EMPLOYEE BENEFITS - Liabilities for employee benefits (Details) - COP ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of defined benefit plans [line items] | ||
| Gross employee benefits | $ 989,496 | $ 1,027,429 |
| Plan Asset | (1,744) | (24,126) |
| Net employee benefits | 987,752 | 1,003,303 |
| Short term | ||
| Disclosure of defined benefit plans [line items] | ||
| Gross employee benefits | 445,826 | 441,644 |
| Post-employment | ||
| Disclosure of defined benefit plans [line items] | ||
| Gross employee benefits | 362,588 | 405,240 |
| Long term | ||
| Disclosure of defined benefit plans [line items] | ||
| Gross employee benefits | $ 181,082 | $ 180,545 |