SIGNIFICANT ACCOUNTING POLICIES - Debt exchange (Details)	Dec. 31, 2022
SIGNIFICANT ACCOUNTING POLICIES
Difference in present value of discounted cash flows of new debt instruments as a percentage of the original debt instrument	10.00%

The maximum threshold difference in present value of discounted cash flows of new debt instruments as a percentage of the original debt instrument.

No definition available.

Name:	cib_DifferenceInPresentValueOfDiscountedCashFlowsOfNewDebtInstrumentsPercentage
Namespace Prefix:	cib_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant