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Combined Guarantor Subsidiaries - Mortgage Notes Payable, Net - Net Mortgage Notes Payable (Parenthetical) (Details) | Jun. 30, 2020
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Debt Disclosure [Abstract] |
Non-recourse loan default additional interest rate above stated interest rate | 3.00%

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- Definition Non-recourse loan default additional interest rate above stated interest rate. + References No definition available. + Details
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Namespace Prefix: | cbl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration