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COMMITMENTS AND CONTINGENCIES - Contingencies (Details) - COP ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities $ 798,290 $ 755,656
Legal provisions proceedings    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities 124,012 123,603
Civil proceedings    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities 344,152 273,795
Administrative and other proceedings    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities $ 330,126 $ 358,258