v3.26.1
RISK MANAGEMENT - Loss allowance roll forward (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance $ (304,853,883)    
Ending balance (305,457,293) $ (304,853,883)  
Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 10,478,009    
Ending balance 8,935,367 10,478,009  
Loan commitments and financial guarantee contracts [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 72,414 70,268 $ 64,910
Net remeasurement of loss allowance (19,861) (17,398) (14,682)
New financial assets originated or purchased / Provision charged to profit or loss 25,995 20,230 20,271
FX and other movements (118) 220 (320)
Discontinued operations 167 (906) 89
Reclassification MFG operation (772)    
Ending balance 77,825 72,414 70,268
Other accounts receivable, general approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 170,930 186,282 185,301
Net remeasurement of loss allowance 52,233 66,500 51,513
FX and other movements (4,535) 4,301 (5,523)
Write-offs (59,750) (86,153) (45,009)
Ending balance 158,878 170,930 186,282
Other accounts receivable, simplified approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 191,041    
Ending balance 233,814 191,041  
Investment securities at fair value [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (28,472,926)    
Ending balance (30,055,436) (28,472,926)  
Financial assets at amortised cost, category [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (251,981,889)    
Ending balance (243,432,271) (251,981,889)  
Financial assets at amortised cost, category [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 10,387,285    
Ending balance 8,830,940 10,387,285  
Financial assets at amortised cost, category [member] | Loan portfolio [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (190,129,486)    
Ending balance (184,225,973) (190,129,486)  
Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated depreciation, amortisation and impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 10,006,639    
Ending balance 8,429,970 10,006,639  
Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 10,006,639 10,035,715 9,197,514
Net remeasurement of loss allowance 3,661,899 4,618,024 4,268,027
New financial assets originated or purchased / Provision charged to profit or loss 1,632,795 1,285,076 1,649,497
Financial assets that have been derecognized/paid (1,131,374) (1,308,392) (1,346,964)
Sales of portfolio (302,306) (134,655) (361,380)
Unwind of discount 388,182 816,088 724,748
FX and other movements (50,074) 43,033 (74,129)
Discontinued operations 159,231 138,514 154,901
Reclassification MFG operation (262,011)    
Write-offs (5,673,011) (5,486,764) (4,176,499)
Ending balance 8,429,970 10,006,639 10,035,715
Financial assets at amortised cost, category [member] | Loans to corporate entities [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (110,756,010)    
Ending balance (105,824,421) (110,756,010)  
Financial assets at amortised cost, category [member] | Loans to corporate entities [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 5,363,688    
Ending balance 4,262,079 5,363,688  
Financial assets at amortised cost, category [member] | Commercial lending portfolio [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (110,051,750)    
Ending balance (104,047,053) (110,051,750)  
Financial assets at amortised cost, category [member] | Commercial lending portfolio [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 5,362,893 5,294,600 5,492,746
Net remeasurement of loss allowance 797,017 903,735 349,419
New financial assets originated or purchased / Provision charged to profit or loss 751,525 432,334 467,926
Financial assets that have been derecognized/paid (595,375) (645,241) (679,439)
Sales of portfolio (186,846) (94,960) (194,305)
Unwind of discount 261,596 593,569 517,529
FX and other movements (34,874) 31,150 (56,490)
Discontinued operations 48,202 67,536 65,207
Reclassification MFG operation (160,588)    
Write-offs (1,981,619) (1,219,830) (667,993)
Ending balance 4,261,931 5,362,893 5,294,600
Financial assets at amortised cost, category [member] | Interbank and overnight funds [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (704,260)    
