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TANGIBLE ASSETS - Investment properties - Summary (Details) - COP ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Investment properties, cost $ 627,435 $ 637,289
Investment properties, accumulated adjustments to fair value 345,500 269,180
Investment properties 972,935 906,469
Land [member]    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Investment properties, cost 278,186 301,519
Investment properties, accumulated adjustments to fair value 275,084 184,715
Investment properties 553,270 486,234
Buildings [member]    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Investment properties, cost 349,249 335,770
Investment properties, accumulated adjustments to fair value 70,416 84,465
Investment properties $ 419,665 $ 420,235