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RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Other accounts receivable at amortized cost - Evaluated using simplified approach (Details) - COP ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of financial assets [line items]    
Financial assets $ 304,853,883 $ 280,746,878
Accumulated impairment [member]    
Disclosure of financial assets [line items]    
Financial assets (10,478,009) (10,521,501)
Trade Receivables And Contract Assets From Individual Customers | Financial instruments credit-impaired [member]    
Disclosure of financial assets [line items]    
Financial assets 1,071,136 924,037
Trade Receivables And Contract Assets From Individual Customers | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 6,400,933 6,152,455
Trade Receivables And Contract Assets From Individual Customers | Accumulated impairment [member]    
Disclosure of financial assets [line items]    
Financial assets $ (178,739) $ (189,485)
Trade Receivables And Contract Assets From Individual Customers | Not later than one month [member]    
Disclosure of financial assets [line items]    
Expected credit loss rate 0.54% 0.18%
Trade Receivables And Contract Assets From Individual Customers | Not later than one month [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets $ 5,021,674 $ 4,949,057
Trade Receivables And Contract Assets From Individual Customers | Not later than one month [member] | Accumulated impairment [member]    
Disclosure of financial assets [line items]    
Financial assets $ (26,971) $ (8,889)
Trade Receivables And Contract Assets From Individual Customers | Later than one month and not later than two months [member]    
Disclosure of financial assets [line items]    
Expected credit loss rate 1.11% 0.36%
Trade Receivables And Contract Assets From Individual Customers | Later than one month and not later than two months [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets $ 128,404 $ 173,165
Trade Receivables And Contract Assets From Individual Customers | Later than one month and not later than two months [member] | Accumulated impairment [member]    
Disclosure of financial assets [line items]    
Financial assets $ (1,428) $ (621)
Trade Receivables And Contract Assets From Individual Customers | Later than two months and not later than three months [member]    
Disclosure of financial assets [line items]    
Expected credit loss rate 0.94% 1.89%
Trade Receivables And Contract Assets From Individual Customers | Later than two months and not later than three months [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets $ 179,719 $ 106,196
Trade Receivables And Contract Assets From Individual Customers | Later than two months and not later than three months [member] | Accumulated impairment [member]    
Disclosure of financial assets [line items]    
Financial assets $ (1,682) $ (2,007)
Trade Receivables And Contract Assets From Individual Customers | Later than three months [member]    
Disclosure of financial assets [line items]    
Expected credit loss rate 13.88% 19.26%
Trade Receivables And Contract Assets From Individual Customers | Later than three months [member] | Financial instruments credit-impaired [member]    
Disclosure of financial assets [line items]    
Financial assets $ 1,071,136 $ 924,037
Trade Receivables And Contract Assets From Individual Customers | Later than three months [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 1,071,136 924,037
Trade Receivables And Contract Assets From Individual Customers | Later than three months [member] | Accumulated impairment [member]    
Disclosure of financial assets [line items]    
Financial assets $ (148,658) $ (177,968)