Ending balance (1,777,368) (704,260)  
Financial assets at amortised cost, category [member] | Interbank and overnight funds [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 795 22 1,444
Net remeasurement of loss allowance 1 732 (120)
New financial assets originated or purchased / Provision charged to profit or loss 2,803 99 1,787
Financial assets that have been derecognized/paid (3,451) (58) (3,089)
Ending balance 148 795 22
Financial assets at amortised cost, category [member] | Loans to consumers [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (57,810,307)    
Ending balance (56,791,437) (57,810,307)  
Financial assets at amortised cost, category [member] | Loans to consumers [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 4,166,018 4,307,446 3,311,912
Net remeasurement of loss allowance 2,690,471 3,554,301 3,870,225
New financial assets originated or purchased / Provision charged to profit or loss 849,049 834,485 1,116,839
Financial assets that have been derecognized/paid (504,529) (608,662) (644,139)
Sales of portfolio (115,460) (10,064) (167,075)
Unwind of discount 107,651 199,816 183,203
FX and other movements (11,875) 9,042 (13,363)
Discontinued operations 108,312 59,341 83,088
Reclassification MFG operation (83,070)    
Write-offs (3,541,791) (4,179,687) (3,433,244)
Ending balance 3,664,776 4,166,018 4,307,446
Financial assets at amortised cost, category [member] | Mortgages [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (21,562,412)    
Ending balance (21,609,555) (21,562,412)  
Financial assets at amortised cost, category [member] | Mortgages [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 473,315 379,987 352,441
Net remeasurement of loss allowance 174,458 135,959 18,970
New financial assets originated or purchased / Provision charged to profit or loss 29,418 15,443 58,147
Financial assets that have been derecognized/paid (27,978) (17,517) (17,867)
Unwind of discount 18,859 21,019 17,000
FX and other movements (3,325) 2,841 (4,276)
Discontinued operations 2,717 11,637 6,606
Reclassification MFG operation (18,353)    
Write-offs (146,956) (76,054) (51,034)
Ending balance 502,155 473,315 379,987
Financial assets at amortised cost, category [member] | Microcredit [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (757)    
Ending balance (560) (757)  
Financial assets at amortised cost, category [member] | Microcredit [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 3,618 53,660 38,971
Net remeasurement of loss allowance (48) 23,297 29,533
New financial assets originated or purchased / Provision charged to profit or loss   2,715 4,798
Financial assets that have been derecognized/paid (41) (36,914) (2,430)
Sales of portfolio   (29,631)  
Unwind of discount 76 1,684 7,016
Write-offs (2,645) (11,193) (24,228)
Ending balance 960 3,618 53,660
Financial assets at amortised cost, category [member] | Other accounts receivable at amortized cost [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 361,971    
Ending balance 392,692 361,971  
Financial assets at amortised cost, category [member] | Other accounts receivable, simplified approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 191,041    
Ending balance 233,814 191,041  
Financial assets measured at fair value through other comprehensive income, category [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (27,050,198)    
Ending balance (28,455,957) (27,050,198)  
Debt securities [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 18,675 16,882 36,930
Net remeasurement of loss allowance (6,960) (2,336) (15,311)
New financial assets originated or purchased / Provision charged to profit or loss 4,268 3,279 2,669
Financial assets that have been derecognized/paid (1,531) (1,366) (1,466)
FX and other movements (1,551) 2,216 (5,940)
Discontinued operations (3,722)    
Reclassification MFG operation (901)    
Ending balance 8,278 18,675 16,882
Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (27,050,198)    
Ending balance (28,455,957) (27,050,198)  
Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 18,310 12,972 12,686
