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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, 2023
Dec. 31, 2022
Disclosure of financial assets [line items]    
Financial assets $ 280,746,878 $ 274,682,875
Financial assets at amortised cost, category [member]    
Disclosure of financial assets [line items]    
Financial assets 236,970,165 235,373,468
Other accounts receivable at amortized cost [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 22,171,973 20,255,758
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 22,171,973 20,255,758
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 15,713,547 14,315,166
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 119,607 145,724
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 186,364 181,992
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 14,571,534 13,231,073
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 14,569,999 13,231,073
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 1,535  
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 13,990,298 12,653,956
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 13,990,298 12,653,956
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 1,535  
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 1,535  
Other accounts receivable, general approach, other accounts receivables and contract assets for government and corporate customers, financial entities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 579,701 577,117
Other accounts receivable, general approach, other accounts receivables and contract assets for government and corporate customers, financial entities [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 $ 579,701 $ 577,117