v3.26.1
ESTIMATION OF FAIR VALUE - Reconciliation Level 3 of the fair value hierarchy - Tabular disclosure (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period $ 327,859,383    
Changes in fair value recognised in profit or loss 623,163 $ 350,919 $ 323,685
Assets at the end of the period 348,936,677 327,859,383  
Recurring fair value measurement [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 54,083,268    
Assets at the end of the period 63,143,409 54,083,268  
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 8,707,511    
Assets at the end of the period 7,466,012 8,707,511  
Financial Assets In Concession [Member] | Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 4,181,835 3,830,916 3,507,231
Changes in fair value recognised in profit or loss 623,163 350,919 323,685
Net effect from concession termination (2,169,561)    
Assets at the end of the period 2,635,437 4,181,835 3,830,916
Debt securities [member] | Recurring fair value measurement [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 38,989,037    
Assets at the end of the period 46,038,800 38,989,037  
Debt securities [member] | Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 1,425 1,889 1,383
Changes in fair value recognised in profit or loss 729 (464) 506
Execution of the conversion option of the BOCEA into shares (1,425)    
Additions 169,069    
Assets at the end of the period 169,798 1,425 1,889
Equity securities | Recurring fair value measurement [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 8,677,809    
Assets at the end of the period 10,897,205 8,677,809  
Equity securities | Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 3,312,977 2,770,226 2,302,280
Changes in fair value recognised in profit or loss 429,160 211,414 221,926
Changes in fair value recognised in OCI 22,076 (6,819) 39,566
Additions 569,789 326,096 830,718
Sales/redemptions   (1,199) (606,614)
Discontinued operations   13,259 (17,650)
Transfers from level 2 to level 3 28    
Reclassification MFG operation (87,823)    
Assets at the end of the period 4,246,207 3,312,977 2,770,226
Biological assets [member] | Recurring fair value measurement [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 238,339    
Assets at the end of the period 235,409 238,339  
Biological assets [member] | Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 238,339 230,672 212,630
Changes in fair value recognised in profit or loss 3,396 7,589 18,601
Additions 27,222 26,572 26,118
Sales/redemptions (33,548) (26,494) (26,677)
Assets at the end of the period 235,409 238,339 230,672
Investment property [member] | Recurring fair value measurement [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 972,935    
Assets at the end of the period 882,979 972,935  
Investment property [member] | Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member]      
Disclosure of fair value measurement of assets [line items]      
Assets at the beginning of the period 972,935 906,469 880,963
Changes in fair value recognised in profit or loss 4,905 36,705 92,607
Changes in fair value recognised in OCI (1,915) 16,935 557
Net effect from concession termination 6,675    
Transfers to non-current assets held for sale 19,388 22,370 95,593
Reclassification   32,470 (4,160)
Effect of movements in exchange rates (5,946) 6,966 (7,079)
Additions 4,721 37,859 56,307
Sales/redemptions (129,377) (85,975) (200,670)
Discontinued operations 3,908 (864) (7,649)
Transfers from level 3 to level 2 (696,084)    
Reclassification MFG operation (49)    
Assets at the end of the period $ 179,161 $ 972,935 $ 906,469