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ESTIMATION OF FAIR VALUE - Sensitivity analysis (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Weighted average cost of capital, measurement input [member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
+100 bps $ (864,845) $ (827,154)
-100 bps 1,316,441 1,279,273
Growth rate    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
+100 bps 785,847 746,633
-100 bps $ (552,066) $ (518,685)