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RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Other accounts receivable at FVTPL (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 fair value through profit or loss, category [member]    
Disclosure of financial assets [line items]    
Financial assets 24,400,493 19,332,588
Other accounts receivable at fair value through profit or loss, mandatorily measured at fair value [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 4,181,835 3,830,916
Other accounts receivable at fair value through profit or loss, mandatorily measured at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 4,181,835 3,830,916
Other accounts receivable at fair value through profit or loss, mandatorily measured at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Gross carrying amount [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 4,181,835 3,830,916
Service concession arrangement [member]    
Disclosure of financial assets [line items]    
Financial assets 19,260,241 17,812,820
Service concession arrangement [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 19,269,344 17,821,214
Service concession arrangement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 4,181,835 3,830,916
Service concession arrangement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Gross carrying amount [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets $ 4,181,835 $ 3,830,916