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RISK MANAGEMENT - modified financial assets - Credit commitments (Details) - COP ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Loan commitments and financial guarantee contracts [member]    
Disclosure of financial assets [line items]    
Notional amount $ 31,399,492 $ 29,798,544
Loan commitments and financial guarantee contracts [member] | Colombia, Pesos    
Disclosure of financial assets [line items]    
Notional amount 27,533,438 25,821,105
Loan commitments and financial guarantee contracts [member] | United States of America, Dollars    
Disclosure of financial assets [line items]    
Notional amount 3,847,658 3,962,607
Loan commitments and financial guarantee contracts [member] | Euro Member Countries, Euro    
Disclosure of financial assets [line items]    
Notional amount 14,517 13,585
Loan commitments and financial guarantee contracts [member] | Other Currency    
Disclosure of financial assets [line items]    
Notional amount 3,879 1,247
Guarantees    
Disclosure of financial assets [line items]    
Notional amount 3,082,949 3,052,607
Unused credit card limits    
Disclosure of financial assets [line items]    
Notional amount 12,933,383 12,449,298
Approved credits not disbursed    
Disclosure of financial assets [line items]    
Notional amount 5,432,167 4,818,508
Credit arrangements    
Disclosure of financial assets [line items]    
Notional amount 4,583,513 4,223,426
Unused limits of overdrafts    
Disclosure of financial assets [line items]    
Notional amount 2,261,456 2,264,226
Unused letters of credit    
Disclosure of financial assets [line items]    
Notional amount 382,953 735,472
Other Commitments    
Disclosure of financial assets [line items]    
Notional amount $ 2,723,071 $ 2,255,007