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INVESTMENTS IN ASSOCIATES AND JOINT VENTURES - Roll forward of investment in associates (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of associates [line items]      
Balance at the beginning of the year $ 1,288,641    
Participation in the profit or loss of the period 2,191,477 $ 2,177,116 $ 4,002,967
Participation in Other Comprehensive Income 746,133 562,527 (3,162,875)
Dividends declared (1,188,422) (2,040,507) (669,795)
Year-end balance 1,429,186 1,288,641  
Associates      
Disclosure of associates [line items]      
Balance at the beginning of the year 1,288,641 1,419,296 1,170,435
Acquisitions 2,486 2,433 7,267
Participation in the profit or loss of the period 379,028 373,402 371,127
Participation in Other Comprehensive Income 15,329 (35,892) 81,730
Dividends declared (314,504) (363,466) (301,895)
Entity liquidation   (282)  
Exchange difference 58,206 (106,850) 90,632
Year-end balance $ 1,429,186 $ 1,288,641 $ 1,419,296