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RISK MANAGEMENT - Probability of default analysis (Details) - COP ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets $ 269,560,244 $ 263,369,003
Exposure to credit risk outside of the statement of financial position 29,798,544 31,008,169
Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 29,798,544 31,008,169
Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 186,203,770 188,313,361
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 107,047,817 104,775,099
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 392,607 5,967,743
Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 59,999,611 59,419,444
Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 18,486,206 17,883,355
Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 277,529 267,720
0% - 7.5% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 26,635,121 27,036,822
0% - 7.5% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 157,477,318 159,544,526
0% - 7.5% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 90,369,120 87,377,945
0% - 7.5% | Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 392,607 5,967,742
0% - 7.5% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 49,844,542 50,343,679
0% - 7.5% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 16,703,178 15,701,061
0% - 7.5% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 167,871 154,099
7.5% - 15% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 1,118,635 1,340,672
7.5% - 15% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 9,493,176 8,680,422
7.5% - 15% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 5,292,513 4,603,020
7.5% - 15% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 3,792,346 3,027,668
7.5% - 15% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 381,893 1,009,155
7.5% - 15% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 26,424 40,579
15% - 22.5% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 1,715,107 1,875,939
15% - 22.5% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,090,031 1,328,384
15% - 22.5% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 290,761 228,796
15% - 22.5% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 628,643 932,283
15% - 22.5% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 156,150 159,987
15% - 22.5% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 14,477 7,318
22.5% - 30% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 13,611 235,000
22.5% - 30% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,029,751 886,922
22.5% - 30% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 371,940 306,484
22.5% - 30% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 591,038 373,449
22.5% - 30% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 58,586 194,546
22.5% - 30% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 8,187 12,443
30% - 45% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 147,062 306,069
30% - 45% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 2,238,438 3,748,293
30% - 45% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,419,479 2,761,276
30% - 45% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 594,958 927,034
30% - 45% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 220,303 56,227
30% - 45% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 3,698 3,756
45% - 60% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 3,075 80,594
45% - 60% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 604,939 902,763
45% - 60% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 29,644 275,210
45% - 60% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 409,229 506,786
45% - 60% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 160,225 115,992
45% - 60% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 5,841 4,775
60% - 90% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 1,485 48,891
60% - 90% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,674,345 1,551,415
60% - 90% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 81,812 72,972
60% - 90% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,377,873 1,316,118
60% - 90% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 200,657 148,793
60% - 90% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 14,003 13,532
> 90% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 164,448 84,182
> 90% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 12,595,772 11,670,636
> 90% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 9,192,548 9,149,396
> 90% | Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets   1
> 90% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 2,760,982 1,992,427
> 90% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 605,214 497,594
> 90% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 37,028 31,218
12-month expected credit losses [member] | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 26,817,149 27,088,361
12-month expected credit losses [member] | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 164,524,561 164,906,023
12-month expected credit losses [member] | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 94,328,300 89,958,234
12-month expected credit losses [member] | Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 392,607 5,967,742
12-month expected credit losses [member] | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 52,856,109 52,529,128
12-month expected credit losses [member] | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 16,720,997 16,226,428
12-month expected credit losses [member] | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 226,548 224,491
12-month expected credit losses [member] | 0% - 7.5% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 26,560,070 26,786,851
12-month expected credit losses [member] | 0% - 7.5% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 155,352,194 157,604,135
12-month expected credit losses [member] | 0% - 7.5% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 89,446,752 86,598,568
12-month expected credit losses [member] | 0% - 7.5% | Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 392,607 5,967,742
12-month expected credit losses [member] | 0% - 7.5% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 48,882,951 49,264,495
12-month expected credit losses [member] | 0% - 7.5% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 16,462,013 15,619,231
12-month expected credit losses [member] | 0% - 7.5% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 167,871 154,099
12-month expected credit losses [member] | 7.5% - 15% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 217,078 286,943
12-month expected credit losses [member] | 7.5% - 15% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 8,001,193 6,335,608
12-month expected credit losses [member] | 7.5% - 15% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 4,619,984 3,221,994
12-month expected credit losses [member] | 7.5% - 15% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 3,162,195 2,552,075
12-month expected credit losses [member] | 7.5% - 15% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 192,612 520,960
12-month expected credit losses [member] | 7.5% - 15% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 26,402 40,579
12-month expected credit losses [member] | 15% - 22.5% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 30,108 10,450
12-month expected credit losses [member] | 15% - 22.5% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 635,366 714,742
12-month expected credit losses [member] | 15% - 22.5% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 149,734 72,734
12-month expected credit losses [member] | 15% - 22.5% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 407,118 551,430
12-month expected credit losses [member] | 15% - 22.5% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 64,124 83,260
12-month expected credit losses [member] | 15% - 22.5% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 14,390 7,318
12-month expected credit losses [member] | 22.5% - 30% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 8,822 2,033
12-month expected credit losses [member] | 22.5% - 30% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 372,476 82,591
12-month expected credit losses [member] | 22.5% - 30% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 75,014 6,479
12-month expected credit losses [member] | 22.5% - 30% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 287,632 61,468
12-month expected credit losses [member] | 22.5% - 30% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,654 2,201
12-month expected credit losses [member] | 22.5% - 30% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 8,176 12,443
12-month expected credit losses [member] | 30% - 45% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 1,059 1,469
12-month expected credit losses [member] | 30% - 45% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 122,410 105,034
12-month expected credit losses [member] | 30% - 45% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 35,159 44,889
12-month expected credit losses [member] | 30% - 45% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 83,212 55,980
12-month expected credit losses [member] | 30% - 45% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 594 776
12-month expected credit losses [member] | 30% - 45% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 3,445 3,389
12-month expected credit losses [member] | 45% - 60% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 2 83
12-month expected credit losses [member] | 45% - 60% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 10,436 59,209
12-month expected credit losses [member] | 45% - 60% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets   12,023
12-month expected credit losses [member] | 45% - 60% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 5,394 42,850
12-month expected credit losses [member] | 45% - 60% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 5,042 4,336
12-month expected credit losses [member] | 60% - 90% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 9 532
12-month expected credit losses [member] | 60% - 90% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 30,479 2,306
12-month expected credit losses [member] | 60% - 90% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,652 1,446
12-month expected credit losses [member] | 60% - 90% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 27,605 578
12-month expected credit losses [member] | 60% - 90% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,222 282
12-month expected credit losses [member] | > 90% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 1  
12-month expected credit losses [member] | > 90% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 7 2,398
12-month expected credit losses [member] | > 90% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 5 101
12-month expected credit losses [member] | > 90% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 2 252
12-month expected credit losses [member] | > 90% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets   2,045
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 2,816,123 3,833,077
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 9,114,047 11,774,908
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 3,530,534 5,672,094
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 4,408,775 4,928,963
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,160,785 1,159,795
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 13,953 14,056
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 74,846 249,902
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 2,123,462 1,939,187
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 922,338 779,368
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 959,967 1,077,991
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 241,157 81,828
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 901,543 1,053,719
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,491,965 2,344,810
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 672,515 1,381,026
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 630,148 475,589
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 189,280 488,195
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 22  
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 15% - 22.5% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 1,684,982 1,865,391
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 15% - 22.5% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 454,652 613,626
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 15% - 22.5% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 141,027 156,062
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 15% - 22.5% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 221,512 380,837
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 15% - 22.5% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 92,026 76,727
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 15% - 22.5% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 87  
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 4,715 232,787
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 657,258 804,305
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 296,926 299,999
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 303,389 311,962
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 56,932 192,344
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 11  
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 145,865 303,823
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 2,115,980 3,643,179
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,384,320 2,716,387
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 511,700 870,976
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 219,707 55,449
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 253 367
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 2,821 79,811
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 594,121 843,511
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 29,600 263,181
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 403,500 463,902
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 160,222 115,989
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 799 439
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 1,050 47,631
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,640,781 1,545,507
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 79,911 70,843
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,347,432 1,312,625
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 200,657 148,789
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 12,781 13,250
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 301 13
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 35,828 40,783
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 3,897 5,228
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 31,127 35,081
Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 804 474
Financial instruments credit-impaired [member] | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 604,424 497,132
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 165,272 86,731
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 12,565,162 11,632,430
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 9,188,983 9,144,771
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets   1
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 2,734,727 1,961,353
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 604,424 497,132
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 37,028 29,173
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 205 69
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,662 1,204
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 30 9
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1,624 1,193
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 0% - 7.5% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 8 2
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 14 10
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 18 4
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 14  
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 3 4
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 7.5% - 15% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 1  
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 15% - 22.5% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 17 98
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 15% - 22.5% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 13 16
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 15% - 22.5% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 13 16
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 74 180
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 17 26
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets   6
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 17 19
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 22.5% - 30% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets   1
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 138 777
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 48 80
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 46 78
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 30% - 45% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 2 2
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 252 700
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 382 43
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 44 6
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 335 34
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 45% - 60% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 3 3
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 426 728
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 3,085 3,602
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 249 683
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 2,836 2,915
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | 60% - 90% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets   4
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Loan commitments and financial guarantee contracts [member]    
Disclosure of credit risk exposure [line items]    
Exposure to credit risk outside of the statement of financial position 164,146 84,169
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 12,559,937 11,627,455
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 9,188,646 9,144,067
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets   1
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 2,729,853 1,957,094
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Mortgage [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets 604,410 497,120
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | > 90% | Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk, financial assets $ 37,028 $ 29,173