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MORTGAGE AND OTHER INDEBTEDNESS, NET - Covenants and Restrictions (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)
Non-recourse loans on operating properties
Debt Instrument [Line Items]
Debt default threshold, minimum loan amount (greater than)	$ 50,000,000

X

- Definition

Debt Instrument, Debt Default Threshold, Minimum Loan Amount

+ References

No definition available.

+ Details

Name:	cbl_DebtInstrumentDebtDefaultThresholdMinimumLoanAmount
Namespace Prefix:	cbl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=cbl_NonRecourseLoansonOperatingPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: