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FINANCIAL OBLIGATIONS - Interbank borrowings, overnight funds - Tabular disclosure (Details) - COP ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]    
Total borrowings from banks and others $ 22,218,460 $ 30,309,358
Colombia, Pesos    
Disclosure of detailed information about borrowings [line items]    
Overnight funds 24,539 10,049
Interbank funds purchased 671,542 271,843
Commitments to transfer open and closed repo operations 3,746,752 2,221,471
Commitments to transfer simultaneous operations 9,158,585 4,106,145
Commitments originated in short positions simultaneous operations 1,093,314 784,651
Total interbank funds 14,694,732 7,394,159
Borrowings 3,605,693 3,986,088
Lease contracts 1,793,568 1,566,279
Overdrafts in bank checking account 13 52
Other financial obligations 237,129 237,993
Total borrowings from banks and others 5,636,403 5,790,412
Foreign currency [member]    
Disclosure of detailed information about borrowings [line items]    
Overnight funds 14,241 7,199
Interbank funds purchased   450,762
Commitments to transfer open and closed repo operations 372,947 1,162,612
Commitments to transfer simultaneous operations   73,189
Total interbank funds 387,188 1,693,762
Borrowings 12,077,906 18,699,150
Lease contracts 998,180 769,665
Letters of credit 1,026,404 1,256,283
Bankers Acceptances 2,479,567 3,793,848
Total borrowings from banks and others 16,582,057 24,518,946
Total interbank borrowings, overnight funds and borrowings from banks and others $ 37,300,380 $ 39,397,279