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RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Other accounts receivable at amortized cost - Evaluated using general approach - Other accounts receivable and contract assets for corporate customers (Details) - COP ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of financial assets [line items]    
Financial assets $ 304,853,883 $ 280,746,878
Financial assets at amortised cost, category [member]    
Disclosure of financial assets [line items]    
Financial assets 251,981,889 236,970,165
Other accounts receivable at amortized cost [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 24,138,538 22,171,973
Other accounts receivable at amortized cost [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 24,138,538 22,171,973
Other accounts receivable at amortized cost [member] | 12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 17,460,928 15,713,547
Other accounts receivable at amortized cost [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 130,745 119,607
Other accounts receivable at amortized cost [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 145,932 186,364
Other accounts receivable, general approach, other accounts receivables and contract assets for government and corporate customers | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 15,964,280 14,571,534
Other accounts receivable, general approach, other accounts receivables and contract assets for government and corporate customers | 12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 15,962,982 14,569,999
Other accounts receivable, general approach, other accounts receivables and contract assets for government and corporate customers | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 1,298 1,535
Other accounts receivable, general approach, other accounts receivables and contract assets for government and corporate customers, sovereign [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 15,962,982 14,569,999
Other accounts receivable, general approach, other accounts receivables and contract assets for government and corporate customers, sovereign [member] | 12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 15,962,982 14,569,999
Other accounts receivable, general approach, other accounts receivables and contract assets for government and corporate customers, corporate [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 1,298 1,535
Other accounts receivable, general approach, other accounts receivables and contract assets for government and corporate customers, corporate [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets $ 1,298 $ 1,535