later than three years [member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 34,618 32,769 32,510
Later than two years and not later than three years [member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 20,053 14,016 8,744
Later than two years and not later than three years [member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 11,386 7,990 9,423
Later than two years and not later than three years [member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 242 46 211
Later than two years and not later than three years [member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 477 618 293
Later than two years and not later than three years [member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 569 1,029 1,276
Later than two years and not later than three years [member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 366 1,111 1,524
Later than two years and not later than three years [member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk (122) 45 (153)
Later than three years and not later than five years [member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
Later than three years and not later than five years [member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 33 24 6
Later than three years and not later than five years [member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 1,369 974 551
Later than three years and not later than five years [member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 3,008 2,133 2,400
Later than three years and not later than five years [member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 51,469 45,116 43,828
Later than three years and not later than five years [member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 21,972 29,245 23,307
Later than three years and not later than five years [member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 7,530 11,175 13,282
Later than three years and not later than five years [member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 570 198 396
Later than three years and not later than five years [member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 433 695 594
Later than three years and not later than five years [member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 834 758 798
Later than three years and not later than five years [member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 1,454 2,060 3,493
Later than three years and not later than five years [member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 5 (135) (466)
Later than five years [member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 0 0 0
Later than five years [member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 41 102 83
Later than five years [member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 681 1,291 830
Later than five years [member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 122 139 289
Later than five years [member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 105,649 104,086 96,201
Later than five years [member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 44,850 34,558 31,480
Later than five years [member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 28,306 22,424 18,145
Later than five years [member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 743 695 399
Later than five years [member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 742 638 727
Later than five years [member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 787 1,092 273
Later than five years [member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 445 677 575
Later than five years [member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk (87) (2,616) (3,717)
Total [Member] | Cash cash balances at central banks and other demand deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 49,212 72,031 75,724
Total [Member] | Deposits in credit entities [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 9,805 7,672 6,040
Total [Member] | Deposits in other financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 12,502 9,882 7,988
Total [Member] | Reverse repo securities borrowing and margin lending [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 67,565 86,382 51,343
Total [Member] | loans and advances [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 375,837 346,433 327,534
Total [Member] | Securities portfolio settlement [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial assets liquidity risk 127,640 118,424 107,338
Total [Member] | Wholesale funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 75,608 74,639 59,658
Total [Member] | Deposits in financial institutions [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 12,765 10,011 13,899
Total [Member] | Deposits in other financial institutions and international agencies [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 24,581 22,535 18,532
Total [Member] | Customer deposits [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 416,841 390,959 376,203
Total [Member] | Security pledge funding [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk 105,159 133,615 100,013
Total [Member] | Derivatives net [Member]      
Disclosure of maturity analysis for financial instruments held for managing liquidity risk [Line Items]      
Financial liabilities liquidity risk € (46) € (3,009) € (5,383)