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HEDGE ACCOUNTING - Financial instruments for hedging - assets (Details) - COP ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of financial assets [line items]    
Assets $ 48,662 $ 20,854
Forward contracts    
Disclosure of financial assets [line items]    
Assets 687 4,830
Forward contracts, Foreign currency to buy    
Disclosure of financial assets [line items]    
Assets 687 4,630
Forward contracts, Foreign currency to sell    
Disclosure of financial assets [line items]    
Assets   200
Swap    
Disclosure of financial assets [line items]    
Assets 47,975 16,024
Interest rate swap    
Disclosure of financial assets [line items]    
Assets $ 47,975 $ 16,024