Net remeasurement of loss allowance 5,799 452 (892)
New financial assets originated or purchased / Provision charged to profit or loss 13,400 9,029 6,470
Financial assets that have been derecognized/paid (8,050) (4,895) (4,342)
FX and other movements (130) 752 (950)
Discontinued operations (2,727)    
Ending balance 26,602 18,310 12,972
12-month expected credit losses [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 2,017,308    
Ending balance 2,002,599 2,017,308  
12-month expected credit losses [member] | Loan commitments and financial guarantee contracts [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 62,509 61,637 58,160
Transfer from stage 1 to stage 2 (1,094) (1,233) (1,690)
Transfer from stage 1 to stage 3 (226) (503) (218)
Transfer from stage 2 to stage 1 1,954 2,998 1,105
Transfer from stage 3 to stage 1 56 20 29
Net remeasurement of loss allowance (17,120) (17,928) (14,124)
New financial assets originated or purchased / Provision charged to profit or loss 23,891 18,204 18,604
FX and other movements (111) 220 (318)
Discontinued operations 209 (906) 89
Reclassification MFG operation (760)    
Ending balance 69,308 62,509 61,637
12-month expected credit losses [member] | Other accounts receivable, general approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 31,226 25,965 24,977
Net remeasurement of loss allowance 2,442 4,932 4,389
FX and other movements (1,305) 860 (1,789)
Write-offs (1,202) (531) (1,612)
Ending balance 31,161 31,226 25,965
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 1,936,489    
Ending balance 1,906,733 1,936,489  
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 1,890,934 1,811,608 1,494,887
Transfer from stage 1 to stage 2 (275,855) (332,518) (332,307)
Transfer from stage 1 to stage 3 (316,862) (422,672) (450,063)
Transfer from stage 2 to stage 1 282,164 339,075 479,360
Transfer from stage 3 to stage 1 126,870 112,495 113,974
Net remeasurement of loss allowance 13,558 408,965 328,184
New financial assets originated or purchased / Provision charged to profit or loss 886,998 553,975 746,460
Financial assets that have been derecognized/paid (547,374) (494,729) (407,483)
Sales of portfolio (10) (3,063) (2,369)
Unwind of discount   1 12
FX and other movements (11,629) 9,650 (13,879)
Discontinued operations (23,788) (23,538) (31,149)
Reclassification MFG operation (70,728)    
Write-offs (86,984) (68,315) (114,019)
Ending balance 1,867,294 1,890,934 1,811,608
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Commercial lending portfolio [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 724,075 612,441 598,538
Transfer from stage 1 to stage 2 (55,003) (55,649) (44,743)
Transfer from stage 1 to stage 3 (15,271) (18,703) (18,381)
Transfer from stage 2 to stage 1 54,778 69,270 150,216
Transfer from stage 3 to stage 1 18,925 25,801 31,836
Net remeasurement of loss allowance (89,531) 89,091 (143,952)
New financial assets originated or purchased / Provision charged to profit or loss 397,081 276,958 285,466
Financial assets that have been derecognized/paid (293,004) (266,644) (211,534)
Sales of portfolio (3)    
Unwind of discount   1  
FX and other movements (6,900) 5,749 (11,012)
Discontinued operations (7,562) (9,701) (20,690)
Reclassification MFG operation (34,399)    
Write-offs (9,296) (4,539) (3,303)
Ending balance 683,890 724,075 612,441
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Interbank and overnight funds [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 794 22 1,444
Transfer from stage 2 to stage 1     2
Net remeasurement of loss allowance 2 731 (122)
New financial assets originated or purchased / Provision charged to profit or loss 2,803 99 1,787
Financial assets that have been derecognized/paid (3,451) (58) (3,089)
Ending balance 148 794 22
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Loans to consumers [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 1,105,918 1,141,997 839,904
Transfer from stage 1 to stage 2 (209,643) (265,008) (276,858)
Transfer from stage 1 to stage 3 (300,847) (378,612) (429,739)
Transfer from stage 2 to stage 1 193,461 238,008 300,775
Transfer from stage 3 to stage 1 97,074 77,112 71,599
Net remeasurement of loss allowance 88,526 293,405 477,231
New financial assets originated or purchased / Provision charged to profit or loss 465,115 264,533 445,354
Financial assets that have been derecognized/paid (244,305) (216,409) (184,933)
Sales of portfolio (7) (21) (2,369)
FX and other movements (4,743) 3,660 (3,199)
Discontinued operations (8,535) (10,791) 6,177
Reclassification MFG operation (34,017)    
Write-offs (43,494) (41,956) (101,945)
Ending balance 1,104,503 1,105,918 1,141,997
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Mortgages [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 60,088 45,080 48,763
Transfer from stage 1 to stage 2 (11,209) (9,481) (7,295)
Transfer from stage 1 to stage 3 (741) (414) (635)
Transfer from stage 2 to stage 1 33,923 30,885 26,638
Transfer from stage 3 to stage 1 10,871 9,525 10,329
Net remeasurement of loss allowance 14,574 5,282 (11,295)
New financial assets originated or purchased / Provision charged to profit or loss 21,999 9,758 9,206
Financial assets that have been derecognized/paid (6,589) (5,924) (5,974)
Unwind of discount     12
FX and other movements 14 241 332
Discontinued operations (7,691) (3,046) (16,636)
Reclassification MFG operation (2,312)    
Write-offs (34,189) (21,818) (8,365)
Ending balance 78,738 60,088 45,080
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Microcredit [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 59 12,068 6,238
Transfer from stage 1 to stage 2   (2,380) (3,411)
Transfer from stage 1 to stage 3 (3) (24,943) (1,308)
Transfer from stage 2 to stage 1 2 912 1,729
Transfer from stage 3 to stage 1   57 210
Net remeasurement of loss allowance (13) 20,456 6,322
New financial assets originated or purchased / Provision charged to profit or loss   2,627 4,647
Financial assets that have been derecognized/paid (25) (5,694) (1,953)
Sales of portfolio   (3,042)  
Write-offs (5) (2) (406)
Ending balance 15 59 12,068
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Other accounts receivable, general approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 31,226    
Ending balance 31,161 31,226  
12-month expected credit losses [member] | Debt securities [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 14,329 12,613 28,563
Transfer from stage 2 to stage 1 4,346   1,485
Net remeasurement of loss allowance (6,960) (1,774) (14,315)
New financial assets originated or purchased / Provision charged to profit or loss 4,268 3,279 2,669
Financial assets that have been derecognized/paid (1,531) (1,366) (1,466)
FX and other movements (1,551) 1,577 (4,323)
Discontinued operations (3,722)    
Reclassification MFG operation (901)    
Ending balance 8,278 14,329 12,613
12-month expected credit losses [member] | Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance (27,050,198)    
Ending balance (28,455,957) (27,050,198)  
12-month expected credit losses [member] | Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 18,310 12,972 12,686
Net remeasurement of loss allowance 5,751 452 (892)
New financial assets originated or purchased / Provision charged to profit or loss 13,400 9,029 6,470
Financial assets that have been derecognized/paid (8,050) (4,895) (4,342)
FX and other movements (126) 752 (950)
Discontinued operations (2,727)    
Ending balance 26,558 18,310 12,972
Lifetime expected credit losses [member] | Other accounts receivable, simplified approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 191,041 199,382 197,115
Discontinued operations (456) 1,025 177
Entity deconsolidation     (3,245)
Provision charged to profit or loss 121,395 55,271 39,555
Reclassification MFG operation (4,225)    
Recovery for partial payments from the clients (12,224) (29,727) (14,581)
Write-offs (61,006) (35,436) (18,516)
Exchange gains (losses) in foreign currency (711) 526 (1,123)
Ending balance 233,814 191,041 199,382
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 1,250,965    
Ending balance 1,021,503 1,250,965  
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Loan commitments and financial guarantee contracts [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 7,671 7,682 6,461
Transfer from stage 1 to stage 2 1,094 1,233 1,690
Transfer from stage 2 to stage 3 (219) (167) (329)
Transfer from stage 3 to stage 2 5 1 4
Transfer from stage 2 to stage 1 (1,954) (2,998) (1,105)
Net remeasurement of loss allowance (1,671) (14) (769)
New financial assets originated or purchased / Provision charged to profit or loss 1,981 1,934 1,732
FX and other movements (1)   (2)
Discontinued operations 4    
Reclassification MFG operation (4)    
Ending balance 6,906 7,671 7,682
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Other accounts receivable, general approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 22,196 19,188 20,201
Net remeasurement of loss allowance 3,633 2,779 257
FX and other movements (606) 229 (1,270)
Ending balance 25,223 22,196 19,188
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 1,243,294    
Ending balance 1,014,553 1,243,294  
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 1,216,752 1,284,791 1,425,922
Transfer from stage 1 to stage 2 275,855 332,518 332,307
Transfer from stage 2 to stage 3 (1,026,370) (1,229,034) (1,180,705)
Transfer from stage 3 to stage 2 130,594 174,006 309,622
Transfer from stage 2 to stage 1 (282,164) (339,075) (479,360)
Net remeasurement of loss allowance 992,532 1,324,473 1,261,116
New financial assets originated or purchased / Provision charged to profit or loss 184,597 171,018 285,746
Financial assets that have been derecognized/paid (121,062) (122,114) (129,426)
Sales of portfolio (357) (793) (1,809)
Unwind of discount   77 62
FX and other movements (11,924) 7,608 (16,567)
Discontinued operations 60,721 25,642 18,163
Reclassification MFG operation (64,506)    
Write-offs (365,338) (412,365) (540,280)
Ending balance 989,330 1,216,752 1,284,791
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Financial assets at amortised cost, category [member] | Commercial lending portfolio [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 217,588 218,824 515,202
Transfer from stage 1 to stage 2 55,003 55,649 44,743
Transfer from stage 2 to stage 3 (143,316) (141,584) (130,514)
Transfer from stage 3 to stage 2 29,470 42,213 40,868
Transfer from stage 2 to stage 1 (54,778) (69,270) (150,216)
Net remeasurement of loss allowance 110,018 102,262 (109,495)
New financial assets originated or purchased / Provision charged to profit or loss 58,317 39,096 57,006
Financial assets that have been derecognized/paid (41,751) (37,026) (35,105)
Sales of portfolio (3)    
Unwind of discount   51 16
FX and other movements (5,869) 3,974 (9,657)
Discontinued operations 36,640 7,179 (1,893)
Reclassification MFG operation (35,413)    
Write-offs (5,078) (3,780) (2,131)
Ending balance 220,828 217,588 218,824
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Financial assets at amortised cost, category [member] | Interbank and overnight funds [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 1    
Transfer from stage 2 to stage 1     (2)
Net remeasurement of loss allowance (1) 1 2
Ending balance   1  
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Financial assets at amortised cost, category [member] | Loans to consumers [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 927,310 993,268 853,159
Transfer from stage 1 to stage 2 209,643 265,008 276,858
Transfer from stage 2 to stage 3 (843,865) (1,030,039) (1,004,192)
Transfer from stage 3 to stage 2 86,684 117,468 257,854
Transfer from stage 2 to stage 1 (193,461) (238,008) (300,775)
Net remeasurement of loss allowance 816,337 1,147,503 1,301,174
New financial assets originated or purchased / Provision charged to profit or loss 123,255 130,124 226,345
Financial assets that have been derecognized/paid (76,434) (78,281) (90,591)
Sales of portfolio (354) (602) (1,809)
Unwind of discount   26 46
FX and other movements (4,356) 2,364 (4,785)
Discontinued operations 24,002 14,058 13,305
Reclassification MFG operation (22,132)    
Write-offs (342,995) (395,579) (533,321)
Ending balance 703,634 927,310 993,268
