v3.26.1
ANALYSIS OF OPERATING SEGMENTS - Revenue from contracts with customers (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of operating segments [line items]      
Revenue from contracts with customers $ 15,181,019 $ 15,526,204 $ 15,439,320
Goods or services transferred at point in time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 1,309,313 751,021 603,383
Goods or services transferred over time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 13,871,706 14,775,183 14,835,937
Operating segments [member] | Banking Services      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 3,668,983 3,461,063 3,364,452
Operating segments [member] | Banking Services | Goods or services transferred at point in time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 239,936 178,640 152,012
Operating segments [member] | Banking Services | Goods or services transferred over time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 3,429,047 3,282,423 3,212,440
Operating segments [member] | Merchant Banking      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 10,208,702 10,899,961 11,101,466
Operating segments [member] | Merchant Banking | Goods or services transferred at point in time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 992,511 507,425 398,543
Operating segments [member] | Merchant Banking | Goods or services transferred over time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 9,216,191 10,392,536 10,702,923
Operating segments [member] | Pension and Severance Fund Management      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 1,387,898 1,269,914 1,063,588
Operating segments [member] | Pension and Severance Fund Management | Goods or services transferred at point in time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 91,914 84,808 75,527
Operating segments [member] | Pension and Severance Fund Management | Goods or services transferred over time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 1,295,984 1,185,106 988,061
Operating segments [member] | Holding      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 253,842 284,991 292,641
Operating segments [member] | Holding | Goods or services transferred at point in time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers 253,842 284,991 292,641
Elimination of intersegment amounts [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers (338,406) (389,725) (382,827)
Elimination of intersegment amounts [member] | Goods or services transferred at point in time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers (268,890) (304,843) (315,340)
Elimination of intersegment amounts [member] | Goods or services transferred over time [member]      
Disclosure of operating segments [line items]      
Revenue from contracts with customers $ (69,516) $ (84,882) $ (67,487)