v3.26.1
GOODWILL - Cash-generating units - General information (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
COP ($)
Disclosure of information for cash-generating units [line items]  
Explanation of period over which management has projected cash flows Such calculations used cash flow projections, covering periods from 5 to 11 years.
Impairment $ 5,880
Bottom of range [member]  
Disclosure of information for cash-generating units [line items]  
Explanation of period over which management has projected cash flows, period 5 years
Top of range [member]  
Disclosure of information for cash-generating units [line items]  
Explanation of period over which management has projected cash flows, period 11 years
Sociedad Administradora de Fondos de Pensiones, Cesantias y del CCAI Porvenir S.A.  
Disclosure of information for cash-generating units [line items]  
Explanation of period over which management has projected cash flows 11-years projection
Explanation of period over which management has projected cash flows, period 11 years
Recoverable amount of asset or cash-generating unit $ 11,514,603
Exceeds the book value of cash generating-unit $ 7,734,572
Growth rate used to extrapolate cash flow projections 3.00%
Increase decrease in discount rate applied to cash flow projections 0.50%
Recoverable value if discount rate was 0.5% higher $ 13,637,155
Book value of cash-generating unit $ 3,780,031
Banco de Bogota S.A. over Megabanco  
Disclosure of information for cash-generating units [line items]  
Explanation of period over which management has projected cash flows 5-years projection
Explanation of period over which management has projected cash flows, period 5 years
Recoverable amount of asset or cash-generating unit $ 14,631,671
Exceeds the book value of cash generating-unit $ 7,652,115
Growth rate used to extrapolate cash flow projections 5.90%
Increase decrease in discount rate applied to cash flow projections 0.50%
Recoverable value if discount rate was 0.5% higher $ 13,317,581
Book value of cash-generating unit $ 6,979,556
Banco Popular S.A.  
Disclosure of information for cash-generating units [line items]  
Explanation of period over which management has projected cash flows 5-years projection
Explanation of period over which management has projected cash flows, period 5 years
Recoverable amount of asset or cash-generating unit $ 3,153,850
Exceeds the book value of cash generating-unit $ 375,722
Growth rate used to extrapolate cash flow projections 5.80%
Increase decrease in discount rate applied to cash flow projections 0.50%
Recoverable value if discount rate was 0.5% higher $ 2,867,575
Book value of cash-generating unit $ 2,778,128
Banco de Bogota S.A.  
Disclosure of information for cash-generating units [line items]  
Explanation of period over which management has projected cash flows 5-years projection
Explanation of period over which management has projected cash flows, period 5 years
Recoverable amount of asset or cash-generating unit $ 17,625,648
Exceeds the book value of cash generating-unit $ 7,622,954
Growth rate used to extrapolate cash flow projections 5.80%
Increase decrease in discount rate applied to cash flow projections 0.50%
Recoverable value if discount rate was 0.5% higher $ 15,973,992
Book value of cash-generating unit $ 10,002,694