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Financial assets at amortised cost, category [member] | Mortgages [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 71,839 66,333 52,639
Transfer from stage 1 to stage 2 11,209 9,481 7,295
Transfer from stage 2 to stage 3 (39,189) (48,596) (35,387)
Transfer from stage 3 to stage 2 14,440 13,789 9,526
Transfer from stage 2 to stage 1 (33,923) (30,885) (26,638)
Net remeasurement of loss allowance 66,186 68,567 59,040
New financial assets originated or purchased / Provision charged to profit or loss 3,025 1,729 2,298
Financial assets that have been derecognized/paid (2,873) (1,684) (3,465)
FX and other movements (1,699) 1,270 (2,125)
Discontinued operations 79 4,405 6,751
Reclassification MFG operation (6,961)    
Write-offs (17,265) (12,570) (3,601)
Ending balance 64,868 71,839 66,333
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Financial assets at amortised cost, category [member] | Microcredit [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 14 6,366 4,922
Transfer from stage 1 to stage 2   2,380 3,411
Transfer from stage 2 to stage 3   (8,815) (10,612)
Transfer from stage 3 to stage 2   536 1,374
Transfer from stage 2 to stage 1 (2) (912) (1,729)
Net remeasurement of loss allowance (8) 6,140 10,395
New financial assets originated or purchased / Provision charged to profit or loss   69 97
Financial assets that have been derecognized/paid (4) (5,123) (265)
Sales of portfolio   (191)  
Write-offs   (436) (1,227)
Ending balance   14 6,366
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Financial assets at amortised cost, category [member] | Other accounts receivable, general approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 22,196    
Ending balance 25,223 22,196  
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Debt securities [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 4,346 4,269 8,367
Transfer from stage 2 to stage 1 (4,346)   (1,485)
Net remeasurement of loss allowance   (562) (996)
FX and other movements   639 (1,617)
Ending balance   4,346 4,269
Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Net remeasurement of loss allowance 48    
FX and other movements (4)    
Ending balance 44    
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 7,018,695    
Ending balance 5,677,451 7,018,695  
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Loan commitments and financial guarantee contracts [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 2,234 949 289
Transfer from stage 1 to stage 3 226 503 218
Transfer from stage 2 to stage 3 219 167 329
Transfer from stage 3 to stage 2 (5) (1) (4)
Transfer from stage 3 to stage 1 (56) (20) (29)
Net remeasurement of loss allowance (1,070) 544 211
New financial assets originated or purchased / Provision charged to profit or loss 123 92 (65)
FX and other movements (6)    
Discontinued operations (46)    
Reclassification MFG operation (8)    
Ending balance 1,611 2,234 949
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Other accounts receivable, general approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 117,508 141,129 140,123
Net remeasurement of loss allowance 46,158 58,789 46,867
FX and other movements (2,624) 3,212 (2,464)
Write-offs (58,548) (85,622) (43,397)
Ending balance 102,494 117,508 141,129
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 7,016,461    
Ending balance 5,675,840 7,016,461  
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 6,898,953 6,939,316 6,276,705
Transfer from stage 1 to stage 3 316,862 422,672 450,063
Transfer from stage 2 to stage 3 1,026,370 1,229,034 1,180,705
Transfer from stage 3 to stage 2 (130,594) (174,006) (309,622)
Transfer from stage 3 to stage 1 (126,870) (112,495) (113,974)
Net remeasurement of loss allowance 2,655,809 2,884,586 2,678,727
New financial assets originated or purchased / Provision charged to profit or loss 561,200 560,083 617,291
Financial assets that have been derecognized/paid (462,938) (691,549) (810,055)
Sales of portfolio (301,939) (130,799) (357,202)
Unwind of discount 388,182 816,010 724,674
FX and other movements (26,521) 25,775 (43,683)
Discontinued operations 122,298 136,410 167,887
