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RISK MANAGEMENT - Modified Financial Assets - Credit commitments (Details) - COP ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Loan commitments and financial guarantee contracts [member]    
Disclosure of financial assets [line items]    
Notional amount $ 29,798,544 $ 31,008,169
Loan commitments and financial guarantee contracts [member] | Colombia, Pesos    
Disclosure of financial assets [line items]    
Notional amount 25,821,105 25,497,816
Loan commitments and financial guarantee contracts [member] | United States of America, Dollars    
Disclosure of financial assets [line items]    
Notional amount 3,962,607 5,480,746
Loan commitments and financial guarantee contracts [member] | Euro Member Countries, Euro    
Disclosure of financial assets [line items]    
Notional amount 13,585 27,934
Loan commitments and financial guarantee contracts [member] | Other Currency [Member]    
Disclosure of financial assets [line items]    
Notional amount 1,247 1,673
Guarantees    
Disclosure of financial assets [line items]    
Notional amount 3,052,607 4,679,653
Unused credit card limits    
Disclosure of financial assets [line items]    
Notional amount 12,449,298 11,861,422
Approved credits not disbursed    
Disclosure of financial assets [line items]    
Notional amount 4,818,508 5,037,950
Credit arrangements    
Disclosure of financial assets [line items]    
Notional amount 4,223,426 4,119,577
Unused limits of overdrafts    
Disclosure of financial assets [line items]    
Notional amount 2,264,226 2,491,299
Unused letters of credit    
Disclosure of financial assets [line items]    
Notional amount 735,472 1,203,070
Other Commitments    
Disclosure of financial assets [line items]    
Notional amount $ 2,255,007 $ 1,615,198