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TANGIBLE ASSETS - Investment properties - Summary (Details) - COP ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items]    
Investment properties, cost $ 637,289 $ 629,553
Investment properties, accumulated adjustments to fair value 269,180 251,410
Investment properties 906,469 880,963
Land    
Disclosure of detailed information about property, plant and equipment [line items]    
Investment properties, cost 301,519 346,398
Investment properties, accumulated adjustments to fair value 184,715 175,866
Investment properties 486,234 522,264
Buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Investment properties, cost 335,770 283,155
Investment properties, accumulated adjustments to fair value 84,465 75,544
Investment properties $ 420,235 $ 358,699