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REPORTING ENTITY - Spin off BAC Holding - Impacts on assets, liabilities and equity recognized (Details) - COP ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Disclosure of analysis of single amount of discontinued operations [line items]      
Total assets   $ 301,181,596 $ 295,591,236
Total liabilities   269,661,180 264,769,577
Non-controlling interests   14,737,744 14,354,689
Equity attributable to owners of the parent   $ 16,782,672 $ 16,466,970
BAC Holding International Corp | Ifrs Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member]      
Disclosure of analysis of single amount of discontinued operations [line items]      
Total assets $ 111,185,832    
Total liabilities 98,305,772    
Non-controlling interests 1,961    
Equity attributable to owners of the parent $ 12,878,099    
Percentage of spin off 75.00%    
Spin-off amount $ 9,658,574    
Proportion of ownership interest in subsidiary 68.74%    
Effect of the spin-off on owners of the parent $ (6,638,961)    
Effect of the spin-off on non-controlling interest $ (3,019,613)