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OTHER INTANGIBLE ASSETS (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about intangible assets [line items]      
Beginning Balance $ 2,382,427 $ 2,040,158 $ 1,886,042
Capitalizations / Acquisitions / Purchases 654,850 682,696 599,678
Amortization (289,291) (277,022) (257,917)
Withdrawals (9,772) (13,206) (5,000)
Arrangement of entities   (14,792)  
Discontinued operations     (23,239)
Reclassification BAC     (190,970)
Effect of movements in exchange rates 20,104 (35,407) 31,564
Ending Balance 2,758,318 2,382,427 2,040,158
Internally Generated - Developing      
Disclosure of detailed information about intangible assets [line items]      
Beginning Balance 1,201,443 789,686 563,261
Capitalizations / Acquisitions / Purchases 609,682 629,807 494,055
Transfers (665,019) (191,381) (252,193)
Withdrawals (1,494) (11,244) (3,619)
Arrangement of entities   (14,333)  
Reclassification BAC     (13,538)
Effect of movements in exchange rates 1,002 (1,092) 1,720
Ending Balance 1,145,614 1,201,443 789,686
Internally Generated - In Use      
Disclosure of detailed information about intangible assets [line items]      
Beginning Balance 485,376 463,960 378,956
Amortization (112,936) (89,949) (70,538)
Transfers 431,499 111,365 155,588
Withdrawals (3,232)   (46)
Ending Balance 800,707 485,376 463,960
Separate acquisition      
Disclosure of detailed information about intangible assets [line items]      
Beginning Balance 695,608 786,512 943,825
Capitalizations / Acquisitions / Purchases 45,168 52,889 105,623
Amortization (176,355) (187,073) (187,379)
Transfers 233,520 80,016 96,605
Withdrawals (5,046) (1,962) (1,335)
Arrangement of entities   (459)  
Discontinued operations     (23,239)
Reclassification BAC     (177,432)
Effect of movements in exchange rates 19,102 (34,315) 29,844
Ending Balance $ 811,997 $ 695,608 $ 786,512