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INVESTMENTS IN ASSOCIATES AND JOINT VENTURES - Roll forward of investment in joint ventures (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of joint ventures [line items]      
Balance at the beginning of the year $ 2,042    
Participation in the profit or loss of the period 2,191,477 $ 2,177,116 $ 4,002,967
Year-end balance 1,410 2,042  
Joint ventures      
Disclosure of joint ventures [line items]      
Balance at the beginning of the year 2,042 4,047 2,394
Participation in the profit or loss of the period (632) (2,005) 1,650
Acquisitions     3
Year-end balance $ 1,410 $ 2,042 $ 4,047