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RISK MANAGEMENT - Risk management - Value at risk - Tabular disclosure (Details) - COP ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Interest rate risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk $ 440,804 $ 440,531
Interest rate risk [member] | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 217,031 173,355
Interest rate risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 299,985 121,194
Interest rate risk [member] | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 46,209 84,749
Interest rate risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 221,409 160,195
Interest rate risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 18,822 29,363
Currency risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 160,165 171,517
Currency risk [member] | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 717 15,681
Currency risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 7,221 5,796
Currency risk [member] | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 10 98
Currency risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 4,381 23,090
Currency risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 597 976
Equity price risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 37,830 3,870
Equity price risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 6,586 147
Equity price risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 7,221 6,557
Equity price risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 1,973 2,541
Mutual funds | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 429 143,705
Mutual funds | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 607 83,479
Mutual funds | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 22,926 20,548
Mutual funds | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 785 11,864
Mutual funds | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 7,057 692
Mutual funds | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 3,094 788
Bottom of range [member] | Interest rate risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 423,347 426,736
Bottom of range [member] | Interest rate risk [member] | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 179,858 173,355
Bottom of range [member] | Interest rate risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 82,783 121,194
Bottom of range [member] | Interest rate risk [member] | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 46,209 82,312
Bottom of range [member] | Interest rate risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 190,139 148,170
Bottom of range [member] | Interest rate risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 12,190 25,698
Bottom of range [member] | Currency risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 105,390 87,497
Bottom of range [member] | Currency risk [member] | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 717 99
Bottom of range [member] | Currency risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 5,050 4,290
Bottom of range [member] | Currency risk [member] | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 1 9
Bottom of range [member] | Currency risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 4,381 3,828
Bottom of range [member] | Currency risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 115 93
Bottom of range [member] | Equity price risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 3,891 3,759
Bottom of range [member] | Equity price risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 148 140
Bottom of range [member] | Equity price risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 7,086 6,017
Bottom of range [member] | Equity price risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 1,710 1,404
Bottom of range [member] | Mutual funds | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 106 108,165
Bottom of range [member] | Mutual funds | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 569 75,869
Bottom of range [member] | Mutual funds | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 7,255 12,209
Bottom of range [member] | Mutual funds | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 221 158
Bottom of range [member] | Mutual funds | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 7,057 692
Bottom of range [member] | Mutual funds | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 457 788
Weighted average [member] | Interest rate risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 428,765 441,281
Weighted average [member] | Interest rate risk [member] | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 205,998 196,810
Weighted average [member] | Interest rate risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 114,642 130,739
Weighted average [member] | Interest rate risk [member] | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 65,592 99,727
Weighted average [member] | Interest rate risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 209,769 172,466
Weighted average [member] | Interest rate risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 24,500 40,927
Weighted average [member] | Currency risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 138,671 133,241
Weighted average [member] | Currency risk [member] | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 3,662 3,354
Weighted average [member] | Currency risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 6,783 5,618
Weighted average [member] | Currency risk [member] | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 46 48
Weighted average [member] | Currency risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 16,757 15,882
Weighted average [member] | Currency risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 978 577
Weighted average [member] | Equity price risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 12,573 4,182
Weighted average [member] | Equity price risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 687 143
Weighted average [member] | Equity price risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 7,501 9,308
Weighted average [member] | Equity price risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 2,347 2,579
Weighted average [member] | Mutual funds | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 3,860 118,107
Weighted average [member] | Mutual funds | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 15,259 80,639
Weighted average [member] | Mutual funds | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 16,714 15,952
Weighted average [member] | Mutual funds | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 6,930 2,090
Weighted average [member] | Mutual funds | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 8,187 1,087
Weighted average [member] | Mutual funds | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 2,650 5,504
Top of range [member] | Interest rate risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 440,804 460,435
Top of range [member] | Interest rate risk [member] | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 251,416 243,326
Top of range [member] | Interest rate risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 299,985 144,932
Top of range [member] | Interest rate risk [member] | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 86,967 120,545
Top of range [member] | Interest rate risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 227,913 185,935
Top of range [member] | Interest rate risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 38,914 61,686
Top of range [member] | Currency risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 175,945 179,646
Top of range [member] | Currency risk [member] | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 11,894 15,681
Top of range [member] | Currency risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 7,759 6,711
Top of range [member] | Currency risk [member] | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 153 106
Top of range [member] | Currency risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 24,799 40,422
Top of range [member] | Currency risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 2,900 1,682
Top of range [member] | Equity price risk [member] | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 37,830 4,650
Top of range [member] | Equity price risk [member] | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 6,586 148
Top of range [member] | Equity price risk [member] | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 8,007 13,350
Top of range [member] | Equity price risk [member] | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk 3,091 3,379
Top of range [member] | Mutual funds | Banco de Bogota S.A.    
Disclosure of financial assets [line items]    
Value at risk 13,085 143,705
Top of range [member] | Mutual funds | Banco de Occidente S.A.    
Disclosure of financial assets [line items]    
Value at risk 85,455 83,479
Top of range [member] | Mutual funds | Banco Popular S.A.    
Disclosure of financial assets [line items]    
Value at risk 22,926 20,548
Top of range [member] | Mutual funds | Banco Comercial AV Villas S.A.    
Disclosure of financial assets [line items]    
Value at risk 14,175 11,864
Top of range [member] | Mutual funds | Corporacion Financiera Colombiana S.A.    
Disclosure of financial assets [line items]    
Value at risk 9,856 1,609
Top of range [member] | Mutual funds | Sociedad Administradora de Fondos de Pensiones y Cesantias Porvenir S.A.    
Disclosure of financial assets [line items]    
Value at risk $ 5,829 $ 15,922