Reclassification MFG operation (126,777)    
Write-offs (5,220,689) (5,006,084) (3,522,200)
Ending balance 5,573,346 6,898,953 6,939,316
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Financial assets at amortised cost, category [member] | Commercial lending portfolio [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 4,421,230 4,463,335 4,379,006
Transfer from stage 1 to stage 3 15,271 18,703 18,381
Transfer from stage 2 to stage 3 143,316 141,584 130,514
Transfer from stage 3 to stage 2 (29,470) (42,213) (40,868)
Transfer from stage 3 to stage 1 (18,925) (25,801) (31,836)
Net remeasurement of loss allowance 776,530 712,382 602,866
New financial assets originated or purchased / Provision charged to profit or loss 296,127 116,280 125,454
Financial assets that have been derecognized/paid (260,620) (341,571) (432,800)
Sales of portfolio (186,840) (94,960) (194,305)
Unwind of discount 261,596 593,517 517,513
FX and other movements (22,105) 21,427 (35,821)
Discontinued operations 19,124 70,058 87,790
Reclassification MFG operation (90,776)    
Write-offs (1,967,245) (1,211,511) (662,559)
Ending balance 3,357,213 4,421,230 4,463,335
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Financial assets at amortised cost, category [member] | Loans to consumers [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 2,132,790 2,172,181 1,618,849
Transfer from stage 1 to stage 3 300,847 378,612 429,739
Transfer from stage 2 to stage 3 843,865 1,030,039 1,004,192
Transfer from stage 3 to stage 2 (86,684) (117,468) (257,854)
Transfer from stage 3 to stage 1 (97,074) (77,112) (71,599)
Net remeasurement of loss allowance 1,785,608 2,113,393 2,091,820
New financial assets originated or purchased / Provision charged to profit or loss 260,679 439,828 445,140
Financial assets that have been derecognized/paid (183,790) (313,972) (368,615)
Sales of portfolio (115,099) (9,441) (162,897)
Unwind of discount 107,651 199,790 183,157
FX and other movements (2,776) 3,018 (5,379)
Discontinued operations 92,845 56,074 63,606
Reclassification MFG operation (26,921)    
Write-offs (3,155,302) (3,742,152) (2,797,978)
Ending balance 1,856,639 2,132,790 2,172,181
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Financial assets at amortised cost, category [member] | Mortgages [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 341,388 268,574 251,039
Transfer from stage 1 to stage 3 741 414 635
Transfer from stage 2 to stage 3 39,189 48,596 35,387
Transfer from stage 3 to stage 2 (14,440) (13,789) (9,526)
Transfer from stage 3 to stage 1 (10,871) (9,525) (10,329)
Net remeasurement of loss allowance 93,698 62,110 (28,775)
New financial assets originated or purchased / Provision charged to profit or loss 4,394 3,956 46,643
Financial assets that have been derecognized/paid (18,516) (9,909) (8,428)
Unwind of discount 18,859 21,019 16,988
FX and other movements (1,640) 1,330 (2,483)
Discontinued operations 10,329 10,278 16,491
Reclassification MFG operation (9,080)    
Write-offs (95,502) (41,666) (39,068)
Ending balance 358,549 341,388 268,574
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Financial assets at amortised cost, category [member] | Microcredit [member] | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 3,545 35,226 27,811
Transfer from stage 1 to stage 3 3 24,943 1,308
Transfer from stage 2 to stage 3   8,815 10,612
Transfer from stage 3 to stage 2   (536) (1,374)
Transfer from stage 3 to stage 1   (57) (210)
Net remeasurement of loss allowance (27) (3,299) 12,816
New financial assets originated or purchased / Provision charged to profit or loss   19 54
Financial assets that have been derecognized/paid (12) (26,097) (212)
Sales of portfolio   (26,398)  
Unwind of discount 76 1,684 7,016
Write-offs (2,640) (10,755) (22,595)
Ending balance 945 3,545 $ 35,226
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Financial assets at amortised cost, category [member] | Other accounts receivable, general approach | Accumulated impairment [member]      
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]      
Beginning balance 117,508    
Ending balance $ 102,494 $ 117,508