v3.26.1
EMPLOYEE BENEFITS - Post-employment and long-term benefits movements (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Post-Employment benefits      
Disclosure of net defined benefit liability (asset) [line items]      
Balance at the beginning of the year $ 381,114 $ 363,183  
Balance at the end of the year 360,844 381,114 $ 363,183
Long-Term Benefits      
Disclosure of net defined benefit liability (asset) [line items]      
Balance at the beginning of the year 180,545 159,329  
Balance at the end of the year 181,082 180,545 159,329
Present value of defined benefit obligation [member] | Post-Employment benefits      
Disclosure of net defined benefit liability (asset) [line items]      
Balance at the beginning of the year 405,240 380,207 349,587
Service costs 2,278 1,260 1,494
Interests cost 36,365 39,008 41,076
Past Service Costs     (2,079)
Net defined benefit liability asset After Adjustment 443,883 420,475 390,078
Actuarial Loss (Gain) arising from changes in demographic assumptions   95 (753)
Actuarial Loss (Gain) arising from changes in financial assumptions (18,314) 2,309 26,832
Actuarial Loss arising from changes in the experience 8,294 40,293 27,472
Total changes in actuarial assumptions (10,020) 42,697 53,551
Payments to employees (54,308) (63,202) (61,589)
Reclassification MFG operation (15,909)    
Discontinued operations 2,558 2,640 1,856
Effect of movements in exchange rates (3,616) 2,630 (3,689)
Balance at the end of the year 362,588 405,240 380,207
Present value of defined benefit obligation [member] | Long-Term Benefits      
Disclosure of net defined benefit liability (asset) [line items]      
Balance at the beginning of the year 180,545 159,329 133,085
Service costs 17,676 15,905 14,765
Interests cost 16,318 15,439 16,699
Past Service Costs   4,795 10,063
Net defined benefit liability asset After Adjustment 214,539 195,468 174,612
Actuarial Loss (Gain) arising from changes in demographic assumptions   1,010 (7,342)
Actuarial Loss (Gain) arising from changes in financial assumptions (7,932) 2,036 473
Actuarial Loss arising from changes in the experience 5,105 9,812 17,313
Total changes in actuarial assumptions (2,827) 12,858 10,444
Payments to employees (30,630) (27,781) (25,727)
Balance at the end of the year 181,082 180,545 159,329
Plan assets [member] | Post-Employment benefits      
Disclosure of net defined benefit liability (asset) [line items]      
Balance at the beginning of the year (24,126) (17,024) (18,176)
Interests cost (72) (68) (58)
Reclassification MFG operation 15,909    
Discontinued operations (843) (984) (736)
Effect of movements in exchange rates 3,615 (2,665) 3,734
Remeasurements on plan assets 3,773 (3,385) (1,788)
Balance at the end of the year $ (1,744) $ (24,126) $ (17,024)